diff --git a/.github/workflows/build-cppfront.yaml b/.github/workflows/build-cppfront.yaml
index 29364c468..d1282924c 100644
--- a/.github/workflows/build-cppfront.yaml
+++ b/.github/workflows/build-cppfront.yaml
@@ -22,7 +22,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        runs-on: [ubuntu-latest]
+        runs-on: [ubuntu-22.04]
         compiler: [g++-10, g++-11, g++-12, clang++-12, clang++-14]
         cxx-std: ['c++20', 'c++2b']
         exclude:
@@ -38,6 +38,18 @@ jobs:
           - runs-on: macos-latest
             compiler: clang++
             cxx-std: 'c++20'
+          - runs-on: ubuntu-24.04
+            compiler: clang++-16
+            cxx-std: 'c++20'
+          - runs-on: ubuntu-24.04
+            compiler: clang++-17
+            cxx-std: 'c++20'
+          - runs-on: ubuntu-24.04
+            compiler: clang++-18
+            cxx-std: 'c++20'
+          - runs-on: ubuntu-24.04
+            compiler: g++-14
+            cxx-std: 'c++2b'
     runs-on: ${{ matrix.runs-on }}
     env:
       CXX: ${{ matrix.compiler }}
diff --git a/.github/workflows/regression-tests.yml b/.github/workflows/regression-tests.yml
index 18ea18379..96071e977 100644
--- a/.github/workflows/regression-tests.yml
+++ b/.github/workflows/regression-tests.yml
@@ -11,7 +11,7 @@ on:
 
 jobs:
   regression-tests:
-    name: Run on ${{ matrix.os }} using ${{ matrix.compiler }}
+    name: ${{ matrix.shortosname }} | ${{ matrix.compiler }} | ${{ matrix.cxx_std }} | ${{ matrix.stdlib }} | ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
     env:
       CXX: ${{ matrix.compiler }}
@@ -19,21 +19,62 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest]
-        compiler: [g++-10, clang++-15]
+        os: [ubuntu-24.04]
+        shortosname: [ubu-24]
+        compiler: [g++-14, g++-13]
+        cxx_std: [c++2b]
+        stdlib: [libstdc++]
         include:
+          - os: ubuntu-20.04
+            shortosname: ubu-20
+            compiler: g++-10
+            cxx_std: c++20
+            stdlib: libstdc++
           - os: ubuntu-24.04
-            compiler: g++-13
+            shortosname: ubu-24
+            compiler: clang++-18
+            cxx_std: c++20
+            stdlib: libstdc++
+          - os: ubuntu-22.04
+            shortosname: ubu-22
+            compiler: clang++-15
+            cxx_std: c++20
+            stdlib: libstdc++
+          - os: ubuntu-22.04
+            shortosname: ubu-22
+            compiler: clang++-15
+            cxx_std: c++20
+            stdlib: libc++-15-dev
           - os: ubuntu-20.04
+            shortosname: ubu-20
             compiler: clang++-12
+            cxx_std: c++20
+            stdlib: libstdc++
           - os: macos-14
+            shortosname: mac-14
             compiler: clang++
+            cxx_std: c++2b
+            stdlib: default
           - os: macos-13
+            shortosname: mac-13
             compiler: clang++
+            cxx_std: c++2b
+            stdlib: default
           - os: macos-13
+            shortosname: mac-13
             compiler: clang++-15
-          - os: windows-latest
+            cxx_std: c++2b
+            stdlib: default
+          - os: windows-2022
+            shortosname: win-22
+            compiler: cl.exe
+            cxx_std: c++latest
+            stdlib: default
+          - os: windows-2022
+            shortosname: win-22
             compiler: cl.exe
+            cxx_std: c++20
+            stdlib: default
     steps:
     - name: Checkout repo
       uses: actions/checkout@v4
@@ -48,7 +89,7 @@ jobs:
       if: startsWith(matrix.os, 'ubuntu') || startsWith(matrix.os, 'macos')
       run: |
         cd regression-tests
-        bash run-tests.sh -c ${{ matrix.compiler }} -l ${{ matrix.os }}
+        bash run-tests.sh -c ${{ matrix.compiler }} -s ${{ matrix.cxx_std }} -d ${{ matrix.stdlib }} -l ${{ matrix.os }}
 
     - name: Run regression tests - Windows version
       if: matrix.os == 'windows-latest'
@@ -56,13 +97,13 @@ jobs:
         "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvars64.bat" && ^
         git config --local core.autocrlf false && ^
         cd regression-tests && ^
-        bash run-tests.sh -c ${{ matrix.compiler }} -l ${{ matrix.os }}
+        bash run-tests.sh -c ${{ matrix.compiler }} -s ${{ matrix.cxx_std }} -d ${{ matrix.stdlib }} -l ${{ matrix.os }}
       shell: cmd
 
     - name: Upload patch
       if: ${{ !cancelled() }}
       uses: actions/upload-artifact@v4
       with:
-        name: ${{ matrix.os }}-${{ matrix.compiler }}.patch
-        path: regression-tests/${{ matrix.os }}-${{ matrix.compiler }}.patch
+        name: ${{ matrix.os }}-${{ matrix.compiler }}-${{ matrix.cxx_std }}-${{ matrix.stdlib }}.patch
+        path: regression-tests/${{ matrix.os }}-${{ matrix.compiler }}-${{ matrix.cxx_std }}-${{ matrix.stdlib }}.patch
         if-no-files-found: ignore
diff --git a/docs/cpp2/common.md b/docs/cpp2/common.md
index 79420db36..b2fb28e38 100644
--- a/docs/cpp2/common.md
+++ b/docs/cpp2/common.md
@@ -67,7 +67,7 @@ All lists use `,` commas between list items, and may be enclosed by
 
 For example:
 
-``` cpp title="Lists, using optional trailing commas just because we can" hl_lines="1 4 6 7"
+``` cpp title="Lists" hl_lines="1 4 6 7"
 print: <T,U> (t: T, u: U) = std::cout << t << u << "\n";
 
 main: () = {
diff --git a/docs/cpp2/declarations.md b/docs/cpp2/declarations.md
index 3f46627a5..cbb553af6 100644
--- a/docs/cpp2/declarations.md
+++ b/docs/cpp2/declarations.md
@@ -254,7 +254,7 @@ main: () = {
     //  Assertion that the size is the square of 4
     static_assert( ints.size() == 16 );
 
-    //  And if can be used at run time, with run time values
+    //  And it can be used at run time, with run time values
     std::cout << "the square of 4 is (square(4))$\n";
 }
 //  Prints:
diff --git a/docs/cpp2/expressions.md b/docs/cpp2/expressions.md
index 11822887f..2bf52f4c7 100644
--- a/docs/cpp2/expressions.md
+++ b/docs/cpp2/expressions.md
@@ -173,13 +173,11 @@ Here are some `as` casts with their Cpp1 equivalents. In this table, uppercase n
 
 ## <a id="inspect"></a> `inspect` — pattern matching
 
-An `inspect expr -> Type` expression allows pattern matching using `is`.
+An `inspect expr -> Type = { /* alternatives */ }` expression allows pattern matching using `is`.
 
 - `expr` is evaluated once.
 
-- Each alternative spelled `is C` is evaluated in order as if called with `expr is C`.
-
-- If an alternative evaluates to `#!cpp true`, then its `#!cpp = alternative;` body is used as the value of the entire `inspect` expression, and the meaning is the same as if the entire `inspect` expression had been written as just `#!cpp :Type = alternative;` — i.e., an unnamed object expression (aka 'temporary object') of type `Type` initialized with `alternative`.
+- Each alternative is spelled `is C = statement;` and are evaluated in order. Each `is C` is evaluated if called with `expr is C`, and if it alternative evaluates to `#!cpp true`, then its `#!cpp = alternative;` body is used as the value of the entire `inspect` expression, and the meaning is the same as if the entire `inspect` expression had been written as just `#!cpp :Type = alternative;` — i.e., an unnamed object expression (aka 'temporary object') of type `Type` initialized with `alternative`.
 
 - A catchall `is _` is required.
 
diff --git a/docs/cpp2/types.md b/docs/cpp2/types.md
index 39cfd1dfa..d9cf9c5ab 100644
--- a/docs/cpp2/types.md
+++ b/docs/cpp2/types.md
@@ -81,7 +81,7 @@ For example:
 abstract_base: type
 = {
     //  A pure virtual function: virtual + no body
-    print: (virtual this, msg: std::string);
+    print: (virtual this, msg: std::string) = { /*...*/ }
 
     // ...
 }
@@ -92,7 +92,7 @@ derived: type
     this: abstract_base;
 
     //  Explicit override
-    print: (override this, msg: std::string);
+    print: (override this, msg: std::string) = { /*...*/ }
 
     // ...
 }
@@ -199,7 +199,7 @@ mytype: type
     name:          std::string;
     social_handle: std::string = "(unknown)";
 
-    //  conversion from string
+    //  conversion from string (construction + assignment)
     operator=: (out this, who: std::string) = {
         name = who;
         //  if social_handle is not mentioned, defaults to:
diff --git a/include/cpp2util.h b/include/cpp2util.h
index 2a9014266..1bf3e9b4b 100644
--- a/include/cpp2util.h
+++ b/include/cpp2util.h
@@ -512,6 +512,12 @@ template <typename T>
     requires requires { *std::declval<T&>(); }
 using deref_t = decltype(*std::declval<T&>());
 
+//  Guaranteed to be a total order, unlike built-in operator== for T*
+template <typename T>
+auto pointer_eq(T const* a, T const* b) {
+    return std::compare_three_way{}(a, b) == std::strong_ordering::equal;
+}
+
 
 //-----------------------------------------------------------------------
 //
diff --git a/regression-tests/run-tests.sh b/regression-tests/run-tests.sh
index 50c919e08..6640786fa 100644
--- a/regression-tests/run-tests.sh
+++ b/regression-tests/run-tests.sh
@@ -4,6 +4,8 @@
 usage() {
     echo "Usage: $0 -c <compiler> [-l <run label>] [-t <tests to run>]"
     echo "    -c <compiler>     The compiler to use for the test"
+    echo "    -s <cxx_std>      The C++ standard to compile with (e.g. 'c++20', 'c++2b', 'c++latest' depending on the compiler)"
+    echo "    -d <stdlib>       Clang-only: the C++ Standard Library to link with ('libstdc++', 'libc++', or 'default' for platform default)"
     echo "    -l <run label>    The label to use in output patch file name"
     echo "    -t <tests to run> Runs only the provided, comma-separated tests (filenames including .cpp2)"
     echo "                      If the argument is not used all tests are run"
@@ -46,7 +48,7 @@ check_file () {
     git ls-files --error-unmatch "$file" > /dev/null 2>&1
     untracked=$?
 
-    patch_file="$label$cxx_compiler.patch"
+    patch_file="${label}-${cxx_compiler}-${cxx_std}-${cxx_stdlib}.patch"
 
     if [[ $untracked -eq 1 ]]; then
         # Add the file to the index to be able to diff it...
@@ -67,14 +69,20 @@ check_file () {
     fi
 }
 
-optstring="c:l:t:"
+optstring="c:s:d:l:t:"
 while getopts ${optstring} arg; do
   case "${arg}" in
     c)
         cxx_compiler="${OPTARG}"
         ;;
+    s)
+        cxx_std="${OPTARG}"
+        ;;
+    d)
+        cxx_stdlib="${OPTARG}"
+        ;;
     l)
-        label="${OPTARG}-"
+        label="${OPTARG}"
         ;;
     t)
         # Replace commas with spaces
@@ -125,8 +133,8 @@ expected_results_dir="test-results"
 ################
 # Get the directory with the exec outputs and compilation command
 if [[ "$cxx_compiler" == *"cl.exe"* ]]; then
-    compiler_cmd='cl.exe -nologo -std:c++latest -MD -EHsc -I ..\..\..\include -Fe:'
-    exec_out_dir="$expected_results_dir/msvc-2022"
+    compiler_cmd="cl.exe -nologo -std:${cxx_std} -MD -EHsc -I ..\..\..\include -Fe:"
+    exec_out_dir="$expected_results_dir/msvc-2022-${cxx_std}"
     compiler_version=$(cl.exe)
 else
     # Verify the compiler command
@@ -136,7 +144,6 @@ else
         exit 2
     fi
 
-    cpp_std=c++2b
     compiler_version=$("$cxx_compiler" --version)
 
     if [[ "$compiler_version" == *"Apple clang version 14.0"* ||
@@ -148,22 +155,51 @@ else
         exec_out_dir="$expected_results_dir/clang-12"
     elif [[ "$compiler_version" == *"clang version 15.0"* ]]; then 
         exec_out_dir="$expected_results_dir/clang-15"
-        # c++2b causes starge issues on GitHub ubuntu-latest runner
-        cpp_std="c++20"
+    elif [[ "$compiler_version" == *"clang version 18.1"* ]]; then 
+        exec_out_dir="$expected_results_dir/clang-18"
     elif [[ "$compiler_version" == *"g++-10"* ]]; then
         exec_out_dir="$expected_results_dir/gcc-10"
-        # GCC 10 does not support c++2b
-        cpp_std=c++20
     elif [[ "$compiler_version" == *"g++-12"* ||
             "$compiler_version" == *"g++-13"*
          ]]; then
         exec_out_dir="$expected_results_dir/gcc-13"
+    elif [[ "$compiler_version" == *"g++-14"* ]]; then
+        exec_out_dir="$expected_results_dir/gcc-14"
     else
         printf "Unhandled compiler version:\n$compiler_version\n\n"
         exit 2
     fi
 
-    compiler_cmd="$cxx_compiler -I../../../include -std=$cpp_std -pthread -o "
+    # Append the C++ standard (e.g. 'c++20') to the expected output dir name
+    exec_out_dir="${exec_out_dir}-${cxx_std}"
+
+    # Clang can link with either libstdc++ or libc++
+    # By default clang on ubuntu links with libstdc++ and on macOS links with libc++.
+    if [[ "$compiler_version" == *"clang"* ]]; then 
+        if [[ "$cxx_stdlib" == "default" || "$cxx_stdlib" == "" ]]; then
+            cxx_stdlib_link_arg=""  # Use compiler/platform default
+        elif [[ "$cxx_stdlib" == "libstdc++" ]]; then
+            cxx_stdlib_link_arg="-stdlib=libstdc++"
+        elif [[ "$cxx_stdlib" == *"libc++"* ]]; then
+
+            # Need to install the correct libc++ packages, e.g. `libc++-15-dev` and `libc++abi-15-dev` for clang 15.
+            # Our `cxx_stdlib` variable contains the `libc++-XX-dev` package name so we need to create the abi version.
+            cxx_stdlib_abi_package="${cxx_stdlib/libc++/libc++abi}"
+            printf "Installing packages: $cxx_stdlib $cxx_stdlib_abi_package\n\n"
+            sudo apt-get install -y $cxx_stdlib $cxx_stdlib_abi_package
+
+            cxx_stdlib_link_arg="-stdlib=libc++"
+            exec_out_dir="${exec_out_dir}-libcpp"
+        else
+            printf "Unhandled C++ Standard Library option:\n$cxx_stdlib\n\n"
+            exit 2
+        fi
+    else
+        cxx_stdlib_link_arg=""  # Use compiler/platform default
+    fi
+
+    compiler_cmd="$cxx_compiler -I../../../include -std=$cxx_std $cxx_stdlib_link_arg -pthread -o "
+    printf "\ncompiler_cmd: $compiler_cmd\n\n"
 fi
 
 if [[ -d "$exec_out_dir" ]]; then
@@ -171,7 +207,7 @@ if [[ -d "$exec_out_dir" ]]; then
 
     printf "Directory with reference compilation/execution files to use:\n$exec_out_dir\n\n"
 else
-    printf "Directory with reference compilation/execution files not found for compiler: '$cxx_compiler'\n\n"
+    printf "Directory with reference compilation/execution files not found for compiler: '$cxx_compiler' at $exec_out_dir\n\n"
     exit 2
 fi
 
@@ -191,8 +227,8 @@ regression_test_link_obj=""
 if [[ "$cxx_compiler" == *"cl.exe"* ]]; then
     echo "Building std and std.compat modules"
     (cd $exec_out_dir; \
-     cl.exe -nologo -std:c++latest -MD -EHsc -c "${VCToolsInstallDir}/modules/std.ixx";
-     cl.exe -nologo -std:c++latest -MD -EHsc -c "${VCToolsInstallDir}/modules/std.compat.ixx")
+     cl.exe -nologo -std:${cxx_std} -MD -EHsc -c "${VCToolsInstallDir}/modules/std.ixx";
+     cl.exe -nologo -std:${cxx_std} -MD -EHsc -c "${VCToolsInstallDir}/modules/std.compat.ixx")
     regression_test_link_obj="std.obj std.compat.obj"
 fi
 
diff --git a/regression-tests/test-results/apple-clang-14/clang-version.output b/regression-tests/test-results/apple-clang-14-c++2b/clang-version.output
similarity index 100%
rename from regression-tests/test-results/apple-clang-14/clang-version.output
rename to regression-tests/test-results/apple-clang-14-c++2b/clang-version.output
diff --git a/regression-tests/test-results/apple-clang-14/mixed-allcpp1-hello.cpp.execution b/regression-tests/test-results/apple-clang-14-c++2b/mixed-allcpp1-hello.cpp.execution
similarity index 100%
rename from regression-tests/test-results/apple-clang-14/mixed-allcpp1-hello.cpp.execution
rename to regression-tests/test-results/apple-clang-14-c++2b/mixed-allcpp1-hello.cpp.execution
diff --git a/regression-tests/test-results/apple-clang-14/mixed-allcpp1-hello.cpp.output b/regression-tests/test-results/apple-clang-14-c++2b/mixed-allcpp1-hello.cpp.output
similarity index 100%
rename from regression-tests/test-results/apple-clang-14/mixed-allcpp1-hello.cpp.output
rename to regression-tests/test-results/apple-clang-14-c++2b/mixed-allcpp1-hello.cpp.output
diff --git a/regression-tests/test-results/apple-clang-14/mixed-as-for-variant-20-types.cpp.execution b/regression-tests/test-results/apple-clang-14-c++2b/mixed-as-for-variant-20-types.cpp.execution
similarity index 100%
rename from regression-tests/test-results/apple-clang-14/mixed-as-for-variant-20-types.cpp.execution
rename to regression-tests/test-results/apple-clang-14-c++2b/mixed-as-for-variant-20-types.cpp.execution
diff --git a/regression-tests/test-results/apple-clang-14/mixed-as-for-variant-20-types.cpp.output b/regression-tests/test-results/apple-clang-14-c++2b/mixed-as-for-variant-20-types.cpp.output
similarity index 100%
rename from regression-tests/test-results/apple-clang-14/mixed-as-for-variant-20-types.cpp.output
rename to regression-tests/test-results/apple-clang-14-c++2b/mixed-as-for-variant-20-types.cpp.output
diff --git a/regression-tests/test-results/apple-clang-14/mixed-bounds-check.cpp.execution b/regression-tests/test-results/apple-clang-14-c++2b/mixed-bounds-check.cpp.execution
similarity index 100%
rename from regression-tests/test-results/apple-clang-14/mixed-bounds-check.cpp.execution
rename to regression-tests/test-results/apple-clang-14-c++2b/mixed-bounds-check.cpp.execution
diff --git a/regression-tests/test-results/apple-clang-14/mixed-bounds-check.cpp.output b/regression-tests/test-results/apple-clang-14-c++2b/mixed-bounds-check.cpp.output
similarity index 100%
rename from regression-tests/test-results/apple-clang-14/mixed-bounds-check.cpp.output
rename to regression-tests/test-results/apple-clang-14-c++2b/mixed-bounds-check.cpp.output
diff --git a/regression-tests/test-results/apple-clang-14/mixed-bounds-safety-with-assert-2.cpp.execution b/regression-tests/test-results/apple-clang-14-c++2b/mixed-bounds-safety-with-assert-2.cpp.execution
similarity index 100%
rename from regression-tests/test-results/apple-clang-14/mixed-bounds-safety-with-assert-2.cpp.execution
rename to regression-tests/test-results/apple-clang-14-c++2b/mixed-bounds-safety-with-assert-2.cpp.execution
diff --git a/regression-tests/test-results/apple-clang-14/mixed-bounds-safety-with-assert-2.cpp.output b/regression-tests/test-results/apple-clang-14-c++2b/mixed-bounds-safety-with-assert-2.cpp.output
similarity index 100%
rename from regression-tests/test-results/apple-clang-14/mixed-bounds-safety-with-assert-2.cpp.output
rename to regression-tests/test-results/apple-clang-14-c++2b/mixed-bounds-safety-with-assert-2.cpp.output
diff --git a/regression-tests/test-results/apple-clang-14/mixed-bounds-safety-with-assert.cpp.execution b/regression-tests/test-results/apple-clang-14-c++2b/mixed-bounds-safety-with-assert.cpp.execution
similarity index 100%
rename from regression-tests/test-results/apple-clang-14/mixed-bounds-safety-with-assert.cpp.execution
rename to regression-tests/test-results/apple-clang-14-c++2b/mixed-bounds-safety-with-assert.cpp.execution
diff --git a/regression-tests/test-results/apple-clang-14/mixed-bounds-safety-with-assert.cpp.output b/regression-tests/test-results/apple-clang-14-c++2b/mixed-bounds-safety-with-assert.cpp.output
similarity index 100%
rename from regression-tests/test-results/apple-clang-14/mixed-bounds-safety-with-assert.cpp.output
rename to regression-tests/test-results/apple-clang-14-c++2b/mixed-bounds-safety-with-assert.cpp.output
diff --git a/regression-tests/test-results/apple-clang-14/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.execution b/regression-tests/test-results/apple-clang-14-c++2b/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.execution
similarity index 100%
rename from regression-tests/test-results/apple-clang-14/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.execution
rename to regression-tests/test-results/apple-clang-14-c++2b/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.execution
diff --git a/regression-tests/test-results/apple-clang-14/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.output b/regression-tests/test-results/apple-clang-14-c++2b/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.output
similarity index 100%
rename from regression-tests/test-results/apple-clang-14/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.output
rename to regression-tests/test-results/apple-clang-14-c++2b/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.output
diff --git a/regression-tests/test-results/apple-clang-14/mixed-bugfix-for-literal-as-nttp.cpp.execution b/regression-tests/test-results/apple-clang-14-c++2b/mixed-bugfix-for-literal-as-nttp.cpp.execution
similarity index 100%
rename from regression-tests/test-results/apple-clang-14/mixed-bugfix-for-literal-as-nttp.cpp.execution
rename to regression-tests/test-results/apple-clang-14-c++2b/mixed-bugfix-for-literal-as-nttp.cpp.execution
diff --git a/regression-tests/test-results/apple-clang-14/mixed-bugfix-for-literal-as-nttp.cpp.output b/regression-tests/test-results/apple-clang-14-c++2b/mixed-bugfix-for-literal-as-nttp.cpp.output
similarity index 100%
rename from regression-tests/test-results/apple-clang-14/mixed-bugfix-for-literal-as-nttp.cpp.output
rename to regression-tests/test-results/apple-clang-14-c++2b/mixed-bugfix-for-literal-as-nttp.cpp.output
diff --git a/regression-tests/test-results/apple-clang-14/mixed-bugfix-for-ufcs-non-local.cpp.execution b/regression-tests/test-results/apple-clang-14-c++2b/mixed-bugfix-for-ufcs-non-local.cpp.execution
similarity index 100%
rename from regression-tests/test-results/apple-clang-14/mixed-bugfix-for-ufcs-non-local.cpp.execution
rename to regression-tests/test-results/apple-clang-14-c++2b/mixed-bugfix-for-ufcs-non-local.cpp.execution
diff --git a/regression-tests/test-results/apple-clang-14/mixed-bugfix-for-ufcs-non-local.cpp.output b/regression-tests/test-results/apple-clang-14-c++2b/mixed-bugfix-for-ufcs-non-local.cpp.output
similarity index 100%
rename from regression-tests/test-results/apple-clang-14/mixed-bugfix-for-ufcs-non-local.cpp.output
rename to regression-tests/test-results/apple-clang-14-c++2b/mixed-bugfix-for-ufcs-non-local.cpp.output
diff --git a/regression-tests/test-results/apple-clang-14/mixed-captures-in-expressions-and-postconditions.cpp.execution b/regression-tests/test-results/apple-clang-14-c++2b/mixed-captures-in-expressions-and-postconditions.cpp.execution
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diff --git a/regression-tests/test-results/clang-12/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution b/regression-tests/test-results/clang-12-c++20/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution
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rename from regression-tests/test-results/clang-12/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution
rename to regression-tests/test-results/clang-12-c++20/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution
diff --git a/regression-tests/test-results/clang-12/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.output b/regression-tests/test-results/clang-12-c++20/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.output
similarity index 100%
rename from regression-tests/test-results/clang-12/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.output
rename to regression-tests/test-results/clang-12-c++20/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.output
diff --git a/regression-tests/test-results/clang-12/pure2-types-that-parameters.cpp.execution b/regression-tests/test-results/clang-12-c++20/pure2-types-that-parameters.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-12/pure2-types-that-parameters.cpp.execution
rename to regression-tests/test-results/clang-12-c++20/pure2-types-that-parameters.cpp.execution
diff --git a/regression-tests/test-results/clang-12/pure2-types-that-parameters.cpp.output b/regression-tests/test-results/clang-12-c++20/pure2-types-that-parameters.cpp.output
similarity index 100%
rename from regression-tests/test-results/clang-12/pure2-types-that-parameters.cpp.output
rename to regression-tests/test-results/clang-12-c++20/pure2-types-that-parameters.cpp.output
diff --git a/regression-tests/test-results/clang-12/pure2-types-value-types-via-meta-functions.cpp.execution b/regression-tests/test-results/clang-12-c++20/pure2-types-value-types-via-meta-functions.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-12/pure2-types-value-types-via-meta-functions.cpp.execution
rename to regression-tests/test-results/clang-12-c++20/pure2-types-value-types-via-meta-functions.cpp.execution
diff --git a/regression-tests/test-results/clang-12/pure2-types-value-types-via-meta-functions.cpp.output b/regression-tests/test-results/clang-12-c++20/pure2-types-value-types-via-meta-functions.cpp.output
similarity index 100%
rename from regression-tests/test-results/clang-12/pure2-types-value-types-via-meta-functions.cpp.output
rename to regression-tests/test-results/clang-12-c++20/pure2-types-value-types-via-meta-functions.cpp.output
diff --git a/regression-tests/test-results/clang-12/pure2-ufcs-member-access-and-chaining.cpp.execution b/regression-tests/test-results/clang-12-c++20/pure2-ufcs-member-access-and-chaining.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-12/pure2-ufcs-member-access-and-chaining.cpp.execution
rename to regression-tests/test-results/clang-12-c++20/pure2-ufcs-member-access-and-chaining.cpp.execution
diff --git a/regression-tests/test-results/clang-12/pure2-ufcs-member-access-and-chaining.cpp.output b/regression-tests/test-results/clang-12-c++20/pure2-ufcs-member-access-and-chaining.cpp.output
similarity index 100%
rename from regression-tests/test-results/clang-12/pure2-ufcs-member-access-and-chaining.cpp.output
rename to regression-tests/test-results/clang-12-c++20/pure2-ufcs-member-access-and-chaining.cpp.output
diff --git a/regression-tests/test-results/clang-12/pure2-union.cpp.execution b/regression-tests/test-results/clang-12-c++20/pure2-union.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-12/pure2-union.cpp.execution
rename to regression-tests/test-results/clang-12-c++20/pure2-union.cpp.execution
diff --git a/regression-tests/test-results/clang-12/pure2-union.cpp.output b/regression-tests/test-results/clang-12-c++20/pure2-union.cpp.output
similarity index 100%
rename from regression-tests/test-results/clang-12/pure2-union.cpp.output
rename to regression-tests/test-results/clang-12-c++20/pure2-union.cpp.output
diff --git a/regression-tests/test-results/clang-12/pure2-variadics.cpp.execution b/regression-tests/test-results/clang-12-c++20/pure2-variadics.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-12/pure2-variadics.cpp.execution
rename to regression-tests/test-results/clang-12-c++20/pure2-variadics.cpp.execution
diff --git a/regression-tests/test-results/clang-12/pure2-variadics.cpp.output b/regression-tests/test-results/clang-12-c++20/pure2-variadics.cpp.output
similarity index 100%
rename from regression-tests/test-results/clang-12/pure2-variadics.cpp.output
rename to regression-tests/test-results/clang-12-c++20/pure2-variadics.cpp.output
diff --git a/regression-tests/test-results/clang-12/pure2-various-string-literals.cpp.execution b/regression-tests/test-results/clang-12-c++20/pure2-various-string-literals.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-12/pure2-various-string-literals.cpp.execution
rename to regression-tests/test-results/clang-12-c++20/pure2-various-string-literals.cpp.execution
diff --git a/regression-tests/test-results/clang-12/pure2-various-string-literals.cpp.output b/regression-tests/test-results/clang-12-c++20/pure2-various-string-literals.cpp.output
similarity index 100%
rename from regression-tests/test-results/clang-12/pure2-various-string-literals.cpp.output
rename to regression-tests/test-results/clang-12-c++20/pure2-various-string-literals.cpp.output
diff --git a/regression-tests/test-results/clang-12/run-tests-clang-12.sh b/regression-tests/test-results/clang-12-c++20/run-tests-clang-12.sh
similarity index 91%
rename from regression-tests/test-results/clang-12/run-tests-clang-12.sh
rename to regression-tests/test-results/clang-12-c++20/run-tests-clang-12.sh
index b36b8c38e..d179a2390 100644
--- a/regression-tests/test-results/clang-12/run-tests-clang-12.sh
+++ b/regression-tests/test-results/clang-12-c++20/run-tests-clang-12.sh
@@ -10,7 +10,7 @@ for f in *.cpp
 do
     let count=count+1
     printf "[%s] Starting clang++-12 %s\n" "$count" "$f"
-    clang++-12 -I../../../include -std=c++2b -pthread -Wunused-parameter -o test.exe $f > $f.output 2>&1
+    clang++-12 -I../../../include -std=c++20 -pthread -Wunused-parameter -o test.exe $f > $f.output 2>&1
     rm -f $f
     if test -f "test.exe"; then
         let exe_count=exe_count+1
diff --git a/regression-tests/test-results/clang-12/xyzzy b/regression-tests/test-results/clang-12-c++20/xyzzy
similarity index 100%
rename from regression-tests/test-results/clang-12/xyzzy
rename to regression-tests/test-results/clang-12-c++20/xyzzy
diff --git a/regression-tests/test-results/clang-15/clang-version.output b/regression-tests/test-results/clang-15-c++20-libcpp/clang-version.output
similarity index 100%
rename from regression-tests/test-results/clang-15/clang-version.output
rename to regression-tests/test-results/clang-15-c++20-libcpp/clang-version.output
diff --git a/regression-tests/test-results/clang-15/mixed-allcpp1-hello.cpp.execution b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-allcpp1-hello.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-allcpp1-hello.cpp.execution
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-allcpp1-hello.cpp.execution
diff --git a/regression-tests/test-results/clang-15/mixed-allcpp1-hello.cpp.output b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-allcpp1-hello.cpp.output
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-allcpp1-hello.cpp.output
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-allcpp1-hello.cpp.output
diff --git a/regression-tests/test-results/clang-15/mixed-as-for-variant-20-types.cpp.execution b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-as-for-variant-20-types.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-as-for-variant-20-types.cpp.execution
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-as-for-variant-20-types.cpp.execution
diff --git a/regression-tests/test-results/clang-15/mixed-as-for-variant-20-types.cpp.output b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-as-for-variant-20-types.cpp.output
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-as-for-variant-20-types.cpp.output
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-as-for-variant-20-types.cpp.output
diff --git a/regression-tests/test-results/clang-15/mixed-bounds-check.cpp.execution b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-bounds-check.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-bounds-check.cpp.execution
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-bounds-check.cpp.execution
diff --git a/regression-tests/test-results/clang-15/mixed-bounds-check.cpp.output b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-bounds-check.cpp.output
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-bounds-check.cpp.output
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-bounds-check.cpp.output
diff --git a/regression-tests/test-results/clang-15/mixed-bounds-safety-with-assert-2.cpp.execution b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-bounds-safety-with-assert-2.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-bounds-safety-with-assert-2.cpp.execution
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-bounds-safety-with-assert-2.cpp.execution
diff --git a/regression-tests/test-results/clang-15/mixed-bounds-safety-with-assert-2.cpp.output b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-bounds-safety-with-assert-2.cpp.output
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-bounds-safety-with-assert-2.cpp.output
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-bounds-safety-with-assert-2.cpp.output
diff --git a/regression-tests/test-results/clang-15/mixed-bounds-safety-with-assert.cpp.execution b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-bounds-safety-with-assert.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-bounds-safety-with-assert.cpp.execution
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-bounds-safety-with-assert.cpp.execution
diff --git a/regression-tests/test-results/clang-15/mixed-bounds-safety-with-assert.cpp.output b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-bounds-safety-with-assert.cpp.output
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-bounds-safety-with-assert.cpp.output
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-bounds-safety-with-assert.cpp.output
diff --git a/regression-tests/test-results/clang-15/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.execution b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.execution
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.execution
diff --git a/regression-tests/test-results/clang-15/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.output b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.output
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.output
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.output
diff --git a/regression-tests/test-results/clang-15/mixed-bugfix-for-literal-as-nttp.cpp.execution b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-bugfix-for-literal-as-nttp.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-bugfix-for-literal-as-nttp.cpp.execution
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-bugfix-for-literal-as-nttp.cpp.execution
diff --git a/regression-tests/test-results/clang-15/mixed-bugfix-for-literal-as-nttp.cpp.output b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-bugfix-for-literal-as-nttp.cpp.output
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-bugfix-for-literal-as-nttp.cpp.output
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-bugfix-for-literal-as-nttp.cpp.output
diff --git a/regression-tests/test-results/clang-15/mixed-bugfix-for-ufcs-non-local.cpp.execution b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-bugfix-for-ufcs-non-local.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-bugfix-for-ufcs-non-local.cpp.execution
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-bugfix-for-ufcs-non-local.cpp.execution
diff --git a/regression-tests/test-results/clang-15/mixed-bugfix-for-ufcs-non-local.cpp.output b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-bugfix-for-ufcs-non-local.cpp.output
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-bugfix-for-ufcs-non-local.cpp.output
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-bugfix-for-ufcs-non-local.cpp.output
diff --git a/regression-tests/test-results/clang-15-c++20-libcpp/mixed-captures-in-expressions-and-postconditions.cpp.output b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-captures-in-expressions-and-postconditions.cpp.output
new file mode 100644
index 000000000..cdd0a80e9
--- /dev/null
+++ b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-captures-in-expressions-and-postconditions.cpp.output
@@ -0,0 +1,7 @@
+mixed-captures-in-expressions-and-postconditions.cpp2:12:18: error: no member named 'for_each' in namespace 'std::ranges'
+    std::ranges::for_each(vec, callback);
+    ~~~~~~~~~~~~~^
+mixed-captures-in-expressions-and-postconditions.cpp2:14:18: error: no member named 'for_each' in namespace 'std::ranges'
+    std::ranges::for_each(cpp2::move(vec), cpp2::move(callback));
+    ~~~~~~~~~~~~~^
+2 errors generated.
diff --git a/regression-tests/test-results/clang-15/mixed-fixed-type-aliases.cpp.execution b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-fixed-type-aliases.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-fixed-type-aliases.cpp.execution
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-fixed-type-aliases.cpp.execution
diff --git a/regression-tests/test-results/clang-15/mixed-fixed-type-aliases.cpp.output b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-fixed-type-aliases.cpp.output
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-fixed-type-aliases.cpp.output
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-fixed-type-aliases.cpp.output
diff --git a/regression-tests/test-results/clang-15/mixed-float-literals.cpp.execution b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-float-literals.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-float-literals.cpp.execution
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-float-literals.cpp.execution
diff --git a/regression-tests/test-results/clang-15/mixed-float-literals.cpp.output b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-float-literals.cpp.output
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-float-literals.cpp.output
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-float-literals.cpp.output
diff --git a/regression-tests/test-results/clang-15/mixed-forwarding.cpp.execution b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-forwarding.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-forwarding.cpp.execution
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-forwarding.cpp.execution
diff --git a/regression-tests/test-results/clang-15/mixed-forwarding.cpp.output b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-forwarding.cpp.output
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-forwarding.cpp.output
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-forwarding.cpp.output
diff --git a/regression-tests/test-results/clang-15-c++20-libcpp/mixed-function-expression-and-std-for-each.cpp.output b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-function-expression-and-std-for-each.cpp.output
new file mode 100644
index 000000000..bd728c7b1
--- /dev/null
+++ b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-function-expression-and-std-for-each.cpp.output
@@ -0,0 +1,7 @@
+mixed-function-expression-and-std-for-each.cpp2:12:18: error: no member named 'for_each' in namespace 'std::ranges'
+    std::ranges::for_each(
+    ~~~~~~~~~~~~~^
+mixed-function-expression-and-std-for-each.cpp2:19:18: error: no member named 'for_each' in namespace 'std::ranges'
+    std::ranges::for_each(
+    ~~~~~~~~~~~~~^
+2 errors generated.
diff --git a/regression-tests/test-results/clang-15-c++20-libcpp/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.output b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.output
new file mode 100644
index 000000000..9b0737fa2
--- /dev/null
+++ b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.output
@@ -0,0 +1,7 @@
+mixed-function-expression-and-std-ranges-for-each-with-capture.cpp2:13:18: error: no member named 'for_each' in namespace 'std::ranges'
+    std::ranges::for_each
+    ~~~~~~~~~~~~~^
+mixed-function-expression-and-std-ranges-for-each-with-capture.cpp2:17:18: error: no member named 'for_each' in namespace 'std::ranges'
+    std::ranges::for_each(vec, cpp2::move(callback));
+    ~~~~~~~~~~~~~^
+2 errors generated.
diff --git a/regression-tests/test-results/clang-15-c++20-libcpp/mixed-function-expression-and-std-ranges-for-each.cpp.output b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-function-expression-and-std-ranges-for-each.cpp.output
new file mode 100644
index 000000000..cb0d9071f
--- /dev/null
+++ b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-function-expression-and-std-ranges-for-each.cpp.output
@@ -0,0 +1,7 @@
+mixed-function-expression-and-std-ranges-for-each.cpp2:12:18: error: no member named 'for_each' in namespace 'std::ranges'
+    std::ranges::for_each
+    ~~~~~~~~~~~~~^
+mixed-function-expression-and-std-ranges-for-each.cpp2:16:18: error: no member named 'for_each' in namespace 'std::ranges'
+    std::ranges::for_each(vec, cpp2::move(callback));
+    ~~~~~~~~~~~~~^
+2 errors generated.
diff --git a/regression-tests/test-results/clang-15-c++20-libcpp/mixed-function-expression-with-pointer-capture.cpp.output b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-function-expression-with-pointer-capture.cpp.output
new file mode 100644
index 000000000..e498f2c95
--- /dev/null
+++ b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-function-expression-with-pointer-capture.cpp.output
@@ -0,0 +1,7 @@
+mixed-function-expression-with-pointer-capture.cpp2:13:18: error: no member named 'for_each' in namespace 'std::ranges'
+    std::ranges::for_each(vec, [_0 = (&y)](auto const& x) mutable -> void { 
+    ~~~~~~~~~~~~~^
+mixed-function-expression-with-pointer-capture.cpp2:18:18: error: no member named 'for_each' in namespace 'std::ranges'
+    std::ranges::for_each(vec, cpp2::move(callback));
+    ~~~~~~~~~~~~~^
+2 errors generated.
diff --git a/regression-tests/test-results/clang-15-c++20-libcpp/mixed-function-expression-with-repeated-capture.cpp.output b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-function-expression-with-repeated-capture.cpp.output
new file mode 100644
index 000000000..22e8ecc97
--- /dev/null
+++ b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-function-expression-with-repeated-capture.cpp.output
@@ -0,0 +1,7 @@
+mixed-function-expression-with-repeated-capture.cpp2:13:18: error: no member named 'for_each' in namespace 'std::ranges'
+    std::ranges::for_each
+    ~~~~~~~~~~~~~^
+mixed-function-expression-with-repeated-capture.cpp2:17:18: error: no member named 'for_each' in namespace 'std::ranges'
+    std::ranges::for_each(vec, cpp2::move(callback));
+    ~~~~~~~~~~~~~^
+2 errors generated.
diff --git a/regression-tests/test-results/clang-15/mixed-hello.cpp.execution b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-hello.cpp.execution
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-hello.cpp.execution
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-hello.cpp.execution
diff --git a/regression-tests/test-results/clang-15/mixed-hello.cpp.output b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-hello.cpp.output
similarity index 100%
rename from regression-tests/test-results/clang-15/mixed-hello.cpp.output
rename to regression-tests/test-results/clang-15-c++20-libcpp/mixed-hello.cpp.output
diff --git a/regression-tests/test-results/clang-15/mixed-increment-decrement.cpp.execution b/regression-tests/test-results/clang-15-c++20-libcpp/mixed-increment-decrement.cpp.execution
similarity index 100%
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diff --git a/regression-tests/test-results/clang-15-c++20-libcpp/pure2-assert-expected-not-null.cpp.output b/regression-tests/test-results/clang-15-c++20-libcpp/pure2-assert-expected-not-null.cpp.output
new file mode 100644
index 000000000..94d006323
--- /dev/null
+++ b/regression-tests/test-results/clang-15-c++20-libcpp/pure2-assert-expected-not-null.cpp.output
@@ -0,0 +1,19 @@
+pure2-assert-expected-not-null.cpp2:7:10: error: no member named 'expected' in namespace 'std'
+    std::expected<int,bool> ex {4}; 
+    ~~~~~^
+pure2-assert-expected-not-null.cpp2:7:22: error: expected '(' for function-style cast or type construction
+    std::expected<int,bool> ex {4}; 
+                  ~~~^
+pure2-assert-expected-not-null.cpp2:9:193: error: use of undeclared identifier 'ex'
+    return *cpp2::impl::assert_not_null(cpp2::move(up)) + *cpp2::impl::assert_not_null(cpp2::move(sp)) + *cpp2::impl::assert_not_null(cpp2::move(op)) + *cpp2::impl::assert_not_null(cpp2::move(ex)); 
+                                                                                                                                                                                                ^
+pure2-assert-expected-not-null.cpp2:14:10: error: no member named 'expected' in namespace 'std'
+    std::expected<int,bool> ex {std::unexpected(false)}; 
+    ~~~~~^
+pure2-assert-expected-not-null.cpp2:14:22: error: expected '(' for function-style cast or type construction
+    std::expected<int,bool> ex {std::unexpected(false)}; 
+                  ~~~^
+pure2-assert-expected-not-null.cpp2:15:52: error: use of undeclared identifier 'ex'
+    return *cpp2::impl::assert_not_null(cpp2::move(ex)); 
+                                                   ^
+6 errors generated.
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diff --git a/regression-tests/test-results/clang-15/pure2-trailing-commas.cpp.execution b/regression-tests/test-results/clang-15-c++20-libcpp/pure2-trailing-commas.cpp.execution
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diff --git a/regression-tests/test-results/clang-15-c++20-libcpp/pure2-type-and-namespace-aliases.cpp.output b/regression-tests/test-results/clang-15-c++20-libcpp/pure2-type-and-namespace-aliases.cpp.output
new file mode 100644
index 000000000..99c308c8e
--- /dev/null
+++ b/regression-tests/test-results/clang-15-c++20-libcpp/pure2-type-and-namespace-aliases.cpp.output
@@ -0,0 +1,26 @@
+pure2-type-and-namespace-aliases.cpp2:3:61: error: no member named 'pmr' in namespace 'std'
+    template<typename T> using pmr_vec = std::vector<T,std::pmr::polymorphic_allocator<T>>;
+                                                       ~~~~~^
+pure2-type-and-namespace-aliases.cpp2:3:88: error: 'T' does not refer to a value
+    template<typename T> using pmr_vec = std::vector<T,std::pmr::polymorphic_allocator<T>>;
+                                                                                       ^
+pure2-type-and-namespace-aliases.cpp2:3:23: note: declared here
+    template<typename T> using pmr_vec = std::vector<T,std::pmr::polymorphic_allocator<T>>;
+                      ^
+pure2-type-and-namespace-aliases.cpp2:3:91: error: expected ';' after alias declaration
+    template<typename T> using pmr_vec = std::vector<T,std::pmr::polymorphic_allocator<T>>;
+                                                                                          ^
+                                                                                          ;
+pure2-type-and-namespace-aliases.cpp2:18:9: error: no member named 'pmr_vec' in namespace 'N'
+    N1::pmr_vec<myclass::str> v {"xyzzy", "plugh"}; 
+    ~~~~^
+pure2-type-and-namespace-aliases.cpp2:18:29: error: expected '(' for function-style cast or type construction
+    N1::pmr_vec<myclass::str> v {"xyzzy", "plugh"}; 
+                ~~~~~~~~~~~~^
+pure2-type-and-namespace-aliases.cpp2:18:31: error: use of undeclared identifier 'v'
+    N1::pmr_vec<myclass::str> v {"xyzzy", "plugh"}; 
+                              ^
+pure2-type-and-namespace-aliases.cpp2:20:27: error: use of undeclared identifier 'v'
+auto const& v2{cpp2::move(v)};
+                          ^
+7 errors generated.
diff --git a/regression-tests/test-results/clang-15/pure2-type-safety-1.cpp.execution b/regression-tests/test-results/clang-15-c++20-libcpp/pure2-type-safety-1.cpp.execution
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diff --git a/regression-tests/test-results/clang-15/pure2-types-down-upcast.cpp.execution b/regression-tests/test-results/clang-15-c++20-libcpp/pure2-types-down-upcast.cpp.execution
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diff --git a/regression-tests/test-results/clang-15/pure2-types-order-independence-and-nesting.cpp.execution b/regression-tests/test-results/clang-15-c++20-libcpp/pure2-types-order-independence-and-nesting.cpp.execution
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diff --git a/regression-tests/test-results/clang-15/xyzzy b/regression-tests/test-results/clang-15-c++20-libcpp/xyzzy
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diff --git a/regression-tests/test-results/clang-15-c++20/clang-version.output b/regression-tests/test-results/clang-15-c++20/clang-version.output
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index 000000000..de4f2d583
--- /dev/null
+++ b/regression-tests/test-results/clang-15-c++20/clang-version.output
@@ -0,0 +1,4 @@
+Ubuntu clang version 15.0.7
+Target: x86_64-pc-linux-gnu
+Thread model: posix
+InstalledDir: /usr/bin
diff --git a/regression-tests/test-results/gcc-10/mixed-allcpp1-hello.cpp.execution b/regression-tests/test-results/clang-15-c++20/mixed-allcpp1-hello.cpp.execution
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+Ubuntu clang version 18.1.3 (1)
+Target: x86_64-pc-linux-gnu
+Thread model: posix
+InstalledDir: /usr/bin
\ No newline at end of file
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diff --git a/regression-tests/test-results/clang-18-c++20/pure2-assert-expected-not-null.cpp.output b/regression-tests/test-results/clang-18-c++20/pure2-assert-expected-not-null.cpp.output
new file mode 100644
index 000000000..ba14d3848
--- /dev/null
+++ b/regression-tests/test-results/clang-18-c++20/pure2-assert-expected-not-null.cpp.output
@@ -0,0 +1,27 @@
+pure2-assert-expected-not-null.cpp2:7:22: error: expected '(' for function-style cast or type construction
+    7 |     std::expected<int,bool> ex {4}; 
+      |                   ~~~^
+pure2-assert-expected-not-null.cpp2:7:10: error: no member named 'expected' in namespace 'std'; did you mean 'unexpected'?
+    7 |     std::expected<int,bool> ex {4}; 
+      |     ~~~~~^~~~~~~~
+      |          unexpected
+/usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/exception:110:8: note: 'unexpected' declared here
+  110 |   void unexpected() __attribute__ ((__noreturn__,__cold__));
+      |        ^
+pure2-assert-expected-not-null.cpp2:9:193: error: use of undeclared identifier 'ex'
+    9 |     return *cpp2::impl::assert_not_null(cpp2::move(up)) + *cpp2::impl::assert_not_null(cpp2::move(sp)) + *cpp2::impl::assert_not_null(cpp2::move(op)) + *cpp2::impl::assert_not_null(cpp2::move(ex)); 
+      |                                                                                                                                                                                                 ^
+pure2-assert-expected-not-null.cpp2:14:22: error: expected '(' for function-style cast or type construction
+   14 |     std::expected<int,bool> ex {std::unexpected(false)}; 
+      |                   ~~~^
+pure2-assert-expected-not-null.cpp2:14:10: error: no member named 'expected' in namespace 'std'; did you mean 'unexpected'?
+   14 |     std::expected<int,bool> ex {std::unexpected(false)}; 
+      |     ~~~~~^~~~~~~~
+      |          unexpected
+/usr/bin/../lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/exception:110:8: note: 'unexpected' declared here
+  110 |   void unexpected() __attribute__ ((__noreturn__,__cold__));
+      |        ^
+pure2-assert-expected-not-null.cpp2:15:52: error: use of undeclared identifier 'ex'
+   15 |     return *cpp2::impl::assert_not_null(cpp2::move(ex)); 
+      |                                                    ^
+6 errors generated.
diff --git a/regression-tests/test-results/gcc-13/pure2-assert-optional-not-null.cpp.execution b/regression-tests/test-results/clang-18-c++20/pure2-assert-optional-not-null.cpp.execution
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--- /dev/null
+++ b/regression-tests/test-results/gcc-10-c++20/pure2-interpolation.cpp.execution
@@ -0,0 +1,12 @@
+g0g0g
+0g0g
+0g0
+00
+"0"
+"0
+"
+
+pl(ug$h
+0pl(ug$h
+Dog kennel           color mauve      price 3.14       in stock = true
+Dog kennel color mauve price 3.140000 in stock = true
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rename from regression-tests/test-results/msvc-2022/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.execution
rename to regression-tests/test-results/gcc-10-c++20/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.execution
diff --git a/regression-tests/test-results/gcc-10-c++20/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.output b/regression-tests/test-results/gcc-10-c++20/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.execution b/regression-tests/test-results/gcc-10-c++20/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.execution
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.execution
rename to regression-tests/test-results/gcc-10-c++20/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.execution
diff --git a/regression-tests/test-results/gcc-10-c++20/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.output b/regression-tests/test-results/gcc-10-c++20/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution b/regression-tests/test-results/gcc-10-c++20/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution
similarity index 100%
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rename to regression-tests/test-results/gcc-10-c++20/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution
diff --git a/regression-tests/test-results/gcc-10-c++20/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.output b/regression-tests/test-results/gcc-10-c++20/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.output
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index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-types-that-parameters.cpp.execution b/regression-tests/test-results/gcc-10-c++20/pure2-types-that-parameters.cpp.execution
similarity index 100%
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diff --git a/regression-tests/test-results/gcc-10-c++20/pure2-types-that-parameters.cpp.output b/regression-tests/test-results/gcc-10-c++20/pure2-types-that-parameters.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-types-value-types-via-meta-functions.cpp.execution b/regression-tests/test-results/gcc-10-c++20/pure2-types-value-types-via-meta-functions.cpp.execution
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rename from regression-tests/test-results/msvc-2022/pure2-types-value-types-via-meta-functions.cpp.execution
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diff --git a/regression-tests/test-results/gcc-10-c++20/pure2-types-value-types-via-meta-functions.cpp.output b/regression-tests/test-results/gcc-10-c++20/pure2-types-value-types-via-meta-functions.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-10-c++20/pure2-ufcs-member-access-and-chaining.cpp.execution b/regression-tests/test-results/gcc-10-c++20/pure2-ufcs-member-access-and-chaining.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-10-c++20/pure2-ufcs-member-access-and-chaining.cpp.output b/regression-tests/test-results/gcc-10-c++20/pure2-ufcs-member-access-and-chaining.cpp.output
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diff --git a/regression-tests/test-results/msvc-2022/pure2-union.cpp.execution b/regression-tests/test-results/gcc-10-c++20/pure2-union.cpp.execution
similarity index 100%
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rename to regression-tests/test-results/gcc-10-c++20/pure2-union.cpp.execution
diff --git a/regression-tests/test-results/gcc-10-c++20/pure2-union.cpp.output b/regression-tests/test-results/gcc-10-c++20/pure2-union.cpp.output
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index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-variadics.cpp.execution b/regression-tests/test-results/gcc-10-c++20/pure2-variadics.cpp.execution
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-variadics.cpp.execution
rename to regression-tests/test-results/gcc-10-c++20/pure2-variadics.cpp.execution
diff --git a/regression-tests/test-results/gcc-10-c++20/pure2-variadics.cpp.output b/regression-tests/test-results/gcc-10-c++20/pure2-variadics.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-10-c++20/pure2-various-string-literals.cpp.execution b/regression-tests/test-results/gcc-10-c++20/pure2-various-string-literals.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-10-c++20/pure2-various-string-literals.cpp.output b/regression-tests/test-results/gcc-10-c++20/pure2-various-string-literals.cpp.output
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diff --git a/regression-tests/test-results/gcc-10/run-tests-gcc-10.sh b/regression-tests/test-results/gcc-10-c++20/run-tests-gcc-10.sh
similarity index 100%
rename from regression-tests/test-results/gcc-10/run-tests-gcc-10.sh
rename to regression-tests/test-results/gcc-10-c++20/run-tests-gcc-10.sh
diff --git a/regression-tests/test-results/msvc-2022/xyzzy b/regression-tests/test-results/gcc-10-c++20/xyzzy
similarity index 100%
rename from regression-tests/test-results/msvc-2022/xyzzy
rename to regression-tests/test-results/gcc-10-c++20/xyzzy
diff --git a/regression-tests/test-results/gcc-13/gcc-version.output b/regression-tests/test-results/gcc-13-c++2b/gcc-version.output
similarity index 100%
rename from regression-tests/test-results/gcc-13/gcc-version.output
rename to regression-tests/test-results/gcc-13-c++2b/gcc-version.output
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-allcpp1-hello.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-allcpp1-hello.cpp.execution
new file mode 100644
index 000000000..802992c42
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-allcpp1-hello.cpp.execution
@@ -0,0 +1 @@
+Hello world
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-allcpp1-hello.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-allcpp1-hello.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-as-for-variant-20-types.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-as-for-variant-20-types.cpp.execution
new file mode 100644
index 000000000..5e2c9d82e
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-as-for-variant-20-types.cpp.execution
@@ -0,0 +1,60 @@
+v as X< 0> = 0
+v as X< 1> = 1
+v as X< 2> = 2
+v as X< 3> = 3
+v as X< 4> = 4
+v as X< 5> = 5
+v as X< 6> = 6
+v as X< 7> = 7
+v as X< 8> = 8
+v as X< 9> = 9
+v as X<10> = 10
+v as X<11> = 11
+v as X<12> = 12
+v as X<13> = 13
+v as X<14> = 14
+v as X<15> = 15
+v as X<16> = 16
+v as X<17> = 17
+v as X<18> = 18
+v as X<19> = 19
+as_const(v) as X< 0> = 0
+as_const(v) as X< 1> = 1
+as_const(v) as X< 2> = 2
+as_const(v) as X< 3> = 3
+as_const(v) as X< 4> = 4
+as_const(v) as X< 5> = 5
+as_const(v) as X< 6> = 6
+as_const(v) as X< 7> = 7
+as_const(v) as X< 8> = 8
+as_const(v) as X< 9> = 9
+as_const(v) as X<10> = 10
+as_const(v) as X<11> = 11
+as_const(v) as X<12> = 12
+as_const(v) as X<13> = 13
+as_const(v) as X<14> = 14
+as_const(v) as X<15> = 15
+as_const(v) as X<16> = 16
+as_const(v) as X<17> = 17
+as_const(v) as X<18> = 18
+as_const(v) as X<19> = 19
+move(v) as X< 0> = 0
+move(v) as X< 1> = 1
+move(v) as X< 2> = 2
+move(v) as X< 3> = 3
+move(v) as X< 4> = 4
+move(v) as X< 5> = 5
+move(v) as X< 6> = 6
+move(v) as X< 7> = 7
+move(v) as X< 8> = 8
+move(v) as X< 9> = 9
+move(v) as X<10> = 10
+move(v) as X<11> = 11
+move(v) as X<12> = 12
+move(v) as X<13> = 13
+move(v) as X<14> = 14
+move(v) as X<15> = 15
+move(v) as X<16> = 16
+move(v) as X<17> = 17
+move(v) as X<18> = 18
+move(v) as X<19> = 19
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-as-for-variant-20-types.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-as-for-variant-20-types.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-bounds-check.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-bounds-check.cpp.execution
new file mode 100644
index 000000000..8474b9159
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-bounds-check.cpp.execution
@@ -0,0 +1 @@
+Bounds safety violation: out of bounds access attempt detected - attempted access at index 5, [min,max] range is [0,4]
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-bounds-check.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-bounds-check.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-bounds-safety-with-assert-2.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-bounds-safety-with-assert-2.cpp.execution
new file mode 100644
index 000000000..6330ca570
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-bounds-safety-with-assert-2.cpp.execution
@@ -0,0 +1,5 @@
+1
+44
+45
+46
+5
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-bounds-safety-with-assert-2.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-bounds-safety-with-assert-2.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-bounds-safety-with-assert.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-bounds-safety-with-assert.cpp.execution
new file mode 100644
index 000000000..776dc1460
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-bounds-safety-with-assert.cpp.execution
@@ -0,0 +1 @@
+Bounds safety violation
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-bounds-safety-with-assert.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-bounds-safety-with-assert.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-bugfix-for-literal-as-nttp.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-bugfix-for-literal-as-nttp.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-bugfix-for-literal-as-nttp.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-bugfix-for-literal-as-nttp.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13/mixed-bugfix-for-ufcs-non-local.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-bugfix-for-ufcs-non-local.cpp.output
similarity index 100%
rename from regression-tests/test-results/gcc-13/mixed-bugfix-for-ufcs-non-local.cpp.output
rename to regression-tests/test-results/gcc-13-c++2b/mixed-bugfix-for-ufcs-non-local.cpp.output
diff --git a/regression-tests/test-results/msvc-2022/mixed-captures-in-expressions-and-postconditions.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-captures-in-expressions-and-postconditions.cpp.execution
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-captures-in-expressions-and-postconditions.cpp.execution
rename to regression-tests/test-results/gcc-13-c++2b/mixed-captures-in-expressions-and-postconditions.cpp.execution
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-captures-in-expressions-and-postconditions.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-captures-in-expressions-and-postconditions.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-fixed-type-aliases.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-fixed-type-aliases.cpp.execution
new file mode 100644
index 000000000..3122e6030
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-fixed-type-aliases.cpp.execution
@@ -0,0 +1,4 @@
+true
+false
+"test.exe"
+true
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-fixed-type-aliases.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-fixed-type-aliases.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-float-literals.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-float-literals.cpp.execution
new file mode 100644
index 000000000..6b15b12bc
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-float-literals.cpp.execution
@@ -0,0 +1,72 @@
+123
+123
+123
+123
+123
+123
+123456
+123
+123
+123
+123
+123
+123
+123456
+123456
+123456
+456
+456
+1e+10
+1e+10
+1e-10
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+1e-10
+1e-10
+1e-10
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+1e-10
+123456
+123456
+456
+456
+1e+10
+1e+10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+123
+123
+123
+123
+123
+123
+123456
+123
+123
+123
+123
+123
+123
+123456
+123456
+456
+1e+10
+1e+10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+123456
+456
+1e+10
+1e+10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-float-literals.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-float-literals.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-forwarding.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-forwarding.cpp.execution
new file mode 100644
index 000000000..952feac3b
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-forwarding.cpp.execution
@@ -0,0 +1,12 @@
++X 1
++X 2
+copy X 1
+copy X 2
+copy X 1
+move X 2
++X 3
++X 4
+copy X 3
+copy X 4
+move X 3
+move X 4
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-forwarding.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-forwarding.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/mixed-function-expression-and-std-for-each.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-function-expression-and-std-for-each.cpp.execution
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-function-expression-and-std-for-each.cpp.execution
rename to regression-tests/test-results/gcc-13-c++2b/mixed-function-expression-and-std-for-each.cpp.execution
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-function-expression-and-std-for-each.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-function-expression-and-std-for-each.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.execution
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.execution
rename to regression-tests/test-results/gcc-13-c++2b/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.execution
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/mixed-function-expression-and-std-ranges-for-each.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-function-expression-and-std-ranges-for-each.cpp.execution
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-function-expression-and-std-ranges-for-each.cpp.execution
rename to regression-tests/test-results/gcc-13-c++2b/mixed-function-expression-and-std-ranges-for-each.cpp.execution
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-function-expression-and-std-ranges-for-each.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-function-expression-and-std-ranges-for-each.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/mixed-function-expression-with-pointer-capture.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-function-expression-with-pointer-capture.cpp.execution
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-function-expression-with-pointer-capture.cpp.execution
rename to regression-tests/test-results/gcc-13-c++2b/mixed-function-expression-with-pointer-capture.cpp.execution
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-function-expression-with-pointer-capture.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-function-expression-with-pointer-capture.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/mixed-function-expression-with-repeated-capture.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-function-expression-with-repeated-capture.cpp.execution
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-function-expression-with-repeated-capture.cpp.execution
rename to regression-tests/test-results/gcc-13-c++2b/mixed-function-expression-with-repeated-capture.cpp.execution
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-function-expression-with-repeated-capture.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-function-expression-with-repeated-capture.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-hello.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-hello.cpp.execution
new file mode 100644
index 000000000..c8848197e
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-hello.cpp.execution
@@ -0,0 +1 @@
+Hello [world]
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-hello.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-hello.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-increment-decrement.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-increment-decrement.cpp.execution
new file mode 100644
index 000000000..6f42aeb32
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-increment-decrement.cpp.execution
@@ -0,0 +1,2 @@
+12234
+12234
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-increment-decrement.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-increment-decrement.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-initialization-safety-3-contract-violation.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-initialization-safety-3-contract-violation.cpp.execution
new file mode 100644
index 000000000..e16104fe5
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-initialization-safety-3-contract-violation.cpp.execution
@@ -0,0 +1 @@
+Contract violation: fill: value must contain at least count elements
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-initialization-safety-3-contract-violation.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-initialization-safety-3-contract-violation.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-initialization-safety-3.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-initialization-safety-3.cpp.execution
new file mode 100644
index 000000000..b261dd86c
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-initialization-safety-3.cpp.execution
@@ -0,0 +1 @@
+>> [xyzzy]
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-initialization-safety-3.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-initialization-safety-3.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-inspect-templates.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-inspect-templates.cpp.execution
new file mode 100644
index 000000000..03cdf50b7
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-inspect-templates.cpp.execution
@@ -0,0 +1,8 @@
+inspected vec : std::vector
+inspected arr : std::array
+inspected var : std::variant
+inspected myt : my_type
+inspected vec : std::vector
+inspected arr : std::array
+inspected var : std::variant
+inspected myt : my_type
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-inspect-templates.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-inspect-templates.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-inspect-values-2.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-inspect-values-2.cpp.execution
new file mode 100644
index 000000000..8372eadca
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-inspect-values-2.cpp.execution
@@ -0,0 +1,5 @@
+i is between 11 and 20
+less than 20
+i is between 10 and 30
+v is empty
+v is empty
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-inspect-values-2.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-inspect-values-2.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-inspect-values.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-inspect-values.cpp.execution
new file mode 100644
index 000000000..e7130e0f8
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-inspect-values.cpp.execution
@@ -0,0 +1,12 @@
+rev dodgson
+(no match)
+the answer
+zero
+plugh
+zero
+1 or 2
+1 or 2
+3
+integer -42
+xyzzy
+(no match)
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-inspect-values.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-inspect-values.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-inspect-with-typeof-of-template-arg-list.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-inspect-with-typeof-of-template-arg-list.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-inspect-with-typeof-of-template-arg-list.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-inspect-with-typeof-of-template-arg-list.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-intro-example-three-loops.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-intro-example-three-loops.cpp.execution
new file mode 100644
index 000000000..984a60a83
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-intro-example-three-loops.cpp.execution
@@ -0,0 +1,7 @@
+>> hello
+>> big
+>> world
+  **  **  **
+>> [hello]
+>> [big]
+>> [world]
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-intro-example-three-loops.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-intro-example-three-loops.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-intro-for-with-counter-include-last.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-intro-for-with-counter-include-last.cpp.execution
new file mode 100644
index 000000000..05961867a
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-intro-for-with-counter-include-last.cpp.execution
@@ -0,0 +1,5 @@
+1 42
+2 84
+3 168
+4 336
+5 672
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-intro-for-with-counter-include-last.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-intro-for-with-counter-include-last.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-lifetime-safety-and-null-contracts.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-lifetime-safety-and-null-contracts.cpp.execution
new file mode 100644
index 000000000..f4dd62312
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-lifetime-safety-and-null-contracts.cpp.execution
@@ -0,0 +1 @@
+sending error to my framework... [dynamic null dereference attempt detected]
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-lifetime-safety-and-null-contracts.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-lifetime-safety-and-null-contracts.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-lifetime-safety-pointer-init-4.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-lifetime-safety-pointer-init-4.cpp.execution
new file mode 100644
index 000000000..7ee4d37b2
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-lifetime-safety-pointer-init-4.cpp.execution
@@ -0,0 +1 @@
+>> 42
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-lifetime-safety-pointer-init-4.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-lifetime-safety-pointer-init-4.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-multiple-return-values.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-multiple-return-values.cpp.execution
new file mode 100644
index 000000000..b3fc65a7c
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-multiple-return-values.cpp.execution
@@ -0,0 +1,2 @@
+a is 10
+b is xyzzy
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-multiple-return-values.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-multiple-return-values.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-out-destruction.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-out-destruction.cpp.execution
new file mode 100644
index 000000000..df8e3e4ff
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-out-destruction.cpp.execution
@@ -0,0 +1,21 @@
+enter main
+enter f00
+enter f01
++X 1
+exit f01
+-X 1
+exit f00
+
+enter f10
+enter f11
+enter f12
+enter f13
+enter f14
++X 2
+exit f14
+exit f13
+exit f12
+-X 2
+exit f11
+exit f10
+exit main
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-out-destruction.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-out-destruction.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-parameter-passing-generic-out.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-parameter-passing-generic-out.cpp.execution
new file mode 100644
index 000000000..982a789cf
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-parameter-passing-generic-out.cpp.execution
@@ -0,0 +1,2 @@
+42
+exxxx
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-parameter-passing-generic-out.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-parameter-passing-generic-out.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-parameter-passing-with-forward.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-parameter-passing-with-forward.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-parameter-passing-with-forward.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-parameter-passing-with-forward.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-parameter-passing.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-parameter-passing.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-parameter-passing.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-parameter-passing.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-postexpression-with-capture.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-postexpression-with-capture.cpp.execution
new file mode 100644
index 000000000..a17035eda
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-postexpression-with-capture.cpp.execution
@@ -0,0 +1,2 @@
+xyzzy and plugh
+xyzzyplugh
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-postexpression-with-capture.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-postexpression-with-capture.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-postfix-expression-custom-formatting.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-postfix-expression-custom-formatting.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-postfix-expression-custom-formatting.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-postfix-expression-custom-formatting.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-string-interpolation.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-string-interpolation.cpp.execution
new file mode 100644
index 000000000..eebb290a9
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-string-interpolation.cpp.execution
@@ -0,0 +1,17 @@
+a = 2, b = (empty)
+a^2 + b = 46
+sv = my string_view
+osv = (empty)
+osv = string literal bound to optional string_view
+var = (empty)
+var = abracadabra
+var = 2.718280
+mypair = (12, 3.400000)
+tup1 = (12)
+tup2 = (12, 3.400000)
+tup3 = (12, 3.400000, 456)
+p = (first, (empty))
+t = (3.140000, (empty), (empty))
+vv = 0
+vv = (1, 2.300000)
+custom = (customize me - no cpp2::to_string overload exists for this type)
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-string-interpolation.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-string-interpolation.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-test-parens.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-test-parens.cpp.execution
new file mode 100644
index 000000000..59967f29d
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-test-parens.cpp.execution
@@ -0,0 +1,3 @@
+11
+12
+13*14 is 182
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-test-parens.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-test-parens.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-type-safety-1.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-type-safety-1.cpp.execution
new file mode 100644
index 000000000..f1a0d084e
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-type-safety-1.cpp.execution
@@ -0,0 +1,6 @@
+1.1 is int? false
+1   is int? true
+
+s* is Shape?  true
+s* is Circle? true
+s* is Square? false
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-type-safety-1.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-type-safety-1.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-ufcs-multiple-template-arguments.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/mixed-ufcs-multiple-template-arguments.cpp.execution
new file mode 100644
index 000000000..dec75369f
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/mixed-ufcs-multiple-template-arguments.cpp.execution
@@ -0,0 +1,2 @@
+rain
+rain
diff --git a/regression-tests/test-results/gcc-13-c++2b/mixed-ufcs-multiple-template-arguments.cpp.output b/regression-tests/test-results/gcc-13-c++2b/mixed-ufcs-multiple-template-arguments.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13/pure2-assert-expected-not-null.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-assert-expected-not-null.cpp.execution
similarity index 100%
rename from regression-tests/test-results/gcc-13/pure2-assert-expected-not-null.cpp.execution
rename to regression-tests/test-results/gcc-13-c++2b/pure2-assert-expected-not-null.cpp.execution
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-assert-expected-not-null.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-assert-expected-not-null.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-assert-optional-not-null.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-assert-optional-not-null.cpp.execution
new file mode 100644
index 000000000..c6aeba0fd
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-assert-optional-not-null.cpp.execution
@@ -0,0 +1 @@
+Null safety violation: std::optional does not contain a value
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-assert-optional-not-null.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-assert-optional-not-null.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-assert-shared-ptr-not-null.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-assert-shared-ptr-not-null.cpp.execution
new file mode 100644
index 000000000..85aafbe6a
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-assert-shared-ptr-not-null.cpp.execution
@@ -0,0 +1 @@
+Null safety violation: std::shared_ptr is empty
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-assert-shared-ptr-not-null.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-assert-shared-ptr-not-null.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-assert-unique-ptr-not-null.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-assert-unique-ptr-not-null.cpp.execution
new file mode 100644
index 000000000..af633d171
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-assert-unique-ptr-not-null.cpp.execution
@@ -0,0 +1 @@
+Null safety violation: std::unique_ptr is empty
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-assert-unique-ptr-not-null.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-assert-unique-ptr-not-null.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bounds-safety-span.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-bounds-safety-span.cpp.execution
new file mode 100644
index 000000000..3a0304fa2
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-bounds-safety-span.cpp.execution
@@ -0,0 +1,3 @@
+>> decorated
+>> hello
+>> world
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bounds-safety-span.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-bounds-safety-span.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-break-continue.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-break-continue.cpp.execution
new file mode 100644
index 000000000..c8af55771
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-break-continue.cpp.execution
@@ -0,0 +1,26 @@
+while_continue_inner:
+  00 inner 01 02 inner outer 10 inner 11 12 inner outer 20 inner 21 22 inner outer 
+while_continue_outer:
+  00 inner 01 10 inner 11 20 inner 21 
+while_break_inner:
+  00 inner 01 outer 10 inner 11 outer 20 inner 21 outer 
+while_break_outer:
+  00 inner 01 
+
+do_continue_inner:
+  00 inner 01 02 inner outer 10 inner 11 12 inner outer 20 inner 21 22 inner outer 
+do_continue_outer:
+  00 inner 01 10 inner 11 20 inner 21 
+do_break_inner:
+  00 inner 01 outer 10 inner 11 outer 20 inner 21 outer 
+do_break_outer:
+  00 inner 01 
+
+for_continue_inner:
+  00 inner 01 02 inner outer 10 inner 11 12 inner outer 20 inner 21 22 inner outer 
+for_continue_outer:
+  00 inner 01 10 inner 11 20 inner 21 
+for_break_inner:
+  00 inner 01 outer 10 inner 11 outer 20 inner 21 outer 
+for_break_outer:
+  00 inner 01 
\ No newline at end of file
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-break-continue.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-break-continue.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-assign-expression-list.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-assign-expression-list.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-assign-expression-list.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-assign-expression-list.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-discard-precedence.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-discard-precedence.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-discard-precedence.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-discard-precedence.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-empty-index.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-empty-index.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-indexed-call.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-indexed-call.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-indexed-call.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-indexed-call.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-max-munch.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-max-munch.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-max-munch.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-max-munch.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-memberwise-base-assignment.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-memberwise-base-assignment.cpp.execution
new file mode 100644
index 000000000..566837e51
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-memberwise-base-assignment.cpp.execution
@@ -0,0 +1,2 @@
+(out this, that)
+(out this, that)
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-memberwise-base-assignment.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-memberwise-base-assignment.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-name-lookup-and-value-decoration.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-name-lookup-and-value-decoration.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-name-lookup-and-value-decoration.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-name-lookup-and-value-decoration.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-non-local-function-expression.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-non-local-function-expression.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13/pure2-bugfix-for-non-local-function-expression.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-non-local-function-expression.cpp.output
similarity index 100%
rename from regression-tests/test-results/gcc-13/pure2-bugfix-for-non-local-function-expression.cpp.output
rename to regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-non-local-function-expression.cpp.output
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-non-local-initialization.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-non-local-initialization.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-non-local-initialization.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-non-local-initialization.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-optional-template-argument-list.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-optional-template-argument-list.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-optional-template-argument-list.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-optional-template-argument-list.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-requires-clause-in-forward-declaration.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-requires-clause-in-forward-declaration.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-requires-clause-in-forward-declaration.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-requires-clause-in-forward-declaration.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-requires-clause-unbraced-function-initializer.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-requires-clause-unbraced-function-initializer.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-requires-clause-unbraced-function-initializer.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-requires-clause-unbraced-function-initializer.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-template-argument.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-template-argument.cpp.execution
new file mode 100644
index 000000000..c508d5366
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-template-argument.cpp.execution
@@ -0,0 +1 @@
+false
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-template-argument.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-template-argument.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-ufcs-arguments.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-ufcs-arguments.cpp.execution
new file mode 100644
index 000000000..0e41b7819
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-ufcs-arguments.cpp.execution
@@ -0,0 +1,4 @@
+0123456789
+9
+0123456789
+9
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-ufcs-arguments.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-ufcs-arguments.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-ufcs-name-lookup.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-ufcs-name-lookup.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-ufcs-name-lookup.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-ufcs-name-lookup.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-ufcs-noexcept.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-ufcs-noexcept.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-ufcs-noexcept.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-ufcs-noexcept.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-ufcs-sfinae.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-ufcs-sfinae.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-ufcs-sfinae.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-ufcs-sfinae.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-unbraced-function-expression.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-unbraced-function-expression.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-unbraced-function-expression.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-unbraced-function-expression.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-variable-template.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-variable-template.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-variable-template.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-bugfix-for-variable-template.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-chained-comparisons.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-chained-comparisons.cpp.execution
new file mode 100644
index 000000000..b41a1bf75
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-chained-comparisons.cpp.execution
@@ -0,0 +1,27 @@
+0 0 0: true false false
+0 0 1: false false false
+0 0 2: false false false
+0 1 0: false false false
+0 1 1: false true false
+0 1 2: false true false
+0 2 0: false false false
+0 2 1: false false false
+0 2 2: false true false
+1 0 0: false false false
+1 0 1: false false false
+1 0 2: false false false
+1 1 0: false false true
+1 1 1: true false false
+1 1 2: false false false
+1 2 0: false false false
+1 2 1: false false false
+1 2 2: false true false
+2 0 0: false false false
+2 0 1: false false false
+2 0 2: false false false
+2 1 0: false false true
+2 1 1: false false false
+2 1 2: false false false
+2 2 0: false false true
+2 2 1: false false true
+2 2 2: true false false
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-chained-comparisons.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-chained-comparisons.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-concept-definition.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-concept-definition.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-concept-definition.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-concept-definition.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-contracts.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-contracts.cpp.execution
new file mode 100644
index 000000000..e8a01cd98
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-contracts.cpp.execution
@@ -0,0 +1,3 @@
+1
+2
+4
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-contracts.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-contracts.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-defaulted-comparisons-and-final-types.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-defaulted-comparisons-and-final-types.cpp.execution
new file mode 100644
index 000000000..9ff824547
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-defaulted-comparisons-and-final-types.cpp.execution
@@ -0,0 +1 @@
+less
\ No newline at end of file
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-defaulted-comparisons-and-final-types.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-defaulted-comparisons-and-final-types.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-enum.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-enum.cpp.execution
new file mode 100644
index 000000000..6d9a33c28
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-enum.cpp.execution
@@ -0,0 +1,29 @@
+x.to_string() is clubs
+x2.to_string() is clubs
+with if else: clubs
+with inspect: clubs
+
+file_attributes::cached.get_raw_value() is 1
+file_attributes::current.get_raw_value() is 2
+file_attributes::obsolete.get_raw_value() is 4
+file_attributes::cached_and_current.get_raw_value() is 3
+f. get_raw_value() is 1
+f2.get_raw_value() is 1
+f  is (cached)
+f2 is (cached)
+f2 is (none)
+f2 is (cached)
+f. get_raw_value() is 1
+f2.get_raw_value() is 1
+f  is (f2) is true
+f2 is (f ) is true
+
+f  is (cached, current, obsolete, cached_and_current)
+f2 is (cached, current, cached_and_current)
+f. get_raw_value() is 7
+f2.get_raw_value() is 3
+f  == f2   is false
+f  is (f2) is false
+f2 is (f ) is false
+(f & f2) == f2 is true
+inspecting f: includes all f2's flags ('cached' and 'current')
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-enum.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-enum.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-for-loop-range-with-lambda.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-for-loop-range-with-lambda.cpp.execution
new file mode 100644
index 000000000..19b3a90b2
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-for-loop-range-with-lambda.cpp.execution
@@ -0,0 +1 @@
+12345123451234512345
\ No newline at end of file
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-for-loop-range-with-lambda.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-for-loop-range-with-lambda.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-forward-return.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-forward-return.cpp.execution
new file mode 100644
index 000000000..f259f2362
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-forward-return.cpp.execution
@@ -0,0 +1,2 @@
+4
+42
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-forward-return.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-forward-return.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-function-multiple-forward-arguments.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-function-multiple-forward-arguments.cpp.execution
new file mode 100644
index 000000000..8baef1b4a
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-function-multiple-forward-arguments.cpp.execution
@@ -0,0 +1 @@
+abc
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-function-multiple-forward-arguments.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-function-multiple-forward-arguments.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-hello.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-hello.cpp.execution
new file mode 100644
index 000000000..c8848197e
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-hello.cpp.execution
@@ -0,0 +1 @@
+Hello [world]
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-hello.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-hello.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-initialization-safety-with-else-if.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-initialization-safety-with-else-if.cpp.execution
new file mode 100644
index 000000000..d00491fd7
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-initialization-safety-with-else-if.cpp.execution
@@ -0,0 +1 @@
+1
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-initialization-safety-with-else-if.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-initialization-safety-with-else-if.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-inspect-expression-in-generic-function-multiple-types.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-inspect-expression-in-generic-function-multiple-types.cpp.execution
new file mode 100644
index 000000000..fd5a6cdff
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-inspect-expression-in-generic-function-multiple-types.cpp.execution
@@ -0,0 +1,8 @@
+                        double value is not an int or string
+     variant<int, int, double> value is not an int or string
+                           any value is "xyzzy"
+                 optional<int> value is not an int or string
+                           int value is integer 42
+     variant<int, int, double> value is integer 1
+                           any value is integer 2
+                 optional<int> value is integer 3
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-inspect-expression-in-generic-function-multiple-types.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-inspect-expression-in-generic-function-multiple-types.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-inspect-expression-with-as-in-generic-function.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-inspect-expression-with-as-in-generic-function.cpp.execution
new file mode 100644
index 000000000..3cd874b4e
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-inspect-expression-with-as-in-generic-function.cpp.execution
@@ -0,0 +1,3 @@
+                        syzygy value is not an int
+                             1 value is 1
+                      1.100000 value is not an int
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-inspect-expression-with-as-in-generic-function.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-inspect-expression-with-as-in-generic-function.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-inspect-fallback-with-variant-any-optional.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-inspect-fallback-with-variant-any-optional.cpp.execution
new file mode 100644
index 000000000..a5cbcefe9
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-inspect-fallback-with-variant-any-optional.cpp.execution
@@ -0,0 +1,11 @@
+
+All these cases satisfy "matches std::string"
+
+variant<int, int, string>
+    ... matches std::string
+
+string
+    ... matches std::string
+
+optional<string>
+    ... matches std::string
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-inspect-fallback-with-variant-any-optional.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-inspect-fallback-with-variant-any-optional.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.execution
new file mode 100644
index 000000000..a2df8769d
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.execution
@@ -0,0 +1,17 @@
+
+All these cases satisfy "VOYDE AND EMPTIE"
+
+unique_ptr
+    ... VOYDE AND EMPTIE
+
+vector<int>::iterator
+    ... VOYDE AND EMPTIE
+
+variant<monostate, int, int, string>
+    ... VOYDE AND EMPTIE
+
+any
+    ... VOYDE AND EMPTIE
+
+optional<string>
+    ... VOYDE AND EMPTIE
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-interpolation.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-interpolation.cpp.execution
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-interpolation.cpp.execution
rename to regression-tests/test-results/gcc-13-c++2b/pure2-interpolation.cpp.execution
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-interpolation.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-interpolation.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-intro-example-hello-2022.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-intro-example-hello-2022.cpp.execution
new file mode 100644
index 000000000..8e8c5ee29
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-intro-example-hello-2022.cpp.execution
@@ -0,0 +1,2 @@
+>> [hello] - length 7
+>> [2022] - length 6
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-intro-example-hello-2022.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-intro-example-hello-2022.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-intro-example-three-loops.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-intro-example-three-loops.cpp.execution
new file mode 100644
index 000000000..c218d85df
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-intro-example-three-loops.cpp.execution
@@ -0,0 +1,8 @@
+>> hello
+>> big
+>> world
+  **  **  **
+>> [hello]
+>> [big]
+>> [world]
+>> end of program
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-intro-example-three-loops.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-intro-example-three-loops.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-is-with-free-functions-predicate.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-is-with-free-functions-predicate.cpp.execution
new file mode 100644
index 000000000..c8a07e430
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-is-with-free-functions-predicate.cpp.execution
@@ -0,0 +1,6 @@
+3.140000 is double bigger than 3
+3.140000 is bigger than 3
+42 is integer bigger than 3
+42 is bigger than 3
+a is integer bigger than 3
+a is bigger than 3
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-is-with-free-functions-predicate.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-is-with-free-functions-predicate.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-is-with-unnamed-predicates.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-is-with-unnamed-predicates.cpp.execution
new file mode 100644
index 000000000..c8a07e430
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-is-with-unnamed-predicates.cpp.execution
@@ -0,0 +1,6 @@
+3.140000 is double bigger than 3
+3.140000 is bigger than 3
+42 is integer bigger than 3
+42 is bigger than 3
+a is integer bigger than 3
+a is bigger than 3
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-is-with-unnamed-predicates.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-is-with-unnamed-predicates.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-is-with-variable-and-value.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-is-with-variable-and-value.cpp.execution
new file mode 100644
index 000000000..a9bc0680a
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-is-with-variable-and-value.cpp.execution
@@ -0,0 +1,9 @@
+3.14: unknown
+42: 42
+WithOp(): unknown
+WithGenOp(): unknown
+Cmp(): comparable
+std::string("text"): text
+"text": text
+std::string_view("text"): text
+:std::vector = ('t','e','x','t','\0'): unknown
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-is-with-variable-and-value.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-is-with-variable-and-value.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-last-use.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-last-use.cpp.execution
new file mode 100644
index 000000000..4632e068d
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-last-use.cpp.execution
@@ -0,0 +1 @@
+123456
\ No newline at end of file
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-last-use.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-last-use.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-look-up-parameter-across-unnamed-function.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-look-up-parameter-across-unnamed-function.cpp.execution
new file mode 100644
index 000000000..871727de1
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-look-up-parameter-across-unnamed-function.cpp.execution
@@ -0,0 +1 @@
+84
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-look-up-parameter-across-unnamed-function.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-look-up-parameter-across-unnamed-function.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-main-args.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-main-args.cpp.execution
new file mode 100644
index 000000000..bd992e432
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-main-args.cpp.execution
@@ -0,0 +1,2 @@
+args.argc            is 1
+args.argv[0]         is test.exe
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-main-args.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-main-args.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-more-wildcards.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-more-wildcards.cpp.execution
new file mode 100644
index 000000000..e37d6cb21
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-more-wildcards.cpp.execution
@@ -0,0 +1,2 @@
+yes, less
+yes, always
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-more-wildcards.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-more-wildcards.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-print.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-print.cpp.execution
new file mode 100644
index 000000000..4e4b4573d
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-print.cpp.execution
@@ -0,0 +1,2 @@
+43
+forty-and-three
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-print.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-print.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-raw-string-literal-and-interpolation.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-raw-string-literal-and-interpolation.cpp.execution
new file mode 100644
index 000000000..c48e2bd60
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-raw-string-literal-and-interpolation.cpp.execution
@@ -0,0 +1,17 @@
+this is a string
+raw string without interpolation
+this is raw string literal
+
+that can last for multiple
+
+lines
+this is raw string literal
+that can last for multiple
+lines
+42 R"(this can be added too)"
+calculations like m["one"] + m["two"] = 3 also works
+at the beginning of the line!!!
+
+
+    4242
+1.2.0.42
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-raw-string-literal-and-interpolation.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-raw-string-literal-and-interpolation.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-repeated-call.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-repeated-call.cpp.execution
new file mode 100644
index 000000000..d81cc0710
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-repeated-call.cpp.execution
@@ -0,0 +1 @@
+42
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-repeated-call.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-repeated-call.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-requires-clauses.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-requires-clauses.cpp.execution
new file mode 100644
index 000000000..105d7d9ad
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-requires-clauses.cpp.execution
@@ -0,0 +1 @@
+100
\ No newline at end of file
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-requires-clauses.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-requires-clauses.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-return-tuple-operator.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-return-tuple-operator.cpp.execution
new file mode 100644
index 000000000..a3b7f9a55
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-return-tuple-operator.cpp.execution
@@ -0,0 +1,3 @@
+12 , 34
+23 , 45
+34 , 56
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-return-tuple-operator.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-return-tuple-operator.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-statement-scope-parameters.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-statement-scope-parameters.cpp.execution
new file mode 100644
index 000000000..6fe5c7f6a
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-statement-scope-parameters.cpp.execution
@@ -0,0 +1,2 @@
+42
+43
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-statement-scope-parameters.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-statement-scope-parameters.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-stdio-with-raii.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-stdio-with-raii.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-stdio-with-raii.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-stdio-with-raii.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-stdio.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-stdio.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-stdio.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-stdio.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-synthesize-rightshift-and-rightshifteq.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-synthesize-rightshift-and-rightshifteq.cpp.execution
new file mode 100644
index 000000000..b8626c4cf
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-synthesize-rightshift-and-rightshifteq.cpp.execution
@@ -0,0 +1 @@
+4
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-synthesize-rightshift-and-rightshifteq.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-synthesize-rightshift-and-rightshifteq.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-template-parameter-lists.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-template-parameter-lists.cpp.execution
new file mode 100644
index 000000000..2861a7a20
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-template-parameter-lists.cpp.execution
@@ -0,0 +1,4 @@
+f1: 2
+f2: 4
+f3: 6
+f4: 8
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-template-parameter-lists.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-template-parameter-lists.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-trailing-commas.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-trailing-commas.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-trailing-commas.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-trailing-commas.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-type-and-namespace-aliases.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-type-and-namespace-aliases.cpp.execution
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-type-and-namespace-aliases.cpp.execution
rename to regression-tests/test-results/gcc-13-c++2b/pure2-type-and-namespace-aliases.cpp.execution
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-type-and-namespace-aliases.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-type-and-namespace-aliases.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-type-safety-1.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-type-safety-1.cpp.execution
new file mode 100644
index 000000000..d1aa6265a
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-type-safety-1.cpp.execution
@@ -0,0 +1,9 @@
+                         double is int? false
+      variant<int, int, double> is int? false
+                            any is int? false
+                  optional<int> is int? false
+
+                            int is int? true
+      variant<int, int, double> is int? true
+                            any is int? true
+                  optional<int> is int? true
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-type-safety-1.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-type-safety-1.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-type-safety-2-with-inspect-expression.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-type-safety-2-with-inspect-expression.cpp.execution
new file mode 100644
index 000000000..7045a6e79
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-type-safety-2-with-inspect-expression.cpp.execution
@@ -0,0 +1,8 @@
+                        double value is not an int
+     variant<int, double, int> value is not an int
+                           any value is not an int
+                 optional<int> value is not an int
+                           int value is 42
+     variant<int, double, int> value is 1
+                           any value is 2
+                 optional<int> value is 3
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-type-safety-2-with-inspect-expression.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-type-safety-2-with-inspect-expression.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-basics.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-types-basics.cpp.execution
new file mode 100644
index 000000000..96b31fc42
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-types-basics.cpp.execution
@@ -0,0 +1,27 @@
+myclass: implicit from int
+    data: 1, more: 504
+N::myclass::f with 53
+N::myclass::nested::g
+f1: 2
+f2: 4
+f3: 6
+f4: 8
+myclass: explicit from string
+    data: 99, more: abracadabra
+myclass: default
+    data: 504, more: 3.141590
+myclass: from int and string
+    data: 77, more: hair1 plugh
+x's state before assignments:     data: 1, more: 504
+myclass: implicit from int
+    data: 84, more: 504
+myclass: explicit from string
+    data: 99, more: syzygy
+myclass: implicit from int
+    data: 84, more: 504
+myclass: explicit from string
+    data: 99, more: syzygy
+myclass: destructor
+myclass: destructor
+myclass: destructor
+myclass: destructor
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-basics.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-types-basics.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-down-upcast.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-types-down-upcast.cpp.execution
new file mode 100644
index 000000000..20751af06
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-types-down-upcast.cpp.execution
@@ -0,0 +1,24 @@
+const foo 
+const foo 
+const foo 
+const foo 
+foo 
+foo 
+Call B const: 0.000000
+Call B const: 0.000000
+Call A const: 0
+Call B const: 0.000000
+Call B const: 0.000000
+Call A const: 0
+Call B mut: 0.000000
+Call B mut: 0.000000
+Call A mut: 0
+Call A const: 0
+Call B const: 0.000000
+Call A const: 0
+Call A const: 0
+Call B const: 0.000000
+Call A const: 0
+Call A mut: 0
+Call B mut: 0.000000
+Call A mut: 0
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-down-upcast.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-types-down-upcast.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-inheritance.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-types-inheritance.cpp.execution
new file mode 100644
index 000000000..809430aaa
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-types-inheritance.cpp.execution
@@ -0,0 +1,5 @@
+Parsnip checks in for the day's shift
+printing: Parsnip lives at 123 Main St.
+-> [vcall: make_speak] Parsnip cracks a few jokes with a coworker
+-> [vcall: do_work] Parsnip carries some half-tonne crates of Fe2O3 to cold storage
+Tired but satisfied after another successful day, Parsnip checks out and goes home to their family
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-inheritance.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-types-inheritance.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-order-independence-and-nesting.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-types-order-independence-and-nesting.cpp.execution
new file mode 100644
index 000000000..cc716cc8c
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-types-order-independence-and-nesting.cpp.execution
@@ -0,0 +1,5 @@
+made a safely initialized cycle
+leaving call to 'why(5)'
+leaving call to 'why(3)'
+leaving call to 'why(1)'
+hallo welt
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-order-independence-and-nesting.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-types-order-independence-and-nesting.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-ordering-via-meta-functions.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-types-ordering-via-meta-functions.cpp.execution
new file mode 100644
index 000000000..54b3aab09
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-types-ordering-via-meta-functions.cpp.execution
@@ -0,0 +1 @@
+less more less
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-ordering-via-meta-functions.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-types-ordering-via-meta-functions.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-1-provide-everything.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-1-provide-everything.cpp.execution
new file mode 100644
index 000000000..fc5a23bde
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-1-provide-everything.cpp.execution
@@ -0,0 +1,8 @@
+Function invoked        Call syntax   Results
+----------------------  ------------  ------------------------------------------------------
+ctor - from string      construct     [ Henry | 123 Ford Dr. ]
+ctor - from string      assign        [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   cp-construct  [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - move             mv-construct  [ Clara(CM) | 123 Ford Dr. ] <- [  |  ]
+assign - copy           cp-assign     [ Clara | 123 Ford Dr.(AC) ] <- [ Clara | 123 Ford Dr. ]
+assign - move           mv-assign     [ Clara | 123 Ford Dr. ] <- [  |  ]
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-1-provide-everything.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-1-provide-everything.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.execution
new file mode 100644
index 000000000..7cbf0f869
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.execution
@@ -0,0 +1,8 @@
+Function invoked        Call syntax   Results
+----------------------  ------------  ------------------------------------------------------
+ctor - from string      construct     [ Henry | 123 Ford Dr. ]
+ctor - from string      assign        [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   cp-construct  [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - move             mv-construct  [ Clara(CM) | 123 Ford Dr. ] <- [  |  ]
+assign - copy           cp-assign     [ Clara | 123 Ford Dr.(AC) ] <- [ Clara | 123 Ford Dr. ]
+assign - copy           mv-assign     [ Clara | 123 Ford Dr.(AC) ] <- [  |  ]
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.execution
new file mode 100644
index 000000000..541b2a0d9
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.execution
@@ -0,0 +1,8 @@
+Function invoked        Call syntax   Results
+----------------------  ------------  ------------------------------------------------------
+ctor - from string      construct     [ Henry | 123 Ford Dr. ]
+ctor - from string      assign        [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   cp-construct  [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - move             mv-construct  [ Clara(CM) | 123 Ford Dr. ] <- [  |  ]
+ctor - copy (GENERAL)   cp-assign     [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+assign - move           mv-assign     [ Clara | 123 Ford Dr. ] <- [  |  ]
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.execution
new file mode 100644
index 000000000..24d4e763a
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.execution
@@ -0,0 +1,8 @@
+Function invoked        Call syntax   Results
+----------------------  ------------  ------------------------------------------------------
+ctor - from string      construct     [ Henry | 123 Ford Dr. ]
+ctor - from string      assign        [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   cp-construct  [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   mv-construct  [ Clara | 123 Ford Dr. ] <- [  |  ]
+assign - copy           cp-assign     [ Clara | 123 Ford Dr.(AC) ] <- [ Clara | 123 Ford Dr. ]
+assign - move           mv-assign     [ Clara | 123 Ford Dr. ] <- [  |  ]
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution
new file mode 100644
index 000000000..c387c0371
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution
@@ -0,0 +1,8 @@
+Function invoked        Call syntax   Results
+----------------------  ------------  ------------------------------------------------------
+ctor - from string      construct     [ Henry | 123 Ford Dr. ]
+ctor - from string      assign        [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   cp-construct  [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   mv-construct  [ Clara | 123 Ford Dr. ] <- [  |  ]
+ctor - copy (GENERAL)   cp-assign     [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   mv-assign     [ Clara | 123 Ford Dr. ] <- [  |  ]
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-that-parameters.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-types-that-parameters.cpp.execution
new file mode 100644
index 000000000..abd49e623
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-types-that-parameters.cpp.execution
@@ -0,0 +1,7 @@
+name 'Henry', addr '123 Ford Dr.'
+-----
+name 'Henry', addr '123 Ford Dr.'
+name 'Henry', addr '123 Ford Dr.'
+-----
+name '', addr ''
+name 'Henry', addr '123 Ford Dr.'
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-that-parameters.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-types-that-parameters.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-value-types-via-meta-functions.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-types-value-types-via-meta-functions.cpp.execution
new file mode 100644
index 000000000..daee7bf51
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-types-value-types-via-meta-functions.cpp.execution
@@ -0,0 +1 @@
+less less less 
\ No newline at end of file
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-types-value-types-via-meta-functions.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-types-value-types-via-meta-functions.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-ufcs-member-access-and-chaining.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-ufcs-member-access-and-chaining.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-ufcs-member-access-and-chaining.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-ufcs-member-access-and-chaining.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-union.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-union.cpp.execution
new file mode 100644
index 000000000..e52daad8e
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-union.cpp.execution
@@ -0,0 +1,4 @@
+sizeof(x) - alignof(x) == max(sizeof(fields)) is true
+(not a name)
+xyz
+42
\ No newline at end of file
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-union.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-union.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-variadics.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-variadics.cpp.execution
new file mode 100644
index 000000000..53bc692f9
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/pure2-variadics.cpp.execution
@@ -0,0 +1,7 @@
+xyz
+plu
+abr
+3.14word-1500
+first all() returned false
+second all() returned true
+sum of (1, 2, 3, 100) is: 106
\ No newline at end of file
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-variadics.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-variadics.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-various-string-literals.cpp.execution b/regression-tests/test-results/gcc-13-c++2b/pure2-various-string-literals.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13-c++2b/pure2-various-string-literals.cpp.output b/regression-tests/test-results/gcc-13-c++2b/pure2-various-string-literals.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-13/run-tests-gcc-13.sh b/regression-tests/test-results/gcc-13-c++2b/run-tests-gcc-13.sh
similarity index 100%
rename from regression-tests/test-results/gcc-13/run-tests-gcc-13.sh
rename to regression-tests/test-results/gcc-13-c++2b/run-tests-gcc-13.sh
diff --git a/regression-tests/test-results/gcc-13-c++2b/xyzzy b/regression-tests/test-results/gcc-13-c++2b/xyzzy
new file mode 100644
index 000000000..805bcb853
--- /dev/null
+++ b/regression-tests/test-results/gcc-13-c++2b/xyzzy
@@ -0,0 +1 @@
+Hello Fred with UFCS!
\ No newline at end of file
diff --git a/regression-tests/test-results/gcc-14-c++2b/gcc-version.output b/regression-tests/test-results/gcc-14-c++2b/gcc-version.output
new file mode 100644
index 000000000..10159098f
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/gcc-version.output
@@ -0,0 +1,4 @@
+g++-14 (Ubuntu 14-20240412-0ubuntu1) 14.0.1 20240412 (experimental) [master r14-9935-g67e1433a94f]
+Copyright (C) 2024 Free Software Foundation, Inc.
+This is free software; see the source for copying conditions.  There is NO
+warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-allcpp1-hello.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-allcpp1-hello.cpp.execution
new file mode 100644
index 000000000..802992c42
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-allcpp1-hello.cpp.execution
@@ -0,0 +1 @@
+Hello world
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-allcpp1-hello.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-allcpp1-hello.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-as-for-variant-20-types.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-as-for-variant-20-types.cpp.execution
new file mode 100644
index 000000000..5e2c9d82e
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-as-for-variant-20-types.cpp.execution
@@ -0,0 +1,60 @@
+v as X< 0> = 0
+v as X< 1> = 1
+v as X< 2> = 2
+v as X< 3> = 3
+v as X< 4> = 4
+v as X< 5> = 5
+v as X< 6> = 6
+v as X< 7> = 7
+v as X< 8> = 8
+v as X< 9> = 9
+v as X<10> = 10
+v as X<11> = 11
+v as X<12> = 12
+v as X<13> = 13
+v as X<14> = 14
+v as X<15> = 15
+v as X<16> = 16
+v as X<17> = 17
+v as X<18> = 18
+v as X<19> = 19
+as_const(v) as X< 0> = 0
+as_const(v) as X< 1> = 1
+as_const(v) as X< 2> = 2
+as_const(v) as X< 3> = 3
+as_const(v) as X< 4> = 4
+as_const(v) as X< 5> = 5
+as_const(v) as X< 6> = 6
+as_const(v) as X< 7> = 7
+as_const(v) as X< 8> = 8
+as_const(v) as X< 9> = 9
+as_const(v) as X<10> = 10
+as_const(v) as X<11> = 11
+as_const(v) as X<12> = 12
+as_const(v) as X<13> = 13
+as_const(v) as X<14> = 14
+as_const(v) as X<15> = 15
+as_const(v) as X<16> = 16
+as_const(v) as X<17> = 17
+as_const(v) as X<18> = 18
+as_const(v) as X<19> = 19
+move(v) as X< 0> = 0
+move(v) as X< 1> = 1
+move(v) as X< 2> = 2
+move(v) as X< 3> = 3
+move(v) as X< 4> = 4
+move(v) as X< 5> = 5
+move(v) as X< 6> = 6
+move(v) as X< 7> = 7
+move(v) as X< 8> = 8
+move(v) as X< 9> = 9
+move(v) as X<10> = 10
+move(v) as X<11> = 11
+move(v) as X<12> = 12
+move(v) as X<13> = 13
+move(v) as X<14> = 14
+move(v) as X<15> = 15
+move(v) as X<16> = 16
+move(v) as X<17> = 17
+move(v) as X<18> = 18
+move(v) as X<19> = 19
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-as-for-variant-20-types.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-as-for-variant-20-types.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-bounds-check.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-bounds-check.cpp.execution
new file mode 100644
index 000000000..8474b9159
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-bounds-check.cpp.execution
@@ -0,0 +1 @@
+Bounds safety violation: out of bounds access attempt detected - attempted access at index 5, [min,max] range is [0,4]
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-bounds-check.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-bounds-check.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-bounds-safety-with-assert-2.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-bounds-safety-with-assert-2.cpp.execution
new file mode 100644
index 000000000..6330ca570
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-bounds-safety-with-assert-2.cpp.execution
@@ -0,0 +1,5 @@
+1
+44
+45
+46
+5
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-bounds-safety-with-assert-2.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-bounds-safety-with-assert-2.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-bounds-safety-with-assert.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-bounds-safety-with-assert.cpp.execution
new file mode 100644
index 000000000..776dc1460
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-bounds-safety-with-assert.cpp.execution
@@ -0,0 +1 @@
+Bounds safety violation
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-bounds-safety-with-assert.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-bounds-safety-with-assert.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-bugfix-for-literal-as-nttp.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-bugfix-for-literal-as-nttp.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-bugfix-for-literal-as-nttp.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-bugfix-for-literal-as-nttp.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-bugfix-for-ufcs-non-local.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-bugfix-for-ufcs-non-local.cpp.output
new file mode 100644
index 000000000..74d1ceac6
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-bugfix-for-ufcs-non-local.cpp.output
@@ -0,0 +1,41 @@
+In file included from mixed-bugfix-for-ufcs-non-local.cpp:6:
+../../../include/cpp2util.h:1128:1: error: lambda-expression in template parameter type
+ 1128 | [LAMBDADEFCAPT]< \
+      | ^
+../../../include/cpp2util.h:1165:59: note: in expansion of macro ‘CPP2_UFCS_’
+ 1165 | #define CPP2_UFCS_NONLOCAL(...)                           CPP2_UFCS_(,CPP2_UFCS_IDENTITY,CPP2_UFCS_IDENTITY,(),,__VA_ARGS__)
+      |                                                           ^~~~~~~~~~
+mixed-bugfix-for-ufcs-non-local.cpp2:13:12: note: in expansion of macro ‘CPP2_UFCS_NONLOCAL’
+mixed-bugfix-for-ufcs-non-local.cpp2:13:36: error: template argument 1 is invalid
+../../../include/cpp2util.h:1128:1: error: lambda-expression in template parameter type
+ 1128 | [LAMBDADEFCAPT]< \
+      | ^
+../../../include/cpp2util.h:1165:59: note: in expansion of macro ‘CPP2_UFCS_’
+ 1165 | #define CPP2_UFCS_NONLOCAL(...)                           CPP2_UFCS_(,CPP2_UFCS_IDENTITY,CPP2_UFCS_IDENTITY,(),,__VA_ARGS__)
+      |                                                           ^~~~~~~~~~
+mixed-bugfix-for-ufcs-non-local.cpp2:21:12: note: in expansion of macro ‘CPP2_UFCS_NONLOCAL’
+mixed-bugfix-for-ufcs-non-local.cpp2:21:36: error: template argument 1 is invalid
+../../../include/cpp2util.h:1128:1: error: lambda-expression in template parameter type
+ 1128 | [LAMBDADEFCAPT]< \
+      | ^
+../../../include/cpp2util.h:1165:59: note: in expansion of macro ‘CPP2_UFCS_’
+ 1165 | #define CPP2_UFCS_NONLOCAL(...)                           CPP2_UFCS_(,CPP2_UFCS_IDENTITY,CPP2_UFCS_IDENTITY,(),,__VA_ARGS__)
+      |                                                           ^~~~~~~~~~
+mixed-bugfix-for-ufcs-non-local.cpp2:31:12: note: in expansion of macro ‘CPP2_UFCS_NONLOCAL’
+mixed-bugfix-for-ufcs-non-local.cpp2:31:36: error: template argument 1 is invalid
+../../../include/cpp2util.h:1128:1: error: lambda-expression in template parameter type
+ 1128 | [LAMBDADEFCAPT]< \
+      | ^
+../../../include/cpp2util.h:1165:59: note: in expansion of macro ‘CPP2_UFCS_’
+ 1165 | #define CPP2_UFCS_NONLOCAL(...)                           CPP2_UFCS_(,CPP2_UFCS_IDENTITY,CPP2_UFCS_IDENTITY,(),,__VA_ARGS__)
+      |                                                           ^~~~~~~~~~
+mixed-bugfix-for-ufcs-non-local.cpp2:33:12: note: in expansion of macro ‘CPP2_UFCS_NONLOCAL’
+mixed-bugfix-for-ufcs-non-local.cpp2:33:36: error: template argument 1 is invalid
+../../../include/cpp2util.h:1128:1: error: lambda-expression in template parameter type
+ 1128 | [LAMBDADEFCAPT]< \
+      | ^
+../../../include/cpp2util.h:1165:59: note: in expansion of macro ‘CPP2_UFCS_’
+ 1165 | #define CPP2_UFCS_NONLOCAL(...)                           CPP2_UFCS_(,CPP2_UFCS_IDENTITY,CPP2_UFCS_IDENTITY,(),,__VA_ARGS__)
+      |                                                           ^~~~~~~~~~
+mixed-bugfix-for-ufcs-non-local.cpp2:21:12: note: in expansion of macro ‘CPP2_UFCS_NONLOCAL’
+mixed-bugfix-for-ufcs-non-local.cpp2:21:36: error: template argument 1 is invalid
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-captures-in-expressions-and-postconditions.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-captures-in-expressions-and-postconditions.cpp.execution
new file mode 100644
index 000000000..dfca5b9a3
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-captures-in-expressions-and-postconditions.cpp.execution
@@ -0,0 +1,4 @@
+hello
+2022
+hello-ish
+2022-ish
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-captures-in-expressions-and-postconditions.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-captures-in-expressions-and-postconditions.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-fixed-type-aliases.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-fixed-type-aliases.cpp.execution
new file mode 100644
index 000000000..3122e6030
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-fixed-type-aliases.cpp.execution
@@ -0,0 +1,4 @@
+true
+false
+"test.exe"
+true
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-fixed-type-aliases.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-fixed-type-aliases.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-float-literals.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-float-literals.cpp.execution
new file mode 100644
index 000000000..6b15b12bc
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-float-literals.cpp.execution
@@ -0,0 +1,72 @@
+123
+123
+123
+123
+123
+123
+123456
+123
+123
+123
+123
+123
+123
+123456
+123456
+123456
+456
+456
+1e+10
+1e+10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+123456
+123456
+456
+456
+1e+10
+1e+10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+123
+123
+123
+123
+123
+123
+123456
+123
+123
+123
+123
+123
+123
+123456
+123456
+456
+1e+10
+1e+10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+123456
+456
+1e+10
+1e+10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-float-literals.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-float-literals.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-forwarding.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-forwarding.cpp.execution
new file mode 100644
index 000000000..952feac3b
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-forwarding.cpp.execution
@@ -0,0 +1,12 @@
++X 1
++X 2
+copy X 1
+copy X 2
+copy X 1
+move X 2
++X 3
++X 4
+copy X 3
+copy X 4
+move X 3
+move X 4
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-forwarding.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-forwarding.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-and-std-for-each.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-and-std-for-each.cpp.execution
new file mode 100644
index 000000000..728fbcc8f
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-and-std-for-each.cpp.execution
@@ -0,0 +1,2 @@
+hello-ish maybe
+2022-ish maybe
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-and-std-for-each.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-and-std-for-each.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.execution
new file mode 100644
index 000000000..dfca5b9a3
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.execution
@@ -0,0 +1,4 @@
+hello
+2022
+hello-ish
+2022-ish
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-and-std-ranges-for-each.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-and-std-ranges-for-each.cpp.execution
new file mode 100644
index 000000000..dfca5b9a3
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-and-std-ranges-for-each.cpp.execution
@@ -0,0 +1,4 @@
+hello
+2022
+hello-ish
+2022-ish
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-and-std-ranges-for-each.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-and-std-ranges-for-each.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-with-pointer-capture.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-with-pointer-capture.cpp.execution
new file mode 100644
index 000000000..e9d6a083f
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-with-pointer-capture.cpp.execution
@@ -0,0 +1,6 @@
+
+hello
+
+2023
+hello-ish
+2023-ish
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-with-pointer-capture.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-with-pointer-capture.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-with-repeated-capture.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-with-repeated-capture.cpp.execution
new file mode 100644
index 000000000..137aaec33
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-with-repeated-capture.cpp.execution
@@ -0,0 +1,6 @@
+
+hello
+
+2022
+hello-ish
+2022-ish
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-with-repeated-capture.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-function-expression-with-repeated-capture.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-hello.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-hello.cpp.execution
new file mode 100644
index 000000000..c8848197e
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-hello.cpp.execution
@@ -0,0 +1 @@
+Hello [world]
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-hello.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-hello.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-increment-decrement.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-increment-decrement.cpp.execution
new file mode 100644
index 000000000..6f42aeb32
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-increment-decrement.cpp.execution
@@ -0,0 +1,2 @@
+12234
+12234
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-increment-decrement.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-increment-decrement.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-initialization-safety-3-contract-violation.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-initialization-safety-3-contract-violation.cpp.execution
new file mode 100644
index 000000000..e16104fe5
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-initialization-safety-3-contract-violation.cpp.execution
@@ -0,0 +1 @@
+Contract violation: fill: value must contain at least count elements
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-initialization-safety-3-contract-violation.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-initialization-safety-3-contract-violation.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-initialization-safety-3.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-initialization-safety-3.cpp.execution
new file mode 100644
index 000000000..b261dd86c
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-initialization-safety-3.cpp.execution
@@ -0,0 +1 @@
+>> [xyzzy]
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-initialization-safety-3.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-initialization-safety-3.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-inspect-templates.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-inspect-templates.cpp.execution
new file mode 100644
index 000000000..03cdf50b7
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-inspect-templates.cpp.execution
@@ -0,0 +1,8 @@
+inspected vec : std::vector
+inspected arr : std::array
+inspected var : std::variant
+inspected myt : my_type
+inspected vec : std::vector
+inspected arr : std::array
+inspected var : std::variant
+inspected myt : my_type
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-inspect-templates.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-inspect-templates.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-inspect-values-2.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-inspect-values-2.cpp.execution
new file mode 100644
index 000000000..8372eadca
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-inspect-values-2.cpp.execution
@@ -0,0 +1,5 @@
+i is between 11 and 20
+less than 20
+i is between 10 and 30
+v is empty
+v is empty
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-inspect-values-2.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-inspect-values-2.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-inspect-values.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-inspect-values.cpp.execution
new file mode 100644
index 000000000..e7130e0f8
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-inspect-values.cpp.execution
@@ -0,0 +1,12 @@
+rev dodgson
+(no match)
+the answer
+zero
+plugh
+zero
+1 or 2
+1 or 2
+3
+integer -42
+xyzzy
+(no match)
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-inspect-values.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-inspect-values.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-inspect-with-typeof-of-template-arg-list.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-inspect-with-typeof-of-template-arg-list.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-inspect-with-typeof-of-template-arg-list.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-inspect-with-typeof-of-template-arg-list.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-intro-example-three-loops.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-intro-example-three-loops.cpp.execution
new file mode 100644
index 000000000..984a60a83
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-intro-example-three-loops.cpp.execution
@@ -0,0 +1,7 @@
+>> hello
+>> big
+>> world
+  **  **  **
+>> [hello]
+>> [big]
+>> [world]
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-intro-example-three-loops.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-intro-example-three-loops.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-intro-for-with-counter-include-last.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-intro-for-with-counter-include-last.cpp.execution
new file mode 100644
index 000000000..05961867a
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-intro-for-with-counter-include-last.cpp.execution
@@ -0,0 +1,5 @@
+1 42
+2 84
+3 168
+4 336
+5 672
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-intro-for-with-counter-include-last.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-intro-for-with-counter-include-last.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-lifetime-safety-and-null-contracts.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-lifetime-safety-and-null-contracts.cpp.execution
new file mode 100644
index 000000000..f4dd62312
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-lifetime-safety-and-null-contracts.cpp.execution
@@ -0,0 +1 @@
+sending error to my framework... [dynamic null dereference attempt detected]
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-lifetime-safety-and-null-contracts.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-lifetime-safety-and-null-contracts.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-lifetime-safety-pointer-init-4.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-lifetime-safety-pointer-init-4.cpp.execution
new file mode 100644
index 000000000..7ee4d37b2
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-lifetime-safety-pointer-init-4.cpp.execution
@@ -0,0 +1 @@
+>> 42
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-lifetime-safety-pointer-init-4.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-lifetime-safety-pointer-init-4.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-multiple-return-values.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-multiple-return-values.cpp.execution
new file mode 100644
index 000000000..b3fc65a7c
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-multiple-return-values.cpp.execution
@@ -0,0 +1,2 @@
+a is 10
+b is xyzzy
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-multiple-return-values.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-multiple-return-values.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-out-destruction.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-out-destruction.cpp.execution
new file mode 100644
index 000000000..df8e3e4ff
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-out-destruction.cpp.execution
@@ -0,0 +1,21 @@
+enter main
+enter f00
+enter f01
++X 1
+exit f01
+-X 1
+exit f00
+
+enter f10
+enter f11
+enter f12
+enter f13
+enter f14
++X 2
+exit f14
+exit f13
+exit f12
+-X 2
+exit f11
+exit f10
+exit main
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-out-destruction.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-out-destruction.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-parameter-passing-generic-out.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-parameter-passing-generic-out.cpp.execution
new file mode 100644
index 000000000..982a789cf
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-parameter-passing-generic-out.cpp.execution
@@ -0,0 +1,2 @@
+42
+exxxx
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-parameter-passing-generic-out.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-parameter-passing-generic-out.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-parameter-passing-with-forward.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-parameter-passing-with-forward.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-parameter-passing-with-forward.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-parameter-passing-with-forward.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-parameter-passing.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-parameter-passing.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-parameter-passing.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-parameter-passing.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-postexpression-with-capture.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-postexpression-with-capture.cpp.execution
new file mode 100644
index 000000000..a17035eda
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-postexpression-with-capture.cpp.execution
@@ -0,0 +1,2 @@
+xyzzy and plugh
+xyzzyplugh
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-postexpression-with-capture.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-postexpression-with-capture.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-postfix-expression-custom-formatting.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-postfix-expression-custom-formatting.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-postfix-expression-custom-formatting.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-postfix-expression-custom-formatting.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-string-interpolation.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-string-interpolation.cpp.execution
new file mode 100644
index 000000000..eebb290a9
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-string-interpolation.cpp.execution
@@ -0,0 +1,17 @@
+a = 2, b = (empty)
+a^2 + b = 46
+sv = my string_view
+osv = (empty)
+osv = string literal bound to optional string_view
+var = (empty)
+var = abracadabra
+var = 2.718280
+mypair = (12, 3.400000)
+tup1 = (12)
+tup2 = (12, 3.400000)
+tup3 = (12, 3.400000, 456)
+p = (first, (empty))
+t = (3.140000, (empty), (empty))
+vv = 0
+vv = (1, 2.300000)
+custom = (customize me - no cpp2::to_string overload exists for this type)
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-string-interpolation.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-string-interpolation.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-test-parens.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-test-parens.cpp.execution
new file mode 100644
index 000000000..59967f29d
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-test-parens.cpp.execution
@@ -0,0 +1,3 @@
+11
+12
+13*14 is 182
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-test-parens.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-test-parens.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-type-safety-1.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-type-safety-1.cpp.execution
new file mode 100644
index 000000000..f1a0d084e
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-type-safety-1.cpp.execution
@@ -0,0 +1,6 @@
+1.1 is int? false
+1   is int? true
+
+s* is Shape?  true
+s* is Circle? true
+s* is Square? false
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-type-safety-1.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-type-safety-1.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-ufcs-multiple-template-arguments.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/mixed-ufcs-multiple-template-arguments.cpp.execution
new file mode 100644
index 000000000..dec75369f
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/mixed-ufcs-multiple-template-arguments.cpp.execution
@@ -0,0 +1,2 @@
+rain
+rain
diff --git a/regression-tests/test-results/gcc-14-c++2b/mixed-ufcs-multiple-template-arguments.cpp.output b/regression-tests/test-results/gcc-14-c++2b/mixed-ufcs-multiple-template-arguments.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-assert-expected-not-null.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-assert-expected-not-null.cpp.execution
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-assert-expected-not-null.cpp.execution
rename to regression-tests/test-results/gcc-14-c++2b/pure2-assert-expected-not-null.cpp.execution
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-assert-expected-not-null.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-assert-expected-not-null.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-assert-optional-not-null.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-assert-optional-not-null.cpp.execution
new file mode 100644
index 000000000..c6aeba0fd
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-assert-optional-not-null.cpp.execution
@@ -0,0 +1 @@
+Null safety violation: std::optional does not contain a value
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-assert-optional-not-null.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-assert-optional-not-null.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-assert-shared-ptr-not-null.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-assert-shared-ptr-not-null.cpp.execution
new file mode 100644
index 000000000..85aafbe6a
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-assert-shared-ptr-not-null.cpp.execution
@@ -0,0 +1 @@
+Null safety violation: std::shared_ptr is empty
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-assert-shared-ptr-not-null.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-assert-shared-ptr-not-null.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-assert-unique-ptr-not-null.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-assert-unique-ptr-not-null.cpp.execution
new file mode 100644
index 000000000..af633d171
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-assert-unique-ptr-not-null.cpp.execution
@@ -0,0 +1 @@
+Null safety violation: std::unique_ptr is empty
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-assert-unique-ptr-not-null.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-assert-unique-ptr-not-null.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bounds-safety-span.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-bounds-safety-span.cpp.execution
new file mode 100644
index 000000000..3a0304fa2
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-bounds-safety-span.cpp.execution
@@ -0,0 +1,3 @@
+>> decorated
+>> hello
+>> world
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bounds-safety-span.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-bounds-safety-span.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-break-continue.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-break-continue.cpp.execution
new file mode 100644
index 000000000..c8af55771
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-break-continue.cpp.execution
@@ -0,0 +1,26 @@
+while_continue_inner:
+  00 inner 01 02 inner outer 10 inner 11 12 inner outer 20 inner 21 22 inner outer 
+while_continue_outer:
+  00 inner 01 10 inner 11 20 inner 21 
+while_break_inner:
+  00 inner 01 outer 10 inner 11 outer 20 inner 21 outer 
+while_break_outer:
+  00 inner 01 
+
+do_continue_inner:
+  00 inner 01 02 inner outer 10 inner 11 12 inner outer 20 inner 21 22 inner outer 
+do_continue_outer:
+  00 inner 01 10 inner 11 20 inner 21 
+do_break_inner:
+  00 inner 01 outer 10 inner 11 outer 20 inner 21 outer 
+do_break_outer:
+  00 inner 01 
+
+for_continue_inner:
+  00 inner 01 02 inner outer 10 inner 11 12 inner outer 20 inner 21 22 inner outer 
+for_continue_outer:
+  00 inner 01 10 inner 11 20 inner 21 
+for_break_inner:
+  00 inner 01 outer 10 inner 11 outer 20 inner 21 outer 
+for_break_outer:
+  00 inner 01 
\ No newline at end of file
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-break-continue.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-break-continue.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-assign-expression-list.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-assign-expression-list.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-assign-expression-list.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-assign-expression-list.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-discard-precedence.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-discard-precedence.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-discard-precedence.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-discard-precedence.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-empty-index.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-empty-index.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-indexed-call.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-indexed-call.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-indexed-call.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-indexed-call.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-max-munch.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-max-munch.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-max-munch.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-max-munch.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-memberwise-base-assignment.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-memberwise-base-assignment.cpp.execution
new file mode 100644
index 000000000..566837e51
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-memberwise-base-assignment.cpp.execution
@@ -0,0 +1,2 @@
+(out this, that)
+(out this, that)
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-memberwise-base-assignment.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-memberwise-base-assignment.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-name-lookup-and-value-decoration.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-name-lookup-and-value-decoration.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-name-lookup-and-value-decoration.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-name-lookup-and-value-decoration.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-non-local-function-expression.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-non-local-function-expression.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-non-local-function-expression.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-non-local-function-expression.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-non-local-initialization.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-non-local-initialization.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-non-local-initialization.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-non-local-initialization.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-optional-template-argument-list.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-optional-template-argument-list.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-optional-template-argument-list.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-optional-template-argument-list.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-requires-clause-in-forward-declaration.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-requires-clause-in-forward-declaration.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-requires-clause-in-forward-declaration.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-requires-clause-in-forward-declaration.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-requires-clause-unbraced-function-initializer.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-requires-clause-unbraced-function-initializer.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-requires-clause-unbraced-function-initializer.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-requires-clause-unbraced-function-initializer.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-template-argument.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-template-argument.cpp.execution
new file mode 100644
index 000000000..c508d5366
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-template-argument.cpp.execution
@@ -0,0 +1 @@
+false
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-template-argument.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-template-argument.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-ufcs-arguments.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-ufcs-arguments.cpp.execution
new file mode 100644
index 000000000..0e41b7819
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-ufcs-arguments.cpp.execution
@@ -0,0 +1,4 @@
+0123456789
+9
+0123456789
+9
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-ufcs-arguments.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-ufcs-arguments.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-ufcs-name-lookup.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-ufcs-name-lookup.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-ufcs-name-lookup.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-ufcs-name-lookup.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-ufcs-noexcept.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-ufcs-noexcept.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-ufcs-noexcept.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-ufcs-noexcept.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-ufcs-sfinae.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-ufcs-sfinae.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-ufcs-sfinae.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-ufcs-sfinae.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-unbraced-function-expression.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-unbraced-function-expression.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-unbraced-function-expression.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-unbraced-function-expression.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-variable-template.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-variable-template.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-variable-template.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-bugfix-for-variable-template.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-chained-comparisons.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-chained-comparisons.cpp.execution
new file mode 100644
index 000000000..b41a1bf75
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-chained-comparisons.cpp.execution
@@ -0,0 +1,27 @@
+0 0 0: true false false
+0 0 1: false false false
+0 0 2: false false false
+0 1 0: false false false
+0 1 1: false true false
+0 1 2: false true false
+0 2 0: false false false
+0 2 1: false false false
+0 2 2: false true false
+1 0 0: false false false
+1 0 1: false false false
+1 0 2: false false false
+1 1 0: false false true
+1 1 1: true false false
+1 1 2: false false false
+1 2 0: false false false
+1 2 1: false false false
+1 2 2: false true false
+2 0 0: false false false
+2 0 1: false false false
+2 0 2: false false false
+2 1 0: false false true
+2 1 1: false false false
+2 1 2: false false false
+2 2 0: false false true
+2 2 1: false false true
+2 2 2: true false false
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-chained-comparisons.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-chained-comparisons.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-concept-definition.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-concept-definition.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-concept-definition.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-concept-definition.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-contracts.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-contracts.cpp.execution
new file mode 100644
index 000000000..e8a01cd98
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-contracts.cpp.execution
@@ -0,0 +1,3 @@
+1
+2
+4
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-contracts.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-contracts.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-defaulted-comparisons-and-final-types.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-defaulted-comparisons-and-final-types.cpp.execution
new file mode 100644
index 000000000..9ff824547
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-defaulted-comparisons-and-final-types.cpp.execution
@@ -0,0 +1 @@
+less
\ No newline at end of file
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-defaulted-comparisons-and-final-types.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-defaulted-comparisons-and-final-types.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-enum.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-enum.cpp.execution
new file mode 100644
index 000000000..6d9a33c28
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-enum.cpp.execution
@@ -0,0 +1,29 @@
+x.to_string() is clubs
+x2.to_string() is clubs
+with if else: clubs
+with inspect: clubs
+
+file_attributes::cached.get_raw_value() is 1
+file_attributes::current.get_raw_value() is 2
+file_attributes::obsolete.get_raw_value() is 4
+file_attributes::cached_and_current.get_raw_value() is 3
+f. get_raw_value() is 1
+f2.get_raw_value() is 1
+f  is (cached)
+f2 is (cached)
+f2 is (none)
+f2 is (cached)
+f. get_raw_value() is 1
+f2.get_raw_value() is 1
+f  is (f2) is true
+f2 is (f ) is true
+
+f  is (cached, current, obsolete, cached_and_current)
+f2 is (cached, current, cached_and_current)
+f. get_raw_value() is 7
+f2.get_raw_value() is 3
+f  == f2   is false
+f  is (f2) is false
+f2 is (f ) is false
+(f & f2) == f2 is true
+inspecting f: includes all f2's flags ('cached' and 'current')
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-enum.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-enum.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-for-loop-range-with-lambda.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-for-loop-range-with-lambda.cpp.execution
new file mode 100644
index 000000000..19b3a90b2
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-for-loop-range-with-lambda.cpp.execution
@@ -0,0 +1 @@
+12345123451234512345
\ No newline at end of file
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-for-loop-range-with-lambda.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-for-loop-range-with-lambda.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-forward-return.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-forward-return.cpp.execution
new file mode 100644
index 000000000..f259f2362
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-forward-return.cpp.execution
@@ -0,0 +1,2 @@
+4
+42
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-forward-return.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-forward-return.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-function-multiple-forward-arguments.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-function-multiple-forward-arguments.cpp.execution
new file mode 100644
index 000000000..8baef1b4a
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-function-multiple-forward-arguments.cpp.execution
@@ -0,0 +1 @@
+abc
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-function-multiple-forward-arguments.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-function-multiple-forward-arguments.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-hello.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-hello.cpp.execution
new file mode 100644
index 000000000..c8848197e
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-hello.cpp.execution
@@ -0,0 +1 @@
+Hello [world]
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-hello.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-hello.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-initialization-safety-with-else-if.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-initialization-safety-with-else-if.cpp.execution
new file mode 100644
index 000000000..d00491fd7
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-initialization-safety-with-else-if.cpp.execution
@@ -0,0 +1 @@
+1
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-initialization-safety-with-else-if.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-initialization-safety-with-else-if.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-inspect-expression-in-generic-function-multiple-types.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-inspect-expression-in-generic-function-multiple-types.cpp.execution
new file mode 100644
index 000000000..fd5a6cdff
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-inspect-expression-in-generic-function-multiple-types.cpp.execution
@@ -0,0 +1,8 @@
+                        double value is not an int or string
+     variant<int, int, double> value is not an int or string
+                           any value is "xyzzy"
+                 optional<int> value is not an int or string
+                           int value is integer 42
+     variant<int, int, double> value is integer 1
+                           any value is integer 2
+                 optional<int> value is integer 3
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-inspect-expression-in-generic-function-multiple-types.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-inspect-expression-in-generic-function-multiple-types.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-inspect-expression-with-as-in-generic-function.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-inspect-expression-with-as-in-generic-function.cpp.execution
new file mode 100644
index 000000000..3cd874b4e
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-inspect-expression-with-as-in-generic-function.cpp.execution
@@ -0,0 +1,3 @@
+                        syzygy value is not an int
+                             1 value is 1
+                      1.100000 value is not an int
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-inspect-expression-with-as-in-generic-function.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-inspect-expression-with-as-in-generic-function.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-inspect-fallback-with-variant-any-optional.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-inspect-fallback-with-variant-any-optional.cpp.execution
new file mode 100644
index 000000000..a5cbcefe9
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-inspect-fallback-with-variant-any-optional.cpp.execution
@@ -0,0 +1,11 @@
+
+All these cases satisfy "matches std::string"
+
+variant<int, int, string>
+    ... matches std::string
+
+string
+    ... matches std::string
+
+optional<string>
+    ... matches std::string
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-inspect-fallback-with-variant-any-optional.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-inspect-fallback-with-variant-any-optional.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.execution
new file mode 100644
index 000000000..a2df8769d
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.execution
@@ -0,0 +1,17 @@
+
+All these cases satisfy "VOYDE AND EMPTIE"
+
+unique_ptr
+    ... VOYDE AND EMPTIE
+
+vector<int>::iterator
+    ... VOYDE AND EMPTIE
+
+variant<monostate, int, int, string>
+    ... VOYDE AND EMPTIE
+
+any
+    ... VOYDE AND EMPTIE
+
+optional<string>
+    ... VOYDE AND EMPTIE
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-interpolation.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-interpolation.cpp.execution
new file mode 100644
index 000000000..850cfc6bf
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-interpolation.cpp.execution
@@ -0,0 +1,12 @@
+g0g0g
+0g0g
+0g0
+00
+"0"
+"0
+"
+
+pl(ug$h
+0pl(ug$h
+Dog kennel           color mauve      price 3.14       in stock = true
+Dog kennel           color mauve      price 3.14       in stock = true
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-interpolation.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-interpolation.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-intro-example-hello-2022.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-intro-example-hello-2022.cpp.execution
new file mode 100644
index 000000000..8e8c5ee29
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-intro-example-hello-2022.cpp.execution
@@ -0,0 +1,2 @@
+>> [hello] - length 7
+>> [2022] - length 6
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-intro-example-hello-2022.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-intro-example-hello-2022.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-intro-example-three-loops.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-intro-example-three-loops.cpp.execution
new file mode 100644
index 000000000..c218d85df
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-intro-example-three-loops.cpp.execution
@@ -0,0 +1,8 @@
+>> hello
+>> big
+>> world
+  **  **  **
+>> [hello]
+>> [big]
+>> [world]
+>> end of program
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-intro-example-three-loops.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-intro-example-three-loops.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-is-with-free-functions-predicate.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-is-with-free-functions-predicate.cpp.execution
new file mode 100644
index 000000000..c8a07e430
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-is-with-free-functions-predicate.cpp.execution
@@ -0,0 +1,6 @@
+3.140000 is double bigger than 3
+3.140000 is bigger than 3
+42 is integer bigger than 3
+42 is bigger than 3
+a is integer bigger than 3
+a is bigger than 3
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-is-with-free-functions-predicate.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-is-with-free-functions-predicate.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-is-with-unnamed-predicates.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-is-with-unnamed-predicates.cpp.execution
new file mode 100644
index 000000000..c8a07e430
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-is-with-unnamed-predicates.cpp.execution
@@ -0,0 +1,6 @@
+3.140000 is double bigger than 3
+3.140000 is bigger than 3
+42 is integer bigger than 3
+42 is bigger than 3
+a is integer bigger than 3
+a is bigger than 3
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-is-with-unnamed-predicates.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-is-with-unnamed-predicates.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-is-with-variable-and-value.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-is-with-variable-and-value.cpp.execution
new file mode 100644
index 000000000..a9bc0680a
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-is-with-variable-and-value.cpp.execution
@@ -0,0 +1,9 @@
+3.14: unknown
+42: 42
+WithOp(): unknown
+WithGenOp(): unknown
+Cmp(): comparable
+std::string("text"): text
+"text": text
+std::string_view("text"): text
+:std::vector = ('t','e','x','t','\0'): unknown
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-is-with-variable-and-value.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-is-with-variable-and-value.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-last-use.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-last-use.cpp.execution
new file mode 100644
index 000000000..4632e068d
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-last-use.cpp.execution
@@ -0,0 +1 @@
+123456
\ No newline at end of file
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-last-use.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-last-use.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-look-up-parameter-across-unnamed-function.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-look-up-parameter-across-unnamed-function.cpp.execution
new file mode 100644
index 000000000..871727de1
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-look-up-parameter-across-unnamed-function.cpp.execution
@@ -0,0 +1 @@
+84
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-look-up-parameter-across-unnamed-function.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-look-up-parameter-across-unnamed-function.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-main-args.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-main-args.cpp.execution
new file mode 100644
index 000000000..bd992e432
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-main-args.cpp.execution
@@ -0,0 +1,2 @@
+args.argc            is 1
+args.argv[0]         is test.exe
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-main-args.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-main-args.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-more-wildcards.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-more-wildcards.cpp.execution
new file mode 100644
index 000000000..e37d6cb21
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-more-wildcards.cpp.execution
@@ -0,0 +1,2 @@
+yes, less
+yes, always
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-more-wildcards.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-more-wildcards.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-print.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-print.cpp.execution
new file mode 100644
index 000000000..4e4b4573d
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-print.cpp.execution
@@ -0,0 +1,2 @@
+43
+forty-and-three
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-print.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-print.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-raw-string-literal-and-interpolation.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-raw-string-literal-and-interpolation.cpp.execution
new file mode 100644
index 000000000..c48e2bd60
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-raw-string-literal-and-interpolation.cpp.execution
@@ -0,0 +1,17 @@
+this is a string
+raw string without interpolation
+this is raw string literal
+
+that can last for multiple
+
+lines
+this is raw string literal
+that can last for multiple
+lines
+42 R"(this can be added too)"
+calculations like m["one"] + m["two"] = 3 also works
+at the beginning of the line!!!
+
+
+    4242
+1.2.0.42
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-raw-string-literal-and-interpolation.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-raw-string-literal-and-interpolation.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-repeated-call.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-repeated-call.cpp.execution
new file mode 100644
index 000000000..d81cc0710
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-repeated-call.cpp.execution
@@ -0,0 +1 @@
+42
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-repeated-call.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-repeated-call.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-requires-clauses.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-requires-clauses.cpp.execution
new file mode 100644
index 000000000..105d7d9ad
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-requires-clauses.cpp.execution
@@ -0,0 +1 @@
+100
\ No newline at end of file
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-requires-clauses.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-requires-clauses.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-return-tuple-operator.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-return-tuple-operator.cpp.execution
new file mode 100644
index 000000000..a3b7f9a55
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-return-tuple-operator.cpp.execution
@@ -0,0 +1,3 @@
+12 , 34
+23 , 45
+34 , 56
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-return-tuple-operator.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-return-tuple-operator.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-statement-scope-parameters.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-statement-scope-parameters.cpp.execution
new file mode 100644
index 000000000..6fe5c7f6a
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-statement-scope-parameters.cpp.execution
@@ -0,0 +1,2 @@
+42
+43
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-statement-scope-parameters.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-statement-scope-parameters.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-stdio-with-raii.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-stdio-with-raii.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-stdio-with-raii.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-stdio-with-raii.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-stdio.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-stdio.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-stdio.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-stdio.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-synthesize-rightshift-and-rightshifteq.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-synthesize-rightshift-and-rightshifteq.cpp.execution
new file mode 100644
index 000000000..b8626c4cf
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-synthesize-rightshift-and-rightshifteq.cpp.execution
@@ -0,0 +1 @@
+4
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-synthesize-rightshift-and-rightshifteq.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-synthesize-rightshift-and-rightshifteq.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-template-parameter-lists.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-template-parameter-lists.cpp.execution
new file mode 100644
index 000000000..2861a7a20
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-template-parameter-lists.cpp.execution
@@ -0,0 +1,4 @@
+f1: 2
+f2: 4
+f3: 6
+f4: 8
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-template-parameter-lists.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-template-parameter-lists.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-trailing-commas.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-trailing-commas.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-trailing-commas.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-trailing-commas.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-type-and-namespace-aliases.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-type-and-namespace-aliases.cpp.execution
new file mode 100644
index 000000000..9f037f474
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-type-and-namespace-aliases.cpp.execution
@@ -0,0 +1,2 @@
+xyzzy
+plugh
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-type-and-namespace-aliases.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-type-and-namespace-aliases.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-type-safety-1.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-type-safety-1.cpp.execution
new file mode 100644
index 000000000..d1aa6265a
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-type-safety-1.cpp.execution
@@ -0,0 +1,9 @@
+                         double is int? false
+      variant<int, int, double> is int? false
+                            any is int? false
+                  optional<int> is int? false
+
+                            int is int? true
+      variant<int, int, double> is int? true
+                            any is int? true
+                  optional<int> is int? true
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-type-safety-1.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-type-safety-1.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-type-safety-2-with-inspect-expression.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-type-safety-2-with-inspect-expression.cpp.execution
new file mode 100644
index 000000000..7045a6e79
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-type-safety-2-with-inspect-expression.cpp.execution
@@ -0,0 +1,8 @@
+                        double value is not an int
+     variant<int, double, int> value is not an int
+                           any value is not an int
+                 optional<int> value is not an int
+                           int value is 42
+     variant<int, double, int> value is 1
+                           any value is 2
+                 optional<int> value is 3
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-type-safety-2-with-inspect-expression.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-type-safety-2-with-inspect-expression.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-basics.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-types-basics.cpp.execution
new file mode 100644
index 000000000..96b31fc42
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-types-basics.cpp.execution
@@ -0,0 +1,27 @@
+myclass: implicit from int
+    data: 1, more: 504
+N::myclass::f with 53
+N::myclass::nested::g
+f1: 2
+f2: 4
+f3: 6
+f4: 8
+myclass: explicit from string
+    data: 99, more: abracadabra
+myclass: default
+    data: 504, more: 3.141590
+myclass: from int and string
+    data: 77, more: hair1 plugh
+x's state before assignments:     data: 1, more: 504
+myclass: implicit from int
+    data: 84, more: 504
+myclass: explicit from string
+    data: 99, more: syzygy
+myclass: implicit from int
+    data: 84, more: 504
+myclass: explicit from string
+    data: 99, more: syzygy
+myclass: destructor
+myclass: destructor
+myclass: destructor
+myclass: destructor
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-basics.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-types-basics.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-down-upcast.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-types-down-upcast.cpp.execution
new file mode 100644
index 000000000..20751af06
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-types-down-upcast.cpp.execution
@@ -0,0 +1,24 @@
+const foo 
+const foo 
+const foo 
+const foo 
+foo 
+foo 
+Call B const: 0.000000
+Call B const: 0.000000
+Call A const: 0
+Call B const: 0.000000
+Call B const: 0.000000
+Call A const: 0
+Call B mut: 0.000000
+Call B mut: 0.000000
+Call A mut: 0
+Call A const: 0
+Call B const: 0.000000
+Call A const: 0
+Call A const: 0
+Call B const: 0.000000
+Call A const: 0
+Call A mut: 0
+Call B mut: 0.000000
+Call A mut: 0
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-down-upcast.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-types-down-upcast.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-inheritance.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-types-inheritance.cpp.execution
new file mode 100644
index 000000000..809430aaa
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-types-inheritance.cpp.execution
@@ -0,0 +1,5 @@
+Parsnip checks in for the day's shift
+printing: Parsnip lives at 123 Main St.
+-> [vcall: make_speak] Parsnip cracks a few jokes with a coworker
+-> [vcall: do_work] Parsnip carries some half-tonne crates of Fe2O3 to cold storage
+Tired but satisfied after another successful day, Parsnip checks out and goes home to their family
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-inheritance.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-types-inheritance.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-order-independence-and-nesting.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-types-order-independence-and-nesting.cpp.execution
new file mode 100644
index 000000000..cc716cc8c
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-types-order-independence-and-nesting.cpp.execution
@@ -0,0 +1,5 @@
+made a safely initialized cycle
+leaving call to 'why(5)'
+leaving call to 'why(3)'
+leaving call to 'why(1)'
+hallo welt
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-order-independence-and-nesting.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-types-order-independence-and-nesting.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-ordering-via-meta-functions.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-types-ordering-via-meta-functions.cpp.execution
new file mode 100644
index 000000000..54b3aab09
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-types-ordering-via-meta-functions.cpp.execution
@@ -0,0 +1 @@
+less more less
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-ordering-via-meta-functions.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-types-ordering-via-meta-functions.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-1-provide-everything.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-1-provide-everything.cpp.execution
new file mode 100644
index 000000000..fc5a23bde
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-1-provide-everything.cpp.execution
@@ -0,0 +1,8 @@
+Function invoked        Call syntax   Results
+----------------------  ------------  ------------------------------------------------------
+ctor - from string      construct     [ Henry | 123 Ford Dr. ]
+ctor - from string      assign        [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   cp-construct  [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - move             mv-construct  [ Clara(CM) | 123 Ford Dr. ] <- [  |  ]
+assign - copy           cp-assign     [ Clara | 123 Ford Dr.(AC) ] <- [ Clara | 123 Ford Dr. ]
+assign - move           mv-assign     [ Clara | 123 Ford Dr. ] <- [  |  ]
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-1-provide-everything.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-1-provide-everything.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.execution
new file mode 100644
index 000000000..7cbf0f869
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.execution
@@ -0,0 +1,8 @@
+Function invoked        Call syntax   Results
+----------------------  ------------  ------------------------------------------------------
+ctor - from string      construct     [ Henry | 123 Ford Dr. ]
+ctor - from string      assign        [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   cp-construct  [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - move             mv-construct  [ Clara(CM) | 123 Ford Dr. ] <- [  |  ]
+assign - copy           cp-assign     [ Clara | 123 Ford Dr.(AC) ] <- [ Clara | 123 Ford Dr. ]
+assign - copy           mv-assign     [ Clara | 123 Ford Dr.(AC) ] <- [  |  ]
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.execution
new file mode 100644
index 000000000..541b2a0d9
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.execution
@@ -0,0 +1,8 @@
+Function invoked        Call syntax   Results
+----------------------  ------------  ------------------------------------------------------
+ctor - from string      construct     [ Henry | 123 Ford Dr. ]
+ctor - from string      assign        [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   cp-construct  [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - move             mv-construct  [ Clara(CM) | 123 Ford Dr. ] <- [  |  ]
+ctor - copy (GENERAL)   cp-assign     [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+assign - move           mv-assign     [ Clara | 123 Ford Dr. ] <- [  |  ]
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.execution
new file mode 100644
index 000000000..24d4e763a
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.execution
@@ -0,0 +1,8 @@
+Function invoked        Call syntax   Results
+----------------------  ------------  ------------------------------------------------------
+ctor - from string      construct     [ Henry | 123 Ford Dr. ]
+ctor - from string      assign        [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   cp-construct  [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   mv-construct  [ Clara | 123 Ford Dr. ] <- [  |  ]
+assign - copy           cp-assign     [ Clara | 123 Ford Dr.(AC) ] <- [ Clara | 123 Ford Dr. ]
+assign - move           mv-assign     [ Clara | 123 Ford Dr. ] <- [  |  ]
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution
new file mode 100644
index 000000000..c387c0371
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution
@@ -0,0 +1,8 @@
+Function invoked        Call syntax   Results
+----------------------  ------------  ------------------------------------------------------
+ctor - from string      construct     [ Henry | 123 Ford Dr. ]
+ctor - from string      assign        [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   cp-construct  [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   mv-construct  [ Clara | 123 Ford Dr. ] <- [  |  ]
+ctor - copy (GENERAL)   cp-assign     [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   mv-assign     [ Clara | 123 Ford Dr. ] <- [  |  ]
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-that-parameters.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-types-that-parameters.cpp.execution
new file mode 100644
index 000000000..abd49e623
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-types-that-parameters.cpp.execution
@@ -0,0 +1,7 @@
+name 'Henry', addr '123 Ford Dr.'
+-----
+name 'Henry', addr '123 Ford Dr.'
+name 'Henry', addr '123 Ford Dr.'
+-----
+name '', addr ''
+name 'Henry', addr '123 Ford Dr.'
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-that-parameters.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-types-that-parameters.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-value-types-via-meta-functions.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-types-value-types-via-meta-functions.cpp.execution
new file mode 100644
index 000000000..daee7bf51
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-types-value-types-via-meta-functions.cpp.execution
@@ -0,0 +1 @@
+less less less 
\ No newline at end of file
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-types-value-types-via-meta-functions.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-types-value-types-via-meta-functions.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-ufcs-member-access-and-chaining.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-ufcs-member-access-and-chaining.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-ufcs-member-access-and-chaining.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-ufcs-member-access-and-chaining.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-union.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-union.cpp.execution
new file mode 100644
index 000000000..e52daad8e
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-union.cpp.execution
@@ -0,0 +1,4 @@
+sizeof(x) - alignof(x) == max(sizeof(fields)) is true
+(not a name)
+xyz
+42
\ No newline at end of file
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-union.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-union.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-variadics.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-variadics.cpp.execution
new file mode 100644
index 000000000..53bc692f9
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/pure2-variadics.cpp.execution
@@ -0,0 +1,7 @@
+xyz
+plu
+abr
+3.14word-1500
+first all() returned false
+second all() returned true
+sum of (1, 2, 3, 100) is: 106
\ No newline at end of file
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-variadics.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-variadics.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-various-string-literals.cpp.execution b/regression-tests/test-results/gcc-14-c++2b/pure2-various-string-literals.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/pure2-various-string-literals.cpp.output b/regression-tests/test-results/gcc-14-c++2b/pure2-various-string-literals.cpp.output
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/gcc-14-c++2b/run-tests-gcc-13.sh b/regression-tests/test-results/gcc-14-c++2b/run-tests-gcc-13.sh
new file mode 100644
index 000000000..95f3efcda
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/run-tests-gcc-13.sh
@@ -0,0 +1,24 @@
+# This is intended to be run in the /test-results/gcc-13 subdirectory
+# in a Linux shell with gcc 13 installed
+#
+cp ../*.cpp .
+rm -f *.output
+count=0
+exe_count=0
+g++ --version > gcc-version.output 2>&1
+for f in *.cpp
+do
+    let count=count+1
+    printf "[%s] Starting gcc 13 %s\n" "$count" "$f"
+    g++ -I../../../include -std=c++2b -pthread -Wold-style-cast -Wunused-parameter -o test.exe $f > $f.output 2>&1
+    rm -f $f
+    if test -f "test.exe"; then
+        let exe_count=exe_count+1
+        printf "    Starting executable\n"
+        ./test.exe > $f.execution 2>&1
+        rm -f test.exe
+    fi
+done
+rm -f *.obj *.exp *.lib
+printf "\nDone: %s .cpp tests compiled\n" "$count"
+printf "\n      %s .cpp executables generated and run\n" "$exe_count"
diff --git a/regression-tests/test-results/gcc-14-c++2b/xyzzy b/regression-tests/test-results/gcc-14-c++2b/xyzzy
new file mode 100644
index 000000000..805bcb853
--- /dev/null
+++ b/regression-tests/test-results/gcc-14-c++2b/xyzzy
@@ -0,0 +1 @@
+Hello Fred with UFCS!
\ No newline at end of file
diff --git a/regression-tests/test-results/msvc-2022/MSVC-version.output b/regression-tests/test-results/msvc-2022-c++20/MSVC-version.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/MSVC-version.output
rename to regression-tests/test-results/msvc-2022-c++20/MSVC-version.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-allcpp1-hello.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-allcpp1-hello.cpp.execution
new file mode 100644
index 000000000..802992c42
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-allcpp1-hello.cpp.execution
@@ -0,0 +1 @@
+Hello world
diff --git a/regression-tests/test-results/msvc-2022/mixed-allcpp1-hello.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-allcpp1-hello.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-allcpp1-hello.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-allcpp1-hello.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-as-for-variant-20-types.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-as-for-variant-20-types.cpp.execution
new file mode 100644
index 000000000..5e2c9d82e
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-as-for-variant-20-types.cpp.execution
@@ -0,0 +1,60 @@
+v as X< 0> = 0
+v as X< 1> = 1
+v as X< 2> = 2
+v as X< 3> = 3
+v as X< 4> = 4
+v as X< 5> = 5
+v as X< 6> = 6
+v as X< 7> = 7
+v as X< 8> = 8
+v as X< 9> = 9
+v as X<10> = 10
+v as X<11> = 11
+v as X<12> = 12
+v as X<13> = 13
+v as X<14> = 14
+v as X<15> = 15
+v as X<16> = 16
+v as X<17> = 17
+v as X<18> = 18
+v as X<19> = 19
+as_const(v) as X< 0> = 0
+as_const(v) as X< 1> = 1
+as_const(v) as X< 2> = 2
+as_const(v) as X< 3> = 3
+as_const(v) as X< 4> = 4
+as_const(v) as X< 5> = 5
+as_const(v) as X< 6> = 6
+as_const(v) as X< 7> = 7
+as_const(v) as X< 8> = 8
+as_const(v) as X< 9> = 9
+as_const(v) as X<10> = 10
+as_const(v) as X<11> = 11
+as_const(v) as X<12> = 12
+as_const(v) as X<13> = 13
+as_const(v) as X<14> = 14
+as_const(v) as X<15> = 15
+as_const(v) as X<16> = 16
+as_const(v) as X<17> = 17
+as_const(v) as X<18> = 18
+as_const(v) as X<19> = 19
+move(v) as X< 0> = 0
+move(v) as X< 1> = 1
+move(v) as X< 2> = 2
+move(v) as X< 3> = 3
+move(v) as X< 4> = 4
+move(v) as X< 5> = 5
+move(v) as X< 6> = 6
+move(v) as X< 7> = 7
+move(v) as X< 8> = 8
+move(v) as X< 9> = 9
+move(v) as X<10> = 10
+move(v) as X<11> = 11
+move(v) as X<12> = 12
+move(v) as X<13> = 13
+move(v) as X<14> = 14
+move(v) as X<15> = 15
+move(v) as X<16> = 16
+move(v) as X<17> = 17
+move(v) as X<18> = 18
+move(v) as X<19> = 19
diff --git a/regression-tests/test-results/msvc-2022/mixed-as-for-variant-20-types.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-as-for-variant-20-types.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-as-for-variant-20-types.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-as-for-variant-20-types.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-bounds-check.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-bounds-check.cpp.execution
new file mode 100644
index 000000000..8474b9159
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-bounds-check.cpp.execution
@@ -0,0 +1 @@
+Bounds safety violation: out of bounds access attempt detected - attempted access at index 5, [min,max] range is [0,4]
diff --git a/regression-tests/test-results/msvc-2022/mixed-bounds-check.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-bounds-check.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-bounds-check.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-bounds-check.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-bounds-safety-with-assert-2.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-bounds-safety-with-assert-2.cpp.execution
new file mode 100644
index 000000000..6330ca570
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-bounds-safety-with-assert-2.cpp.execution
@@ -0,0 +1,5 @@
+1
+44
+45
+46
+5
diff --git a/regression-tests/test-results/msvc-2022/mixed-bounds-safety-with-assert-2.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-bounds-safety-with-assert-2.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-bounds-safety-with-assert-2.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-bounds-safety-with-assert-2.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-bounds-safety-with-assert.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-bounds-safety-with-assert.cpp.execution
new file mode 100644
index 000000000..776dc1460
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-bounds-safety-with-assert.cpp.execution
@@ -0,0 +1 @@
+Bounds safety violation
diff --git a/regression-tests/test-results/msvc-2022/mixed-bounds-safety-with-assert.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-bounds-safety-with-assert.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-bounds-safety-with-assert.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-bounds-safety-with-assert.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-bugfix-for-literal-as-nttp.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-bugfix-for-literal-as-nttp.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/mixed-bugfix-for-literal-as-nttp.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-bugfix-for-literal-as-nttp.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-bugfix-for-literal-as-nttp.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-bugfix-for-literal-as-nttp.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-bugfix-for-ufcs-non-local.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-bugfix-for-ufcs-non-local.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/mixed-bugfix-for-ufcs-non-local.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-bugfix-for-ufcs-non-local.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-bugfix-for-ufcs-non-local.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-bugfix-for-ufcs-non-local.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-captures-in-expressions-and-postconditions.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-captures-in-expressions-and-postconditions.cpp.execution
new file mode 100644
index 000000000..dfca5b9a3
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-captures-in-expressions-and-postconditions.cpp.execution
@@ -0,0 +1,4 @@
+hello
+2022
+hello-ish
+2022-ish
diff --git a/regression-tests/test-results/msvc-2022/mixed-captures-in-expressions-and-postconditions.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-captures-in-expressions-and-postconditions.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-captures-in-expressions-and-postconditions.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-captures-in-expressions-and-postconditions.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-fixed-type-aliases.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-fixed-type-aliases.cpp.execution
new file mode 100644
index 000000000..3122e6030
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-fixed-type-aliases.cpp.execution
@@ -0,0 +1,4 @@
+true
+false
+"test.exe"
+true
diff --git a/regression-tests/test-results/msvc-2022/mixed-fixed-type-aliases.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-fixed-type-aliases.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-fixed-type-aliases.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-fixed-type-aliases.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-float-literals.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-float-literals.cpp.execution
new file mode 100644
index 000000000..6b15b12bc
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-float-literals.cpp.execution
@@ -0,0 +1,72 @@
+123
+123
+123
+123
+123
+123
+123456
+123
+123
+123
+123
+123
+123
+123456
+123456
+123456
+456
+456
+1e+10
+1e+10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+123456
+123456
+456
+456
+1e+10
+1e+10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+123
+123
+123
+123
+123
+123
+123456
+123
+123
+123
+123
+123
+123
+123456
+123456
+456
+1e+10
+1e+10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+123456
+456
+1e+10
+1e+10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
diff --git a/regression-tests/test-results/msvc-2022/mixed-float-literals.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-float-literals.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-float-literals.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-float-literals.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-forwarding.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-forwarding.cpp.execution
new file mode 100644
index 000000000..952feac3b
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-forwarding.cpp.execution
@@ -0,0 +1,12 @@
++X 1
++X 2
+copy X 1
+copy X 2
+copy X 1
+move X 2
++X 3
++X 4
+copy X 3
+copy X 4
+move X 3
+move X 4
diff --git a/regression-tests/test-results/msvc-2022/mixed-forwarding.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-forwarding.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-forwarding.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-forwarding.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-and-std-for-each.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-and-std-for-each.cpp.execution
new file mode 100644
index 000000000..728fbcc8f
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-and-std-for-each.cpp.execution
@@ -0,0 +1,2 @@
+hello-ish maybe
+2022-ish maybe
diff --git a/regression-tests/test-results/msvc-2022/mixed-function-expression-and-std-for-each.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-and-std-for-each.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-function-expression-and-std-for-each.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-and-std-for-each.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.execution
new file mode 100644
index 000000000..dfca5b9a3
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.execution
@@ -0,0 +1,4 @@
+hello
+2022
+hello-ish
+2022-ish
diff --git a/regression-tests/test-results/msvc-2022/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-and-std-ranges-for-each.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-and-std-ranges-for-each.cpp.execution
new file mode 100644
index 000000000..dfca5b9a3
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-and-std-ranges-for-each.cpp.execution
@@ -0,0 +1,4 @@
+hello
+2022
+hello-ish
+2022-ish
diff --git a/regression-tests/test-results/msvc-2022/mixed-function-expression-and-std-ranges-for-each.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-and-std-ranges-for-each.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-function-expression-and-std-ranges-for-each.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-and-std-ranges-for-each.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-with-pointer-capture.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-with-pointer-capture.cpp.execution
new file mode 100644
index 000000000..e9d6a083f
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-with-pointer-capture.cpp.execution
@@ -0,0 +1,6 @@
+
+hello
+
+2023
+hello-ish
+2023-ish
diff --git a/regression-tests/test-results/msvc-2022/mixed-function-expression-with-pointer-capture.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-with-pointer-capture.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-function-expression-with-pointer-capture.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-with-pointer-capture.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-with-repeated-capture.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-with-repeated-capture.cpp.execution
new file mode 100644
index 000000000..137aaec33
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-with-repeated-capture.cpp.execution
@@ -0,0 +1,6 @@
+
+hello
+
+2022
+hello-ish
+2022-ish
diff --git a/regression-tests/test-results/msvc-2022/mixed-function-expression-with-repeated-capture.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-with-repeated-capture.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-function-expression-with-repeated-capture.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-function-expression-with-repeated-capture.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-hello.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-hello.cpp.execution
new file mode 100644
index 000000000..c8848197e
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-hello.cpp.execution
@@ -0,0 +1 @@
+Hello [world]
diff --git a/regression-tests/test-results/msvc-2022/mixed-hello.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-hello.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-hello.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-hello.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-increment-decrement.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-increment-decrement.cpp.execution
new file mode 100644
index 000000000..6f42aeb32
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-increment-decrement.cpp.execution
@@ -0,0 +1,2 @@
+12234
+12234
diff --git a/regression-tests/test-results/msvc-2022/mixed-increment-decrement.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-increment-decrement.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-increment-decrement.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-increment-decrement.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-initialization-safety-3-contract-violation.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-initialization-safety-3-contract-violation.cpp.execution
new file mode 100644
index 000000000..e16104fe5
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-initialization-safety-3-contract-violation.cpp.execution
@@ -0,0 +1 @@
+Contract violation: fill: value must contain at least count elements
diff --git a/regression-tests/test-results/msvc-2022/mixed-initialization-safety-3-contract-violation.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-initialization-safety-3-contract-violation.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-initialization-safety-3-contract-violation.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-initialization-safety-3-contract-violation.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-initialization-safety-3.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-initialization-safety-3.cpp.execution
new file mode 100644
index 000000000..b261dd86c
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-initialization-safety-3.cpp.execution
@@ -0,0 +1 @@
+>> [xyzzy]
diff --git a/regression-tests/test-results/msvc-2022/mixed-initialization-safety-3.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-initialization-safety-3.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-initialization-safety-3.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-initialization-safety-3.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-inspect-templates.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-inspect-templates.cpp.execution
new file mode 100644
index 000000000..03cdf50b7
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-inspect-templates.cpp.execution
@@ -0,0 +1,8 @@
+inspected vec : std::vector
+inspected arr : std::array
+inspected var : std::variant
+inspected myt : my_type
+inspected vec : std::vector
+inspected arr : std::array
+inspected var : std::variant
+inspected myt : my_type
diff --git a/regression-tests/test-results/msvc-2022/mixed-inspect-templates.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-inspect-templates.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-inspect-templates.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-inspect-templates.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-inspect-values-2.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-inspect-values-2.cpp.execution
new file mode 100644
index 000000000..8372eadca
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-inspect-values-2.cpp.execution
@@ -0,0 +1,5 @@
+i is between 11 and 20
+less than 20
+i is between 10 and 30
+v is empty
+v is empty
diff --git a/regression-tests/test-results/msvc-2022/mixed-inspect-values-2.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-inspect-values-2.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-inspect-values-2.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-inspect-values-2.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-inspect-values.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-inspect-values.cpp.execution
new file mode 100644
index 000000000..e7130e0f8
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-inspect-values.cpp.execution
@@ -0,0 +1,12 @@
+rev dodgson
+(no match)
+the answer
+zero
+plugh
+zero
+1 or 2
+1 or 2
+3
+integer -42
+xyzzy
+(no match)
diff --git a/regression-tests/test-results/msvc-2022/mixed-inspect-values.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-inspect-values.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-inspect-values.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-inspect-values.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-inspect-with-typeof-of-template-arg-list.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-inspect-with-typeof-of-template-arg-list.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/mixed-inspect-with-typeof-of-template-arg-list.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-inspect-with-typeof-of-template-arg-list.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-inspect-with-typeof-of-template-arg-list.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-inspect-with-typeof-of-template-arg-list.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-intro-example-three-loops.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-intro-example-three-loops.cpp.execution
new file mode 100644
index 000000000..984a60a83
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-intro-example-three-loops.cpp.execution
@@ -0,0 +1,7 @@
+>> hello
+>> big
+>> world
+  **  **  **
+>> [hello]
+>> [big]
+>> [world]
diff --git a/regression-tests/test-results/msvc-2022/mixed-intro-example-three-loops.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-intro-example-three-loops.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-intro-example-three-loops.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-intro-example-three-loops.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-intro-for-with-counter-include-last.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-intro-for-with-counter-include-last.cpp.execution
new file mode 100644
index 000000000..05961867a
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-intro-for-with-counter-include-last.cpp.execution
@@ -0,0 +1,5 @@
+1 42
+2 84
+3 168
+4 336
+5 672
diff --git a/regression-tests/test-results/msvc-2022/mixed-intro-for-with-counter-include-last.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-intro-for-with-counter-include-last.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-intro-for-with-counter-include-last.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-intro-for-with-counter-include-last.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-lifetime-safety-and-null-contracts.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-lifetime-safety-and-null-contracts.cpp.execution
new file mode 100644
index 000000000..f4dd62312
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-lifetime-safety-and-null-contracts.cpp.execution
@@ -0,0 +1 @@
+sending error to my framework... [dynamic null dereference attempt detected]
diff --git a/regression-tests/test-results/msvc-2022/mixed-lifetime-safety-and-null-contracts.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-lifetime-safety-and-null-contracts.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-lifetime-safety-and-null-contracts.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-lifetime-safety-and-null-contracts.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-lifetime-safety-pointer-init-4.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-lifetime-safety-pointer-init-4.cpp.execution
new file mode 100644
index 000000000..7ee4d37b2
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-lifetime-safety-pointer-init-4.cpp.execution
@@ -0,0 +1 @@
+>> 42
diff --git a/regression-tests/test-results/msvc-2022/mixed-lifetime-safety-pointer-init-4.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-lifetime-safety-pointer-init-4.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-lifetime-safety-pointer-init-4.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-lifetime-safety-pointer-init-4.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-multiple-return-values.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-multiple-return-values.cpp.execution
new file mode 100644
index 000000000..b3fc65a7c
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-multiple-return-values.cpp.execution
@@ -0,0 +1,2 @@
+a is 10
+b is xyzzy
diff --git a/regression-tests/test-results/msvc-2022/mixed-multiple-return-values.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-multiple-return-values.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-multiple-return-values.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-multiple-return-values.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-out-destruction.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-out-destruction.cpp.execution
new file mode 100644
index 000000000..df8e3e4ff
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-out-destruction.cpp.execution
@@ -0,0 +1,21 @@
+enter main
+enter f00
+enter f01
++X 1
+exit f01
+-X 1
+exit f00
+
+enter f10
+enter f11
+enter f12
+enter f13
+enter f14
++X 2
+exit f14
+exit f13
+exit f12
+-X 2
+exit f11
+exit f10
+exit main
diff --git a/regression-tests/test-results/msvc-2022/mixed-out-destruction.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-out-destruction.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-out-destruction.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-out-destruction.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-parameter-passing-generic-out.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-parameter-passing-generic-out.cpp.execution
new file mode 100644
index 000000000..982a789cf
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-parameter-passing-generic-out.cpp.execution
@@ -0,0 +1,2 @@
+42
+exxxx
diff --git a/regression-tests/test-results/msvc-2022/mixed-parameter-passing-generic-out.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-parameter-passing-generic-out.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-parameter-passing-generic-out.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-parameter-passing-generic-out.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-parameter-passing-with-forward.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-parameter-passing-with-forward.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/mixed-parameter-passing-with-forward.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-parameter-passing-with-forward.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-parameter-passing-with-forward.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-parameter-passing-with-forward.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-parameter-passing.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-parameter-passing.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/mixed-parameter-passing.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-parameter-passing.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-parameter-passing.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-parameter-passing.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-postexpression-with-capture.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-postexpression-with-capture.cpp.execution
new file mode 100644
index 000000000..a17035eda
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-postexpression-with-capture.cpp.execution
@@ -0,0 +1,2 @@
+xyzzy and plugh
+xyzzyplugh
diff --git a/regression-tests/test-results/msvc-2022/mixed-postexpression-with-capture.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-postexpression-with-capture.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-postexpression-with-capture.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-postexpression-with-capture.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-postfix-expression-custom-formatting.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-postfix-expression-custom-formatting.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/mixed-postfix-expression-custom-formatting.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-postfix-expression-custom-formatting.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-postfix-expression-custom-formatting.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-postfix-expression-custom-formatting.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-string-interpolation.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-string-interpolation.cpp.execution
new file mode 100644
index 000000000..eebb290a9
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-string-interpolation.cpp.execution
@@ -0,0 +1,17 @@
+a = 2, b = (empty)
+a^2 + b = 46
+sv = my string_view
+osv = (empty)
+osv = string literal bound to optional string_view
+var = (empty)
+var = abracadabra
+var = 2.718280
+mypair = (12, 3.400000)
+tup1 = (12)
+tup2 = (12, 3.400000)
+tup3 = (12, 3.400000, 456)
+p = (first, (empty))
+t = (3.140000, (empty), (empty))
+vv = 0
+vv = (1, 2.300000)
+custom = (customize me - no cpp2::to_string overload exists for this type)
diff --git a/regression-tests/test-results/msvc-2022/mixed-string-interpolation.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-string-interpolation.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-string-interpolation.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-string-interpolation.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-test-parens.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-test-parens.cpp.execution
new file mode 100644
index 000000000..59967f29d
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-test-parens.cpp.execution
@@ -0,0 +1,3 @@
+11
+12
+13*14 is 182
diff --git a/regression-tests/test-results/msvc-2022/mixed-test-parens.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-test-parens.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-test-parens.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-test-parens.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-type-safety-1.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-type-safety-1.cpp.execution
new file mode 100644
index 000000000..f1a0d084e
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-type-safety-1.cpp.execution
@@ -0,0 +1,6 @@
+1.1 is int? false
+1   is int? true
+
+s* is Shape?  true
+s* is Circle? true
+s* is Square? false
diff --git a/regression-tests/test-results/msvc-2022/mixed-type-safety-1.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-type-safety-1.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-type-safety-1.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-type-safety-1.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/mixed-ufcs-multiple-template-arguments.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/mixed-ufcs-multiple-template-arguments.cpp.execution
new file mode 100644
index 000000000..dec75369f
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/mixed-ufcs-multiple-template-arguments.cpp.execution
@@ -0,0 +1,2 @@
+rain
+rain
diff --git a/regression-tests/test-results/msvc-2022/mixed-ufcs-multiple-template-arguments.cpp.output b/regression-tests/test-results/msvc-2022-c++20/mixed-ufcs-multiple-template-arguments.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/mixed-ufcs-multiple-template-arguments.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/mixed-ufcs-multiple-template-arguments.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-assert-expected-not-null.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-assert-expected-not-null.cpp.execution
new file mode 100644
index 000000000..8887aa1aa
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-assert-expected-not-null.cpp.execution
@@ -0,0 +1 @@
+Null safety violation: std::expected has an unexpected value
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-assert-expected-not-null.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-assert-expected-not-null.cpp.output
new file mode 100644
index 000000000..f2e012a95
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-assert-expected-not-null.cpp.output
@@ -0,0 +1,20 @@
+pure2-assert-expected-not-null.cpp
+pure2-assert-expected-not-null.cpp2(7): error C2039: 'expected': is not a member of 'std'
+predefined C++ types (compiler internal)(348): note: see declaration of 'std'
+pure2-assert-expected-not-null.cpp2(7): error C2062: type 'int' unexpected
+pure2-assert-expected-not-null.cpp2(7): error C2143: syntax error: missing ';' before '{'
+pure2-assert-expected-not-null.cpp2(7): error C2143: syntax error: missing ';' before '}'
+pure2-assert-expected-not-null.cpp2(9): error C2065: 'ex': undeclared identifier
+pure2-assert-expected-not-null.cpp2(9): error C2672: 'cpp2::impl::assert_not_null': no matching overloaded function found
+..\..\..\include\cpp2util.h(632): note: could be 'decltype(auto) cpp2::impl::assert_not_null(_T0 &&)'
+pure2-assert-expected-not-null.cpp2(14): error C2039: 'expected': is not a member of 'std'
+predefined C++ types (compiler internal)(348): note: see declaration of 'std'
+pure2-assert-expected-not-null.cpp2(14): error C2062: type 'int' unexpected
+pure2-assert-expected-not-null.cpp2(14): error C2143: syntax error: missing ';' before '{'
+pure2-assert-expected-not-null.cpp2(14): error C2039: 'unexpected': is not a member of 'std'
+predefined C++ types (compiler internal)(348): note: see declaration of 'std'
+pure2-assert-expected-not-null.cpp2(14): error C3861: 'unexpected': identifier not found
+pure2-assert-expected-not-null.cpp2(14): error C2143: syntax error: missing ';' before '}'
+pure2-assert-expected-not-null.cpp2(15): error C2065: 'ex': undeclared identifier
+pure2-assert-expected-not-null.cpp2(15): error C2672: 'cpp2::impl::assert_not_null': no matching overloaded function found
+..\..\..\include\cpp2util.h(632): note: could be 'decltype(auto) cpp2::impl::assert_not_null(_T0 &&)'
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-assert-optional-not-null.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-assert-optional-not-null.cpp.execution
new file mode 100644
index 000000000..c6aeba0fd
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-assert-optional-not-null.cpp.execution
@@ -0,0 +1 @@
+Null safety violation: std::optional does not contain a value
diff --git a/regression-tests/test-results/msvc-2022/pure2-assert-optional-not-null.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-assert-optional-not-null.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-assert-optional-not-null.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-assert-optional-not-null.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-assert-shared-ptr-not-null.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-assert-shared-ptr-not-null.cpp.execution
new file mode 100644
index 000000000..85aafbe6a
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-assert-shared-ptr-not-null.cpp.execution
@@ -0,0 +1 @@
+Null safety violation: std::shared_ptr is empty
diff --git a/regression-tests/test-results/msvc-2022/pure2-assert-shared-ptr-not-null.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-assert-shared-ptr-not-null.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-assert-shared-ptr-not-null.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-assert-shared-ptr-not-null.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-assert-unique-ptr-not-null.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-assert-unique-ptr-not-null.cpp.execution
new file mode 100644
index 000000000..af633d171
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-assert-unique-ptr-not-null.cpp.execution
@@ -0,0 +1 @@
+Null safety violation: std::unique_ptr is empty
diff --git a/regression-tests/test-results/msvc-2022/pure2-assert-unique-ptr-not-null.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-assert-unique-ptr-not-null.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-assert-unique-ptr-not-null.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-assert-unique-ptr-not-null.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-bounds-safety-span.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-bounds-safety-span.cpp.execution
new file mode 100644
index 000000000..3a0304fa2
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-bounds-safety-span.cpp.execution
@@ -0,0 +1,3 @@
+>> decorated
+>> hello
+>> world
diff --git a/regression-tests/test-results/msvc-2022/pure2-bounds-safety-span.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-bounds-safety-span.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-bounds-safety-span.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-bounds-safety-span.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-break-continue.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-break-continue.cpp.execution
new file mode 100644
index 000000000..c8af55771
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-break-continue.cpp.execution
@@ -0,0 +1,26 @@
+while_continue_inner:
+  00 inner 01 02 inner outer 10 inner 11 12 inner outer 20 inner 21 22 inner outer 
+while_continue_outer:
+  00 inner 01 10 inner 11 20 inner 21 
+while_break_inner:
+  00 inner 01 outer 10 inner 11 outer 20 inner 21 outer 
+while_break_outer:
+  00 inner 01 
+
+do_continue_inner:
+  00 inner 01 02 inner outer 10 inner 11 12 inner outer 20 inner 21 22 inner outer 
+do_continue_outer:
+  00 inner 01 10 inner 11 20 inner 21 
+do_break_inner:
+  00 inner 01 outer 10 inner 11 outer 20 inner 21 outer 
+do_break_outer:
+  00 inner 01 
+
+for_continue_inner:
+  00 inner 01 02 inner outer 10 inner 11 12 inner outer 20 inner 21 22 inner outer 
+for_continue_outer:
+  00 inner 01 10 inner 11 20 inner 21 
+for_break_inner:
+  00 inner 01 outer 10 inner 11 outer 20 inner 21 outer 
+for_break_outer:
+  00 inner 01 
\ No newline at end of file
diff --git a/regression-tests/test-results/msvc-2022/pure2-break-continue.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-break-continue.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-break-continue.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-break-continue.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-assign-expression-list.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-assign-expression-list.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-bugfix-for-assign-expression-list.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-assign-expression-list.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-bugfix-for-assign-expression-list.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-assign-expression-list.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-discard-precedence.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-discard-precedence.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-bugfix-for-discard-precedence.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-discard-precedence.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-bugfix-for-discard-precedence.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-discard-precedence.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-indexed-call.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-indexed-call.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-bugfix-for-indexed-call.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-indexed-call.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-bugfix-for-indexed-call.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-indexed-call.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-max-munch.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-max-munch.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-bugfix-for-max-munch.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-max-munch.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-bugfix-for-max-munch.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-max-munch.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-memberwise-base-assignment.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-memberwise-base-assignment.cpp.execution
new file mode 100644
index 000000000..566837e51
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-memberwise-base-assignment.cpp.execution
@@ -0,0 +1,2 @@
+(out this, that)
+(out this, that)
diff --git a/regression-tests/test-results/msvc-2022/pure2-bugfix-for-memberwise-base-assignment.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-memberwise-base-assignment.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-bugfix-for-memberwise-base-assignment.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-memberwise-base-assignment.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-name-lookup-and-value-decoration.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-name-lookup-and-value-decoration.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-bugfix-for-name-lookup-and-value-decoration.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-name-lookup-and-value-decoration.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-bugfix-for-name-lookup-and-value-decoration.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-name-lookup-and-value-decoration.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-non-local-function-expression.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-non-local-function-expression.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-bugfix-for-non-local-function-expression.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-non-local-function-expression.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-bugfix-for-non-local-function-expression.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-non-local-function-expression.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-non-local-initialization.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-non-local-initialization.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-bugfix-for-non-local-initialization.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-non-local-initialization.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-bugfix-for-non-local-initialization.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-non-local-initialization.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-optional-template-argument-list.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-optional-template-argument-list.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-bugfix-for-optional-template-argument-list.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-optional-template-argument-list.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-bugfix-for-optional-template-argument-list.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-optional-template-argument-list.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-requires-clause-in-forward-declaration.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-requires-clause-in-forward-declaration.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-bugfix-for-requires-clause-in-forward-declaration.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-requires-clause-in-forward-declaration.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-bugfix-for-requires-clause-in-forward-declaration.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-requires-clause-in-forward-declaration.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-requires-clause-unbraced-function-initializer.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-requires-clause-unbraced-function-initializer.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-bugfix-for-requires-clause-unbraced-function-initializer.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-requires-clause-unbraced-function-initializer.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-bugfix-for-requires-clause-unbraced-function-initializer.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-requires-clause-unbraced-function-initializer.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-template-argument.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-template-argument.cpp.execution
new file mode 100644
index 000000000..c508d5366
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-template-argument.cpp.execution
@@ -0,0 +1 @@
+false
diff --git a/regression-tests/test-results/msvc-2022/pure2-bugfix-for-template-argument.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-template-argument.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-bugfix-for-template-argument.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-template-argument.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-ufcs-arguments.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-ufcs-arguments.cpp.execution
new file mode 100644
index 000000000..0e41b7819
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-ufcs-arguments.cpp.execution
@@ -0,0 +1,4 @@
+0123456789
+9
+0123456789
+9
diff --git a/regression-tests/test-results/msvc-2022/pure2-bugfix-for-ufcs-arguments.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-ufcs-arguments.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-bugfix-for-ufcs-arguments.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-ufcs-arguments.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-ufcs-name-lookup.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-ufcs-name-lookup.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-bugfix-for-ufcs-name-lookup.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-ufcs-name-lookup.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-bugfix-for-ufcs-name-lookup.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-ufcs-name-lookup.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-ufcs-noexcept.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-ufcs-noexcept.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-bugfix-for-ufcs-noexcept.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-ufcs-noexcept.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-bugfix-for-ufcs-noexcept.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-ufcs-noexcept.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-ufcs-sfinae.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-ufcs-sfinae.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-bugfix-for-ufcs-sfinae.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-ufcs-sfinae.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-bugfix-for-ufcs-sfinae.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-ufcs-sfinae.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-unbraced-function-expression.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-unbraced-function-expression.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-bugfix-for-unbraced-function-expression.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-unbraced-function-expression.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-bugfix-for-unbraced-function-expression.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-unbraced-function-expression.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-variable-template.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-variable-template.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-bugfix-for-variable-template.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-variable-template.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-bugfix-for-variable-template.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-bugfix-for-variable-template.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-chained-comparisons.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-chained-comparisons.cpp.execution
new file mode 100644
index 000000000..b41a1bf75
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-chained-comparisons.cpp.execution
@@ -0,0 +1,27 @@
+0 0 0: true false false
+0 0 1: false false false
+0 0 2: false false false
+0 1 0: false false false
+0 1 1: false true false
+0 1 2: false true false
+0 2 0: false false false
+0 2 1: false false false
+0 2 2: false true false
+1 0 0: false false false
+1 0 1: false false false
+1 0 2: false false false
+1 1 0: false false true
+1 1 1: true false false
+1 1 2: false false false
+1 2 0: false false false
+1 2 1: false false false
+1 2 2: false true false
+2 0 0: false false false
+2 0 1: false false false
+2 0 2: false false false
+2 1 0: false false true
+2 1 1: false false false
+2 1 2: false false false
+2 2 0: false false true
+2 2 1: false false true
+2 2 2: true false false
diff --git a/regression-tests/test-results/msvc-2022/pure2-chained-comparisons.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-chained-comparisons.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-chained-comparisons.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-chained-comparisons.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-concept-definition.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-concept-definition.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-concept-definition.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-concept-definition.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-concept-definition.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-concept-definition.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-contracts.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-contracts.cpp.execution
new file mode 100644
index 000000000..e8a01cd98
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-contracts.cpp.execution
@@ -0,0 +1,3 @@
+1
+2
+4
diff --git a/regression-tests/test-results/msvc-2022/pure2-contracts.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-contracts.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-contracts.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-contracts.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-defaulted-comparisons-and-final-types.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-defaulted-comparisons-and-final-types.cpp.execution
new file mode 100644
index 000000000..9ff824547
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-defaulted-comparisons-and-final-types.cpp.execution
@@ -0,0 +1 @@
+less
\ No newline at end of file
diff --git a/regression-tests/test-results/msvc-2022/pure2-defaulted-comparisons-and-final-types.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-defaulted-comparisons-and-final-types.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-defaulted-comparisons-and-final-types.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-defaulted-comparisons-and-final-types.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-enum.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-enum.cpp.execution
new file mode 100644
index 000000000..6d9a33c28
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-enum.cpp.execution
@@ -0,0 +1,29 @@
+x.to_string() is clubs
+x2.to_string() is clubs
+with if else: clubs
+with inspect: clubs
+
+file_attributes::cached.get_raw_value() is 1
+file_attributes::current.get_raw_value() is 2
+file_attributes::obsolete.get_raw_value() is 4
+file_attributes::cached_and_current.get_raw_value() is 3
+f. get_raw_value() is 1
+f2.get_raw_value() is 1
+f  is (cached)
+f2 is (cached)
+f2 is (none)
+f2 is (cached)
+f. get_raw_value() is 1
+f2.get_raw_value() is 1
+f  is (f2) is true
+f2 is (f ) is true
+
+f  is (cached, current, obsolete, cached_and_current)
+f2 is (cached, current, cached_and_current)
+f. get_raw_value() is 7
+f2.get_raw_value() is 3
+f  == f2   is false
+f  is (f2) is false
+f2 is (f ) is false
+(f & f2) == f2 is true
+inspecting f: includes all f2's flags ('cached' and 'current')
diff --git a/regression-tests/test-results/msvc-2022/pure2-enum.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-enum.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-enum.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-enum.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-for-loop-range-with-lambda.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-for-loop-range-with-lambda.cpp.execution
new file mode 100644
index 000000000..19b3a90b2
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-for-loop-range-with-lambda.cpp.execution
@@ -0,0 +1 @@
+12345123451234512345
\ No newline at end of file
diff --git a/regression-tests/test-results/msvc-2022/pure2-for-loop-range-with-lambda.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-for-loop-range-with-lambda.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-for-loop-range-with-lambda.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-for-loop-range-with-lambda.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-forward-return.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-forward-return.cpp.execution
new file mode 100644
index 000000000..f259f2362
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-forward-return.cpp.execution
@@ -0,0 +1,2 @@
+4
+42
diff --git a/regression-tests/test-results/msvc-2022/pure2-forward-return.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-forward-return.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-forward-return.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-forward-return.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-function-multiple-forward-arguments.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-function-multiple-forward-arguments.cpp.execution
new file mode 100644
index 000000000..8baef1b4a
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-function-multiple-forward-arguments.cpp.execution
@@ -0,0 +1 @@
+abc
diff --git a/regression-tests/test-results/msvc-2022/pure2-function-multiple-forward-arguments.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-function-multiple-forward-arguments.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-function-multiple-forward-arguments.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-function-multiple-forward-arguments.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-hello.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-hello.cpp.execution
new file mode 100644
index 000000000..c8848197e
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-hello.cpp.execution
@@ -0,0 +1 @@
+Hello [world]
diff --git a/regression-tests/test-results/msvc-2022/pure2-hello.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-hello.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-hello.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-hello.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-initialization-safety-with-else-if.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-initialization-safety-with-else-if.cpp.execution
new file mode 100644
index 000000000..d00491fd7
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-initialization-safety-with-else-if.cpp.execution
@@ -0,0 +1 @@
+1
diff --git a/regression-tests/test-results/msvc-2022/pure2-initialization-safety-with-else-if.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-initialization-safety-with-else-if.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-initialization-safety-with-else-if.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-initialization-safety-with-else-if.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-inspect-expression-in-generic-function-multiple-types.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-inspect-expression-in-generic-function-multiple-types.cpp.execution
new file mode 100644
index 000000000..fd5a6cdff
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-inspect-expression-in-generic-function-multiple-types.cpp.execution
@@ -0,0 +1,8 @@
+                        double value is not an int or string
+     variant<int, int, double> value is not an int or string
+                           any value is "xyzzy"
+                 optional<int> value is not an int or string
+                           int value is integer 42
+     variant<int, int, double> value is integer 1
+                           any value is integer 2
+                 optional<int> value is integer 3
diff --git a/regression-tests/test-results/msvc-2022/pure2-inspect-expression-in-generic-function-multiple-types.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-inspect-expression-in-generic-function-multiple-types.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-inspect-expression-in-generic-function-multiple-types.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-inspect-expression-in-generic-function-multiple-types.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-inspect-expression-with-as-in-generic-function.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-inspect-expression-with-as-in-generic-function.cpp.execution
new file mode 100644
index 000000000..3cd874b4e
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-inspect-expression-with-as-in-generic-function.cpp.execution
@@ -0,0 +1,3 @@
+                        syzygy value is not an int
+                             1 value is 1
+                      1.100000 value is not an int
diff --git a/regression-tests/test-results/msvc-2022/pure2-inspect-expression-with-as-in-generic-function.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-inspect-expression-with-as-in-generic-function.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-inspect-expression-with-as-in-generic-function.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-inspect-expression-with-as-in-generic-function.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-inspect-fallback-with-variant-any-optional.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-inspect-fallback-with-variant-any-optional.cpp.execution
new file mode 100644
index 000000000..a5cbcefe9
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-inspect-fallback-with-variant-any-optional.cpp.execution
@@ -0,0 +1,11 @@
+
+All these cases satisfy "matches std::string"
+
+variant<int, int, string>
+    ... matches std::string
+
+string
+    ... matches std::string
+
+optional<string>
+    ... matches std::string
diff --git a/regression-tests/test-results/msvc-2022/pure2-inspect-fallback-with-variant-any-optional.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-inspect-fallback-with-variant-any-optional.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-inspect-fallback-with-variant-any-optional.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-inspect-fallback-with-variant-any-optional.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.execution
new file mode 100644
index 000000000..a2df8769d
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.execution
@@ -0,0 +1,17 @@
+
+All these cases satisfy "VOYDE AND EMPTIE"
+
+unique_ptr
+    ... VOYDE AND EMPTIE
+
+vector<int>::iterator
+    ... VOYDE AND EMPTIE
+
+variant<monostate, int, int, string>
+    ... VOYDE AND EMPTIE
+
+any
+    ... VOYDE AND EMPTIE
+
+optional<string>
+    ... VOYDE AND EMPTIE
diff --git a/regression-tests/test-results/msvc-2022/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-interpolation.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-interpolation.cpp.execution
new file mode 100644
index 000000000..850cfc6bf
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-interpolation.cpp.execution
@@ -0,0 +1,12 @@
+g0g0g
+0g0g
+0g0
+00
+"0"
+"0
+"
+
+pl(ug$h
+0pl(ug$h
+Dog kennel           color mauve      price 3.14       in stock = true
+Dog kennel           color mauve      price 3.14       in stock = true
diff --git a/regression-tests/test-results/msvc-2022/pure2-interpolation.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-interpolation.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-interpolation.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-interpolation.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-intro-example-hello-2022.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-intro-example-hello-2022.cpp.execution
new file mode 100644
index 000000000..8e8c5ee29
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-intro-example-hello-2022.cpp.execution
@@ -0,0 +1,2 @@
+>> [hello] - length 7
+>> [2022] - length 6
diff --git a/regression-tests/test-results/msvc-2022/pure2-intro-example-hello-2022.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-intro-example-hello-2022.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-intro-example-hello-2022.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-intro-example-hello-2022.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-intro-example-three-loops.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-intro-example-three-loops.cpp.execution
new file mode 100644
index 000000000..c218d85df
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-intro-example-three-loops.cpp.execution
@@ -0,0 +1,8 @@
+>> hello
+>> big
+>> world
+  **  **  **
+>> [hello]
+>> [big]
+>> [world]
+>> end of program
diff --git a/regression-tests/test-results/msvc-2022/pure2-intro-example-three-loops.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-intro-example-three-loops.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-intro-example-three-loops.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-intro-example-three-loops.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-is-with-free-functions-predicate.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-is-with-free-functions-predicate.cpp.execution
new file mode 100644
index 000000000..c8a07e430
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-is-with-free-functions-predicate.cpp.execution
@@ -0,0 +1,6 @@
+3.140000 is double bigger than 3
+3.140000 is bigger than 3
+42 is integer bigger than 3
+42 is bigger than 3
+a is integer bigger than 3
+a is bigger than 3
diff --git a/regression-tests/test-results/msvc-2022/pure2-is-with-free-functions-predicate.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-is-with-free-functions-predicate.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-is-with-free-functions-predicate.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-is-with-free-functions-predicate.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-is-with-unnamed-predicates.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-is-with-unnamed-predicates.cpp.execution
new file mode 100644
index 000000000..c8a07e430
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-is-with-unnamed-predicates.cpp.execution
@@ -0,0 +1,6 @@
+3.140000 is double bigger than 3
+3.140000 is bigger than 3
+42 is integer bigger than 3
+42 is bigger than 3
+a is integer bigger than 3
+a is bigger than 3
diff --git a/regression-tests/test-results/msvc-2022/pure2-is-with-unnamed-predicates.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-is-with-unnamed-predicates.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-is-with-unnamed-predicates.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-is-with-unnamed-predicates.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-is-with-variable-and-value.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-is-with-variable-and-value.cpp.execution
new file mode 100644
index 000000000..a9bc0680a
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-is-with-variable-and-value.cpp.execution
@@ -0,0 +1,9 @@
+3.14: unknown
+42: 42
+WithOp(): unknown
+WithGenOp(): unknown
+Cmp(): comparable
+std::string("text"): text
+"text": text
+std::string_view("text"): text
+:std::vector = ('t','e','x','t','\0'): unknown
diff --git a/regression-tests/test-results/msvc-2022/pure2-is-with-variable-and-value.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-is-with-variable-and-value.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-is-with-variable-and-value.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-is-with-variable-and-value.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-last-use.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-last-use.cpp.execution
new file mode 100644
index 000000000..4632e068d
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-last-use.cpp.execution
@@ -0,0 +1 @@
+123456
\ No newline at end of file
diff --git a/regression-tests/test-results/msvc-2022/pure2-last-use.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-last-use.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-last-use.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-last-use.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-look-up-parameter-across-unnamed-function.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-look-up-parameter-across-unnamed-function.cpp.execution
new file mode 100644
index 000000000..871727de1
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-look-up-parameter-across-unnamed-function.cpp.execution
@@ -0,0 +1 @@
+84
diff --git a/regression-tests/test-results/msvc-2022/pure2-look-up-parameter-across-unnamed-function.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-look-up-parameter-across-unnamed-function.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-look-up-parameter-across-unnamed-function.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-look-up-parameter-across-unnamed-function.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-main-args.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-main-args.cpp.execution
new file mode 100644
index 000000000..bd992e432
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-main-args.cpp.execution
@@ -0,0 +1,2 @@
+args.argc            is 1
+args.argv[0]         is test.exe
diff --git a/regression-tests/test-results/msvc-2022/pure2-main-args.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-main-args.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-main-args.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-main-args.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-more-wildcards.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-more-wildcards.cpp.execution
new file mode 100644
index 000000000..e37d6cb21
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-more-wildcards.cpp.execution
@@ -0,0 +1,2 @@
+yes, less
+yes, always
diff --git a/regression-tests/test-results/msvc-2022/pure2-more-wildcards.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-more-wildcards.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-more-wildcards.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-more-wildcards.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-print.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-print.cpp.execution
new file mode 100644
index 000000000..4e4b4573d
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-print.cpp.execution
@@ -0,0 +1,2 @@
+43
+forty-and-three
diff --git a/regression-tests/test-results/msvc-2022/pure2-print.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-print.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-print.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-print.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-raw-string-literal-and-interpolation.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-raw-string-literal-and-interpolation.cpp.execution
new file mode 100644
index 000000000..c48e2bd60
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-raw-string-literal-and-interpolation.cpp.execution
@@ -0,0 +1,17 @@
+this is a string
+raw string without interpolation
+this is raw string literal
+
+that can last for multiple
+
+lines
+this is raw string literal
+that can last for multiple
+lines
+42 R"(this can be added too)"
+calculations like m["one"] + m["two"] = 3 also works
+at the beginning of the line!!!
+
+
+    4242
+1.2.0.42
diff --git a/regression-tests/test-results/msvc-2022/pure2-raw-string-literal-and-interpolation.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-raw-string-literal-and-interpolation.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-raw-string-literal-and-interpolation.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-raw-string-literal-and-interpolation.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-repeated-call.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-repeated-call.cpp.execution
new file mode 100644
index 000000000..d81cc0710
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-repeated-call.cpp.execution
@@ -0,0 +1 @@
+42
diff --git a/regression-tests/test-results/msvc-2022/pure2-repeated-call.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-repeated-call.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-repeated-call.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-repeated-call.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-requires-clauses.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-requires-clauses.cpp.execution
new file mode 100644
index 000000000..105d7d9ad
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-requires-clauses.cpp.execution
@@ -0,0 +1 @@
+100
\ No newline at end of file
diff --git a/regression-tests/test-results/msvc-2022/pure2-requires-clauses.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-requires-clauses.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-requires-clauses.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-requires-clauses.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-return-tuple-operator.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-return-tuple-operator.cpp.execution
new file mode 100644
index 000000000..a3b7f9a55
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-return-tuple-operator.cpp.execution
@@ -0,0 +1,3 @@
+12 , 34
+23 , 45
+34 , 56
diff --git a/regression-tests/test-results/msvc-2022/pure2-return-tuple-operator.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-return-tuple-operator.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-return-tuple-operator.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-return-tuple-operator.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-statement-scope-parameters.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-statement-scope-parameters.cpp.execution
new file mode 100644
index 000000000..6fe5c7f6a
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-statement-scope-parameters.cpp.execution
@@ -0,0 +1,2 @@
+42
+43
diff --git a/regression-tests/test-results/msvc-2022/pure2-statement-scope-parameters.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-statement-scope-parameters.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-statement-scope-parameters.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-statement-scope-parameters.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-stdio-with-raii.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-stdio-with-raii.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-stdio-with-raii.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-stdio-with-raii.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-stdio-with-raii.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-stdio-with-raii.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-stdio.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-stdio.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-stdio.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-stdio.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-stdio.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-stdio.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-synthesize-rightshift-and-rightshifteq.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-synthesize-rightshift-and-rightshifteq.cpp.execution
new file mode 100644
index 000000000..b8626c4cf
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-synthesize-rightshift-and-rightshifteq.cpp.execution
@@ -0,0 +1 @@
+4
diff --git a/regression-tests/test-results/msvc-2022/pure2-synthesize-rightshift-and-rightshifteq.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-synthesize-rightshift-and-rightshifteq.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-synthesize-rightshift-and-rightshifteq.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-synthesize-rightshift-and-rightshifteq.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-template-parameter-lists.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-template-parameter-lists.cpp.execution
new file mode 100644
index 000000000..2861a7a20
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-template-parameter-lists.cpp.execution
@@ -0,0 +1,4 @@
+f1: 2
+f2: 4
+f3: 6
+f4: 8
diff --git a/regression-tests/test-results/msvc-2022/pure2-template-parameter-lists.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-template-parameter-lists.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-template-parameter-lists.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-template-parameter-lists.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-trailing-commas.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-trailing-commas.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-trailing-commas.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-trailing-commas.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-trailing-commas.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-trailing-commas.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-type-and-namespace-aliases.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-type-and-namespace-aliases.cpp.execution
new file mode 100644
index 000000000..9f037f474
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-type-and-namespace-aliases.cpp.execution
@@ -0,0 +1,2 @@
+xyzzy
+plugh
diff --git a/regression-tests/test-results/msvc-2022/pure2-type-and-namespace-aliases.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-type-and-namespace-aliases.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-type-and-namespace-aliases.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-type-and-namespace-aliases.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-type-safety-1.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-type-safety-1.cpp.execution
new file mode 100644
index 000000000..d1aa6265a
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-type-safety-1.cpp.execution
@@ -0,0 +1,9 @@
+                         double is int? false
+      variant<int, int, double> is int? false
+                            any is int? false
+                  optional<int> is int? false
+
+                            int is int? true
+      variant<int, int, double> is int? true
+                            any is int? true
+                  optional<int> is int? true
diff --git a/regression-tests/test-results/msvc-2022/pure2-type-safety-1.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-type-safety-1.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-type-safety-1.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-type-safety-1.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-type-safety-2-with-inspect-expression.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-type-safety-2-with-inspect-expression.cpp.execution
new file mode 100644
index 000000000..7045a6e79
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-type-safety-2-with-inspect-expression.cpp.execution
@@ -0,0 +1,8 @@
+                        double value is not an int
+     variant<int, double, int> value is not an int
+                           any value is not an int
+                 optional<int> value is not an int
+                           int value is 42
+     variant<int, double, int> value is 1
+                           any value is 2
+                 optional<int> value is 3
diff --git a/regression-tests/test-results/msvc-2022/pure2-type-safety-2-with-inspect-expression.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-type-safety-2-with-inspect-expression.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-type-safety-2-with-inspect-expression.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-type-safety-2-with-inspect-expression.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-types-basics.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-types-basics.cpp.execution
new file mode 100644
index 000000000..96b31fc42
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-types-basics.cpp.execution
@@ -0,0 +1,27 @@
+myclass: implicit from int
+    data: 1, more: 504
+N::myclass::f with 53
+N::myclass::nested::g
+f1: 2
+f2: 4
+f3: 6
+f4: 8
+myclass: explicit from string
+    data: 99, more: abracadabra
+myclass: default
+    data: 504, more: 3.141590
+myclass: from int and string
+    data: 77, more: hair1 plugh
+x's state before assignments:     data: 1, more: 504
+myclass: implicit from int
+    data: 84, more: 504
+myclass: explicit from string
+    data: 99, more: syzygy
+myclass: implicit from int
+    data: 84, more: 504
+myclass: explicit from string
+    data: 99, more: syzygy
+myclass: destructor
+myclass: destructor
+myclass: destructor
+myclass: destructor
diff --git a/regression-tests/test-results/msvc-2022/pure2-types-basics.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-types-basics.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-types-basics.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-types-basics.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-types-down-upcast.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-types-down-upcast.cpp.execution
new file mode 100644
index 000000000..20751af06
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-types-down-upcast.cpp.execution
@@ -0,0 +1,24 @@
+const foo 
+const foo 
+const foo 
+const foo 
+foo 
+foo 
+Call B const: 0.000000
+Call B const: 0.000000
+Call A const: 0
+Call B const: 0.000000
+Call B const: 0.000000
+Call A const: 0
+Call B mut: 0.000000
+Call B mut: 0.000000
+Call A mut: 0
+Call A const: 0
+Call B const: 0.000000
+Call A const: 0
+Call A const: 0
+Call B const: 0.000000
+Call A const: 0
+Call A mut: 0
+Call B mut: 0.000000
+Call A mut: 0
diff --git a/regression-tests/test-results/msvc-2022/pure2-types-down-upcast.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-types-down-upcast.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-types-down-upcast.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-types-down-upcast.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-types-inheritance.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-types-inheritance.cpp.execution
new file mode 100644
index 000000000..809430aaa
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-types-inheritance.cpp.execution
@@ -0,0 +1,5 @@
+Parsnip checks in for the day's shift
+printing: Parsnip lives at 123 Main St.
+-> [vcall: make_speak] Parsnip cracks a few jokes with a coworker
+-> [vcall: do_work] Parsnip carries some half-tonne crates of Fe2O3 to cold storage
+Tired but satisfied after another successful day, Parsnip checks out and goes home to their family
diff --git a/regression-tests/test-results/msvc-2022/pure2-types-inheritance.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-types-inheritance.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-types-inheritance.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-types-inheritance.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-types-order-independence-and-nesting.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-types-order-independence-and-nesting.cpp.execution
new file mode 100644
index 000000000..cc716cc8c
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-types-order-independence-and-nesting.cpp.execution
@@ -0,0 +1,5 @@
+made a safely initialized cycle
+leaving call to 'why(5)'
+leaving call to 'why(3)'
+leaving call to 'why(1)'
+hallo welt
diff --git a/regression-tests/test-results/msvc-2022/pure2-types-order-independence-and-nesting.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-types-order-independence-and-nesting.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-types-order-independence-and-nesting.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-types-order-independence-and-nesting.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-types-ordering-via-meta-functions.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-types-ordering-via-meta-functions.cpp.execution
new file mode 100644
index 000000000..54b3aab09
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-types-ordering-via-meta-functions.cpp.execution
@@ -0,0 +1 @@
+less more less
diff --git a/regression-tests/test-results/msvc-2022/pure2-types-ordering-via-meta-functions.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-types-ordering-via-meta-functions.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-types-ordering-via-meta-functions.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-types-ordering-via-meta-functions.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-1-provide-everything.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-1-provide-everything.cpp.execution
new file mode 100644
index 000000000..fc5a23bde
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-1-provide-everything.cpp.execution
@@ -0,0 +1,8 @@
+Function invoked        Call syntax   Results
+----------------------  ------------  ------------------------------------------------------
+ctor - from string      construct     [ Henry | 123 Ford Dr. ]
+ctor - from string      assign        [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   cp-construct  [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - move             mv-construct  [ Clara(CM) | 123 Ford Dr. ] <- [  |  ]
+assign - copy           cp-assign     [ Clara | 123 Ford Dr.(AC) ] <- [ Clara | 123 Ford Dr. ]
+assign - move           mv-assign     [ Clara | 123 Ford Dr. ] <- [  |  ]
diff --git a/regression-tests/test-results/msvc-2022/pure2-types-smf-and-that-1-provide-everything.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-1-provide-everything.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-types-smf-and-that-1-provide-everything.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-1-provide-everything.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.execution
new file mode 100644
index 000000000..7cbf0f869
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.execution
@@ -0,0 +1,8 @@
+Function invoked        Call syntax   Results
+----------------------  ------------  ------------------------------------------------------
+ctor - from string      construct     [ Henry | 123 Ford Dr. ]
+ctor - from string      assign        [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   cp-construct  [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - move             mv-construct  [ Clara(CM) | 123 Ford Dr. ] <- [  |  ]
+assign - copy           cp-assign     [ Clara | 123 Ford Dr.(AC) ] <- [ Clara | 123 Ford Dr. ]
+assign - copy           mv-assign     [ Clara | 123 Ford Dr.(AC) ] <- [  |  ]
diff --git a/regression-tests/test-results/msvc-2022/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.execution
new file mode 100644
index 000000000..541b2a0d9
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.execution
@@ -0,0 +1,8 @@
+Function invoked        Call syntax   Results
+----------------------  ------------  ------------------------------------------------------
+ctor - from string      construct     [ Henry | 123 Ford Dr. ]
+ctor - from string      assign        [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   cp-construct  [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - move             mv-construct  [ Clara(CM) | 123 Ford Dr. ] <- [  |  ]
+ctor - copy (GENERAL)   cp-assign     [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+assign - move           mv-assign     [ Clara | 123 Ford Dr. ] <- [  |  ]
diff --git a/regression-tests/test-results/msvc-2022/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.execution
new file mode 100644
index 000000000..24d4e763a
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.execution
@@ -0,0 +1,8 @@
+Function invoked        Call syntax   Results
+----------------------  ------------  ------------------------------------------------------
+ctor - from string      construct     [ Henry | 123 Ford Dr. ]
+ctor - from string      assign        [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   cp-construct  [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   mv-construct  [ Clara | 123 Ford Dr. ] <- [  |  ]
+assign - copy           cp-assign     [ Clara | 123 Ford Dr.(AC) ] <- [ Clara | 123 Ford Dr. ]
+assign - move           mv-assign     [ Clara | 123 Ford Dr. ] <- [  |  ]
diff --git a/regression-tests/test-results/msvc-2022/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution
new file mode 100644
index 000000000..c387c0371
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution
@@ -0,0 +1,8 @@
+Function invoked        Call syntax   Results
+----------------------  ------------  ------------------------------------------------------
+ctor - from string      construct     [ Henry | 123 Ford Dr. ]
+ctor - from string      assign        [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   cp-construct  [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   mv-construct  [ Clara | 123 Ford Dr. ] <- [  |  ]
+ctor - copy (GENERAL)   cp-assign     [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   mv-assign     [ Clara | 123 Ford Dr. ] <- [  |  ]
diff --git a/regression-tests/test-results/msvc-2022/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-types-that-parameters.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-types-that-parameters.cpp.execution
new file mode 100644
index 000000000..abd49e623
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-types-that-parameters.cpp.execution
@@ -0,0 +1,7 @@
+name 'Henry', addr '123 Ford Dr.'
+-----
+name 'Henry', addr '123 Ford Dr.'
+name 'Henry', addr '123 Ford Dr.'
+-----
+name '', addr ''
+name 'Henry', addr '123 Ford Dr.'
diff --git a/regression-tests/test-results/msvc-2022/pure2-types-that-parameters.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-types-that-parameters.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-types-that-parameters.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-types-that-parameters.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-types-value-types-via-meta-functions.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-types-value-types-via-meta-functions.cpp.execution
new file mode 100644
index 000000000..daee7bf51
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-types-value-types-via-meta-functions.cpp.execution
@@ -0,0 +1 @@
+less less less 
\ No newline at end of file
diff --git a/regression-tests/test-results/msvc-2022/pure2-types-value-types-via-meta-functions.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-types-value-types-via-meta-functions.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-types-value-types-via-meta-functions.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-types-value-types-via-meta-functions.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-ufcs-member-access-and-chaining.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-ufcs-member-access-and-chaining.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-ufcs-member-access-and-chaining.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-ufcs-member-access-and-chaining.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-ufcs-member-access-and-chaining.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-ufcs-member-access-and-chaining.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-union.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-union.cpp.execution
new file mode 100644
index 000000000..e52daad8e
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-union.cpp.execution
@@ -0,0 +1,4 @@
+sizeof(x) - alignof(x) == max(sizeof(fields)) is true
+(not a name)
+xyz
+42
\ No newline at end of file
diff --git a/regression-tests/test-results/msvc-2022/pure2-union.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-union.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-union.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-union.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-variadics.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-variadics.cpp.execution
new file mode 100644
index 000000000..53bc692f9
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/pure2-variadics.cpp.execution
@@ -0,0 +1,7 @@
+xyz
+plu
+abr
+3.14word-1500
+first all() returned false
+second all() returned true
+sum of (1, 2, 3, 100) is: 106
\ No newline at end of file
diff --git a/regression-tests/test-results/msvc-2022/pure2-variadics.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-variadics.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-variadics.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-variadics.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/pure2-various-string-literals.cpp.execution b/regression-tests/test-results/msvc-2022-c++20/pure2-various-string-literals.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022/pure2-various-string-literals.cpp.output b/regression-tests/test-results/msvc-2022-c++20/pure2-various-string-literals.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-various-string-literals.cpp.output
rename to regression-tests/test-results/msvc-2022-c++20/pure2-various-string-literals.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++20/run-tests-msvc-2022.bat b/regression-tests/test-results/msvc-2022-c++20/run-tests-msvc-2022.bat
new file mode 100644
index 000000000..60fe20f77
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/run-tests-msvc-2022.bat
@@ -0,0 +1,32 @@
+REM This is intended to be run in the /test-results/msvc-2022-c++20 directory
+REM in a VS2022 Command Prompt (which sets the path and other environment)
+REM
+REM After installing VS2022, to finish setting up std modules in your environment, run:
+REM     cl /std:c++20 /EHsc /nologo /W4 /MD /c "%VCToolsInstallDir%\modules\std.ixx"
+REM     cl /std:c++20 /EHsc /nologo /W4 /MD /c "%VCToolsInstallDir%\modules\std.compat.ixx"
+REM More info: https://learn.microsoft.com/en-us/cpp/cpp/tutorial-import-stl-named-module?view=msvc-170
+REM
+@echo off
+SETLOCAL EnableDelayedExpansion
+copy ..\*.cpp .
+del *.output
+set count=0
+set exe_count=0
+cl 1>NUL 2> MSVC-version.output
+for %%f in (*.cpp) do (
+    set /a count+=1
+    echo [!count!] Starting MSVC cl.exe %%f
+    cl.exe %%f -Fe"test" -nologo -std:c++20 -MD -EHsc -I ..\..\..\include std.obj std.compat.obj >> %%f.output 2>&1
+    del %%f
+    IF EXIST "test.exe" (
+        set /a exe_count+=1
+        echo.    Starting executable
+        test.exe > %%f.execution 2>&1
+        del test.exe
+    )
+)
+del pure2-*.obj mixed-*.obj *.exp *.lib
+echo.
+echo Done: %count% .cpp tests compiled
+echo.
+echo.      %exe_count% executables generated and run
diff --git a/regression-tests/test-results/msvc-2022-c++20/xyzzy b/regression-tests/test-results/msvc-2022-c++20/xyzzy
new file mode 100644
index 000000000..805bcb853
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++20/xyzzy
@@ -0,0 +1 @@
+Hello Fred with UFCS!
\ No newline at end of file
diff --git a/regression-tests/test-results/msvc-2022-c++latest/MSVC-version.output b/regression-tests/test-results/msvc-2022-c++latest/MSVC-version.output
new file mode 100644
index 000000000..ba2c3c80f
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/MSVC-version.output
@@ -0,0 +1,3 @@
+Microsoft (R) C/C++ Optimizing Compiler Version 19.39.33523 for x86
+Copyright (C) Microsoft Corporation.  All rights reserved.
+
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-allcpp1-hello.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-allcpp1-hello.cpp.execution
new file mode 100644
index 000000000..802992c42
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-allcpp1-hello.cpp.execution
@@ -0,0 +1 @@
+Hello world
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-allcpp1-hello.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-allcpp1-hello.cpp.output
new file mode 100644
index 000000000..86a375fbe
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-allcpp1-hello.cpp.output
@@ -0,0 +1 @@
+mixed-allcpp1-hello.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-as-for-variant-20-types.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-as-for-variant-20-types.cpp.execution
new file mode 100644
index 000000000..5e2c9d82e
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-as-for-variant-20-types.cpp.execution
@@ -0,0 +1,60 @@
+v as X< 0> = 0
+v as X< 1> = 1
+v as X< 2> = 2
+v as X< 3> = 3
+v as X< 4> = 4
+v as X< 5> = 5
+v as X< 6> = 6
+v as X< 7> = 7
+v as X< 8> = 8
+v as X< 9> = 9
+v as X<10> = 10
+v as X<11> = 11
+v as X<12> = 12
+v as X<13> = 13
+v as X<14> = 14
+v as X<15> = 15
+v as X<16> = 16
+v as X<17> = 17
+v as X<18> = 18
+v as X<19> = 19
+as_const(v) as X< 0> = 0
+as_const(v) as X< 1> = 1
+as_const(v) as X< 2> = 2
+as_const(v) as X< 3> = 3
+as_const(v) as X< 4> = 4
+as_const(v) as X< 5> = 5
+as_const(v) as X< 6> = 6
+as_const(v) as X< 7> = 7
+as_const(v) as X< 8> = 8
+as_const(v) as X< 9> = 9
+as_const(v) as X<10> = 10
+as_const(v) as X<11> = 11
+as_const(v) as X<12> = 12
+as_const(v) as X<13> = 13
+as_const(v) as X<14> = 14
+as_const(v) as X<15> = 15
+as_const(v) as X<16> = 16
+as_const(v) as X<17> = 17
+as_const(v) as X<18> = 18
+as_const(v) as X<19> = 19
+move(v) as X< 0> = 0
+move(v) as X< 1> = 1
+move(v) as X< 2> = 2
+move(v) as X< 3> = 3
+move(v) as X< 4> = 4
+move(v) as X< 5> = 5
+move(v) as X< 6> = 6
+move(v) as X< 7> = 7
+move(v) as X< 8> = 8
+move(v) as X< 9> = 9
+move(v) as X<10> = 10
+move(v) as X<11> = 11
+move(v) as X<12> = 12
+move(v) as X<13> = 13
+move(v) as X<14> = 14
+move(v) as X<15> = 15
+move(v) as X<16> = 16
+move(v) as X<17> = 17
+move(v) as X<18> = 18
+move(v) as X<19> = 19
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-as-for-variant-20-types.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-as-for-variant-20-types.cpp.output
new file mode 100644
index 000000000..5a1c1486a
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-as-for-variant-20-types.cpp.output
@@ -0,0 +1 @@
+mixed-as-for-variant-20-types.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-bounds-check.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-bounds-check.cpp.execution
new file mode 100644
index 000000000..8474b9159
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-bounds-check.cpp.execution
@@ -0,0 +1 @@
+Bounds safety violation: out of bounds access attempt detected - attempted access at index 5, [min,max] range is [0,4]
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-bounds-check.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-bounds-check.cpp.output
new file mode 100644
index 000000000..9ee4b1599
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-bounds-check.cpp.output
@@ -0,0 +1 @@
+mixed-bounds-check.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-bounds-safety-with-assert-2.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-bounds-safety-with-assert-2.cpp.execution
new file mode 100644
index 000000000..6330ca570
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-bounds-safety-with-assert-2.cpp.execution
@@ -0,0 +1,5 @@
+1
+44
+45
+46
+5
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-bounds-safety-with-assert-2.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-bounds-safety-with-assert-2.cpp.output
new file mode 100644
index 000000000..3ca6492a6
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-bounds-safety-with-assert-2.cpp.output
@@ -0,0 +1 @@
+mixed-bounds-safety-with-assert-2.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-bounds-safety-with-assert.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-bounds-safety-with-assert.cpp.execution
new file mode 100644
index 000000000..776dc1460
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-bounds-safety-with-assert.cpp.execution
@@ -0,0 +1 @@
+Bounds safety violation
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-bounds-safety-with-assert.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-bounds-safety-with-assert.cpp.output
new file mode 100644
index 000000000..e3a12dc06
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-bounds-safety-with-assert.cpp.output
@@ -0,0 +1 @@
+mixed-bounds-safety-with-assert.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.output
new file mode 100644
index 000000000..220d9f379
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp.output
@@ -0,0 +1 @@
+mixed-bugfix-for-cpp2-comment-cpp1-sequence.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-bugfix-for-literal-as-nttp.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-bugfix-for-literal-as-nttp.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-bugfix-for-literal-as-nttp.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-bugfix-for-literal-as-nttp.cpp.output
new file mode 100644
index 000000000..18fd52ba9
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-bugfix-for-literal-as-nttp.cpp.output
@@ -0,0 +1 @@
+mixed-bugfix-for-literal-as-nttp.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-bugfix-for-ufcs-non-local.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-bugfix-for-ufcs-non-local.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-bugfix-for-ufcs-non-local.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-bugfix-for-ufcs-non-local.cpp.output
new file mode 100644
index 000000000..f3f5e9025
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-bugfix-for-ufcs-non-local.cpp.output
@@ -0,0 +1 @@
+mixed-bugfix-for-ufcs-non-local.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-captures-in-expressions-and-postconditions.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-captures-in-expressions-and-postconditions.cpp.execution
new file mode 100644
index 000000000..dfca5b9a3
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-captures-in-expressions-and-postconditions.cpp.execution
@@ -0,0 +1,4 @@
+hello
+2022
+hello-ish
+2022-ish
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-captures-in-expressions-and-postconditions.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-captures-in-expressions-and-postconditions.cpp.output
new file mode 100644
index 000000000..3456b8e70
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-captures-in-expressions-and-postconditions.cpp.output
@@ -0,0 +1 @@
+mixed-captures-in-expressions-and-postconditions.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-fixed-type-aliases.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-fixed-type-aliases.cpp.execution
new file mode 100644
index 000000000..3122e6030
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-fixed-type-aliases.cpp.execution
@@ -0,0 +1,4 @@
+true
+false
+"test.exe"
+true
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-fixed-type-aliases.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-fixed-type-aliases.cpp.output
new file mode 100644
index 000000000..becf536ff
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-fixed-type-aliases.cpp.output
@@ -0,0 +1 @@
+mixed-fixed-type-aliases.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-float-literals.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-float-literals.cpp.execution
new file mode 100644
index 000000000..6b15b12bc
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-float-literals.cpp.execution
@@ -0,0 +1,72 @@
+123
+123
+123
+123
+123
+123
+123456
+123
+123
+123
+123
+123
+123
+123456
+123456
+123456
+456
+456
+1e+10
+1e+10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+123456
+123456
+456
+456
+1e+10
+1e+10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+123
+123
+123
+123
+123
+123
+123456
+123
+123
+123
+123
+123
+123
+123456
+123456
+456
+1e+10
+1e+10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
+123456
+456
+1e+10
+1e+10
+1e-10
+1e-10
+1e-10
+1e-10
+1e-10
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-float-literals.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-float-literals.cpp.output
new file mode 100644
index 000000000..88d9ba25d
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-float-literals.cpp.output
@@ -0,0 +1 @@
+mixed-float-literals.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-forwarding.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-forwarding.cpp.execution
new file mode 100644
index 000000000..952feac3b
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-forwarding.cpp.execution
@@ -0,0 +1,12 @@
++X 1
++X 2
+copy X 1
+copy X 2
+copy X 1
+move X 2
++X 3
++X 4
+copy X 3
+copy X 4
+move X 3
+move X 4
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-forwarding.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-forwarding.cpp.output
new file mode 100644
index 000000000..fde27181e
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-forwarding.cpp.output
@@ -0,0 +1 @@
+mixed-forwarding.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-and-std-for-each.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-and-std-for-each.cpp.execution
new file mode 100644
index 000000000..728fbcc8f
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-and-std-for-each.cpp.execution
@@ -0,0 +1,2 @@
+hello-ish maybe
+2022-ish maybe
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-and-std-for-each.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-and-std-for-each.cpp.output
new file mode 100644
index 000000000..07a403c21
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-and-std-for-each.cpp.output
@@ -0,0 +1 @@
+mixed-function-expression-and-std-for-each.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.execution
new file mode 100644
index 000000000..dfca5b9a3
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.execution
@@ -0,0 +1,4 @@
+hello
+2022
+hello-ish
+2022-ish
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.output
new file mode 100644
index 000000000..99262261e
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-and-std-ranges-for-each-with-capture.cpp.output
@@ -0,0 +1 @@
+mixed-function-expression-and-std-ranges-for-each-with-capture.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-and-std-ranges-for-each.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-and-std-ranges-for-each.cpp.execution
new file mode 100644
index 000000000..dfca5b9a3
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-and-std-ranges-for-each.cpp.execution
@@ -0,0 +1,4 @@
+hello
+2022
+hello-ish
+2022-ish
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-and-std-ranges-for-each.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-and-std-ranges-for-each.cpp.output
new file mode 100644
index 000000000..7a3f4c717
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-and-std-ranges-for-each.cpp.output
@@ -0,0 +1 @@
+mixed-function-expression-and-std-ranges-for-each.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-with-pointer-capture.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-with-pointer-capture.cpp.execution
new file mode 100644
index 000000000..e9d6a083f
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-with-pointer-capture.cpp.execution
@@ -0,0 +1,6 @@
+
+hello
+
+2023
+hello-ish
+2023-ish
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-with-pointer-capture.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-with-pointer-capture.cpp.output
new file mode 100644
index 000000000..82f6bcf2b
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-with-pointer-capture.cpp.output
@@ -0,0 +1 @@
+mixed-function-expression-with-pointer-capture.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-with-repeated-capture.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-with-repeated-capture.cpp.execution
new file mode 100644
index 000000000..137aaec33
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-with-repeated-capture.cpp.execution
@@ -0,0 +1,6 @@
+
+hello
+
+2022
+hello-ish
+2022-ish
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-with-repeated-capture.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-with-repeated-capture.cpp.output
new file mode 100644
index 000000000..b14c8c989
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-function-expression-with-repeated-capture.cpp.output
@@ -0,0 +1 @@
+mixed-function-expression-with-repeated-capture.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-hello.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-hello.cpp.execution
new file mode 100644
index 000000000..c8848197e
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-hello.cpp.execution
@@ -0,0 +1 @@
+Hello [world]
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-hello.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-hello.cpp.output
new file mode 100644
index 000000000..8f2ebaa7d
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-hello.cpp.output
@@ -0,0 +1 @@
+mixed-hello.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-increment-decrement.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-increment-decrement.cpp.execution
new file mode 100644
index 000000000..6f42aeb32
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-increment-decrement.cpp.execution
@@ -0,0 +1,2 @@
+12234
+12234
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-increment-decrement.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-increment-decrement.cpp.output
new file mode 100644
index 000000000..83e40edd0
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-increment-decrement.cpp.output
@@ -0,0 +1 @@
+mixed-increment-decrement.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-initialization-safety-3-contract-violation.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-initialization-safety-3-contract-violation.cpp.execution
new file mode 100644
index 000000000..e16104fe5
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-initialization-safety-3-contract-violation.cpp.execution
@@ -0,0 +1 @@
+Contract violation: fill: value must contain at least count elements
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-initialization-safety-3-contract-violation.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-initialization-safety-3-contract-violation.cpp.output
new file mode 100644
index 000000000..48ee8166d
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-initialization-safety-3-contract-violation.cpp.output
@@ -0,0 +1 @@
+mixed-initialization-safety-3-contract-violation.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-initialization-safety-3.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-initialization-safety-3.cpp.execution
new file mode 100644
index 000000000..b261dd86c
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-initialization-safety-3.cpp.execution
@@ -0,0 +1 @@
+>> [xyzzy]
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-initialization-safety-3.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-initialization-safety-3.cpp.output
new file mode 100644
index 000000000..ce1768dcb
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-initialization-safety-3.cpp.output
@@ -0,0 +1 @@
+mixed-initialization-safety-3.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-templates.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-templates.cpp.execution
new file mode 100644
index 000000000..03cdf50b7
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-templates.cpp.execution
@@ -0,0 +1,8 @@
+inspected vec : std::vector
+inspected arr : std::array
+inspected var : std::variant
+inspected myt : my_type
+inspected vec : std::vector
+inspected arr : std::array
+inspected var : std::variant
+inspected myt : my_type
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-templates.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-templates.cpp.output
new file mode 100644
index 000000000..ec741a8ce
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-templates.cpp.output
@@ -0,0 +1 @@
+mixed-inspect-templates.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-values-2.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-values-2.cpp.execution
new file mode 100644
index 000000000..8372eadca
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-values-2.cpp.execution
@@ -0,0 +1,5 @@
+i is between 11 and 20
+less than 20
+i is between 10 and 30
+v is empty
+v is empty
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-values-2.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-values-2.cpp.output
new file mode 100644
index 000000000..4a11a301e
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-values-2.cpp.output
@@ -0,0 +1 @@
+mixed-inspect-values-2.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-values.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-values.cpp.execution
new file mode 100644
index 000000000..e7130e0f8
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-values.cpp.execution
@@ -0,0 +1,12 @@
+rev dodgson
+(no match)
+the answer
+zero
+plugh
+zero
+1 or 2
+1 or 2
+3
+integer -42
+xyzzy
+(no match)
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-values.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-values.cpp.output
new file mode 100644
index 000000000..9ca15cda4
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-values.cpp.output
@@ -0,0 +1 @@
+mixed-inspect-values.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-with-typeof-of-template-arg-list.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-with-typeof-of-template-arg-list.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-with-typeof-of-template-arg-list.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-with-typeof-of-template-arg-list.cpp.output
new file mode 100644
index 000000000..0baee193e
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-inspect-with-typeof-of-template-arg-list.cpp.output
@@ -0,0 +1 @@
+mixed-inspect-with-typeof-of-template-arg-list.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-intro-example-three-loops.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-intro-example-three-loops.cpp.execution
new file mode 100644
index 000000000..984a60a83
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-intro-example-three-loops.cpp.execution
@@ -0,0 +1,7 @@
+>> hello
+>> big
+>> world
+  **  **  **
+>> [hello]
+>> [big]
+>> [world]
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-intro-example-three-loops.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-intro-example-three-loops.cpp.output
new file mode 100644
index 000000000..1874d7f40
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-intro-example-three-loops.cpp.output
@@ -0,0 +1 @@
+mixed-intro-example-three-loops.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-intro-for-with-counter-include-last.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-intro-for-with-counter-include-last.cpp.execution
new file mode 100644
index 000000000..05961867a
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-intro-for-with-counter-include-last.cpp.execution
@@ -0,0 +1,5 @@
+1 42
+2 84
+3 168
+4 336
+5 672
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-intro-for-with-counter-include-last.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-intro-for-with-counter-include-last.cpp.output
new file mode 100644
index 000000000..47d4e6fd7
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-intro-for-with-counter-include-last.cpp.output
@@ -0,0 +1 @@
+mixed-intro-for-with-counter-include-last.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-lifetime-safety-and-null-contracts.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-lifetime-safety-and-null-contracts.cpp.execution
new file mode 100644
index 000000000..f4dd62312
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-lifetime-safety-and-null-contracts.cpp.execution
@@ -0,0 +1 @@
+sending error to my framework... [dynamic null dereference attempt detected]
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-lifetime-safety-and-null-contracts.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-lifetime-safety-and-null-contracts.cpp.output
new file mode 100644
index 000000000..d94f9aa88
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-lifetime-safety-and-null-contracts.cpp.output
@@ -0,0 +1 @@
+mixed-lifetime-safety-and-null-contracts.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-lifetime-safety-pointer-init-4.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-lifetime-safety-pointer-init-4.cpp.execution
new file mode 100644
index 000000000..7ee4d37b2
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-lifetime-safety-pointer-init-4.cpp.execution
@@ -0,0 +1 @@
+>> 42
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-lifetime-safety-pointer-init-4.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-lifetime-safety-pointer-init-4.cpp.output
new file mode 100644
index 000000000..e5ad52049
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-lifetime-safety-pointer-init-4.cpp.output
@@ -0,0 +1 @@
+mixed-lifetime-safety-pointer-init-4.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-multiple-return-values.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-multiple-return-values.cpp.execution
new file mode 100644
index 000000000..b3fc65a7c
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-multiple-return-values.cpp.execution
@@ -0,0 +1,2 @@
+a is 10
+b is xyzzy
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-multiple-return-values.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-multiple-return-values.cpp.output
new file mode 100644
index 000000000..4840a9b5a
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-multiple-return-values.cpp.output
@@ -0,0 +1 @@
+mixed-multiple-return-values.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-out-destruction.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-out-destruction.cpp.execution
new file mode 100644
index 000000000..df8e3e4ff
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-out-destruction.cpp.execution
@@ -0,0 +1,21 @@
+enter main
+enter f00
+enter f01
++X 1
+exit f01
+-X 1
+exit f00
+
+enter f10
+enter f11
+enter f12
+enter f13
+enter f14
++X 2
+exit f14
+exit f13
+exit f12
+-X 2
+exit f11
+exit f10
+exit main
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-out-destruction.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-out-destruction.cpp.output
new file mode 100644
index 000000000..84944483c
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-out-destruction.cpp.output
@@ -0,0 +1 @@
+mixed-out-destruction.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-parameter-passing-generic-out.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-parameter-passing-generic-out.cpp.execution
new file mode 100644
index 000000000..982a789cf
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-parameter-passing-generic-out.cpp.execution
@@ -0,0 +1,2 @@
+42
+exxxx
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-parameter-passing-generic-out.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-parameter-passing-generic-out.cpp.output
new file mode 100644
index 000000000..b925af34c
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-parameter-passing-generic-out.cpp.output
@@ -0,0 +1 @@
+mixed-parameter-passing-generic-out.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-parameter-passing-with-forward.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-parameter-passing-with-forward.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-parameter-passing-with-forward.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-parameter-passing-with-forward.cpp.output
new file mode 100644
index 000000000..fed8c6373
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-parameter-passing-with-forward.cpp.output
@@ -0,0 +1 @@
+mixed-parameter-passing-with-forward.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-parameter-passing.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-parameter-passing.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-parameter-passing.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-parameter-passing.cpp.output
new file mode 100644
index 000000000..195c5a96b
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-parameter-passing.cpp.output
@@ -0,0 +1 @@
+mixed-parameter-passing.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-postexpression-with-capture.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-postexpression-with-capture.cpp.execution
new file mode 100644
index 000000000..a17035eda
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-postexpression-with-capture.cpp.execution
@@ -0,0 +1,2 @@
+xyzzy and plugh
+xyzzyplugh
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-postexpression-with-capture.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-postexpression-with-capture.cpp.output
new file mode 100644
index 000000000..6bc493909
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-postexpression-with-capture.cpp.output
@@ -0,0 +1 @@
+mixed-postexpression-with-capture.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-postfix-expression-custom-formatting.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-postfix-expression-custom-formatting.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-postfix-expression-custom-formatting.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-postfix-expression-custom-formatting.cpp.output
new file mode 100644
index 000000000..8cc7a3df4
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-postfix-expression-custom-formatting.cpp.output
@@ -0,0 +1 @@
+mixed-postfix-expression-custom-formatting.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-string-interpolation.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-string-interpolation.cpp.execution
new file mode 100644
index 000000000..eebb290a9
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-string-interpolation.cpp.execution
@@ -0,0 +1,17 @@
+a = 2, b = (empty)
+a^2 + b = 46
+sv = my string_view
+osv = (empty)
+osv = string literal bound to optional string_view
+var = (empty)
+var = abracadabra
+var = 2.718280
+mypair = (12, 3.400000)
+tup1 = (12)
+tup2 = (12, 3.400000)
+tup3 = (12, 3.400000, 456)
+p = (first, (empty))
+t = (3.140000, (empty), (empty))
+vv = 0
+vv = (1, 2.300000)
+custom = (customize me - no cpp2::to_string overload exists for this type)
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-string-interpolation.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-string-interpolation.cpp.output
new file mode 100644
index 000000000..814f0d905
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-string-interpolation.cpp.output
@@ -0,0 +1 @@
+mixed-string-interpolation.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-test-parens.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-test-parens.cpp.execution
new file mode 100644
index 000000000..59967f29d
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-test-parens.cpp.execution
@@ -0,0 +1,3 @@
+11
+12
+13*14 is 182
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-test-parens.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-test-parens.cpp.output
new file mode 100644
index 000000000..a2eae8e8e
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-test-parens.cpp.output
@@ -0,0 +1 @@
+mixed-test-parens.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-type-safety-1.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-type-safety-1.cpp.execution
new file mode 100644
index 000000000..f1a0d084e
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-type-safety-1.cpp.execution
@@ -0,0 +1,6 @@
+1.1 is int? false
+1   is int? true
+
+s* is Shape?  true
+s* is Circle? true
+s* is Square? false
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-type-safety-1.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-type-safety-1.cpp.output
new file mode 100644
index 000000000..c1f46ad66
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-type-safety-1.cpp.output
@@ -0,0 +1 @@
+mixed-type-safety-1.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-ufcs-multiple-template-arguments.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/mixed-ufcs-multiple-template-arguments.cpp.execution
new file mode 100644
index 000000000..dec75369f
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-ufcs-multiple-template-arguments.cpp.execution
@@ -0,0 +1,2 @@
+rain
+rain
diff --git a/regression-tests/test-results/msvc-2022-c++latest/mixed-ufcs-multiple-template-arguments.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/mixed-ufcs-multiple-template-arguments.cpp.output
new file mode 100644
index 000000000..4eae503ce
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/mixed-ufcs-multiple-template-arguments.cpp.output
@@ -0,0 +1 @@
+mixed-ufcs-multiple-template-arguments.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-assert-expected-not-null.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-assert-expected-not-null.cpp.execution
new file mode 100644
index 000000000..8887aa1aa
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-assert-expected-not-null.cpp.execution
@@ -0,0 +1 @@
+Null safety violation: std::expected has an unexpected value
diff --git a/regression-tests/test-results/msvc-2022/pure2-assert-expected-not-null.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-assert-expected-not-null.cpp.output
similarity index 100%
rename from regression-tests/test-results/msvc-2022/pure2-assert-expected-not-null.cpp.output
rename to regression-tests/test-results/msvc-2022-c++latest/pure2-assert-expected-not-null.cpp.output
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-assert-optional-not-null.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-assert-optional-not-null.cpp.execution
new file mode 100644
index 000000000..c6aeba0fd
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-assert-optional-not-null.cpp.execution
@@ -0,0 +1 @@
+Null safety violation: std::optional does not contain a value
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-assert-optional-not-null.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-assert-optional-not-null.cpp.output
new file mode 100644
index 000000000..ac5c880cd
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-assert-optional-not-null.cpp.output
@@ -0,0 +1 @@
+pure2-assert-optional-not-null.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-assert-shared-ptr-not-null.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-assert-shared-ptr-not-null.cpp.execution
new file mode 100644
index 000000000..85aafbe6a
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-assert-shared-ptr-not-null.cpp.execution
@@ -0,0 +1 @@
+Null safety violation: std::shared_ptr is empty
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-assert-shared-ptr-not-null.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-assert-shared-ptr-not-null.cpp.output
new file mode 100644
index 000000000..28a635c28
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-assert-shared-ptr-not-null.cpp.output
@@ -0,0 +1 @@
+pure2-assert-shared-ptr-not-null.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-assert-unique-ptr-not-null.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-assert-unique-ptr-not-null.cpp.execution
new file mode 100644
index 000000000..af633d171
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-assert-unique-ptr-not-null.cpp.execution
@@ -0,0 +1 @@
+Null safety violation: std::unique_ptr is empty
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-assert-unique-ptr-not-null.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-assert-unique-ptr-not-null.cpp.output
new file mode 100644
index 000000000..7d1d60b4e
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-assert-unique-ptr-not-null.cpp.output
@@ -0,0 +1 @@
+pure2-assert-unique-ptr-not-null.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bounds-safety-span.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-bounds-safety-span.cpp.execution
new file mode 100644
index 000000000..3a0304fa2
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bounds-safety-span.cpp.execution
@@ -0,0 +1,3 @@
+>> decorated
+>> hello
+>> world
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bounds-safety-span.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-bounds-safety-span.cpp.output
new file mode 100644
index 000000000..20a78540c
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bounds-safety-span.cpp.output
@@ -0,0 +1 @@
+pure2-bounds-safety-span.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-break-continue.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-break-continue.cpp.execution
new file mode 100644
index 000000000..c8af55771
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-break-continue.cpp.execution
@@ -0,0 +1,26 @@
+while_continue_inner:
+  00 inner 01 02 inner outer 10 inner 11 12 inner outer 20 inner 21 22 inner outer 
+while_continue_outer:
+  00 inner 01 10 inner 11 20 inner 21 
+while_break_inner:
+  00 inner 01 outer 10 inner 11 outer 20 inner 21 outer 
+while_break_outer:
+  00 inner 01 
+
+do_continue_inner:
+  00 inner 01 02 inner outer 10 inner 11 12 inner outer 20 inner 21 22 inner outer 
+do_continue_outer:
+  00 inner 01 10 inner 11 20 inner 21 
+do_break_inner:
+  00 inner 01 outer 10 inner 11 outer 20 inner 21 outer 
+do_break_outer:
+  00 inner 01 
+
+for_continue_inner:
+  00 inner 01 02 inner outer 10 inner 11 12 inner outer 20 inner 21 22 inner outer 
+for_continue_outer:
+  00 inner 01 10 inner 11 20 inner 21 
+for_break_inner:
+  00 inner 01 outer 10 inner 11 outer 20 inner 21 outer 
+for_break_outer:
+  00 inner 01 
\ No newline at end of file
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-break-continue.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-break-continue.cpp.output
new file mode 100644
index 000000000..80bde778d
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-break-continue.cpp.output
@@ -0,0 +1 @@
+pure2-break-continue.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-assign-expression-list.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-assign-expression-list.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-assign-expression-list.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-assign-expression-list.cpp.output
new file mode 100644
index 000000000..a6ae9f44a
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-assign-expression-list.cpp.output
@@ -0,0 +1 @@
+pure2-bugfix-for-assign-expression-list.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-discard-precedence.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-discard-precedence.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-discard-precedence.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-discard-precedence.cpp.output
new file mode 100644
index 000000000..783665cd0
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-discard-precedence.cpp.output
@@ -0,0 +1 @@
+pure2-bugfix-for-discard-precedence.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-indexed-call.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-indexed-call.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-indexed-call.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-indexed-call.cpp.output
new file mode 100644
index 000000000..1287434d5
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-indexed-call.cpp.output
@@ -0,0 +1 @@
+pure2-bugfix-for-indexed-call.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-max-munch.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-max-munch.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-max-munch.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-max-munch.cpp.output
new file mode 100644
index 000000000..566c4d693
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-max-munch.cpp.output
@@ -0,0 +1 @@
+pure2-bugfix-for-max-munch.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-memberwise-base-assignment.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-memberwise-base-assignment.cpp.execution
new file mode 100644
index 000000000..566837e51
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-memberwise-base-assignment.cpp.execution
@@ -0,0 +1,2 @@
+(out this, that)
+(out this, that)
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-memberwise-base-assignment.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-memberwise-base-assignment.cpp.output
new file mode 100644
index 000000000..8927219d7
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-memberwise-base-assignment.cpp.output
@@ -0,0 +1 @@
+pure2-bugfix-for-memberwise-base-assignment.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-name-lookup-and-value-decoration.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-name-lookup-and-value-decoration.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-name-lookup-and-value-decoration.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-name-lookup-and-value-decoration.cpp.output
new file mode 100644
index 000000000..f0a96b463
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-name-lookup-and-value-decoration.cpp.output
@@ -0,0 +1 @@
+pure2-bugfix-for-name-lookup-and-value-decoration.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-non-local-function-expression.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-non-local-function-expression.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-non-local-function-expression.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-non-local-function-expression.cpp.output
new file mode 100644
index 000000000..83fcf4bec
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-non-local-function-expression.cpp.output
@@ -0,0 +1 @@
+pure2-bugfix-for-non-local-function-expression.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-non-local-initialization.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-non-local-initialization.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-non-local-initialization.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-non-local-initialization.cpp.output
new file mode 100644
index 000000000..9fd01a3d0
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-non-local-initialization.cpp.output
@@ -0,0 +1 @@
+pure2-bugfix-for-non-local-initialization.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-optional-template-argument-list.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-optional-template-argument-list.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-optional-template-argument-list.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-optional-template-argument-list.cpp.output
new file mode 100644
index 000000000..d49488a64
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-optional-template-argument-list.cpp.output
@@ -0,0 +1 @@
+pure2-bugfix-for-optional-template-argument-list.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-requires-clause-in-forward-declaration.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-requires-clause-in-forward-declaration.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-requires-clause-in-forward-declaration.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-requires-clause-in-forward-declaration.cpp.output
new file mode 100644
index 000000000..fa01371ee
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-requires-clause-in-forward-declaration.cpp.output
@@ -0,0 +1 @@
+pure2-bugfix-for-requires-clause-in-forward-declaration.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-requires-clause-unbraced-function-initializer.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-requires-clause-unbraced-function-initializer.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-requires-clause-unbraced-function-initializer.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-requires-clause-unbraced-function-initializer.cpp.output
new file mode 100644
index 000000000..2e5bc8e9f
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-requires-clause-unbraced-function-initializer.cpp.output
@@ -0,0 +1 @@
+pure2-bugfix-for-requires-clause-unbraced-function-initializer.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-template-argument.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-template-argument.cpp.execution
new file mode 100644
index 000000000..c508d5366
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-template-argument.cpp.execution
@@ -0,0 +1 @@
+false
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-template-argument.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-template-argument.cpp.output
new file mode 100644
index 000000000..2b2d765d2
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-template-argument.cpp.output
@@ -0,0 +1 @@
+pure2-bugfix-for-template-argument.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-ufcs-arguments.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-ufcs-arguments.cpp.execution
new file mode 100644
index 000000000..0e41b7819
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-ufcs-arguments.cpp.execution
@@ -0,0 +1,4 @@
+0123456789
+9
+0123456789
+9
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-ufcs-arguments.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-ufcs-arguments.cpp.output
new file mode 100644
index 000000000..c20b9908a
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-ufcs-arguments.cpp.output
@@ -0,0 +1 @@
+pure2-bugfix-for-ufcs-arguments.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-ufcs-name-lookup.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-ufcs-name-lookup.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-ufcs-name-lookup.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-ufcs-name-lookup.cpp.output
new file mode 100644
index 000000000..cfe4625ad
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-ufcs-name-lookup.cpp.output
@@ -0,0 +1 @@
+pure2-bugfix-for-ufcs-name-lookup.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-ufcs-noexcept.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-ufcs-noexcept.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-ufcs-noexcept.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-ufcs-noexcept.cpp.output
new file mode 100644
index 000000000..c7322ce84
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-ufcs-noexcept.cpp.output
@@ -0,0 +1 @@
+pure2-bugfix-for-ufcs-noexcept.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-ufcs-sfinae.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-ufcs-sfinae.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-ufcs-sfinae.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-ufcs-sfinae.cpp.output
new file mode 100644
index 000000000..5d72f9750
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-ufcs-sfinae.cpp.output
@@ -0,0 +1 @@
+pure2-bugfix-for-ufcs-sfinae.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-unbraced-function-expression.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-unbraced-function-expression.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-unbraced-function-expression.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-unbraced-function-expression.cpp.output
new file mode 100644
index 000000000..57e058827
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-unbraced-function-expression.cpp.output
@@ -0,0 +1 @@
+pure2-bugfix-for-unbraced-function-expression.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-variable-template.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-variable-template.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-variable-template.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-variable-template.cpp.output
new file mode 100644
index 000000000..c58ee5a51
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-bugfix-for-variable-template.cpp.output
@@ -0,0 +1 @@
+pure2-bugfix-for-variable-template.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-chained-comparisons.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-chained-comparisons.cpp.execution
new file mode 100644
index 000000000..b41a1bf75
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-chained-comparisons.cpp.execution
@@ -0,0 +1,27 @@
+0 0 0: true false false
+0 0 1: false false false
+0 0 2: false false false
+0 1 0: false false false
+0 1 1: false true false
+0 1 2: false true false
+0 2 0: false false false
+0 2 1: false false false
+0 2 2: false true false
+1 0 0: false false false
+1 0 1: false false false
+1 0 2: false false false
+1 1 0: false false true
+1 1 1: true false false
+1 1 2: false false false
+1 2 0: false false false
+1 2 1: false false false
+1 2 2: false true false
+2 0 0: false false false
+2 0 1: false false false
+2 0 2: false false false
+2 1 0: false false true
+2 1 1: false false false
+2 1 2: false false false
+2 2 0: false false true
+2 2 1: false false true
+2 2 2: true false false
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-chained-comparisons.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-chained-comparisons.cpp.output
new file mode 100644
index 000000000..0f8d9e000
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-chained-comparisons.cpp.output
@@ -0,0 +1 @@
+pure2-chained-comparisons.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-concept-definition.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-concept-definition.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-concept-definition.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-concept-definition.cpp.output
new file mode 100644
index 000000000..1a6f1c663
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-concept-definition.cpp.output
@@ -0,0 +1 @@
+pure2-concept-definition.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-contracts.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-contracts.cpp.execution
new file mode 100644
index 000000000..e8a01cd98
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-contracts.cpp.execution
@@ -0,0 +1,3 @@
+1
+2
+4
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-contracts.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-contracts.cpp.output
new file mode 100644
index 000000000..c1ac8c9c7
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-contracts.cpp.output
@@ -0,0 +1 @@
+pure2-contracts.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-defaulted-comparisons-and-final-types.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-defaulted-comparisons-and-final-types.cpp.execution
new file mode 100644
index 000000000..9ff824547
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-defaulted-comparisons-and-final-types.cpp.execution
@@ -0,0 +1 @@
+less
\ No newline at end of file
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-defaulted-comparisons-and-final-types.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-defaulted-comparisons-and-final-types.cpp.output
new file mode 100644
index 000000000..a69d84fb4
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-defaulted-comparisons-and-final-types.cpp.output
@@ -0,0 +1 @@
+pure2-defaulted-comparisons-and-final-types.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-enum.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-enum.cpp.execution
new file mode 100644
index 000000000..6d9a33c28
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-enum.cpp.execution
@@ -0,0 +1,29 @@
+x.to_string() is clubs
+x2.to_string() is clubs
+with if else: clubs
+with inspect: clubs
+
+file_attributes::cached.get_raw_value() is 1
+file_attributes::current.get_raw_value() is 2
+file_attributes::obsolete.get_raw_value() is 4
+file_attributes::cached_and_current.get_raw_value() is 3
+f. get_raw_value() is 1
+f2.get_raw_value() is 1
+f  is (cached)
+f2 is (cached)
+f2 is (none)
+f2 is (cached)
+f. get_raw_value() is 1
+f2.get_raw_value() is 1
+f  is (f2) is true
+f2 is (f ) is true
+
+f  is (cached, current, obsolete, cached_and_current)
+f2 is (cached, current, cached_and_current)
+f. get_raw_value() is 7
+f2.get_raw_value() is 3
+f  == f2   is false
+f  is (f2) is false
+f2 is (f ) is false
+(f & f2) == f2 is true
+inspecting f: includes all f2's flags ('cached' and 'current')
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-enum.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-enum.cpp.output
new file mode 100644
index 000000000..81df03d19
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-enum.cpp.output
@@ -0,0 +1 @@
+pure2-enum.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-for-loop-range-with-lambda.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-for-loop-range-with-lambda.cpp.execution
new file mode 100644
index 000000000..19b3a90b2
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-for-loop-range-with-lambda.cpp.execution
@@ -0,0 +1 @@
+12345123451234512345
\ No newline at end of file
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-for-loop-range-with-lambda.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-for-loop-range-with-lambda.cpp.output
new file mode 100644
index 000000000..d6f0513de
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-for-loop-range-with-lambda.cpp.output
@@ -0,0 +1 @@
+pure2-for-loop-range-with-lambda.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-forward-return.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-forward-return.cpp.execution
new file mode 100644
index 000000000..f259f2362
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-forward-return.cpp.execution
@@ -0,0 +1,2 @@
+4
+42
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-forward-return.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-forward-return.cpp.output
new file mode 100644
index 000000000..03fb43cc8
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-forward-return.cpp.output
@@ -0,0 +1 @@
+pure2-forward-return.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-function-multiple-forward-arguments.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-function-multiple-forward-arguments.cpp.execution
new file mode 100644
index 000000000..8baef1b4a
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-function-multiple-forward-arguments.cpp.execution
@@ -0,0 +1 @@
+abc
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-function-multiple-forward-arguments.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-function-multiple-forward-arguments.cpp.output
new file mode 100644
index 000000000..fb0e5f1d4
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-function-multiple-forward-arguments.cpp.output
@@ -0,0 +1 @@
+pure2-function-multiple-forward-arguments.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-hello.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-hello.cpp.execution
new file mode 100644
index 000000000..c8848197e
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-hello.cpp.execution
@@ -0,0 +1 @@
+Hello [world]
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-hello.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-hello.cpp.output
new file mode 100644
index 000000000..83e848232
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-hello.cpp.output
@@ -0,0 +1 @@
+pure2-hello.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-initialization-safety-with-else-if.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-initialization-safety-with-else-if.cpp.execution
new file mode 100644
index 000000000..d00491fd7
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-initialization-safety-with-else-if.cpp.execution
@@ -0,0 +1 @@
+1
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-initialization-safety-with-else-if.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-initialization-safety-with-else-if.cpp.output
new file mode 100644
index 000000000..67638a3f2
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-initialization-safety-with-else-if.cpp.output
@@ -0,0 +1 @@
+pure2-initialization-safety-with-else-if.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-expression-in-generic-function-multiple-types.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-expression-in-generic-function-multiple-types.cpp.execution
new file mode 100644
index 000000000..fd5a6cdff
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-expression-in-generic-function-multiple-types.cpp.execution
@@ -0,0 +1,8 @@
+                        double value is not an int or string
+     variant<int, int, double> value is not an int or string
+                           any value is "xyzzy"
+                 optional<int> value is not an int or string
+                           int value is integer 42
+     variant<int, int, double> value is integer 1
+                           any value is integer 2
+                 optional<int> value is integer 3
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-expression-in-generic-function-multiple-types.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-expression-in-generic-function-multiple-types.cpp.output
new file mode 100644
index 000000000..9f384ba8b
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-expression-in-generic-function-multiple-types.cpp.output
@@ -0,0 +1 @@
+pure2-inspect-expression-in-generic-function-multiple-types.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-expression-with-as-in-generic-function.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-expression-with-as-in-generic-function.cpp.execution
new file mode 100644
index 000000000..3cd874b4e
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-expression-with-as-in-generic-function.cpp.execution
@@ -0,0 +1,3 @@
+                        syzygy value is not an int
+                             1 value is 1
+                      1.100000 value is not an int
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-expression-with-as-in-generic-function.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-expression-with-as-in-generic-function.cpp.output
new file mode 100644
index 000000000..9b94f7dc8
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-expression-with-as-in-generic-function.cpp.output
@@ -0,0 +1 @@
+pure2-inspect-expression-with-as-in-generic-function.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-fallback-with-variant-any-optional.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-fallback-with-variant-any-optional.cpp.execution
new file mode 100644
index 000000000..a5cbcefe9
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-fallback-with-variant-any-optional.cpp.execution
@@ -0,0 +1,11 @@
+
+All these cases satisfy "matches std::string"
+
+variant<int, int, string>
+    ... matches std::string
+
+string
+    ... matches std::string
+
+optional<string>
+    ... matches std::string
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-fallback-with-variant-any-optional.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-fallback-with-variant-any-optional.cpp.output
new file mode 100644
index 000000000..e37a9db99
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-fallback-with-variant-any-optional.cpp.output
@@ -0,0 +1 @@
+pure2-inspect-fallback-with-variant-any-optional.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.execution
new file mode 100644
index 000000000..a2df8769d
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.execution
@@ -0,0 +1,17 @@
+
+All these cases satisfy "VOYDE AND EMPTIE"
+
+unique_ptr
+    ... VOYDE AND EMPTIE
+
+vector<int>::iterator
+    ... VOYDE AND EMPTIE
+
+variant<monostate, int, int, string>
+    ... VOYDE AND EMPTIE
+
+any
+    ... VOYDE AND EMPTIE
+
+optional<string>
+    ... VOYDE AND EMPTIE
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.output
new file mode 100644
index 000000000..bb2e2b9a7
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-inspect-generic-void-empty-with-variant-any-optional.cpp.output
@@ -0,0 +1 @@
+pure2-inspect-generic-void-empty-with-variant-any-optional.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-interpolation.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-interpolation.cpp.execution
new file mode 100644
index 000000000..850cfc6bf
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-interpolation.cpp.execution
@@ -0,0 +1,12 @@
+g0g0g
+0g0g
+0g0
+00
+"0"
+"0
+"
+
+pl(ug$h
+0pl(ug$h
+Dog kennel           color mauve      price 3.14       in stock = true
+Dog kennel           color mauve      price 3.14       in stock = true
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-interpolation.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-interpolation.cpp.output
new file mode 100644
index 000000000..2b9f9aac2
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-interpolation.cpp.output
@@ -0,0 +1 @@
+pure2-interpolation.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-intro-example-hello-2022.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-intro-example-hello-2022.cpp.execution
new file mode 100644
index 000000000..8e8c5ee29
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-intro-example-hello-2022.cpp.execution
@@ -0,0 +1,2 @@
+>> [hello] - length 7
+>> [2022] - length 6
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-intro-example-hello-2022.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-intro-example-hello-2022.cpp.output
new file mode 100644
index 000000000..9fb86fbfe
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-intro-example-hello-2022.cpp.output
@@ -0,0 +1 @@
+pure2-intro-example-hello-2022.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-intro-example-three-loops.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-intro-example-three-loops.cpp.execution
new file mode 100644
index 000000000..c218d85df
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-intro-example-three-loops.cpp.execution
@@ -0,0 +1,8 @@
+>> hello
+>> big
+>> world
+  **  **  **
+>> [hello]
+>> [big]
+>> [world]
+>> end of program
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-intro-example-three-loops.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-intro-example-three-loops.cpp.output
new file mode 100644
index 000000000..34b8c3bdd
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-intro-example-three-loops.cpp.output
@@ -0,0 +1 @@
+pure2-intro-example-three-loops.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-is-with-free-functions-predicate.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-is-with-free-functions-predicate.cpp.execution
new file mode 100644
index 000000000..c8a07e430
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-is-with-free-functions-predicate.cpp.execution
@@ -0,0 +1,6 @@
+3.140000 is double bigger than 3
+3.140000 is bigger than 3
+42 is integer bigger than 3
+42 is bigger than 3
+a is integer bigger than 3
+a is bigger than 3
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-is-with-free-functions-predicate.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-is-with-free-functions-predicate.cpp.output
new file mode 100644
index 000000000..e2ffd5e62
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-is-with-free-functions-predicate.cpp.output
@@ -0,0 +1 @@
+pure2-is-with-free-functions-predicate.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-is-with-unnamed-predicates.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-is-with-unnamed-predicates.cpp.execution
new file mode 100644
index 000000000..c8a07e430
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-is-with-unnamed-predicates.cpp.execution
@@ -0,0 +1,6 @@
+3.140000 is double bigger than 3
+3.140000 is bigger than 3
+42 is integer bigger than 3
+42 is bigger than 3
+a is integer bigger than 3
+a is bigger than 3
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-is-with-unnamed-predicates.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-is-with-unnamed-predicates.cpp.output
new file mode 100644
index 000000000..67d1d00c8
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-is-with-unnamed-predicates.cpp.output
@@ -0,0 +1 @@
+pure2-is-with-unnamed-predicates.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-is-with-variable-and-value.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-is-with-variable-and-value.cpp.execution
new file mode 100644
index 000000000..a9bc0680a
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-is-with-variable-and-value.cpp.execution
@@ -0,0 +1,9 @@
+3.14: unknown
+42: 42
+WithOp(): unknown
+WithGenOp(): unknown
+Cmp(): comparable
+std::string("text"): text
+"text": text
+std::string_view("text"): text
+:std::vector = ('t','e','x','t','\0'): unknown
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-is-with-variable-and-value.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-is-with-variable-and-value.cpp.output
new file mode 100644
index 000000000..4358a6f73
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-is-with-variable-and-value.cpp.output
@@ -0,0 +1 @@
+pure2-is-with-variable-and-value.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-last-use.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-last-use.cpp.execution
new file mode 100644
index 000000000..4632e068d
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-last-use.cpp.execution
@@ -0,0 +1 @@
+123456
\ No newline at end of file
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-last-use.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-last-use.cpp.output
new file mode 100644
index 000000000..79703bb60
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-last-use.cpp.output
@@ -0,0 +1 @@
+pure2-last-use.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-look-up-parameter-across-unnamed-function.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-look-up-parameter-across-unnamed-function.cpp.execution
new file mode 100644
index 000000000..871727de1
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-look-up-parameter-across-unnamed-function.cpp.execution
@@ -0,0 +1 @@
+84
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-look-up-parameter-across-unnamed-function.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-look-up-parameter-across-unnamed-function.cpp.output
new file mode 100644
index 000000000..659b6c7cf
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-look-up-parameter-across-unnamed-function.cpp.output
@@ -0,0 +1 @@
+pure2-look-up-parameter-across-unnamed-function.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-main-args.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-main-args.cpp.execution
new file mode 100644
index 000000000..bd992e432
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-main-args.cpp.execution
@@ -0,0 +1,2 @@
+args.argc            is 1
+args.argv[0]         is test.exe
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-main-args.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-main-args.cpp.output
new file mode 100644
index 000000000..549285e8f
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-main-args.cpp.output
@@ -0,0 +1 @@
+pure2-main-args.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-more-wildcards.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-more-wildcards.cpp.execution
new file mode 100644
index 000000000..e37d6cb21
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-more-wildcards.cpp.execution
@@ -0,0 +1,2 @@
+yes, less
+yes, always
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-more-wildcards.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-more-wildcards.cpp.output
new file mode 100644
index 000000000..3f50e02c5
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-more-wildcards.cpp.output
@@ -0,0 +1 @@
+pure2-more-wildcards.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-print.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-print.cpp.execution
new file mode 100644
index 000000000..4e4b4573d
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-print.cpp.execution
@@ -0,0 +1,2 @@
+43
+forty-and-three
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-print.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-print.cpp.output
new file mode 100644
index 000000000..c64d03157
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-print.cpp.output
@@ -0,0 +1 @@
+pure2-print.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-raw-string-literal-and-interpolation.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-raw-string-literal-and-interpolation.cpp.execution
new file mode 100644
index 000000000..c48e2bd60
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-raw-string-literal-and-interpolation.cpp.execution
@@ -0,0 +1,17 @@
+this is a string
+raw string without interpolation
+this is raw string literal
+
+that can last for multiple
+
+lines
+this is raw string literal
+that can last for multiple
+lines
+42 R"(this can be added too)"
+calculations like m["one"] + m["two"] = 3 also works
+at the beginning of the line!!!
+
+
+    4242
+1.2.0.42
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-raw-string-literal-and-interpolation.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-raw-string-literal-and-interpolation.cpp.output
new file mode 100644
index 000000000..32c8700a6
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-raw-string-literal-and-interpolation.cpp.output
@@ -0,0 +1 @@
+pure2-raw-string-literal-and-interpolation.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-repeated-call.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-repeated-call.cpp.execution
new file mode 100644
index 000000000..d81cc0710
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-repeated-call.cpp.execution
@@ -0,0 +1 @@
+42
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-repeated-call.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-repeated-call.cpp.output
new file mode 100644
index 000000000..08c93faba
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-repeated-call.cpp.output
@@ -0,0 +1 @@
+pure2-repeated-call.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-requires-clauses.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-requires-clauses.cpp.execution
new file mode 100644
index 000000000..105d7d9ad
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-requires-clauses.cpp.execution
@@ -0,0 +1 @@
+100
\ No newline at end of file
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-requires-clauses.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-requires-clauses.cpp.output
new file mode 100644
index 000000000..fa1d3b023
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-requires-clauses.cpp.output
@@ -0,0 +1 @@
+pure2-requires-clauses.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-return-tuple-operator.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-return-tuple-operator.cpp.execution
new file mode 100644
index 000000000..a3b7f9a55
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-return-tuple-operator.cpp.execution
@@ -0,0 +1,3 @@
+12 , 34
+23 , 45
+34 , 56
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-return-tuple-operator.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-return-tuple-operator.cpp.output
new file mode 100644
index 000000000..04fe9fa9a
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-return-tuple-operator.cpp.output
@@ -0,0 +1 @@
+pure2-return-tuple-operator.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-statement-scope-parameters.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-statement-scope-parameters.cpp.execution
new file mode 100644
index 000000000..6fe5c7f6a
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-statement-scope-parameters.cpp.execution
@@ -0,0 +1,2 @@
+42
+43
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-statement-scope-parameters.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-statement-scope-parameters.cpp.output
new file mode 100644
index 000000000..9d578c804
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-statement-scope-parameters.cpp.output
@@ -0,0 +1 @@
+pure2-statement-scope-parameters.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-stdio-with-raii.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-stdio-with-raii.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-stdio-with-raii.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-stdio-with-raii.cpp.output
new file mode 100644
index 000000000..fd34d7948
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-stdio-with-raii.cpp.output
@@ -0,0 +1 @@
+pure2-stdio-with-raii.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-stdio.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-stdio.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-stdio.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-stdio.cpp.output
new file mode 100644
index 000000000..97b473624
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-stdio.cpp.output
@@ -0,0 +1 @@
+pure2-stdio.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-synthesize-rightshift-and-rightshifteq.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-synthesize-rightshift-and-rightshifteq.cpp.execution
new file mode 100644
index 000000000..b8626c4cf
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-synthesize-rightshift-and-rightshifteq.cpp.execution
@@ -0,0 +1 @@
+4
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-synthesize-rightshift-and-rightshifteq.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-synthesize-rightshift-and-rightshifteq.cpp.output
new file mode 100644
index 000000000..bf0609bb1
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-synthesize-rightshift-and-rightshifteq.cpp.output
@@ -0,0 +1 @@
+pure2-synthesize-rightshift-and-rightshifteq.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-template-parameter-lists.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-template-parameter-lists.cpp.execution
new file mode 100644
index 000000000..2861a7a20
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-template-parameter-lists.cpp.execution
@@ -0,0 +1,4 @@
+f1: 2
+f2: 4
+f3: 6
+f4: 8
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-template-parameter-lists.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-template-parameter-lists.cpp.output
new file mode 100644
index 000000000..d91fcd9db
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-template-parameter-lists.cpp.output
@@ -0,0 +1 @@
+pure2-template-parameter-lists.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-trailing-commas.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-trailing-commas.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-trailing-commas.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-trailing-commas.cpp.output
new file mode 100644
index 000000000..af6792f7a
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-trailing-commas.cpp.output
@@ -0,0 +1 @@
+pure2-trailing-commas.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-type-and-namespace-aliases.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-type-and-namespace-aliases.cpp.execution
new file mode 100644
index 000000000..9f037f474
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-type-and-namespace-aliases.cpp.execution
@@ -0,0 +1,2 @@
+xyzzy
+plugh
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-type-and-namespace-aliases.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-type-and-namespace-aliases.cpp.output
new file mode 100644
index 000000000..1aa549606
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-type-and-namespace-aliases.cpp.output
@@ -0,0 +1 @@
+pure2-type-and-namespace-aliases.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-type-safety-1.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-type-safety-1.cpp.execution
new file mode 100644
index 000000000..d1aa6265a
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-type-safety-1.cpp.execution
@@ -0,0 +1,9 @@
+                         double is int? false
+      variant<int, int, double> is int? false
+                            any is int? false
+                  optional<int> is int? false
+
+                            int is int? true
+      variant<int, int, double> is int? true
+                            any is int? true
+                  optional<int> is int? true
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-type-safety-1.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-type-safety-1.cpp.output
new file mode 100644
index 000000000..cdc655933
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-type-safety-1.cpp.output
@@ -0,0 +1 @@
+pure2-type-safety-1.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-type-safety-2-with-inspect-expression.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-type-safety-2-with-inspect-expression.cpp.execution
new file mode 100644
index 000000000..7045a6e79
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-type-safety-2-with-inspect-expression.cpp.execution
@@ -0,0 +1,8 @@
+                        double value is not an int
+     variant<int, double, int> value is not an int
+                           any value is not an int
+                 optional<int> value is not an int
+                           int value is 42
+     variant<int, double, int> value is 1
+                           any value is 2
+                 optional<int> value is 3
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-type-safety-2-with-inspect-expression.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-type-safety-2-with-inspect-expression.cpp.output
new file mode 100644
index 000000000..29bffd49b
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-type-safety-2-with-inspect-expression.cpp.output
@@ -0,0 +1 @@
+pure2-type-safety-2-with-inspect-expression.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-basics.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-basics.cpp.execution
new file mode 100644
index 000000000..96b31fc42
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-basics.cpp.execution
@@ -0,0 +1,27 @@
+myclass: implicit from int
+    data: 1, more: 504
+N::myclass::f with 53
+N::myclass::nested::g
+f1: 2
+f2: 4
+f3: 6
+f4: 8
+myclass: explicit from string
+    data: 99, more: abracadabra
+myclass: default
+    data: 504, more: 3.141590
+myclass: from int and string
+    data: 77, more: hair1 plugh
+x's state before assignments:     data: 1, more: 504
+myclass: implicit from int
+    data: 84, more: 504
+myclass: explicit from string
+    data: 99, more: syzygy
+myclass: implicit from int
+    data: 84, more: 504
+myclass: explicit from string
+    data: 99, more: syzygy
+myclass: destructor
+myclass: destructor
+myclass: destructor
+myclass: destructor
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-basics.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-basics.cpp.output
new file mode 100644
index 000000000..cde0a0595
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-basics.cpp.output
@@ -0,0 +1 @@
+pure2-types-basics.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-down-upcast.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-down-upcast.cpp.execution
new file mode 100644
index 000000000..20751af06
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-down-upcast.cpp.execution
@@ -0,0 +1,24 @@
+const foo 
+const foo 
+const foo 
+const foo 
+foo 
+foo 
+Call B const: 0.000000
+Call B const: 0.000000
+Call A const: 0
+Call B const: 0.000000
+Call B const: 0.000000
+Call A const: 0
+Call B mut: 0.000000
+Call B mut: 0.000000
+Call A mut: 0
+Call A const: 0
+Call B const: 0.000000
+Call A const: 0
+Call A const: 0
+Call B const: 0.000000
+Call A const: 0
+Call A mut: 0
+Call B mut: 0.000000
+Call A mut: 0
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-down-upcast.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-down-upcast.cpp.output
new file mode 100644
index 000000000..b2fe7c301
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-down-upcast.cpp.output
@@ -0,0 +1 @@
+pure2-types-down-upcast.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-inheritance.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-inheritance.cpp.execution
new file mode 100644
index 000000000..809430aaa
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-inheritance.cpp.execution
@@ -0,0 +1,5 @@
+Parsnip checks in for the day's shift
+printing: Parsnip lives at 123 Main St.
+-> [vcall: make_speak] Parsnip cracks a few jokes with a coworker
+-> [vcall: do_work] Parsnip carries some half-tonne crates of Fe2O3 to cold storage
+Tired but satisfied after another successful day, Parsnip checks out and goes home to their family
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-inheritance.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-inheritance.cpp.output
new file mode 100644
index 000000000..e5f505e71
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-inheritance.cpp.output
@@ -0,0 +1 @@
+pure2-types-inheritance.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-order-independence-and-nesting.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-order-independence-and-nesting.cpp.execution
new file mode 100644
index 000000000..cc716cc8c
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-order-independence-and-nesting.cpp.execution
@@ -0,0 +1,5 @@
+made a safely initialized cycle
+leaving call to 'why(5)'
+leaving call to 'why(3)'
+leaving call to 'why(1)'
+hallo welt
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-order-independence-and-nesting.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-order-independence-and-nesting.cpp.output
new file mode 100644
index 000000000..7c4ae790a
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-order-independence-and-nesting.cpp.output
@@ -0,0 +1 @@
+pure2-types-order-independence-and-nesting.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-ordering-via-meta-functions.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-ordering-via-meta-functions.cpp.execution
new file mode 100644
index 000000000..54b3aab09
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-ordering-via-meta-functions.cpp.execution
@@ -0,0 +1 @@
+less more less
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-ordering-via-meta-functions.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-ordering-via-meta-functions.cpp.output
new file mode 100644
index 000000000..6325b9ff6
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-ordering-via-meta-functions.cpp.output
@@ -0,0 +1 @@
+pure2-types-ordering-via-meta-functions.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-1-provide-everything.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-1-provide-everything.cpp.execution
new file mode 100644
index 000000000..fc5a23bde
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-1-provide-everything.cpp.execution
@@ -0,0 +1,8 @@
+Function invoked        Call syntax   Results
+----------------------  ------------  ------------------------------------------------------
+ctor - from string      construct     [ Henry | 123 Ford Dr. ]
+ctor - from string      assign        [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   cp-construct  [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - move             mv-construct  [ Clara(CM) | 123 Ford Dr. ] <- [  |  ]
+assign - copy           cp-assign     [ Clara | 123 Ford Dr.(AC) ] <- [ Clara | 123 Ford Dr. ]
+assign - move           mv-assign     [ Clara | 123 Ford Dr. ] <- [  |  ]
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-1-provide-everything.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-1-provide-everything.cpp.output
new file mode 100644
index 000000000..a2c28dc20
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-1-provide-everything.cpp.output
@@ -0,0 +1 @@
+pure2-types-smf-and-that-1-provide-everything.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.execution
new file mode 100644
index 000000000..7cbf0f869
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.execution
@@ -0,0 +1,8 @@
+Function invoked        Call syntax   Results
+----------------------  ------------  ------------------------------------------------------
+ctor - from string      construct     [ Henry | 123 Ford Dr. ]
+ctor - from string      assign        [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   cp-construct  [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - move             mv-construct  [ Clara(CM) | 123 Ford Dr. ] <- [  |  ]
+assign - copy           cp-assign     [ Clara | 123 Ford Dr.(AC) ] <- [ Clara | 123 Ford Dr. ]
+assign - copy           mv-assign     [ Clara | 123 Ford Dr.(AC) ] <- [  |  ]
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.output
new file mode 100644
index 000000000..72f67a0de
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp.output
@@ -0,0 +1 @@
+pure2-types-smf-and-that-2-provide-mvconstruct-and-cpassign.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.execution
new file mode 100644
index 000000000..541b2a0d9
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.execution
@@ -0,0 +1,8 @@
+Function invoked        Call syntax   Results
+----------------------  ------------  ------------------------------------------------------
+ctor - from string      construct     [ Henry | 123 Ford Dr. ]
+ctor - from string      assign        [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   cp-construct  [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - move             mv-construct  [ Clara(CM) | 123 Ford Dr. ] <- [  |  ]
+ctor - copy (GENERAL)   cp-assign     [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+assign - move           mv-assign     [ Clara | 123 Ford Dr. ] <- [  |  ]
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.output
new file mode 100644
index 000000000..c5d5b9553
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp.output
@@ -0,0 +1 @@
+pure2-types-smf-and-that-3-provide-mvconstruct-and-mvassign.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.execution
new file mode 100644
index 000000000..24d4e763a
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.execution
@@ -0,0 +1,8 @@
+Function invoked        Call syntax   Results
+----------------------  ------------  ------------------------------------------------------
+ctor - from string      construct     [ Henry | 123 Ford Dr. ]
+ctor - from string      assign        [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   cp-construct  [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   mv-construct  [ Clara | 123 Ford Dr. ] <- [  |  ]
+assign - copy           cp-assign     [ Clara | 123 Ford Dr.(AC) ] <- [ Clara | 123 Ford Dr. ]
+assign - move           mv-assign     [ Clara | 123 Ford Dr. ] <- [  |  ]
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.output
new file mode 100644
index 000000000..2663813b7
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp.output
@@ -0,0 +1 @@
+pure2-types-smf-and-that-4-provide-cpassign-and-mvassign.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution
new file mode 100644
index 000000000..c387c0371
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.execution
@@ -0,0 +1,8 @@
+Function invoked        Call syntax   Results
+----------------------  ------------  ------------------------------------------------------
+ctor - from string      construct     [ Henry | 123 Ford Dr. ]
+ctor - from string      assign        [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   cp-construct  [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   mv-construct  [ Clara | 123 Ford Dr. ] <- [  |  ]
+ctor - copy (GENERAL)   cp-assign     [ Clara | 123 Ford Dr. ] <- [ Clara | 123 Ford Dr. ]
+ctor - copy (GENERAL)   mv-assign     [ Clara | 123 Ford Dr. ] <- [  |  ]
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.output
new file mode 100644
index 000000000..7d0c7961d
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp.output
@@ -0,0 +1 @@
+pure2-types-smf-and-that-5-provide-nothing-but-general-case.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-that-parameters.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-that-parameters.cpp.execution
new file mode 100644
index 000000000..abd49e623
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-that-parameters.cpp.execution
@@ -0,0 +1,7 @@
+name 'Henry', addr '123 Ford Dr.'
+-----
+name 'Henry', addr '123 Ford Dr.'
+name 'Henry', addr '123 Ford Dr.'
+-----
+name '', addr ''
+name 'Henry', addr '123 Ford Dr.'
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-that-parameters.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-that-parameters.cpp.output
new file mode 100644
index 000000000..0c919b5e0
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-that-parameters.cpp.output
@@ -0,0 +1 @@
+pure2-types-that-parameters.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-value-types-via-meta-functions.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-value-types-via-meta-functions.cpp.execution
new file mode 100644
index 000000000..daee7bf51
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-value-types-via-meta-functions.cpp.execution
@@ -0,0 +1 @@
+less less less 
\ No newline at end of file
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-types-value-types-via-meta-functions.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-value-types-via-meta-functions.cpp.output
new file mode 100644
index 000000000..68b15f606
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-types-value-types-via-meta-functions.cpp.output
@@ -0,0 +1 @@
+pure2-types-value-types-via-meta-functions.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-ufcs-member-access-and-chaining.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-ufcs-member-access-and-chaining.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-ufcs-member-access-and-chaining.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-ufcs-member-access-and-chaining.cpp.output
new file mode 100644
index 000000000..bc5763e41
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-ufcs-member-access-and-chaining.cpp.output
@@ -0,0 +1 @@
+pure2-ufcs-member-access-and-chaining.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-union.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-union.cpp.execution
new file mode 100644
index 000000000..e52daad8e
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-union.cpp.execution
@@ -0,0 +1,4 @@
+sizeof(x) - alignof(x) == max(sizeof(fields)) is true
+(not a name)
+xyz
+42
\ No newline at end of file
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-union.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-union.cpp.output
new file mode 100644
index 000000000..e4baed02d
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-union.cpp.output
@@ -0,0 +1 @@
+pure2-union.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-variadics.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-variadics.cpp.execution
new file mode 100644
index 000000000..53bc692f9
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-variadics.cpp.execution
@@ -0,0 +1,7 @@
+xyz
+plu
+abr
+3.14word-1500
+first all() returned false
+second all() returned true
+sum of (1, 2, 3, 100) is: 106
\ No newline at end of file
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-variadics.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-variadics.cpp.output
new file mode 100644
index 000000000..01aa45382
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-variadics.cpp.output
@@ -0,0 +1 @@
+pure2-variadics.cpp
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-various-string-literals.cpp.execution b/regression-tests/test-results/msvc-2022-c++latest/pure2-various-string-literals.cpp.execution
new file mode 100644
index 000000000..e69de29bb
diff --git a/regression-tests/test-results/msvc-2022-c++latest/pure2-various-string-literals.cpp.output b/regression-tests/test-results/msvc-2022-c++latest/pure2-various-string-literals.cpp.output
new file mode 100644
index 000000000..2ae43b011
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/pure2-various-string-literals.cpp.output
@@ -0,0 +1 @@
+pure2-various-string-literals.cpp
diff --git a/regression-tests/test-results/msvc-2022/run-tests-msvc-2022.bat b/regression-tests/test-results/msvc-2022-c++latest/run-tests-msvc-2022.bat
similarity index 93%
rename from regression-tests/test-results/msvc-2022/run-tests-msvc-2022.bat
rename to regression-tests/test-results/msvc-2022-c++latest/run-tests-msvc-2022.bat
index 207dc61cd..270dfde12 100644
--- a/regression-tests/test-results/msvc-2022/run-tests-msvc-2022.bat
+++ b/regression-tests/test-results/msvc-2022-c++latest/run-tests-msvc-2022.bat
@@ -1,4 +1,4 @@
-REM This is intended to be run in the /test-results/msvc-2022 directory
+REM This is intended to be run in the /test-results/msvc-2022-c++latest directory
 REM in a VS2022 Command Prompt (which sets the path and other environment)
 REM
 REM After installing VS2022, to finish setting up std modules in your environment, run:
diff --git a/regression-tests/test-results/msvc-2022-c++latest/xyzzy b/regression-tests/test-results/msvc-2022-c++latest/xyzzy
new file mode 100644
index 000000000..805bcb853
--- /dev/null
+++ b/regression-tests/test-results/msvc-2022-c++latest/xyzzy
@@ -0,0 +1 @@
+Hello Fred with UFCS!
\ No newline at end of file
diff --git a/regression-tests/test-results/pure2-forward-return-diagnostics-error.cpp2.output b/regression-tests/test-results/pure2-forward-return-diagnostics-error.cpp2.output
index d1df1ddcd..1d1df28af 100644
--- a/regression-tests/test-results/pure2-forward-return-diagnostics-error.cpp2.output
+++ b/regression-tests/test-results/pure2-forward-return-diagnostics-error.cpp2.output
@@ -1,24 +1,24 @@
 pure2-forward-return-diagnostics-error.cpp2...
-pure2-forward-return-diagnostics-error.cpp2(1,28): error: a 'forward' return type cannot return a temporary variable
-pure2-forward-return-diagnostics-error.cpp2(2,28): error: a 'forward' return type cannot return a temporary variable
-pure2-forward-return-diagnostics-error.cpp2(3,28): error: a 'forward' return type cannot return a temporary variable
-pure2-forward-return-diagnostics-error.cpp2(4,28): error: a 'forward' return type cannot return a temporary variable
-pure2-forward-return-diagnostics-error.cpp2(5,28): error: a 'forward' return type cannot return a temporary variable
-pure2-forward-return-diagnostics-error.cpp2(6,28): error: a 'forward' return type cannot return a temporary variable
-pure2-forward-return-diagnostics-error.cpp2(7,28): error: a 'forward' return type cannot return a temporary variable
-pure2-forward-return-diagnostics-error.cpp2(8,28): error: a 'forward' return type cannot return a temporary variable
-pure2-forward-return-diagnostics-error.cpp2(9,28): error: a 'forward' return type cannot return a temporary variable
-pure2-forward-return-diagnostics-error.cpp2(10,28): error: a 'forward' return type cannot return a temporary variable
-pure2-forward-return-diagnostics-error.cpp2(11,28): error: a 'forward' return type cannot return a temporary variable
-pure2-forward-return-diagnostics-error.cpp2(12,28): error: a 'forward' return type cannot return a temporary variable
-pure2-forward-return-diagnostics-error.cpp2(13,28): error: a 'forward' return type cannot return a temporary variable
-pure2-forward-return-diagnostics-error.cpp2(14,28): error: a 'forward' return type cannot return a temporary variable
-pure2-forward-return-diagnostics-error.cpp2(15,28): error: a 'forward' return type cannot return a temporary variable
-pure2-forward-return-diagnostics-error.cpp2(16,28): error: a 'forward' return type cannot return a temporary variable
-pure2-forward-return-diagnostics-error.cpp2(17,28): error: a 'forward' return type cannot return a temporary variable
-pure2-forward-return-diagnostics-error.cpp2(18,28): error: a 'forward' return type cannot return a temporary variable
-pure2-forward-return-diagnostics-error.cpp2(19,28): error: a 'forward' return type cannot return a temporary variable
-pure2-forward-return-diagnostics-error.cpp2(20,28): error: a 'forward' return type cannot return a temporary variable
-pure2-forward-return-diagnostics-error.cpp2(21,28): error: a 'forward' return type cannot return a temporary variable
-pure2-forward-return-diagnostics-error.cpp2(22,28): error: a 'forward' return type cannot return a temporary variable
+pure2-forward-return-diagnostics-error.cpp2(1,28): error: a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'
+pure2-forward-return-diagnostics-error.cpp2(2,28): error: a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'
+pure2-forward-return-diagnostics-error.cpp2(3,28): error: a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'
+pure2-forward-return-diagnostics-error.cpp2(4,28): error: a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'
+pure2-forward-return-diagnostics-error.cpp2(5,28): error: a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'
+pure2-forward-return-diagnostics-error.cpp2(6,28): error: a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'
+pure2-forward-return-diagnostics-error.cpp2(7,28): error: a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'
+pure2-forward-return-diagnostics-error.cpp2(8,28): error: a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'
+pure2-forward-return-diagnostics-error.cpp2(9,28): error: a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'
+pure2-forward-return-diagnostics-error.cpp2(10,28): error: a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'
+pure2-forward-return-diagnostics-error.cpp2(11,28): error: a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'
+pure2-forward-return-diagnostics-error.cpp2(12,28): error: a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'
+pure2-forward-return-diagnostics-error.cpp2(13,28): error: a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'
+pure2-forward-return-diagnostics-error.cpp2(14,28): error: a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'
+pure2-forward-return-diagnostics-error.cpp2(15,28): error: a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'
+pure2-forward-return-diagnostics-error.cpp2(16,28): error: a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'
+pure2-forward-return-diagnostics-error.cpp2(17,28): error: a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'
+pure2-forward-return-diagnostics-error.cpp2(18,28): error: a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'
+pure2-forward-return-diagnostics-error.cpp2(19,28): error: a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'
+pure2-forward-return-diagnostics-error.cpp2(20,28): error: a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'
+pure2-forward-return-diagnostics-error.cpp2(21,28): error: a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'
+pure2-forward-return-diagnostics-error.cpp2(22,28): error: a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'
 
diff --git a/source/common.h b/source/common.h
index 692c06e0f..06e4608be 100644
--- a/source/common.h
+++ b/source/common.h
@@ -23,6 +23,14 @@
 #include "cpp2util.h"
 
 
+//===========================================================================
+//  When defined, builds cppfront in an instrumented (and slower) mode that
+//  prints more information under -_debug
+//===========================================================================
+
+//#define CPP2_DEBUG_BUILD
+
+
 //===========================================================================
 //  Common types
 //===========================================================================
@@ -1005,6 +1013,7 @@ class stable_vector
     }
 
     auto size() const -> size_t {
+        testing.enforce(!data.empty());
         return (data.size() - 1) * PageSize + data.back().size();
     }
 
@@ -1239,90 +1248,8 @@ std::vector<stackinstr::entry> stackinstr::largest;
 //  timer:  a little profiling timer to measure time spent in
 //          specific sections of code
 //
-//  This is a tool for cppfront developers to measure the run-time of
-//  specific parts of cppfront code.
-//
-//  Do still use a profiler too. But once you know where to measure,
-//  this has some advantages:
-//
-//    - Precise: It's easy to accurately measure specific parts of
-//      code across the run of the program, not relying on sampling to
-//      representatively hit those regions
-//
-//    - Flexible: You can have as many timers as you want, each with
-//      a clearly readable name, including nested timers (see example
-//      below)
-//
-//    - Portable: It's part of cppfront itself, no separate tool needed
-//
-//    - Integrated: Reports are printed automatically by -verbose
-//
-//  Usage guide
-//  -----------
-//
-//  To measure the total time spent in a specific section of code, create
-//  a scope_timer guard object in that scope and give it a readable
-//  string name that will remind you what it's measuring.
-//
-//  Example: Today I wanted to measure how long get_declaration_of is
-//  taking. So add this line at the start of that function's body:
-// 
-//     auto timer = scope_timer("get_declaration_of");
-//
-//  Recompile cppfront, then run with -verbose:
-//
-//      cppfront pure2-last-use.cpp2 -p -verb
-//
-//  Sample output:
-// 
-//      pure2-last-use.cpp2... ok (all Cpp2, passes safety checks)
-//         Cpp1  0 lines
-//         Cpp2  1,050 lines (100%)
-//         Time  1,629 ms
-//               1,120 ms in get_declaration_of
-//
-//  The first "Time:" is the total run time of the compiland. It is then
-//  followed by any active scope_timer names, in alphabetical order
-//  (you can choose names so that related timers appear together).
-//
-//  Here, this one function is taking most of the total runtime. It
-//  consists of two major loops, one run before the other, so we can
-//  measure the cost of each part, using names that will be
-//  reported together and in understandable order with -verbose:
-//
-//    - The function's first loop is to find a starting point, so
-//      enclose that in { } with a scope_timer:
-// 
-//          {
-//           auto timer1 = scope_timer("get_declaration_of step 1, initial find loop");
-//           /* the code I want to measure */
-//          }
-//
-//    - Immediately after that, install a second timer to measure the
-//      second loop which covers the entire rest of the function body:
-//
-//          auto timer2 = scope_timer("get_declaration_of step 2, rest of lookup");
-//          /* followed by the rest of the function's body */
-//
-//    - And, since it's easy, throw in a third timer to measure one
-//      sub-part of the step 2 loop... right before the 'move this'
-//      branch we can add this to measure the time spent in oly that
-//      trailing 1/3 of each loop iteration (starting and stopping the
-//      timer at those points in each loop iteration to measure just
-//      the sum of all those loop fragments):
-//
-//          auto timer2b = scope_timer("get_declaration_of step 2b, 'move this' branch");
-//
-//  Recompile cppfront and run again with -verbose... sample output:
-//
-//      pure2-last-use.cpp2... ok (all Cpp2, passes safety checks)
-//         Cpp1  0 lines
-//         Cpp2  1,050 lines (100%)
-//         Time  1,471 ms
-//               1,139 ms in get_declaration_of
-//                 540 ms in get_declaration_of step 1, initial find loop
-//                 567 ms in get_declaration_of step 2, rest of lookup
-//                 148 ms in get_declaration_of step 2b, 'move this' branch
+//  Use CPP2_SCOPE_TIMER("unique name") to declare local objects whose
+//  total timings will be reported in -verbose in CPP2_DEBUG_BUILD builds.
 //
 //-----------------------------------------------------------------------
 //
@@ -1359,16 +1286,19 @@ class timer
 
 static std::unordered_map<std::string_view, timer> timers;  // global named timers
 
-auto scope_timer(std::string_view name) -> std::shared_ptr<void> {
-    if (flag_internal_debug) {
-        timers[name].start();
-        auto stop = [=]{ timers[name].stop(); };
-        return std::make_shared<finally<decltype(stop)>>( std::move(stop) );
-    }
-    //  Else
-    return {};
+auto scope_timer(std::string_view name) {
+    timers[name].start();
+    auto stop = [=]{ timers[name].stop(); };
+    return finally( std::move(stop) );
 }
 
+#ifdef CPP2_DEBUG_BUILD
+#define CPP2_CONCAT(x,y)       x##y
+#define CPP2_UNIQUE_NAME(x,y)  CPP2_CONCAT(x,y)
+#define CPP2_SCOPE_TIMER(name) auto CPP2_UNIQUE_NAME(timer,__LINE__) = scope_timer(name)
+#else
+#define CPP2_SCOPE_TIMER(name)
+#endif
 
 }
 
diff --git a/source/parse.h b/source/parse.h
index 391a780ee..b8d404625 100644
--- a/source/parse.h
+++ b/source/parse.h
@@ -2479,6 +2479,18 @@ struct function_type_node
         return has_parameter_with_name_and_pass(s, passing_style::in);
     }
 
+    auto has_copy_parameter_named(std::string_view s) const
+        -> bool
+    {
+        return has_parameter_with_name_and_pass(s, passing_style::copy);
+    }
+
+    auto has_inout_parameter_named(std::string_view s) const
+        -> bool
+    {
+        return has_parameter_with_name_and_pass(s, passing_style::inout);
+    }
+
     auto has_out_parameter_named(std::string_view s) const
         -> bool
     {
@@ -2491,6 +2503,12 @@ struct function_type_node
         return has_parameter_with_name_and_pass(s, passing_style::move);
     }
 
+    auto has_forward_parameter_named(std::string_view s) const
+        -> bool
+    {
+        return has_parameter_with_name_and_pass(s, passing_style::forward);
+    }
+
     //  Internals
     //
     auto position() const
@@ -2923,6 +2941,24 @@ struct declaration_node
         return std::get<a_function>(type)->has_in_parameter_named(s);
     }
 
+    auto has_copy_parameter_named(std::string_view s) const
+        -> bool
+    {
+        if (!is_function()) {
+            return false;
+        }
+        return std::get<a_function>(type)->has_copy_parameter_named(s);
+    }
+
+    auto has_inout_parameter_named(std::string_view s) const
+        -> bool
+    {
+        if (!is_function()) {
+            return false;
+        }
+        return std::get<a_function>(type)->has_inout_parameter_named(s);
+    }
+
     auto has_out_parameter_named(std::string_view s) const
         -> bool
     {
@@ -2941,6 +2977,15 @@ struct declaration_node
         return std::get<a_function>(type)->has_move_parameter_named(s);
     }
 
+    auto has_forward_parameter_named(std::string_view s) const
+        -> bool
+    {
+        if (!is_function()) {
+            return false;
+        }
+        return std::get<a_function>(type)->has_forward_parameter_named(s);
+    }
+
     auto nth_parameter_type_name(int n) const
         -> std::string
     {
diff --git a/source/reflect.h b/source/reflect.h
index ec9877ffa..ad555bbb8 100644
--- a/source/reflect.h
+++ b/source/reflect.h
@@ -27,19 +27,19 @@ class declaration;
 #line 332 "reflect.h2"
 class function_declaration;
 
-#line 419 "reflect.h2"
+#line 422 "reflect.h2"
 class object_declaration;
 
-#line 455 "reflect.h2"
+#line 458 "reflect.h2"
 class type_declaration;
 
-#line 590 "reflect.h2"
+#line 593 "reflect.h2"
 class alias_declaration;
 
-#line 963 "reflect.h2"
+#line 966 "reflect.h2"
 class value_member_info;
 
-#line 1559 "reflect.h2"
+#line 1562 "reflect.h2"
 }
 
 }
@@ -321,8 +321,11 @@ class function_declaration
     public: [[nodiscard]] auto index_of_parameter_named(cpp2::impl::in<std::string_view> s) const& -> int;
     public: [[nodiscard]] auto has_parameter_named(cpp2::impl::in<std::string_view> s) const& -> bool;
     public: [[nodiscard]] auto has_in_parameter_named(cpp2::impl::in<std::string_view> s) const& -> bool;
+    public: [[nodiscard]] auto has_copy_parameter_named(cpp2::impl::in<std::string_view> s) const& -> bool;
+    public: [[nodiscard]] auto has_inout_parameter_named(cpp2::impl::in<std::string_view> s) const& -> bool;
     public: [[nodiscard]] auto has_out_parameter_named(cpp2::impl::in<std::string_view> s) const& -> bool;
     public: [[nodiscard]] auto has_move_parameter_named(cpp2::impl::in<std::string_view> s) const& -> bool;
+    public: [[nodiscard]] auto has_forward_parameter_named(cpp2::impl::in<std::string_view> s) const& -> bool;
     public: [[nodiscard]] auto first_parameter_name() const& -> std::string;
 
     public: [[nodiscard]] auto has_parameter_with_name_and_pass(cpp2::impl::in<std::string_view> s, cpp2::impl::in<passing_style> pass) const& -> bool;
@@ -354,7 +357,7 @@ class function_declaration
 
     public: [[nodiscard]] auto get_parameters() const& -> std::vector<object_declaration>;
 
-#line 390 "reflect.h2"
+#line 393 "reflect.h2"
     public: [[nodiscard]] auto is_binary_comparison_function() const& -> bool;
 
     public: auto default_to_virtual() & -> void;
@@ -365,103 +368,103 @@ class function_declaration
     public: function_declaration(function_declaration const& that);
 
 
-#line 413 "reflect.h2"
+#line 416 "reflect.h2"
 };
 
-#line 416 "reflect.h2"
+#line 419 "reflect.h2"
 //-----------------------------------------------------------------------
 //  Object declarations
 //
 class object_declaration
 : public declaration {
 
-#line 423 "reflect.h2"
+#line 426 "reflect.h2"
     public: explicit object_declaration(
 
         declaration_node* n_, 
         cpp2::impl::in<compiler_services> s
     );
 
-#line 433 "reflect.h2"
+#line 436 "reflect.h2"
     public: [[nodiscard]] auto is_const() const& -> bool;
     public: [[nodiscard]] auto has_wildcard_type() const& -> bool;
 
     public: [[nodiscard]] auto type() const& -> std::string;
 
-#line 443 "reflect.h2"
+#line 446 "reflect.h2"
     public: [[nodiscard]] auto initializer() const& -> std::string;
     public: object_declaration(object_declaration const& that);
 
 
-#line 449 "reflect.h2"
+#line 452 "reflect.h2"
 };
 
-#line 452 "reflect.h2"
+#line 455 "reflect.h2"
 //-----------------------------------------------------------------------
 //  Type declarations
 //
 class type_declaration
 : public declaration {
 
-#line 459 "reflect.h2"
+#line 462 "reflect.h2"
     public: explicit type_declaration(
 
         declaration_node* n_, 
         cpp2::impl::in<compiler_services> s
     );
 
-#line 469 "reflect.h2"
+#line 472 "reflect.h2"
     public: auto reserve_names(cpp2::impl::in<std::string_view> name, auto&& ...etc) const& -> void;
 
-#line 481 "reflect.h2"
+#line 484 "reflect.h2"
     public: [[nodiscard]] auto is_polymorphic() const& -> bool;
     public: [[nodiscard]] auto is_final() const& -> bool;
     public: [[nodiscard]] auto make_final() & -> bool;
 
     public: [[nodiscard]] auto get_member_functions() const& -> std::vector<function_declaration>;
 
-#line 496 "reflect.h2"
+#line 499 "reflect.h2"
     public: [[nodiscard]] auto get_member_functions_needing_initializer() const& -> std::vector<function_declaration>;
 
-#line 511 "reflect.h2"
+#line 514 "reflect.h2"
     public: [[nodiscard]] auto get_member_objects() const& -> std::vector<object_declaration>;
 
-#line 521 "reflect.h2"
+#line 524 "reflect.h2"
     public: [[nodiscard]] auto get_member_types() const& -> std::vector<type_declaration>;
 
-#line 531 "reflect.h2"
+#line 534 "reflect.h2"
     public: [[nodiscard]] auto get_member_aliases() const& -> std::vector<alias_declaration>;
 
-#line 541 "reflect.h2"
+#line 544 "reflect.h2"
     public: [[nodiscard]] auto get_members() const& -> std::vector<declaration>;
 struct query_declared_value_set_functions_ret { bool out_this_in_that; bool out_this_move_that; bool inout_this_in_that; bool inout_this_move_that; };
 
 
 
-#line 551 "reflect.h2"
+#line 554 "reflect.h2"
     public: [[nodiscard]] auto query_declared_value_set_functions() const& -> query_declared_value_set_functions_ret;
 
-#line 566 "reflect.h2"
+#line 569 "reflect.h2"
     public: auto add_member(cpp2::impl::in<std::string_view> source) & -> void;
 
-#line 580 "reflect.h2"
+#line 583 "reflect.h2"
     public: auto remove_marked_members() & -> void;
     public: auto remove_all_members() & -> void;
 
     public: auto disable_member_function_generation() & -> void;
     public: type_declaration(type_declaration const& that);
 
-#line 584 "reflect.h2"
+#line 587 "reflect.h2"
 };
 
-#line 587 "reflect.h2"
+#line 590 "reflect.h2"
 //-----------------------------------------------------------------------
 //  Alias declarations
 //
 class alias_declaration
 : public declaration {
 
-#line 594 "reflect.h2"
+#line 597 "reflect.h2"
     public: explicit alias_declaration(
 
         declaration_node* n_, 
@@ -470,10 +473,10 @@ class alias_declaration
     public: alias_declaration(alias_declaration const& that);
 
 
-#line 603 "reflect.h2"
+#line 606 "reflect.h2"
 };
 
-#line 606 "reflect.h2"
+#line 609 "reflect.h2"
 //-----------------------------------------------------------------------
 //
 //  Metafunctions - these are hardwired for now until we get to the
@@ -488,7 +491,7 @@ class alias_declaration
 //
 auto add_virtual_destructor(meta::type_declaration& t) -> void;
 
-#line 624 "reflect.h2"
+#line 627 "reflect.h2"
 //-----------------------------------------------------------------------
 //
 //      "... an abstract base class defines an interface ..."
@@ -503,7 +506,7 @@ auto add_virtual_destructor(meta::type_declaration& t) -> void;
 //
 auto interface(meta::type_declaration& t) -> void;
 
-#line 663 "reflect.h2"
+#line 666 "reflect.h2"
 //-----------------------------------------------------------------------
 //
 //     "C.35: A base class destructor should be either public and
@@ -525,7 +528,7 @@ auto interface(meta::type_declaration& t) -> void;
 //
 auto polymorphic_base(meta::type_declaration& t) -> void;
 
-#line 707 "reflect.h2"
+#line 710 "reflect.h2"
 //-----------------------------------------------------------------------
 //
 //     "... A totally ordered type ... requires operator<=> that
@@ -551,7 +554,7 @@ auto ordered_impl(
     cpp2::impl::in<std::string_view> ordering// must be "strong_ordering" etc.
 ) -> void;
 
-#line 751 "reflect.h2"
+#line 754 "reflect.h2"
 //-----------------------------------------------------------------------
 //  ordered - a totally ordered type
 //
@@ -559,19 +562,19 @@ auto ordered_impl(
 //
 auto ordered(meta::type_declaration& t) -> void;
 
-#line 761 "reflect.h2"
+#line 764 "reflect.h2"
 //-----------------------------------------------------------------------
 //  weakly_ordered - a weakly ordered type
 //
 auto weakly_ordered(meta::type_declaration& t) -> void;
 
-#line 769 "reflect.h2"
+#line 772 "reflect.h2"
 //-----------------------------------------------------------------------
 //  partially_ordered - a partially ordered type
 //
 auto partially_ordered(meta::type_declaration& t) -> void;
 
-#line 778 "reflect.h2"
+#line 781 "reflect.h2"
 //-----------------------------------------------------------------------
 //
 //     "A value is ... a regular type. It must have all public
@@ -590,7 +593,7 @@ auto partially_ordered(meta::type_declaration& t) -> void;
 //
 auto copyable(meta::type_declaration& t) -> void;
 
-#line 815 "reflect.h2"
+#line 818 "reflect.h2"
 //-----------------------------------------------------------------------
 //
 //  basic_value
@@ -600,7 +603,7 @@ auto copyable(meta::type_declaration& t) -> void;
 //
 auto basic_value(meta::type_declaration& t) -> void;
 
-#line 840 "reflect.h2"
+#line 843 "reflect.h2"
 //-----------------------------------------------------------------------
 //
 //     "A 'value' is a totally ordered basic_value..."
@@ -613,13 +616,13 @@ auto basic_value(meta::type_declaration& t) -> void;
 //
 auto value(meta::type_declaration& t) -> void;
 
-#line 856 "reflect.h2"
+#line 859 "reflect.h2"
 auto weakly_ordered_value(meta::type_declaration& t) -> void;
 
-#line 862 "reflect.h2"
+#line 865 "reflect.h2"
 auto partially_ordered_value(meta::type_declaration& t) -> void;
 
-#line 869 "reflect.h2"
+#line 872 "reflect.h2"
 //-----------------------------------------------------------------------
 //
 //     C.20: If you can avoid defining default operations, do
@@ -644,7 +647,7 @@ auto partially_ordered_value(meta::type_declaration& t) -> void;
 //
 auto cpp1_rule_of_zero(meta::type_declaration& t) -> void;
 
-#line 903 "reflect.h2"
+#line 906 "reflect.h2"
 //-----------------------------------------------------------------------
 //
 //     "By definition, a `struct` is a `class` in which members
@@ -672,7 +675,7 @@ auto cpp1_rule_of_zero(meta::type_declaration& t) -> void;
 //
 auto cpp2_struct(meta::type_declaration& t) -> void;
 
-#line 946 "reflect.h2"
+#line 949 "reflect.h2"
 //-----------------------------------------------------------------------
 //
 //     "C enumerations constitute a curiously half-baked concept. ...
@@ -702,7 +705,7 @@ auto basic_enum(
     cpp2::impl::in<bool> bitwise
     ) -> void;
 
-#line 1153 "reflect.h2"
+#line 1156 "reflect.h2"
 //-----------------------------------------------------------------------
 //
 //    "An enum[...] is a totally ordered value type that stores a
@@ -714,7 +717,7 @@ auto basic_enum(
 //
 auto cpp2_enum(meta::type_declaration& t) -> void;
 
-#line 1179 "reflect.h2"
+#line 1182 "reflect.h2"
 //-----------------------------------------------------------------------
 //
 //     "flag_enum expresses an enumeration that stores values
@@ -727,7 +730,7 @@ auto cpp2_enum(meta::type_declaration& t) -> void;
 //
 auto flag_enum(meta::type_declaration& t) -> void;
 
-#line 1211 "reflect.h2"
+#line 1214 "reflect.h2"
 //-----------------------------------------------------------------------
 //
 //     "As with void*, programmers should know that unions [...] are
@@ -754,14 +757,14 @@ auto flag_enum(meta::type_declaration& t) -> void;
 
 auto cpp2_union(meta::type_declaration& t) -> void;
 
-#line 1364 "reflect.h2"
+#line 1367 "reflect.h2"
 //-----------------------------------------------------------------------
 //
 //  print - output a pretty-printed visualization of t
 //
 auto print(cpp2::impl::in<meta::type_declaration> t) -> void;
 
-#line 1373 "reflect.h2"
+#line 1376 "reflect.h2"
 //-----------------------------------------------------------------------
 //
 //  regex - creates regular expressions from members
@@ -778,7 +781,7 @@ auto print(cpp2::impl::in<meta::type_declaration> t) -> void;
 //
 auto regex_gen(meta::type_declaration& t) -> void;
 
-#line 1449 "reflect.h2"
+#line 1452 "reflect.h2"
 //-----------------------------------------------------------------------
 //
 //  apply_metafunctions
@@ -789,7 +792,7 @@ auto regex_gen(meta::type_declaration& t) -> void;
     auto const& error
     ) -> bool;
 
-#line 1559 "reflect.h2"
+#line 1562 "reflect.h2"
 }
 
 }
@@ -811,9 +814,9 @@ namespace meta {
         stable_vector<token>* generated_tokens_
     )
         : errors{ errors_ }
-        , errors_original_size{ cpp2::unsafe_narrow<int>(std::ssize(*cpp2::impl::assert_not_null(errors))) }
+        , errors_original_size{ cpp2::unsafe_narrow<int>(std::ssize(*errors)) }
         , generated_tokens{ generated_tokens_ }
-        , parser{ *cpp2::impl::assert_not_null(errors) }
+        , parser{ *errors }
 #line 52 "reflect.h2"
     {
 
@@ -833,8 +836,8 @@ namespace meta {
 #line 69 "reflect.h2"
     [[nodiscard]] auto compiler_services::get_argument(cpp2::impl::in<int> index) & -> std::string{
         metafunctions_used = true;
-        if (([_0 = 0, _1 = index, _2 = CPP2_UFCS(ssize)(metafunction_args)]{ return cpp2::impl::cmp_less_eq(_0,_1) && cpp2::impl::cmp_less(_1,_2); }())) {
-            return CPP2_ASSERT_IN_BOUNDS(metafunction_args, index); 
+        if (([_0 = 0, _1 = index, _2 = CPP2_UFCS(ssize)(metafunction_args)]{ return _0<=_1 && _1<_2; }())) {
+            return metafunction_args[index]; 
         }
         return ""; 
     }
@@ -863,7 +866,7 @@ namespace meta {
         auto lines {&CPP2_UFCS(back)(generated_lines)}; 
 
         auto add_line {[&, _1 = lines](cpp2::impl::in<std::string_view> s) mutable -> void{
-            static_cast<void>(CPP2_UFCS(emplace_back)((*cpp2::impl::assert_not_null(_1)), s, source_line::category::cpp2));
+            static_cast<void>(CPP2_UFCS(emplace_back)((*_1), s, source_line::category::cpp2));
         }}; 
 {
 auto newline_pos{CPP2_UFCS(find)(source, '\n')};
@@ -872,10 +875,10 @@ auto newline_pos{CPP2_UFCS(find)(source, '\n')};
         //
 
 #line 102 "reflect.h2"
-        if ( cpp2::impl::cmp_greater(CPP2_UFCS(ssize)(source),1) 
-            && newline_pos != source.npos) 
+        if ( CPP2_UFCS(ssize)(source)>1 
+            && newline_pos!=source.npos) 
         {
-            while( newline_pos != std::string_view::npos ) 
+            while( newline_pos!=std::string_view::npos ) 
             {
                 add_line(CPP2_UFCS(substr)(source, 0, newline_pos));
                 CPP2_UFCS(remove_prefix)(source, newline_pos + 1);
@@ -892,17 +895,17 @@ auto newline_pos{CPP2_UFCS(find)(source, '\n')};
         //  Now lex this source fragment to generate
         //  a single grammar_map entry, whose .second
         //  is the vector of tokens
-        static_cast<void>(CPP2_UFCS(emplace_back)(generated_lexers, *cpp2::impl::assert_not_null(errors)));
+        static_cast<void>(CPP2_UFCS(emplace_back)(generated_lexers, *errors));
         auto tokens {&CPP2_UFCS(back)(generated_lexers)}; 
-        CPP2_UFCS(lex)((*cpp2::impl::assert_not_null(tokens)), *cpp2::impl::assert_not_null(cpp2::move(lines)), true);
+        CPP2_UFCS(lex)((*tokens), *cpp2::move(lines), true);
 
-        if (cpp2::cpp2_default.is_active() && !(std::ssize(CPP2_UFCS(get_map)((*cpp2::impl::assert_not_null(tokens)))) == 1) ) { cpp2::cpp2_default.report_violation(""); }
+        if (cpp2::cpp2_default.is_active() && !(std::ssize(CPP2_UFCS(get_map)((*tokens)))==1) ) { cpp2::cpp2_default.report_violation(""); }
 
         //  Now parse this single declaration from
         //  the lexed tokens
         ret.construct(CPP2_UFCS(parse_one_declaration)(parser, 
-                (*cpp2::impl::assert_not_null(CPP2_UFCS(begin)(CPP2_UFCS(get_map)(*cpp2::impl::assert_not_null(cpp2::move(tokens)))))).second, 
-                *cpp2::impl::assert_not_null(generated_tokens)
+                (*CPP2_UFCS(begin)(CPP2_UFCS(get_map)(*cpp2::move(tokens)))).second, 
+                *generated_tokens
               ));
         if (!(ret.value())) {
             error(("parse failed - the source string is not a valid statement:\n" + cpp2::to_string(cpp2::move(original_source))));
@@ -935,7 +938,7 @@ auto newline_pos{CPP2_UFCS(find)(source, '\n')};
         if (!(CPP2_UFCS(empty)(metafunction_name))) {
             message = { "while applying @" + cpp2::to_string(metafunction_name) + " - " + cpp2::to_string(message) };
         }
-        static_cast<void>(CPP2_UFCS(emplace_back)((*cpp2::impl::assert_not_null(errors)), position(), cpp2::move(message)));
+        static_cast<void>(CPP2_UFCS(emplace_back)((*errors), position(), cpp2::move(message)));
     }
 
 #line 169 "reflect.h2"
@@ -973,10 +976,10 @@ compiler_services::compiler_services(compiler_services const& that)
     }
 
 #line 241 "reflect.h2"
-    [[nodiscard]] auto declaration_base::position() const -> source_position { return CPP2_UFCS(position)((*cpp2::impl::assert_not_null(n)));  }
+    [[nodiscard]] auto declaration_base::position() const -> source_position { return CPP2_UFCS(position)((*n));  }
 
 #line 243 "reflect.h2"
-    [[nodiscard]] auto declaration_base::print() const& -> std::string { return CPP2_UFCS(pretty_print_visualize)((*cpp2::impl::assert_not_null(n)), 0);  }
+    [[nodiscard]] auto declaration_base::print() const& -> std::string { return CPP2_UFCS(pretty_print_visualize)((*n), 0);  }
 
     declaration_base::~declaration_base() noexcept{}
 declaration_base::declaration_base(declaration_base const& that)
@@ -996,68 +999,68 @@ declaration_base::declaration_base(declaration_base const& that)
     }
 
 #line 263 "reflect.h2"
-    [[nodiscard]] auto declaration::is_public() const& -> bool { return CPP2_UFCS(is_public)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::is_public() const& -> bool { return CPP2_UFCS(is_public)((*n)); }
 #line 264 "reflect.h2"
-    [[nodiscard]] auto declaration::is_protected() const& -> bool { return CPP2_UFCS(is_protected)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::is_protected() const& -> bool { return CPP2_UFCS(is_protected)((*n)); }
 #line 265 "reflect.h2"
-    [[nodiscard]] auto declaration::is_private() const& -> bool { return CPP2_UFCS(is_private)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::is_private() const& -> bool { return CPP2_UFCS(is_private)((*n)); }
 #line 266 "reflect.h2"
-    [[nodiscard]] auto declaration::is_default_access() const& -> bool { return CPP2_UFCS(is_default_access)((*cpp2::impl::assert_not_null(n)));  }
+    [[nodiscard]] auto declaration::is_default_access() const& -> bool { return CPP2_UFCS(is_default_access)((*n));  }
 
 #line 268 "reflect.h2"
-    auto declaration::default_to_public() & -> void { static_cast<void>(CPP2_UFCS(make_public)((*cpp2::impl::assert_not_null(n)))); }
+    auto declaration::default_to_public() & -> void { static_cast<void>(CPP2_UFCS(make_public)((*n))); }
 #line 269 "reflect.h2"
-    auto declaration::default_to_protected() & -> void { static_cast<void>(CPP2_UFCS(make_protected)((*cpp2::impl::assert_not_null(n))));  }
+    auto declaration::default_to_protected() & -> void { static_cast<void>(CPP2_UFCS(make_protected)((*n)));  }
 #line 270 "reflect.h2"
-    auto declaration::default_to_private() & -> void { static_cast<void>(CPP2_UFCS(make_private)((*cpp2::impl::assert_not_null(n)))); }
+    auto declaration::default_to_private() & -> void { static_cast<void>(CPP2_UFCS(make_private)((*n))); }
 
 #line 272 "reflect.h2"
-    [[nodiscard]] auto declaration::make_public() & -> bool { return CPP2_UFCS(make_public)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::make_public() & -> bool { return CPP2_UFCS(make_public)((*n)); }
 #line 273 "reflect.h2"
-    [[nodiscard]] auto declaration::make_protected() & -> bool { return CPP2_UFCS(make_protected)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::make_protected() & -> bool { return CPP2_UFCS(make_protected)((*n)); }
 #line 274 "reflect.h2"
-    [[nodiscard]] auto declaration::make_private() & -> bool { return CPP2_UFCS(make_private)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::make_private() & -> bool { return CPP2_UFCS(make_private)((*n)); }
 
 #line 276 "reflect.h2"
-    [[nodiscard]] auto declaration::has_name() const& -> bool { return CPP2_UFCS(has_name)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::has_name() const& -> bool { return CPP2_UFCS(has_name)((*n)); }
 #line 277 "reflect.h2"
-    [[nodiscard]] auto declaration::has_name(cpp2::impl::in<std::string_view> s) const& -> bool { return CPP2_UFCS(has_name)((*cpp2::impl::assert_not_null(n)), s); }
+    [[nodiscard]] auto declaration::has_name(cpp2::impl::in<std::string_view> s) const& -> bool { return CPP2_UFCS(has_name)((*n), s); }
 
 #line 279 "reflect.h2"
     [[nodiscard]] auto declaration::name() const& -> std::string_view{
-        if (has_name()) {return CPP2_UFCS(as_string_view)((*cpp2::impl::assert_not_null(CPP2_UFCS(name)(*cpp2::impl::assert_not_null(n))))); }
+        if (has_name()) {return CPP2_UFCS(as_string_view)((*CPP2_UFCS(name)(*n))); }
         else          { return ""; }
     }
 
 #line 284 "reflect.h2"
-    [[nodiscard]] auto declaration::has_initializer() const& -> bool { return CPP2_UFCS(has_initializer)((*cpp2::impl::assert_not_null(n)));  }
+    [[nodiscard]] auto declaration::has_initializer() const& -> bool { return CPP2_UFCS(has_initializer)((*n));  }
 
 #line 286 "reflect.h2"
-    [[nodiscard]] auto declaration::is_global() const& -> bool { return CPP2_UFCS(is_global)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::is_global() const& -> bool { return CPP2_UFCS(is_global)((*n)); }
 #line 287 "reflect.h2"
-    [[nodiscard]] auto declaration::is_function() const& -> bool { return CPP2_UFCS(is_function)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::is_function() const& -> bool { return CPP2_UFCS(is_function)((*n)); }
 #line 288 "reflect.h2"
-    [[nodiscard]] auto declaration::is_object() const& -> bool { return CPP2_UFCS(is_object)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::is_object() const& -> bool { return CPP2_UFCS(is_object)((*n)); }
 #line 289 "reflect.h2"
-    [[nodiscard]] auto declaration::is_base_object() const& -> bool { return CPP2_UFCS(is_base_object)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::is_base_object() const& -> bool { return CPP2_UFCS(is_base_object)((*n)); }
 #line 290 "reflect.h2"
-    [[nodiscard]] auto declaration::is_member_object() const& -> bool { return CPP2_UFCS(is_member_object)((*cpp2::impl::assert_not_null(n)));  }
+    [[nodiscard]] auto declaration::is_member_object() const& -> bool { return CPP2_UFCS(is_member_object)((*n));  }
 #line 291 "reflect.h2"
-    [[nodiscard]] auto declaration::is_type() const& -> bool { return CPP2_UFCS(is_type)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::is_type() const& -> bool { return CPP2_UFCS(is_type)((*n)); }
 #line 292 "reflect.h2"
-    [[nodiscard]] auto declaration::is_namespace() const& -> bool { return CPP2_UFCS(is_namespace)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::is_namespace() const& -> bool { return CPP2_UFCS(is_namespace)((*n)); }
 #line 293 "reflect.h2"
-    [[nodiscard]] auto declaration::is_alias() const& -> bool { return CPP2_UFCS(is_alias)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::is_alias() const& -> bool { return CPP2_UFCS(is_alias)((*n)); }
 
 #line 295 "reflect.h2"
-    [[nodiscard]] auto declaration::is_type_alias() const& -> bool { return CPP2_UFCS(is_type_alias)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::is_type_alias() const& -> bool { return CPP2_UFCS(is_type_alias)((*n)); }
 #line 296 "reflect.h2"
-    [[nodiscard]] auto declaration::is_namespace_alias() const& -> bool { return CPP2_UFCS(is_namespace_alias)((*cpp2::impl::assert_not_null(n)));  }
+    [[nodiscard]] auto declaration::is_namespace_alias() const& -> bool { return CPP2_UFCS(is_namespace_alias)((*n));  }
 #line 297 "reflect.h2"
-    [[nodiscard]] auto declaration::is_object_alias() const& -> bool { return CPP2_UFCS(is_object_alias)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::is_object_alias() const& -> bool { return CPP2_UFCS(is_object_alias)((*n)); }
 
 #line 299 "reflect.h2"
-    [[nodiscard]] auto declaration::is_function_expression() const& -> bool { return CPP2_UFCS(is_function_expression)((*cpp2::impl::assert_not_null(n)));  }
+    [[nodiscard]] auto declaration::is_function_expression() const& -> bool { return CPP2_UFCS(is_function_expression)((*n));  }
 
 #line 301 "reflect.h2"
     [[nodiscard]] auto declaration::as_function() const& -> function_declaration { return function_declaration(n, (*this));  }
@@ -1069,28 +1072,28 @@ declaration_base::declaration_base(declaration_base const& that)
     [[nodiscard]] auto declaration::as_alias() const& -> alias_declaration { return alias_declaration(n, (*this)); }
 
 #line 306 "reflect.h2"
-    [[nodiscard]] auto declaration::get_parent() const& -> declaration { return declaration((*cpp2::impl::assert_not_null(n)).parent_declaration, (*this)); }
+    [[nodiscard]] auto declaration::get_parent() const& -> declaration { return declaration((*n).parent_declaration, (*this)); }
 
 #line 308 "reflect.h2"
-    [[nodiscard]] auto declaration::parent_is_function() const& -> bool { return CPP2_UFCS(parent_is_function)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::parent_is_function() const& -> bool { return CPP2_UFCS(parent_is_function)((*n)); }
 #line 309 "reflect.h2"
-    [[nodiscard]] auto declaration::parent_is_object() const& -> bool { return CPP2_UFCS(parent_is_object)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::parent_is_object() const& -> bool { return CPP2_UFCS(parent_is_object)((*n)); }
 #line 310 "reflect.h2"
-    [[nodiscard]] auto declaration::parent_is_type() const& -> bool { return CPP2_UFCS(parent_is_type)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::parent_is_type() const& -> bool { return CPP2_UFCS(parent_is_type)((*n)); }
 #line 311 "reflect.h2"
-    [[nodiscard]] auto declaration::parent_is_namespace() const& -> bool { return CPP2_UFCS(parent_is_namespace)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::parent_is_namespace() const& -> bool { return CPP2_UFCS(parent_is_namespace)((*n)); }
 #line 312 "reflect.h2"
-    [[nodiscard]] auto declaration::parent_is_alias() const& -> bool { return CPP2_UFCS(parent_is_alias)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::parent_is_alias() const& -> bool { return CPP2_UFCS(parent_is_alias)((*n)); }
 
 #line 314 "reflect.h2"
-    [[nodiscard]] auto declaration::parent_is_type_alias() const& -> bool { return CPP2_UFCS(parent_is_type_alias)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::parent_is_type_alias() const& -> bool { return CPP2_UFCS(parent_is_type_alias)((*n)); }
 #line 315 "reflect.h2"
-    [[nodiscard]] auto declaration::parent_is_namespace_alias() const& -> bool { return CPP2_UFCS(parent_is_namespace_alias)((*cpp2::impl::assert_not_null(n)));  }
+    [[nodiscard]] auto declaration::parent_is_namespace_alias() const& -> bool { return CPP2_UFCS(parent_is_namespace_alias)((*n));  }
 #line 316 "reflect.h2"
-    [[nodiscard]] auto declaration::parent_is_object_alias() const& -> bool { return CPP2_UFCS(parent_is_object_alias)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto declaration::parent_is_object_alias() const& -> bool { return CPP2_UFCS(parent_is_object_alias)((*n)); }
 
 #line 318 "reflect.h2"
-    [[nodiscard]] auto declaration::parent_is_polymorphic() const& -> bool { return CPP2_UFCS(parent_is_polymorphic)((*cpp2::impl::assert_not_null(n)));  }
+    [[nodiscard]] auto declaration::parent_is_polymorphic() const& -> bool { return CPP2_UFCS(parent_is_polymorphic)((*n));  }
 
 #line 320 "reflect.h2"
     auto declaration::mark_for_removal_from_enclosing_type() & -> void
@@ -1098,7 +1101,7 @@ declaration_base::declaration_base(declaration_base const& that)
     {
         if (cpp2::type_safety.is_active() && !(parent_is_type()) ) { cpp2::type_safety.report_violation(""); }
 #line 323 "reflect.h2"
-        auto test {CPP2_UFCS(type_member_mark_for_removal)((*cpp2::impl::assert_not_null(n)))}; 
+        auto test {CPP2_UFCS(type_member_mark_for_removal)((*n))}; 
         if (cpp2::cpp2_default.is_active() && !(cpp2::move(test)) ) { cpp2::cpp2_default.report_violation(""); }// ... to ensure this assert is true
     }
 
@@ -1116,95 +1119,101 @@ declaration::declaration(declaration const& that)
 #line 341 "reflect.h2"
     {
 
-        if (cpp2::cpp2_default.is_active() && !(CPP2_UFCS(is_function)((*cpp2::impl::assert_not_null(n)))) ) { cpp2::cpp2_default.report_violation(""); }
+        if (cpp2::cpp2_default.is_active() && !(CPP2_UFCS(is_function)((*n))) ) { cpp2::cpp2_default.report_violation(""); }
     }
 
 #line 346 "reflect.h2"
-    [[nodiscard]] auto function_declaration::index_of_parameter_named(cpp2::impl::in<std::string_view> s) const& -> int { return CPP2_UFCS(index_of_parameter_named)((*cpp2::impl::assert_not_null(n)), s); }
+    [[nodiscard]] auto function_declaration::index_of_parameter_named(cpp2::impl::in<std::string_view> s) const& -> int { return CPP2_UFCS(index_of_parameter_named)((*n), s); }
 #line 347 "reflect.h2"
-    [[nodiscard]] auto function_declaration::has_parameter_named(cpp2::impl::in<std::string_view> s) const& -> bool { return CPP2_UFCS(has_parameter_named)((*cpp2::impl::assert_not_null(n)), s); }
+    [[nodiscard]] auto function_declaration::has_parameter_named(cpp2::impl::in<std::string_view> s) const& -> bool { return CPP2_UFCS(has_parameter_named)((*n), s); }
 #line 348 "reflect.h2"
-    [[nodiscard]] auto function_declaration::has_in_parameter_named(cpp2::impl::in<std::string_view> s) const& -> bool { return CPP2_UFCS(has_in_parameter_named)((*cpp2::impl::assert_not_null(n)), s); }
+    [[nodiscard]] auto function_declaration::has_in_parameter_named(cpp2::impl::in<std::string_view> s) const& -> bool { return CPP2_UFCS(has_in_parameter_named)((*n), s); }
 #line 349 "reflect.h2"
-    [[nodiscard]] auto function_declaration::has_out_parameter_named(cpp2::impl::in<std::string_view> s) const& -> bool { return CPP2_UFCS(has_out_parameter_named)((*cpp2::impl::assert_not_null(n)), s); }
+    [[nodiscard]] auto function_declaration::has_copy_parameter_named(cpp2::impl::in<std::string_view> s) const& -> bool { return CPP2_UFCS(has_copy_parameter_named)((*n), s); }
 #line 350 "reflect.h2"
-    [[nodiscard]] auto function_declaration::has_move_parameter_named(cpp2::impl::in<std::string_view> s) const& -> bool { return CPP2_UFCS(has_move_parameter_named)((*cpp2::impl::assert_not_null(n)), s); }
+    [[nodiscard]] auto function_declaration::has_inout_parameter_named(cpp2::impl::in<std::string_view> s) const& -> bool { return CPP2_UFCS(has_inout_parameter_named)((*n), s); }
 #line 351 "reflect.h2"
-    [[nodiscard]] auto function_declaration::first_parameter_name() const& -> std::string { return CPP2_UFCS(first_parameter_name)((*cpp2::impl::assert_not_null(n))); }
-
+    [[nodiscard]] auto function_declaration::has_out_parameter_named(cpp2::impl::in<std::string_view> s) const& -> bool { return CPP2_UFCS(has_out_parameter_named)((*n), s); }
+#line 352 "reflect.h2"
+    [[nodiscard]] auto function_declaration::has_move_parameter_named(cpp2::impl::in<std::string_view> s) const& -> bool { return CPP2_UFCS(has_move_parameter_named)((*n), s); }
 #line 353 "reflect.h2"
-    [[nodiscard]] auto function_declaration::has_parameter_with_name_and_pass(cpp2::impl::in<std::string_view> s, cpp2::impl::in<passing_style> pass) const& -> bool { 
-                                                  return CPP2_UFCS(has_parameter_with_name_and_pass)((*cpp2::impl::assert_not_null(n)), s, pass);  }
-#line 355 "reflect.h2"
-    [[nodiscard]] auto function_declaration::is_function_with_this() const& -> bool { return CPP2_UFCS(is_function_with_this)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto function_declaration::has_forward_parameter_named(cpp2::impl::in<std::string_view> s) const& -> bool { return CPP2_UFCS(has_forward_parameter_named)((*n), s); }
+#line 354 "reflect.h2"
+    [[nodiscard]] auto function_declaration::first_parameter_name() const& -> std::string { return CPP2_UFCS(first_parameter_name)((*n)); }
+
 #line 356 "reflect.h2"
-    [[nodiscard]] auto function_declaration::is_virtual() const& -> bool { return CPP2_UFCS(is_virtual_function)((*cpp2::impl::assert_not_null(n))); }
-#line 357 "reflect.h2"
-    [[nodiscard]] auto function_declaration::is_defaultable() const& -> bool { return CPP2_UFCS(is_defaultable_function)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto function_declaration::has_parameter_with_name_and_pass(cpp2::impl::in<std::string_view> s, cpp2::impl::in<passing_style> pass) const& -> bool { 
+                                                  return CPP2_UFCS(has_parameter_with_name_and_pass)((*n), s, pass);  }
 #line 358 "reflect.h2"
-    [[nodiscard]] auto function_declaration::is_constructor() const& -> bool { return CPP2_UFCS(is_constructor)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto function_declaration::is_function_with_this() const& -> bool { return CPP2_UFCS(is_function_with_this)((*n)); }
 #line 359 "reflect.h2"
-    [[nodiscard]] auto function_declaration::is_default_constructor() const& -> bool { return CPP2_UFCS(is_default_constructor)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto function_declaration::is_virtual() const& -> bool { return CPP2_UFCS(is_virtual_function)((*n)); }
 #line 360 "reflect.h2"
-    [[nodiscard]] auto function_declaration::is_move() const& -> bool { return CPP2_UFCS(is_move)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto function_declaration::is_defaultable() const& -> bool { return CPP2_UFCS(is_defaultable_function)((*n)); }
 #line 361 "reflect.h2"
-    [[nodiscard]] auto function_declaration::is_swap() const& -> bool { return CPP2_UFCS(is_swap)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto function_declaration::is_constructor() const& -> bool { return CPP2_UFCS(is_constructor)((*n)); }
 #line 362 "reflect.h2"
-    [[nodiscard]] auto function_declaration::is_constructor_with_that() const& -> bool { return CPP2_UFCS(is_constructor_with_that)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto function_declaration::is_default_constructor() const& -> bool { return CPP2_UFCS(is_default_constructor)((*n)); }
 #line 363 "reflect.h2"
-    [[nodiscard]] auto function_declaration::is_constructor_with_in_that() const& -> bool { return CPP2_UFCS(is_constructor_with_in_that)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto function_declaration::is_move() const& -> bool { return CPP2_UFCS(is_move)((*n)); }
 #line 364 "reflect.h2"
-    [[nodiscard]] auto function_declaration::is_constructor_with_move_that() const& -> bool { return CPP2_UFCS(is_constructor_with_move_that)((*cpp2::impl::assert_not_null(n)));  }
+    [[nodiscard]] auto function_declaration::is_swap() const& -> bool { return CPP2_UFCS(is_swap)((*n)); }
 #line 365 "reflect.h2"
-    [[nodiscard]] auto function_declaration::is_assignment() const& -> bool { return CPP2_UFCS(is_assignment)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto function_declaration::is_constructor_with_that() const& -> bool { return CPP2_UFCS(is_constructor_with_that)((*n)); }
 #line 366 "reflect.h2"
-    [[nodiscard]] auto function_declaration::is_assignment_with_that() const& -> bool { return CPP2_UFCS(is_assignment_with_that)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto function_declaration::is_constructor_with_in_that() const& -> bool { return CPP2_UFCS(is_constructor_with_in_that)((*n)); }
 #line 367 "reflect.h2"
-    [[nodiscard]] auto function_declaration::is_assignment_with_in_that() const& -> bool { return CPP2_UFCS(is_assignment_with_in_that)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto function_declaration::is_constructor_with_move_that() const& -> bool { return CPP2_UFCS(is_constructor_with_move_that)((*n));  }
 #line 368 "reflect.h2"
-    [[nodiscard]] auto function_declaration::is_assignment_with_move_that() const& -> bool { return CPP2_UFCS(is_assignment_with_move_that)((*cpp2::impl::assert_not_null(n)));  }
+    [[nodiscard]] auto function_declaration::is_assignment() const& -> bool { return CPP2_UFCS(is_assignment)((*n)); }
 #line 369 "reflect.h2"
-    [[nodiscard]] auto function_declaration::is_destructor() const& -> bool { return CPP2_UFCS(is_destructor)((*cpp2::impl::assert_not_null(n))); }
-
+    [[nodiscard]] auto function_declaration::is_assignment_with_that() const& -> bool { return CPP2_UFCS(is_assignment_with_that)((*n)); }
+#line 370 "reflect.h2"
+    [[nodiscard]] auto function_declaration::is_assignment_with_in_that() const& -> bool { return CPP2_UFCS(is_assignment_with_in_that)((*n)); }
 #line 371 "reflect.h2"
-    [[nodiscard]] auto function_declaration::is_copy_or_move() const& -> bool { return is_constructor_with_that() || is_assignment_with_that(); }
+    [[nodiscard]] auto function_declaration::is_assignment_with_move_that() const& -> bool { return CPP2_UFCS(is_assignment_with_move_that)((*n));  }
+#line 372 "reflect.h2"
+    [[nodiscard]] auto function_declaration::is_destructor() const& -> bool { return CPP2_UFCS(is_destructor)((*n)); }
 
-#line 373 "reflect.h2"
-    [[nodiscard]] auto function_declaration::has_declared_return_type() const& -> bool { return CPP2_UFCS(has_declared_return_type)((*cpp2::impl::assert_not_null(n))); }
 #line 374 "reflect.h2"
-    [[nodiscard]] auto function_declaration::has_deduced_return_type() const& -> bool { return CPP2_UFCS(has_deduced_return_type)((*cpp2::impl::assert_not_null(n))); }
-#line 375 "reflect.h2"
-    [[nodiscard]] auto function_declaration::has_bool_return_type() const& -> bool { return CPP2_UFCS(has_bool_return_type)((*cpp2::impl::assert_not_null(n))); }
-#line 376 "reflect.h2"
-    [[nodiscard]] auto function_declaration::has_non_void_return_type() const& -> bool { return CPP2_UFCS(has_non_void_return_type)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto function_declaration::is_copy_or_move() const& -> bool { return is_constructor_with_that() || is_assignment_with_that(); }
 
+#line 376 "reflect.h2"
+    [[nodiscard]] auto function_declaration::has_declared_return_type() const& -> bool { return CPP2_UFCS(has_declared_return_type)((*n)); }
+#line 377 "reflect.h2"
+    [[nodiscard]] auto function_declaration::has_deduced_return_type() const& -> bool { return CPP2_UFCS(has_deduced_return_type)((*n)); }
 #line 378 "reflect.h2"
-    [[nodiscard]] auto function_declaration::unnamed_return_type() const& -> std::string { return CPP2_UFCS(unnamed_return_type_to_string)((*cpp2::impl::assert_not_null(n))); }
+    [[nodiscard]] auto function_declaration::has_bool_return_type() const& -> bool { return CPP2_UFCS(has_bool_return_type)((*n)); }
+#line 379 "reflect.h2"
+    [[nodiscard]] auto function_declaration::has_non_void_return_type() const& -> bool { return CPP2_UFCS(has_non_void_return_type)((*n)); }
+
+#line 381 "reflect.h2"
+    [[nodiscard]] auto function_declaration::unnamed_return_type() const& -> std::string { return CPP2_UFCS(unnamed_return_type_to_string)((*n)); }
 
-#line 380 "reflect.h2"
+#line 383 "reflect.h2"
     [[nodiscard]] auto function_declaration::get_parameters() const& -> std::vector<object_declaration>
 
     {
         std::vector<object_declaration> ret {}; 
-        for ( auto const& param : CPP2_UFCS(get_function_parameters)((*cpp2::impl::assert_not_null(n))) ) {
-            static_cast<void>(CPP2_UFCS(emplace_back)(ret, &*cpp2::impl::assert_not_null((*cpp2::impl::assert_not_null(param)).declaration), (*this)));
+        for ( auto const& param : CPP2_UFCS(get_function_parameters)((*n)) ) {
+            static_cast<void>(CPP2_UFCS(emplace_back)(ret, &*(*param).declaration, (*this)));
         }
         return ret; 
     }
 
-#line 390 "reflect.h2"
-    [[nodiscard]] auto function_declaration::is_binary_comparison_function() const& -> bool { return CPP2_UFCS(is_binary_comparison_function)((*cpp2::impl::assert_not_null(n)));  }
+#line 393 "reflect.h2"
+    [[nodiscard]] auto function_declaration::is_binary_comparison_function() const& -> bool { return CPP2_UFCS(is_binary_comparison_function)((*n));  }
 
-#line 392 "reflect.h2"
-    auto function_declaration::default_to_virtual() & -> void { static_cast<void>(CPP2_UFCS(make_function_virtual)((*cpp2::impl::assert_not_null(n)))); }
+#line 395 "reflect.h2"
+    auto function_declaration::default_to_virtual() & -> void { static_cast<void>(CPP2_UFCS(make_function_virtual)((*n))); }
 
-#line 394 "reflect.h2"
-    [[nodiscard]] auto function_declaration::make_virtual() & -> bool { return CPP2_UFCS(make_function_virtual)((*cpp2::impl::assert_not_null(n))); }
+#line 397 "reflect.h2"
+    [[nodiscard]] auto function_declaration::make_virtual() & -> bool { return CPP2_UFCS(make_function_virtual)((*n)); }
 
-#line 396 "reflect.h2"
+#line 399 "reflect.h2"
     auto function_declaration::add_initializer(cpp2::impl::in<std::string_view> source) & -> void
 
-#line 399 "reflect.h2"
+#line 402 "reflect.h2"
     {
         if ((*this).is_active() && !(!(has_initializer())) ) { (*this).report_violation(CPP2_CONTRACT_MSG("cannot add an initializer to a function that already has one")); }
         if ((*this).is_active() && !(parent_is_type()) ) { (*this).report_violation(CPP2_CONTRACT_MSG("cannot add an initializer to a function that isn't in a type scope")); }
@@ -1213,48 +1222,48 @@ declaration::declaration(declaration const& that)
         //require( parent_is_type(),
         //         "cannot add an initializer to a function that isn't in a type scope");
 
-#line 405 "reflect.h2"
+#line 408 "reflect.h2"
         auto stmt {parse_statement(source)}; 
         if (!((cpp2::impl::as_<bool>(stmt)))) {
             error("cannot add an initializer that is not a valid statement");
             return ; 
         }
-        require(CPP2_UFCS(add_function_initializer)((*cpp2::impl::assert_not_null(n)), std::move(cpp2::move(stmt))), 
+        require(CPP2_UFCS(add_function_initializer)((*n), std::move(cpp2::move(stmt))), 
                  std::string("unexpected error while attempting to add initializer"));
     }
 
     function_declaration::function_declaration(function_declaration const& that)
                                 : declaration{ static_cast<declaration const&>(that) }{}
 
-#line 423 "reflect.h2"
+#line 426 "reflect.h2"
     object_declaration::object_declaration(
 
         declaration_node* n_, 
         cpp2::impl::in<compiler_services> s
     )
         : declaration{ n_, s }
-#line 428 "reflect.h2"
+#line 431 "reflect.h2"
     {
 
-        if (cpp2::cpp2_default.is_active() && !(CPP2_UFCS(is_object)((*cpp2::impl::assert_not_null(n)))) ) { cpp2::cpp2_default.report_violation(""); }
+        if (cpp2::cpp2_default.is_active() && !(CPP2_UFCS(is_object)((*n))) ) { cpp2::cpp2_default.report_violation(""); }
     }
 
-#line 433 "reflect.h2"
-    [[nodiscard]] auto object_declaration::is_const() const& -> bool { return CPP2_UFCS(is_const)((*cpp2::impl::assert_not_null(n))); }
-#line 434 "reflect.h2"
-    [[nodiscard]] auto object_declaration::has_wildcard_type() const& -> bool { return CPP2_UFCS(has_wildcard_type)((*cpp2::impl::assert_not_null(n)));  }
-
 #line 436 "reflect.h2"
+    [[nodiscard]] auto object_declaration::is_const() const& -> bool { return CPP2_UFCS(is_const)((*n)); }
+#line 437 "reflect.h2"
+    [[nodiscard]] auto object_declaration::has_wildcard_type() const& -> bool { return CPP2_UFCS(has_wildcard_type)((*n));  }
+
+#line 439 "reflect.h2"
     [[nodiscard]] auto object_declaration::type() const& -> std::string{
-        auto ret {CPP2_UFCS(object_type)((*cpp2::impl::assert_not_null(n)))}; 
+        auto ret {CPP2_UFCS(object_type)((*n))}; 
         require(!(contains(ret, "(*ERROR*)")), 
                  "cannot to_string this type: " + ret);
         return ret; 
     }
 
-#line 443 "reflect.h2"
+#line 446 "reflect.h2"
     [[nodiscard]] auto object_declaration::initializer() const& -> std::string{
-        auto ret {CPP2_UFCS(object_initializer)((*cpp2::impl::assert_not_null(n)))}; 
+        auto ret {CPP2_UFCS(object_initializer)((*n))}; 
         require(!(contains(ret, "(*ERROR*)")), 
                  "cannot to_string this initializer: " + ret);
         return ret; 
@@ -1263,20 +1272,20 @@ declaration::declaration(declaration const& that)
     object_declaration::object_declaration(object_declaration const& that)
                                 : declaration{ static_cast<declaration const&>(that) }{}
 
-#line 459 "reflect.h2"
+#line 462 "reflect.h2"
     type_declaration::type_declaration(
 
         declaration_node* n_, 
         cpp2::impl::in<compiler_services> s
     )
         : declaration{ n_, s }
-#line 464 "reflect.h2"
+#line 467 "reflect.h2"
     {
 
-        if (cpp2::cpp2_default.is_active() && !(CPP2_UFCS(is_type)((*cpp2::impl::assert_not_null(n)))) ) { cpp2::cpp2_default.report_violation(""); }
+        if (cpp2::cpp2_default.is_active() && !(CPP2_UFCS(is_type)((*n))) ) { cpp2::cpp2_default.report_violation(""); }
     }
 
-#line 469 "reflect.h2"
+#line 472 "reflect.h2"
     auto type_declaration::reserve_names(cpp2::impl::in<std::string_view> name, auto&& ...etc) const& -> void
     {                           // etc is not declared ':string_view' for compatibility with GCC 10.x
         for ( 
@@ -1289,103 +1298,103 @@ declaration::declaration(declaration const& that)
         }
     }
 
-#line 481 "reflect.h2"
-    [[nodiscard]] auto type_declaration::is_polymorphic() const& -> bool { return CPP2_UFCS(is_polymorphic)((*cpp2::impl::assert_not_null(n))); }
-#line 482 "reflect.h2"
-    [[nodiscard]] auto type_declaration::is_final() const& -> bool { return CPP2_UFCS(is_type_final)((*cpp2::impl::assert_not_null(n))); }
-#line 483 "reflect.h2"
-    [[nodiscard]] auto type_declaration::make_final() & -> bool { return CPP2_UFCS(make_type_final)((*cpp2::impl::assert_not_null(n))); }
-
+#line 484 "reflect.h2"
+    [[nodiscard]] auto type_declaration::is_polymorphic() const& -> bool { return CPP2_UFCS(is_polymorphic)((*n)); }
 #line 485 "reflect.h2"
+    [[nodiscard]] auto type_declaration::is_final() const& -> bool { return CPP2_UFCS(is_type_final)((*n)); }
+#line 486 "reflect.h2"
+    [[nodiscard]] auto type_declaration::make_final() & -> bool { return CPP2_UFCS(make_type_final)((*n)); }
+
+#line 488 "reflect.h2"
     [[nodiscard]] auto type_declaration::get_member_functions() const& -> std::vector<function_declaration>
 
     {
         std::vector<function_declaration> ret {}; 
         for ( 
-             auto const& d : CPP2_UFCS(get_type_scope_declarations)((*cpp2::impl::assert_not_null(n)), declaration_node::functions) ) {
+             auto const& d : CPP2_UFCS(get_type_scope_declarations)((*n), declaration_node::functions) ) {
             static_cast<void>(CPP2_UFCS(emplace_back)(ret, d, (*this)));
         }
         return ret; 
     }
 
-#line 496 "reflect.h2"
+#line 499 "reflect.h2"
     [[nodiscard]] auto type_declaration::get_member_functions_needing_initializer() const& -> std::vector<function_declaration>
 
     {
         std::vector<function_declaration> ret {}; 
         for ( 
-             auto const& d : CPP2_UFCS(get_type_scope_declarations)((*cpp2::impl::assert_not_null(n)), declaration_node::functions) ) 
-        if ( !(CPP2_UFCS(has_initializer)((*cpp2::impl::assert_not_null(d)))) 
-            && !(CPP2_UFCS(is_virtual_function)((*cpp2::impl::assert_not_null(d)))) 
-            && !(CPP2_UFCS(is_defaultable_function)((*cpp2::impl::assert_not_null(d))))) 
+             auto const& d : CPP2_UFCS(get_type_scope_declarations)((*n), declaration_node::functions) ) 
+        if ( !(CPP2_UFCS(has_initializer)((*d))) 
+            && !(CPP2_UFCS(is_virtual_function)((*d))) 
+            && !(CPP2_UFCS(is_defaultable_function)((*d)))) 
         {
             static_cast<void>(CPP2_UFCS(emplace_back)(ret, d, (*this)));
         }
         return ret; 
     }
 
-#line 511 "reflect.h2"
+#line 514 "reflect.h2"
     [[nodiscard]] auto type_declaration::get_member_objects() const& -> std::vector<object_declaration>
 
     {
         std::vector<object_declaration> ret {}; 
-        for ( auto const& d : CPP2_UFCS(get_type_scope_declarations)((*cpp2::impl::assert_not_null(n)), declaration_node::objects) ) {
+        for ( auto const& d : CPP2_UFCS(get_type_scope_declarations)((*n), declaration_node::objects) ) {
             static_cast<void>(CPP2_UFCS(emplace_back)(ret, d, (*this)));
         }
         return ret; 
     }
 
-#line 521 "reflect.h2"
+#line 524 "reflect.h2"
     [[nodiscard]] auto type_declaration::get_member_types() const& -> std::vector<type_declaration>
 
     {
         std::vector<type_declaration> ret {}; 
-        for ( auto const& d : CPP2_UFCS(get_type_scope_declarations)((*cpp2::impl::assert_not_null(n)), declaration_node::types) ) {
+        for ( auto const& d : CPP2_UFCS(get_type_scope_declarations)((*n), declaration_node::types) ) {
             static_cast<void>(CPP2_UFCS(emplace_back)(ret, d, (*this)));
         }
         return ret; 
     }
 
-#line 531 "reflect.h2"
+#line 534 "reflect.h2"
     [[nodiscard]] auto type_declaration::get_member_aliases() const& -> std::vector<alias_declaration>
 
     {
         std::vector<alias_declaration> ret {}; 
-        for ( auto const& d : CPP2_UFCS(get_type_scope_declarations)((*cpp2::impl::assert_not_null(n)), declaration_node::aliases) ) {
+        for ( auto const& d : CPP2_UFCS(get_type_scope_declarations)((*n), declaration_node::aliases) ) {
             static_cast<void>(CPP2_UFCS(emplace_back)(ret, d, (*this)));
         }
         return ret; 
     }
 
-#line 541 "reflect.h2"
+#line 544 "reflect.h2"
     [[nodiscard]] auto type_declaration::get_members() const& -> std::vector<declaration>
 
     {
         std::vector<declaration> ret {}; 
-        for ( auto const& d : CPP2_UFCS(get_type_scope_declarations)((*cpp2::impl::assert_not_null(n)), declaration_node::all) ) {
+        for ( auto const& d : CPP2_UFCS(get_type_scope_declarations)((*n), declaration_node::all) ) {
             static_cast<void>(CPP2_UFCS(emplace_back)(ret, d, (*this)));
         }
         return ret; 
     }
 
-#line 551 "reflect.h2"
+#line 554 "reflect.h2"
     [[nodiscard]] auto type_declaration::query_declared_value_set_functions() const& -> query_declared_value_set_functions_ret
 
-#line 558 "reflect.h2"
+#line 561 "reflect.h2"
     {
             cpp2::impl::deferred_init<bool> out_this_in_that;
             cpp2::impl::deferred_init<bool> out_this_move_that;
             cpp2::impl::deferred_init<bool> inout_this_in_that;
             cpp2::impl::deferred_init<bool> inout_this_move_that;
-#line 559 "reflect.h2"
-        auto declared {CPP2_UFCS(find_declared_value_set_functions)((*cpp2::impl::assert_not_null(n)))}; 
+#line 562 "reflect.h2"
+        auto declared {CPP2_UFCS(find_declared_value_set_functions)((*n))}; 
         out_this_in_that.construct(declared.out_this_in_that != nullptr);
-        out_this_move_that.construct(declared.out_this_move_that != nullptr);
-        inout_this_in_that.construct(declared.inout_this_in_that != nullptr);
-        inout_this_move_that.construct(cpp2::move(declared).inout_this_move_that != nullptr);
+        out_this_move_that.construct(declared.out_this_move_that!=nullptr);
+        inout_this_in_that.construct(declared.inout_this_in_that!=nullptr);
+        inout_this_move_that.construct(cpp2::move(declared).inout_this_move_that!=nullptr);
     return  { std::move(out_this_in_that.value()), std::move(out_this_move_that.value()), std::move(inout_this_in_that.value()), std::move(inout_this_move_that.value()) }; }
 
-#line 566 "reflect.h2"
+#line 569 "reflect.h2"
     auto type_declaration::add_member(cpp2::impl::in<std::string_view> source) & -> void
     {
         auto decl {parse_statement(source)}; 
@@ -1393,47 +1402,47 @@ declaration::declaration(declaration const& that)
             error("the provided source string is not a valid statement");
             return ; 
         }
-        if (!(CPP2_UFCS(is_declaration)((*cpp2::impl::assert_not_null(decl))))) {
+        if (!(CPP2_UFCS(is_declaration)((*decl)))) {
             error("cannot add a member that is not a declaration");
         }
-        require(CPP2_UFCS(add_type_member)((*cpp2::impl::assert_not_null(n)), std::move(cpp2::move(decl))), 
+        require(CPP2_UFCS(add_type_member)((*n), std::move(cpp2::move(decl))), 
                  std::string("unexpected error while attempting to add member:\n") + source);
     }
 
-#line 580 "reflect.h2"
-    auto type_declaration::remove_marked_members() & -> void { CPP2_UFCS(type_remove_marked_members)((*cpp2::impl::assert_not_null(n)));  }
-#line 581 "reflect.h2"
-    auto type_declaration::remove_all_members() & -> void { CPP2_UFCS(type_remove_all_members)((*cpp2::impl::assert_not_null(n))); }
-
 #line 583 "reflect.h2"
-    auto type_declaration::disable_member_function_generation() & -> void { CPP2_UFCS(type_disable_member_function_generation)((*cpp2::impl::assert_not_null(n)));  }
+    auto type_declaration::remove_marked_members() & -> void { CPP2_UFCS(type_remove_marked_members)((*n));  }
+#line 584 "reflect.h2"
+    auto type_declaration::remove_all_members() & -> void { CPP2_UFCS(type_remove_all_members)((*n)); }
+
+#line 586 "reflect.h2"
+    auto type_declaration::disable_member_function_generation() & -> void { CPP2_UFCS(type_disable_member_function_generation)((*n));  }
 
     type_declaration::type_declaration(type_declaration const& that)
                                 : declaration{ static_cast<declaration const&>(that) }{}
 
-#line 594 "reflect.h2"
+#line 597 "reflect.h2"
     alias_declaration::alias_declaration(
 
         declaration_node* n_, 
         cpp2::impl::in<compiler_services> s
     )
         : declaration{ n_, s }
-#line 599 "reflect.h2"
+#line 602 "reflect.h2"
     {
 
-        if (cpp2::cpp2_default.is_active() && !(CPP2_UFCS(is_alias)((*cpp2::impl::assert_not_null(n)))) ) { cpp2::cpp2_default.report_violation(""); }
+        if (cpp2::cpp2_default.is_active() && !(CPP2_UFCS(is_alias)((*n))) ) { cpp2::cpp2_default.report_violation(""); }
     }
 
     alias_declaration::alias_declaration(alias_declaration const& that)
                                 : declaration{ static_cast<declaration const&>(that) }{}
 
-#line 618 "reflect.h2"
+#line 621 "reflect.h2"
 auto add_virtual_destructor(meta::type_declaration& t) -> void
 {
     CPP2_UFCS(add_member)(t, "operator=: (virtual move this) = { }");
 }
 
-#line 636 "reflect.h2"
+#line 639 "reflect.h2"
 auto interface(meta::type_declaration& t) -> void
 {
     auto has_dtor {false}; 
@@ -1460,7 +1469,7 @@ auto interface(meta::type_declaration& t) -> void
     }
 }
 
-#line 682 "reflect.h2"
+#line 685 "reflect.h2"
 auto polymorphic_base(meta::type_declaration& t) -> void
 {
     auto has_dtor {false}; 
@@ -1485,7 +1494,7 @@ auto polymorphic_base(meta::type_declaration& t) -> void
     }
 }
 
-#line 727 "reflect.h2"
+#line 730 "reflect.h2"
 auto ordered_impl(
     meta::type_declaration& t, 
     cpp2::impl::in<std::string_view> ordering
@@ -1498,7 +1507,7 @@ auto ordered_impl(
         if (CPP2_UFCS(has_name)(mf, "operator<=>")) {
             has_spaceship = true;
             auto return_name {CPP2_UFCS(unnamed_return_type)(mf)}; 
-            if (CPP2_UFCS(find)(return_name, ordering) == return_name.npos) 
+            if (CPP2_UFCS(find)(return_name, ordering)==return_name.npos) 
             {
                 CPP2_UFCS(error)(mf, "operator<=> must return std::" + cpp2::impl::as_<std::string>(ordering));
             }
@@ -1510,25 +1519,25 @@ auto ordered_impl(
     }
 }
 
-#line 756 "reflect.h2"
+#line 759 "reflect.h2"
 auto ordered(meta::type_declaration& t) -> void
 {
     ordered_impl(t, "strong_ordering");
 }
 
-#line 764 "reflect.h2"
+#line 767 "reflect.h2"
 auto weakly_ordered(meta::type_declaration& t) -> void
 {
     ordered_impl(t, "weak_ordering");
 }
 
-#line 772 "reflect.h2"
+#line 775 "reflect.h2"
 auto partially_ordered(meta::type_declaration& t) -> void
 {
     ordered_impl(t, "partial_ordering");
 }
 
-#line 794 "reflect.h2"
+#line 797 "reflect.h2"
 auto copyable(meta::type_declaration& t) -> void
 {
     //  If the user explicitly wrote any of the copy/move functions,
@@ -1550,7 +1559,7 @@ auto copyable(meta::type_declaration& t) -> void
     }}
 }
 
-#line 822 "reflect.h2"
+#line 825 "reflect.h2"
 auto basic_value(meta::type_declaration& t) -> void
 {
     CPP2_UFCS(copyable)(t);
@@ -1569,28 +1578,28 @@ auto basic_value(meta::type_declaration& t) -> void
     }
 }
 
-#line 850 "reflect.h2"
+#line 853 "reflect.h2"
 auto value(meta::type_declaration& t) -> void
 {
     CPP2_UFCS(ordered)(t);
     CPP2_UFCS(basic_value)(t);
 }
 
-#line 856 "reflect.h2"
+#line 859 "reflect.h2"
 auto weakly_ordered_value(meta::type_declaration& t) -> void
 {
     CPP2_UFCS(weakly_ordered)(t);
     CPP2_UFCS(basic_value)(t);
 }
 
-#line 862 "reflect.h2"
+#line 865 "reflect.h2"
 auto partially_ordered_value(meta::type_declaration& t) -> void
 {
     CPP2_UFCS(partially_ordered)(t);
     CPP2_UFCS(basic_value)(t);
 }
 
-#line 891 "reflect.h2"
+#line 894 "reflect.h2"
 auto cpp1_rule_of_zero(meta::type_declaration& t) -> void
 {
     for ( auto& mf : CPP2_UFCS(get_member_functions)(t) ) 
@@ -1603,7 +1612,7 @@ auto cpp1_rule_of_zero(meta::type_declaration& t) -> void
     CPP2_UFCS(disable_member_function_generation)(t);
 }
 
-#line 928 "reflect.h2"
+#line 931 "reflect.h2"
 auto cpp2_struct(meta::type_declaration& t) -> void
 {
     for ( auto& m : CPP2_UFCS(get_members)(t) ) 
@@ -1621,7 +1630,7 @@ auto cpp2_struct(meta::type_declaration& t) -> void
     CPP2_UFCS(cpp1_rule_of_zero)(t);
 }
 
-#line 969 "reflect.h2"
+#line 972 "reflect.h2"
 auto basic_enum(
     meta::type_declaration& t, 
     auto const& nextval, 
@@ -1646,7 +1655,7 @@ auto basic_enum(
 {
 std::string value{"-1"};
 
-#line 992 "reflect.h2"
+#line 995 "reflect.h2"
     for ( 
           auto const& m : CPP2_UFCS(get_members)(t) ) 
     if (  CPP2_UFCS(is_member_object)(m)) 
@@ -1668,11 +1677,11 @@ std::string value{"-1"};
 
         nextval(value, cpp2::move(init));
 
-        auto v {std::strtoll(&CPP2_ASSERT_IN_BOUNDS_LITERAL(value, 0), nullptr, 10)}; // for non-numeric values we'll just get 0 which is okay for now
-        if (cpp2::impl::cmp_less(v,min_value)) {
+        auto v {std::strtoll(&value[0], nullptr, 10)}; // for non-numeric values we'll just get 0 which is okay for now
+        if (v<min_value) {
             min_value = v;
         }
-        if (cpp2::impl::cmp_greater(v,max_value)) {
+        if (v>max_value) {
             max_value = cpp2::move(v);
         }
 
@@ -1685,29 +1694,29 @@ std::string value{"-1"};
     }
 }
 
-#line 1029 "reflect.h2"
+#line 1032 "reflect.h2"
     if ((CPP2_UFCS(empty)(enumerators))) {
         CPP2_UFCS(error)(t, "an enumeration must contain at least one enumerator value");
         return ; 
     }
 
     //  Compute the default underlying type, if it wasn't explicitly specified
-    if (underlying_type.value() == "") 
+    if (underlying_type.value()=="") 
     {
         CPP2_UFCS(require)(t, !(cpp2::move(found_non_numeric)), 
             "if you write an enumerator with a non-numeric-literal value, you must specify the enumeration's underlying type");
 
         if (!(bitwise)) {
-            if (cpp2::impl::cmp_greater_eq(min_value,std::numeric_limits<cpp2::i8>::min()) && cpp2::impl::cmp_less_eq(max_value,std::numeric_limits<cpp2::i8>::max())) {
+            if (min_value>=std::numeric_limits<cpp2::i8>::min() && max_value<=std::numeric_limits<cpp2::i8>::max()) {
                 underlying_type.value() = "i8";
             }
-            else {if (cpp2::impl::cmp_greater_eq(min_value,std::numeric_limits<cpp2::i16>::min()) && cpp2::impl::cmp_less_eq(max_value,std::numeric_limits<cpp2::i16>::max())) {
+            else {if (min_value>=std::numeric_limits<cpp2::i16>::min() && max_value<=std::numeric_limits<cpp2::i16>::max()) {
                 underlying_type.value() = "i16";
             }
-            else {if (cpp2::impl::cmp_greater_eq(min_value,std::numeric_limits<cpp2::i32>::min()) && cpp2::impl::cmp_less_eq(max_value,std::numeric_limits<cpp2::i32>::max())) {
+            else {if (min_value>=std::numeric_limits<cpp2::i32>::min() && max_value<=std::numeric_limits<cpp2::i32>::max()) {
                 underlying_type.value() = "i32";
             }
-            else {if (cpp2::impl::cmp_greater_eq(cpp2::move(min_value),std::numeric_limits<cpp2::i64>::min()) && cpp2::impl::cmp_less_eq(cpp2::move(max_value),std::numeric_limits<cpp2::i64>::max())) {
+            else {if (cpp2::move(min_value)>=std::numeric_limits<cpp2::i64>::min() && cpp2::move(max_value)<=std::numeric_limits<cpp2::i64>::max()) {
                 underlying_type.value() = "i64";
             }
             else {
@@ -1716,13 +1725,13 @@ std::string value{"-1"};
         }
         else {
             auto umax {cpp2::move(max_value) * cpp2::impl::as_<cpp2::u64, 2>()}; 
-            if (cpp2::impl::cmp_less_eq(umax,std::numeric_limits<cpp2::u8>::max())) {
+            if (umax<=std::numeric_limits<cpp2::u8>::max()) {
                 underlying_type.value() = "u8";
             }
-            else {if (cpp2::impl::cmp_less_eq(umax,std::numeric_limits<cpp2::u16>::max())) {
+            else {if (umax<=std::numeric_limits<cpp2::u16>::max()) {
                 underlying_type.value() = "u16";
             }
-            else {if (cpp2::impl::cmp_less_eq(cpp2::move(umax),std::numeric_limits<cpp2::u32>::max())) {
+            else {if (cpp2::move(umax)<=std::numeric_limits<cpp2::u32>::max()) {
                 underlying_type.value() = "u32";
             }
             else {
@@ -1731,7 +1740,7 @@ std::string value{"-1"};
         }
     }
 
-#line 1075 "reflect.h2"
+#line 1078 "reflect.h2"
     //  2. Replace: Erase the contents and replace with modified contents
     //
     //  Note that most values and functions are declared as '==' compile-time values, i.e. Cpp1 'constexpr'
@@ -1740,7 +1749,7 @@ std::string value{"-1"};
 
     //  Generate the 'none' value if appropriate, and use that or
     //  else the first enumerator as the default-constructed value
-    auto default_value {CPP2_ASSERT_IN_BOUNDS_LITERAL(enumerators, 0).name}; 
+    auto default_value {enumerators[0].name}; 
     if (bitwise) {
         default_value = "none";
         value_member_info e {"none", "", "0"}; 
@@ -1779,7 +1788,7 @@ std::string to_string{"    to_string: (this) -> std::string = { \n"};
 
     //  Provide a 'to_string' function to print enumerator name(s)
 
-#line 1120 "reflect.h2"
+#line 1123 "reflect.h2"
     {
         if (bitwise) {
             to_string += "    _ret   : std::string = \"(\";\n";
@@ -1789,9 +1798,9 @@ std::string to_string{"    to_string: (this) -> std::string = { \n"};
 
         for ( 
               auto const& e : cpp2::move(enumerators) ) {
-            if (e.name != "_") {// ignore unnamed values
+            if (e.name!="_") {  // ignore unnamed values
                 if (bitwise) {
-                    if (e.name != "none") {
+                    if (e.name!="none") {
                         to_string += ("    if (this & " + cpp2::to_string(e.name) + ") == " + cpp2::to_string(e.name) + " { _ret += _comma + \"" + cpp2::to_string(e.name) + "\"; _comma = \", \"; }\n");
                     }
                 }
@@ -1811,10 +1820,10 @@ std::string to_string{"    to_string: (this) -> std::string = { \n"};
         CPP2_UFCS(add_member)(t, cpp2::move(to_string));
     }
 }
-#line 1150 "reflect.h2"
+#line 1153 "reflect.h2"
 }
 
-#line 1162 "reflect.h2"
+#line 1165 "reflect.h2"
 auto cpp2_enum(meta::type_declaration& t) -> void
 {
     //  Let basic_enum do its thing, with an incrementing value generator
@@ -1823,7 +1832,7 @@ auto cpp2_enum(meta::type_declaration& t) -> void
             if (!(CPP2_UFCS(empty)(specified_value))) {
                 value = specified_value;
             }else {
-                auto v {std::strtoll(&CPP2_ASSERT_IN_BOUNDS_LITERAL(value, 0), nullptr, 10)}; 
+                auto v {std::strtoll(&value[0], nullptr, 10)}; 
                 value = cpp2::impl::as_<std::string>((cpp2::move(v) + 1));
             }
         }, 
@@ -1831,7 +1840,7 @@ auto cpp2_enum(meta::type_declaration& t) -> void
     );
 }
 
-#line 1189 "reflect.h2"
+#line 1192 "reflect.h2"
 auto flag_enum(meta::type_declaration& t) -> void
 {
     //  Let basic_enum do its thing, with a power-of-two value generator
@@ -1840,8 +1849,8 @@ auto flag_enum(meta::type_declaration& t) -> void
             if (!(CPP2_UFCS(empty)(specified_value))) {
                 value = specified_value;
             }else {
-                auto v {std::strtoll(&CPP2_ASSERT_IN_BOUNDS_LITERAL(value, 0), nullptr, 10)}; 
-                if (cpp2::impl::cmp_less(v,1)) {
+                auto v {std::strtoll(&value[0], nullptr, 10)}; 
+                if (v<1) {
                     value = "1";
                 }
                 else {
@@ -1853,7 +1862,7 @@ auto flag_enum(meta::type_declaration& t) -> void
     );
 }
 
-#line 1235 "reflect.h2"
+#line 1238 "reflect.h2"
 auto cpp2_union(meta::type_declaration& t) -> void
 {
     std::vector<value_member_info> alternatives {}; 
@@ -1862,7 +1871,7 @@ auto value{0};
 
     //  1. Gather: All the user-written members, and find/compute the max size
 
-#line 1242 "reflect.h2"
+#line 1245 "reflect.h2"
     for ( 
 
            auto const& m : CPP2_UFCS(get_members)(t) )  { do 
@@ -1888,22 +1897,22 @@ auto value{0};
     } while (false); ++value; }
 }
 
-#line 1266 "reflect.h2"
+#line 1269 "reflect.h2"
     std::string discriminator_type {}; 
-    if (cpp2::impl::cmp_less(CPP2_UFCS(ssize)(alternatives),std::numeric_limits<cpp2::i8>::max())) {
+    if (CPP2_UFCS(ssize)(alternatives)<std::numeric_limits<cpp2::i8>::max()) {
         discriminator_type = "i8";
     }
-    else {if (cpp2::impl::cmp_less(CPP2_UFCS(ssize)(alternatives),std::numeric_limits<cpp2::i16>::max())) {
+    else {if (CPP2_UFCS(ssize)(alternatives)<std::numeric_limits<cpp2::i16>::max()) {
         discriminator_type = "i16";
     }
-    else {if (cpp2::impl::cmp_less(CPP2_UFCS(ssize)(alternatives),std::numeric_limits<cpp2::i32>::max())) {
+    else {if (CPP2_UFCS(ssize)(alternatives)<std::numeric_limits<cpp2::i32>::max()) {
         discriminator_type = "i32";
     }
     else {
         discriminator_type = "i64";
     }}}
 
-#line 1281 "reflect.h2"
+#line 1284 "reflect.h2"
     //  2. Replace: Erase the contents and replace with modified contents
 
     CPP2_UFCS(remove_marked_members)(t);
@@ -1912,7 +1921,7 @@ std::string storage{"    _storage: cpp2::aligned_storage<cpp2::max( "};
 
     //  Provide storage
 
-#line 1287 "reflect.h2"
+#line 1290 "reflect.h2"
     {
         for ( 
               auto const& e : alternatives ) {
@@ -1932,7 +1941,7 @@ std::string storage{"    _storage: cpp2::aligned_storage<cpp2::max( "};
 }
 
     //  Provide discriminator
-#line 1305 "reflect.h2"
+#line 1308 "reflect.h2"
     CPP2_UFCS(add_member)(t, ("    _discriminator: " + cpp2::to_string(cpp2::move(discriminator_type)) + " = -1;\n"));
 
     //  Add the alternatives: is_alternative, get_alternative, and set_alternative
@@ -1954,7 +1963,7 @@ std::string destroy{"    private _destroy: (inout this) = {\n"};
 
     //  Add destroy
 
-#line 1324 "reflect.h2"
+#line 1327 "reflect.h2"
     {
         for ( 
               auto const& a : alternatives ) {
@@ -1968,7 +1977,7 @@ std::string destroy{"    private _destroy: (inout this) = {\n"};
 }
 
     //  Add the destructor
-#line 1336 "reflect.h2"
+#line 1339 "reflect.h2"
     CPP2_UFCS(add_member)(t, "    operator=: (move this) = { _destroy(); _ = this; }");
 
     //  Add default constructor
@@ -1978,7 +1987,7 @@ std::string value_set{""};
 
     //  Add copy/move construction and assignment
 
-#line 1343 "reflect.h2"
+#line 1346 "reflect.h2"
     {
         for ( 
               auto const& a : cpp2::move(alternatives) ) {
@@ -1998,16 +2007,16 @@ std::string value_set{""};
                     );
     }
 }
-#line 1361 "reflect.h2"
+#line 1364 "reflect.h2"
 }
 
-#line 1368 "reflect.h2"
+#line 1371 "reflect.h2"
 auto print(cpp2::impl::in<meta::type_declaration> t) -> void
 {
     std::cout << CPP2_UFCS(print)(t) << "\n";
 }
 
-#line 1387 "reflect.h2"
+#line 1390 "reflect.h2"
 auto regex_gen(meta::type_declaration& t) -> void
 {
     auto has_default {false}; 
@@ -2027,7 +2036,7 @@ auto regex_gen(meta::type_declaration& t) -> void
             }
             CPP2_UFCS(mark_for_removal_from_enclosing_type)(m);
 
-            if (name == prefix) {
+            if (name==prefix) {
                 if (has_default) {
                     CPP2_UFCS(error)(t, "Type can only contain one default named regular expression.");
                 }
@@ -2044,7 +2053,7 @@ auto regex_gen(meta::type_declaration& t) -> void
                 name = CPP2_UFCS(substr)(name, 0, CPP2_UFCS(size)(name) - CPP2_UFCS(size)(postfix));
 
                 if (CPP2_UFCS(contains)(expressions, name)) {
-                    CPP2_ASSERT_IN_BOUNDS(expressions, name).second = cpp2::move(expr);
+                    expressions[name].second = cpp2::move(expr);
                 }
                 else {
                     CPP2_UFCS(error)(t, "Expression modifier defined without expression.");
@@ -2052,10 +2061,10 @@ auto regex_gen(meta::type_declaration& t) -> void
 
             }
             else {
-                CPP2_ASSERT_IN_BOUNDS(expressions, name) = std::make_pair(cpp2::move(expr), "");
+                expressions[name] = std::make_pair(cpp2::move(expr), "");
             }
 
-#line 1435 "reflect.h2"
+#line 1438 "reflect.h2"
         }
     }
 
@@ -2069,7 +2078,7 @@ auto regex_gen(meta::type_declaration& t) -> void
     }
 }
 
-#line 1453 "reflect.h2"
+#line 1456 "reflect.h2"
 [[nodiscard]] auto apply_metafunctions(
     declaration_node& n, 
     type_declaration& rtype, 
@@ -2083,7 +2092,7 @@ auto regex_gen(meta::type_declaration& t) -> void
     for ( 
           auto const& m : CPP2_UFCS(get_members)(rtype) ) 
     {
-        CPP2_UFCS(require)(m, !(CPP2_UFCS(starts_with)(CPP2_UFCS(name)(m), "_")) || CPP2_UFCS(ssize)(CPP2_UFCS(name)(m)) == 1, 
+        CPP2_UFCS(require)(m, !(CPP2_UFCS(starts_with)(CPP2_UFCS(name)(m), "_")) || CPP2_UFCS(ssize)(CPP2_UFCS(name)(m))==1, 
                     "a type that applies a metafunction cannot have a body that declares a name that starts with '_' - those names are reserved for the metafunction implementation");
     }
 
@@ -2093,67 +2102,67 @@ auto regex_gen(meta::type_declaration& t) -> void
     {
         //  Convert the name and any template arguments to strings
         //  and record that in rtype
-        auto name {CPP2_UFCS(to_string)((*cpp2::impl::assert_not_null(meta)))}; 
+        auto name {CPP2_UFCS(to_string)((*meta))}; 
         name = CPP2_UFCS(substr)(name, 0, CPP2_UFCS(find)(name, '<'));
 
         std::vector<std::string> args {}; 
         for ( 
-             auto const& arg : CPP2_UFCS(template_arguments)((*cpp2::impl::assert_not_null(meta))) ) 
+             auto const& arg : CPP2_UFCS(template_arguments)((*meta)) ) 
             CPP2_UFCS(push_back)(args, CPP2_UFCS(to_string)(arg));
 
         CPP2_UFCS(set_metafunction_name)(rtype, name, args);
 
         //  Dispatch
         //
-        if (name == "interface") {
+        if (name=="interface") {
             interface(rtype);
         }
-        else {if (name == "polymorphic_base") {
+        else {if (name=="polymorphic_base") {
             polymorphic_base(rtype);
         }
-        else {if (name == "ordered") {
+        else {if (name=="ordered") {
             ordered(rtype);
         }
-        else {if (name == "weakly_ordered") {
+        else {if (name=="weakly_ordered") {
             weakly_ordered(rtype);
         }
-        else {if (name == "partially_ordered") {
+        else {if (name=="partially_ordered") {
             partially_ordered(rtype);
         }
-        else {if (name == "copyable") {
+        else {if (name=="copyable") {
             copyable(rtype);
         }
-        else {if (name == "basic_value") {
+        else {if (name=="basic_value") {
             basic_value(rtype);
         }
-        else {if (name == "value") {
+        else {if (name=="value") {
             value(rtype);
         }
-        else {if (name == "weakly_ordered_value") {
+        else {if (name=="weakly_ordered_value") {
             weakly_ordered_value(rtype);
         }
-        else {if (name == "partially_ordered_value") {
+        else {if (name=="partially_ordered_value") {
             partially_ordered_value(rtype);
         }
-        else {if (name == "cpp1_rule_of_zero") {
+        else {if (name=="cpp1_rule_of_zero") {
             cpp1_rule_of_zero(rtype);
         }
-        else {if (name == "struct") {
+        else {if (name=="struct") {
             cpp2_struct(rtype);
         }
-        else {if (name == "enum") {
+        else {if (name=="enum") {
             cpp2_enum(rtype);
         }
-        else {if (name == "flag_enum") {
+        else {if (name=="flag_enum") {
             flag_enum(rtype);
         }
-        else {if (name == "union") {
+        else {if (name=="union") {
             cpp2_union(rtype);
         }
-        else {if (name == "print") {
+        else {if (name=="print") {
             print(rtype);
         }
-        else {if (name == "regex") {
+        else {if (name=="regex") {
             regex_gen(rtype);
         }
         else {
@@ -2167,7 +2176,7 @@ auto regex_gen(meta::type_declaration& t) -> void
             && !(CPP2_UFCS(arguments_were_used)(rtype)))) 
 
         {
-            error(name + " did not use its template arguments - did you mean to write '" + name + " <" + CPP2_ASSERT_IN_BOUNDS_LITERAL(cpp2::move(args), 0) + "> type' (with the spaces)?");
+            error(name + " did not use its template arguments - did you mean to write '" + name + " <" + cpp2::move(args)[0] + "> type' (with the spaces)?");
             return false; 
         }
     }
@@ -2175,7 +2184,7 @@ auto regex_gen(meta::type_declaration& t) -> void
     return true; 
 }
 
-#line 1559 "reflect.h2"
+#line 1562 "reflect.h2"
 }
 
 }
diff --git a/source/reflect.h2 b/source/reflect.h2
index 1a11b4d26..afa7c9024 100644
--- a/source/reflect.h2
+++ b/source/reflect.h2
@@ -346,8 +346,11 @@ function_declaration: @copyable type =
     index_of_parameter_named     : (this, s: std::string_view) -> int  = n*.index_of_parameter_named(s);
     has_parameter_named          : (this, s: std::string_view) -> bool = n*.has_parameter_named(s);
     has_in_parameter_named       : (this, s: std::string_view) -> bool = n*.has_in_parameter_named(s);
+    has_copy_parameter_named     : (this, s: std::string_view) -> bool = n*.has_copy_parameter_named(s);
+    has_inout_parameter_named    : (this, s: std::string_view) -> bool = n*.has_inout_parameter_named(s);
     has_out_parameter_named      : (this, s: std::string_view) -> bool = n*.has_out_parameter_named(s);
     has_move_parameter_named     : (this, s: std::string_view) -> bool = n*.has_move_parameter_named(s);
+    has_forward_parameter_named  : (this, s: std::string_view) -> bool = n*.has_forward_parameter_named(s);
     first_parameter_name         : (this) -> std::string               = n*.first_parameter_name();
 
     has_parameter_with_name_and_pass: (this, s: std::string_view, pass: passing_style) -> bool
diff --git a/source/sema.h b/source/sema.h
index d558d5bed..6c4f2ecf6 100644
--- a/source/sema.h
+++ b/source/sema.h
@@ -201,8 +201,6 @@ struct compound_sym {
 };
 
 struct symbol {
-    int  depth = -1;
-
     enum active { declaration=0, identifier, selection, compound };
     std::variant <
         declaration_sym,
@@ -211,12 +209,13 @@ struct symbol {
         compound_sym
     > sym;
 
+    int  depth = -1;
     bool start = true;
 
-    symbol(int depth, declaration_sym const& sym) : depth{depth}, sym{sym}, start{sym.start} { }
-    symbol(int depth, identifier_sym  const& sym) : depth{depth}, sym{sym}, start{!sym.is_deactivation()} { }
-    symbol(int depth, selection_sym   const& sym) : depth{depth}, sym{sym}, start{sym.start} { }
-    symbol(int depth, compound_sym    const& sym) : depth{depth}, sym{sym}, start{sym.start} { }
+    symbol(int depth, declaration_sym const& sym) : sym{sym}, depth{depth}, start{sym.start} { }
+    symbol(int depth, identifier_sym  const& sym) : sym{sym}, depth{depth}, start{!sym.is_deactivation()} { }
+    symbol(int depth, selection_sym   const& sym) : sym{sym}, depth{depth}, start{sym.start} { }
+    symbol(int depth, compound_sym    const& sym) : sym{sym}, depth{depth}, start{sym.start} { }
 
     auto is_declaration() const -> bool  { return sym.index() == declaration; }
     auto is_identifier () const -> bool  { return sym.index() == identifier ; }
@@ -366,52 +365,23 @@ auto is_definite_last_use(token const* t)
 //
 //-----------------------------------------------------------------------
 //
-
-//  Optimization helper: We'll cache results of calls to get_declaration_of
-//  in an unordered_map, using this struct for the g_d_o params as a key
-//
-struct gdo_params {
-    token const* pt; bool a; bool b;
-    auto operator<=>(gdo_params const&) const -> std::strong_ordering = default;
-};
-}
-namespace std {
-    template <>
-    struct hash<cpp2::gdo_params> {
-        auto operator()(const cpp2::gdo_params& key) const -> std::size_t {
-            return std::hash<cpp2::token const*>()(key.pt); // first is enough
-        }
-    };
-}
-namespace cpp2 {
-
-
-//  Now back to class sema...
-//
 class sema
 {
 public:
     std::vector<error_entry>& errors;
     stable_vector<symbol>     symbols;
+    index_t                   global_token_counter = 1;
 
     std::vector<selection_statement_node const*> active_selections;
+    std::vector<declaration_sym          const*> current_declarations;
 
-    //  The following data is for lookup optimization
-    //
-    mutable std::unordered_map< gdo_params, declaration_sym const* > gdo_cached_results;
-
-    struct declaration_start {
-        int                                   token_order;
-        stable_vector<symbol>::const_iterator iter;
-
-        declaration_start( int to, cpp2::stable_vector<symbol>::const_iterator it)
-            : token_order{to}
-            , iter{it}
-        { }
-
-        auto operator<=>(int to) const { return token_order <=> to; }
+    struct declaration_of_t {
+        declaration_sym const* sym;
+        bool                   in_current_function;
+        bool                   prev_token_was_this = false;
+        declaration_sym const* this_param_sym      = {};
     };
-    mutable stable_vector< declaration_start > declaration_starts;
+    std::unordered_map< token const*, declaration_of_t > declaration_of;
 
 public:
     //-----------------------------------------------------------------------
@@ -424,7 +394,6 @@ class sema
     )
         : errors{ errors_ }
     {
-        declaration_starts.emplace_back( -1, symbols.cbegin() );
     }
 
     //  Get the declaration of t within the same named function or beyond it
@@ -433,47 +402,36 @@ class sema
     auto get_declaration_of(
         token const* t,
         bool         look_beyond_current_function = false,
-        bool         include_implicit_this        = false,
-        bool         include_returns              = true
+        bool         include_implicit_this        = false
     ) const
         -> declaration_sym const*
     {
         if (!t) {
             return {};
         }
-        return get_declaration_of(*t, look_beyond_current_function, include_implicit_this, include_returns );
+        return get_declaration_of(*t, look_beyond_current_function, include_implicit_this );
     }
 
-    //-----------------------------------------------------------------------
-    //  Until I'm confident these optimizations are solid, use this dispatcher
-    //  to check for regression bugs by invoking both versions and comparing
-    //  the cached overall result, and the initial start for the table scan
-    //
-    mutable stable_vector<symbol>::const_iterator initial_find_old;
-    mutable stable_vector<symbol>::const_iterator initial_find_new;
-
     auto get_declaration_of(
         token const& t,
         bool         look_beyond_current_function = false,
-        bool         include_implicit_this        = false,
-        bool         include_returns              = true
+        bool         include_implicit_this        = false
     ) const
         -> declaration_sym const*
     {
         //--------- START TEMPORARY REGRESSION TEST CODE FOR G_D_O OPTIMIZATION VERIFICATION ---------
         auto result_old = static_cast<declaration_sym const*>(nullptr);
-        auto result_new = static_cast<declaration_sym const*>(nullptr);
         if (flag_internal_debug)
         {
             auto debug = false; // t == "xxx" && t.position().colno > 20;
             if (debug)
             {
-                std::cout << "\nlooking up " << t.as_string_view() << " (" << static_cast<void const*>(&t) << ", " << look_beyond_current_function << ", " << include_implicit_this << ", " << include_returns << ") from " << t.position().to_string();
+                std::cout << "\nlooking up " << t.as_string_view() << " (" << static_cast<void const*>(&t) << ", " << look_beyond_current_function << ", " << include_implicit_this << ") from " << t.position().to_string();
                 std::cout << " ... symbol table state is:\n";
                 debug_print(std::cout);
             }
 
-            result_old = get_declaration_of_old(t, look_beyond_current_function, include_implicit_this, include_returns );
+            result_old = get_declaration_of_old(t, look_beyond_current_function, include_implicit_this );
 
             if (debug) {
                 std::cout << "\n  found -> " << static_cast<void const*>(result_old);
@@ -481,30 +439,67 @@ class sema
         }
         //--------- END TEMPORARY REGRESSION TEST CODE FOR G_D_O OPTIMIZATION VERIFICATION -----------
 
-        auto timer = scope_timer("get_declaration_of_new - including external caching");
+        //  Calculate result using declaration_of[]
+        auto result = static_cast<declaration_sym const*>(nullptr);
 
-        //  Check the cache first to avoid duplicate computations
-        //
-        auto my_params = gdo_params{&t, look_beyond_current_function, include_implicit_this};
-        if (auto probe = gdo_cached_results.find(my_params);
-            probe != gdo_cached_results.cend()
-            )
         {
-            //  Ignore the internal debug comparison data since the
-            //  cached version didn't need to recompute it
-            initial_find_new = initial_find_old = symbols.cbegin();
+            auto d = declaration_of.find(&t);
 
-            result_new = probe->second;
-        }
-        else
-        {
-            result_new =
-                get_declaration_of_new(t, look_beyond_current_function, include_implicit_this, include_returns );
+            if (d != declaration_of.cend())
+            {
+                //  If we're asked to include implicit this,
+                //  and t itself is not 'this' and not qualified with 'this.`,
+                //  and there's a 'this' result available, then use that
+                if (
+                    include_implicit_this
+                    && t != "this"
+                    && !d->second.prev_token_was_this
+                    && d->second.this_param_sym
+                    )
+                {
+                    result = d->second.this_param_sym;
+                }
+                //  Otherwise just use the main result
+                else
+                {
+                    //assert( d->second.sym && d->second.sym->declaration->has_name(t) );
+                    result = d->second.sym;
+                }
+            }
 
-            //  Store if not null (null lookups can sometimes change to non-null when repeated later)
-            if (result_new) {
-                gdo_cached_results[my_params] = result_new;
+            //  Now we have the lookup result, but based on lookup constraints flags
+            //  we may decide it's unsuitable for this lookup and not use it...
+            //
+            //  TODO: The initial versions of these conditions are written to make the
+            //  new lookup results exactly match the prior lookup results, so we don't
+            //  introduce regressions. However, not all these wrinkles may be needed
+            //  or desirable, so after we know we didn't introduce regressions we can
+            //  consider tweaking/simplifying them -- which is easier now that they're
+            //  collected all in one place
+            if (
+                result
+                //  If we were told not to look beyond the current function
+                && !look_beyond_current_function
+                //  And we're not already using the 'this' parameter which is local
+                && result != d->second.this_param_sym
+                //  And this result isn't our own function-local object declaration
+                && !(
+                    d->second.sym->declaration->identifier->get_token() == &t
+                    && d->second.sym->declaration->is_object()
+                    && d->second.sym->declaration->parent_is_function()
+                    )
+                //  And this result is not in the current function
+                //  or we weren't in a function to begin with
+                && (
+                    !d->second.in_current_function
+                    || !d->second.sym->declaration->parent_is_function()
+                    )
+                )
+            {
+                //  Then don't use the result, return 'not found' instead
+                result = nullptr;
             }
+
         }
 
         //--------- START TEMPORARY REGRESSION TEST CODE FOR G_D_O OPTIMIZATION VERIFICATION ---------
@@ -512,10 +507,7 @@ class sema
         //
         if (
             flag_internal_debug
-            && (
-                initial_find_old != initial_find_new
-                || result_old != result_new
-                )
+            && result_old != result
             )
         {
             std::cerr << "\n  Internal compiler error - see cppfront-ice-data.out for debug information\n\n";
@@ -523,16 +515,13 @@ class sema
             auto out = std::ofstream{"cppfront-ice-data.out"};
 
             out << "g_d_o arguments:\n";
-            out << "    " << static_cast<void const*>(&t) << " -> " << t.as_string_view() << " (on line " << t.position().lineno
-                << "), token order # " << t.get_global_token_order() << "\n";
-            out << "    " << std::boolalpha << look_beyond_current_function << "\n";
-            out << "    " << std::boolalpha << include_implicit_this << "\n";
-
-            out << "initial_find_old: " << (initial_find_old - symbols.cbegin()) << "\n";
-            out << "initial_find_new: " << (initial_find_new - symbols.cbegin()) << "\n\n";
+            out << "    " << static_cast<void const*>(&t) << " -> " << t.as_string_view() << " @ " << t.position().to_string()
+                << ", token order # " << t.get_global_token_order() << "\n";
+            out << "    look_beyond_current_function: " << std::boolalpha << look_beyond_current_function << "\n";
+            out << "    include_implicit_this:        " << std::boolalpha << include_implicit_this        << "\n";
 
-            out << "result_old: "       << static_cast<void const*>(result_old) << "\n";
-            out << "result_new: "       << static_cast<void const*>(result_new) << "\n\n";
+            out << "result_old:    "       << static_cast<void const*>(result_old) << "\n";
+            out << "result:        "       << static_cast<void const*>(result    ) << "\n\n";
 
             debug_print(out);
 
@@ -540,7 +529,7 @@ class sema
         }
         //--------- END TEMPORARY REGRESSION TEST CODE FOR G_D_O OPTIMIZATION VERIFICATION -----------
 
-        return result_new;
+        return result;
     }
 
     //-----------------------------------------------------------------------
@@ -549,12 +538,11 @@ class sema
     auto get_declaration_of_old(
         token const& t,
         bool         look_beyond_current_function = false,
-        bool         include_implicit_this        = false,
-        bool         include_returns              = true
+        bool         include_implicit_this        = false
     ) const
         -> declaration_sym const*
     {
-        auto timer  = scope_timer("get_declaration_of - old");
+        CPP2_SCOPE_TIMER("get_declaration_of - old");
 
         //  First find the position the query is coming from
         //  and remember its depth
@@ -571,8 +559,6 @@ class sema
             return nullptr;
         }
 
-        initial_find_old = i;
-
         auto depth = 0;
 
         //  If we found it exactly, we have its depth
@@ -695,7 +681,6 @@ class sema
                 if (
                     decl.identifier
                     && *decl.identifier == t
-                    && (!decl.return_param || include_returns )
                     )
                 {
                     return &decl;
@@ -739,248 +724,6 @@ class sema
         return nullptr;
     }
 
-    //-----------------------------------------------------------------------
-    //  Optimized version:
-    //
-    auto get_declaration_of_new(
-        token const& t,
-        bool         look_beyond_current_function = false,
-        bool         include_implicit_this        = false,
-        bool         include_returns              = true
-    ) const
-        -> declaration_sym const*
-    {
-        auto timer = scope_timer("get_declaration_of_new");
-
-        //  First find the position the query is coming from
-        //  and remember its depth
-        auto i = symbols.cbegin();
-        auto depth = 0;
-
-        {
-        auto timer1 = scope_timer("get_declaration_of_new - phase 1 initial loop");
-
-        //  If the declaration_starts list got this far yet, use that to
-        //  skip repeating the whole linear search from the table beginning
-        //
-        auto probe = std::lower_bound(
-                        declaration_starts.begin(),
-                        declaration_starts.end(),
-                        t.get_global_token_order()
-                    );
-        if (probe != declaration_starts.end())
-        {
-            if (probe->iter->get_global_token_order() != t.get_global_token_order()) {
-                --probe;
-            }
-            i = probe->iter;
-        }
-
-        //  Else resume appending values to the declaration_starts list
-        //
-        else
-        {
-            //  Start right after where we left off
-            i = declaration_starts.back().iter;
-        }
-
-        while (
-            i != symbols.cend()
-            && i->get_global_token_order() < t.get_global_token_order()
-            )
-        {
-            if (
-                i->is_declaration()
-                && i->as_declaration().start
-                )
-            {
-                if (auto to = i->get_global_token_order();
-                    to > 0
-                    && declaration_starts.back().token_order < to)
-                {
-                    declaration_starts.emplace_back( to, i );
-                }
-            }
-
-            ++i;
-        }
-
-        if (i == symbols.cbegin()) {
-            return nullptr;
-        }
-
-        initial_find_new = i;
-
-        //  If we found it exactly, we have its depth
-        if (
-            i != symbols.cend()
-            && i->get_global_token_order() == t.get_global_token_order()
-            )
-        {
-            depth = i->depth;
-        }
-        //  Else we're at cend or at the entry for the following token,
-        //  so move backward one entry to approximate the location
-        else
-        {
-            //  OK since we already checked that we're not at cbegin
-            --i;
-
-            //  If we're now at cbegin, not found
-            if (i == symbols.cbegin()) {
-                return nullptr;
-            }
-
-            //  Else if this location is the end of a named non-object
-            //  declaration, go to its beginning
-            if (i->is_declaration())
-            {
-                auto find_start_of_name = static_cast<token const*>(nullptr);
-
-                if (
-                    !i->start
-                    && !i->as_declaration().declaration->is_object()
-                    )
-                {
-                    find_start_of_name = i->as_declaration().declaration->name();
-                }
-
-                if (find_start_of_name)
-                {
-                    //  We want to go backwards until we're at the corresponding
-                    //  declaration start, and there could be intervening nested
-                    //  declaration ends/starts to pass by
-                    int relative_decl_depth = 1;
-                    while (--i != symbols.cbegin()) {
-                        if (
-                            i->is_declaration()
-                            && !i->as_declaration().declaration->is_object()
-                            )
-                        {
-                            if (i->start) {
-                                --relative_decl_depth;
-                                if (relative_decl_depth == 0) {
-                                    //  With proper nesting, this should be the name we're looking for
-                                    assert(
-                                        i->as_declaration().declaration->has_name(
-                                            find_start_of_name->as_string_view()
-                                        )
-                                    );
-                                    break;
-                                }
-                            }
-                            else {
-                                ++relative_decl_depth;
-                            }
-                        }
-                    }
-
-                    //  This shouldn't happen with correct nesting, so
-                    //  alternatively we could assert(i != symbols.cbegin())
-                    if (i == symbols.cbegin()) {
-                        return nullptr;
-                    }
-                }
-            }
-
-            depth = i->depth;
-        }
-        }
-
-        auto timer2 = scope_timer("get_declaration_of_new - phase 2 backward scan loop");
-
-        //  Then look backward to find the first declaration of
-        //  this name that is not deeper (in a nested scope)
-        //  and is in the same function
-        using I = stable_vector<symbol>::const_iterator;
-        auto advance = [](I& i, int n, I bound) {  // TODO Use `std::ranges::advance`
-            auto timer2a = scope_timer("get_declaration_of_new - phase 2a 'advance' part of loop");
-            auto in = i;
-            if (std::abs(n) >= std::abs(bound - i)) {
-                i = bound;
-            }
-            else {
-                auto timer2aa = scope_timer("get_declaration_of_new - phase 2aa 'std::advance' specifically");
-                std::advance(i, n);
-            }
-            return n - (i - in);
-        };
-        advance(i, -int(i->position() > t.position()), symbols.cbegin());
-        advance(i, 1, symbols.cend());
-        while (advance(i, -1, symbols.begin()) == 0)
-        {
-            if (
-                i->sym.index() == symbol::active::declaration
-                && i->depth <= depth
-                )
-            {
-                auto const& decl = std::get<symbol::active::declaration>(i->sym);
-
-                //  Conditionally look beyond the start of the current named (has identifier)
-                //  function (an unnamed function is ok to look beyond) or enclosing scope
-                assert(decl.declaration);
-                if (
-                    (
-                        decl.declaration->type.index() == declaration_node::a_function
-                     || decl.declaration->type.index() == declaration_node::a_type
-                     || decl.declaration->type.index() == declaration_node::a_namespace
-                        )
-                    && decl.declaration->identifier
-                    && !look_beyond_current_function
-                    )
-                {
-                    return nullptr;
-                }
-
-                //  If the name matches, this is it
-                if (
-                    decl.identifier
-                    && *decl.identifier == t
-                    && (!decl.return_param || include_returns )
-                    )
-                {
-                    return &decl;
-                }
-
-                auto timer2b = scope_timer("get_declaration_of_new - phase 2b 'move this' part of loop");
-
-                //  If we reached a 'move this' parameter, look it up in the type members
-                if (
-                    include_implicit_this
-                    && decl.identifier
-                    && *decl.identifier == "this"
-                    )
-                {
-                    if (auto n = decl.declaration;
-                        decl.parameter
-                        && decl.parameter->pass == passing_style::move
-                        && n
-                        && n->parent_is_function()
-                        && (n = n->parent_declaration)->parent_is_type()
-                        && n->my_statement
-                        && n->my_statement->compound_parent
-                        && std::any_of(
-                               n->my_statement->compound_parent->statements.begin(),
-                               n->my_statement->compound_parent->statements.end(),
-                               [&t, n](std::unique_ptr<statement_node> const& s) mutable {
-                                   return s
-                                          && s->statement.index() == statement_node::declaration
-                                          && (n = &*std::get<statement_node::declaration>(s->statement))->identifier
-                                          && n->identifier->to_string() == t;
-                               })
-                        )
-                    {
-                        return &decl;
-                    }
-                    return nullptr;
-                }
-
-                depth = i->depth;
-            }
-        }
-
-        return nullptr;
-    }
 
     auto is_captured(token const& t) const
         -> bool
@@ -1024,23 +767,19 @@ class sema
         -> void
     {
         o << "---------------------------------------------------------------------------\n";
-        o << "cached_results: size " << gdo_cached_results.size() << "\n";
-        o << "          & tok       flags     maps to\n";
-
-        for (auto& e : gdo_cached_results) {
-            o << "    (" << static_cast<void const*>(e.first.pt) << ", " << e.first.a << ", " << e.first.b
-                << ") -> " << static_cast<void const*>(e.second) << "\n";
-        }
-
-        o << "\n---------------------------------------------------------------------------\n";
+        o << "declaration_of: size " << declaration_of.size() << "\n";
+        o << "   & tok            #tok    & sym            identifier      #tok  in_curr_fn prev_was_this & this_param_sym\n";
 
-        o << "declaration_starts: size " << declaration_starts.size() << "\n";
-        o << "   idx     tok#    maps to\n";
-
-        for (auto i = 0; auto& e : declaration_starts) {
-            o << std::setw(6) << std::right << i++ << " | ";
-            o << std::setw(6) << std::right << e.token_order
-              << " -> symbols[" << (e.iter - symbols.cbegin()) << "]\n";
+        for (auto& e : declaration_of) {
+            o   << "   " << static_cast<void const*>(e.first)
+                << " " << std::setw(4) << std::right << e.first->get_global_token_order()
+                << " -> " << static_cast<void const*>(e.second.sym)
+                << " " << std::setw(16) << (e.second.sym && e.second.sym->identifier ? e.second.sym->identifier->as_string_view() : "(null)")
+                << std::setw(4) << std::right << (e.second.sym && e.second.sym->identifier ? e.second.sym->identifier->get_global_token_order() : 0)
+                << "  " << std::setw(10) << std::left << e.second.in_current_function
+                << " " << std::setw(13) << e.second.prev_token_was_this
+                << " " << static_cast<void const*>(e.second.this_param_sym)
+                << "\n";
         }
 
         o << "\n---------------------------------------------------------------------------\n";
@@ -2655,6 +2394,7 @@ class sema
     {
         indices_of_uses_per_scope.emplace_back();
         indices_of_activations_per_scope.emplace_back();
+        current_declarations.push_back( nullptr );  // represent a lifetime scope as a null declaration
     }
 
     auto push_use(identifier_sym sym) -> void
@@ -2708,6 +2448,13 @@ class sema
             }
         }
 
+        //  All the scope-local names stay active for lookup until the end of their scope
+        while (current_declarations.back()) {
+            current_declarations.pop_back();
+        }
+        assert(!current_declarations.back());   // we're popping a lifetime scope
+        current_declarations.pop_back();
+
         indices_of_uses_per_scope.pop_back();
         indices_of_activations_per_scope.pop_back();
     }
@@ -2773,6 +2520,7 @@ class sema
 
         if (n.pass != passing_style::out) {
             push_activation( declaration_sym( true, n.declaration.get(), n.declaration->name(), n.declaration->initializer.get(), &n, inside_returns_list));
+            current_declarations.push_back( &symbols.back().as_declaration() );
         }
     }
 
@@ -2848,6 +2596,7 @@ class sema
             )
         {
             push_activation( declaration_sym( true, &n, n.name(), n.initializer.get(), inside_out_parameter, false, inside_returns_list ) );
+            current_declarations.push_back( &symbols.back().as_declaration() );
             if (!n.is_object()) {
                 ++scope_depth;
             }
@@ -2880,6 +2629,21 @@ class sema
             )
         {
             symbols.emplace_back( scope_depth, declaration_sym( false, &n, nullptr, nullptr, inside_out_parameter, false, inside_returns_list ) );
+
+            //  All scoped entities stay active for lookup until the end of their enclosing
+            //  entity -- so we only remove nested entities, not the current entity
+            while (
+                !current_declarations.back()
+                || current_declarations.back()->declaration != &n
+                )
+            {
+                current_declarations.pop_back();
+            }
+            assert(
+                current_declarations.back()
+                && current_declarations.back()->declaration == &n   // we're popping the corresponding declaration
+            );
+
             if (!n.is_object()) {
                 --scope_depth;
             }
@@ -2903,6 +2667,10 @@ class sema
 
     auto start(token const& t, int) -> void
     {
+        //  By giving tokens an order during sema
+        //  generated code can be equally checked
+        t.set_global_token_order( global_token_counter++ );
+
         auto guard = finally([&]() {
             prev2_token = prev_token;
             prev_token = &t;
@@ -2943,10 +2711,100 @@ class sema
             return;
         }
 
-        //  By giving tokens an order during sema
-        //  generated code can be equally checked
-        static index_t global_token_counter = 1;            // TODO static
-        t.set_global_token_order( global_token_counter++ );
+        //  If normal name lookup finds this name from here,
+        //  remember its point of declaration
+        auto in_current_function = true;
+        auto found_this          = static_cast<declaration_sym const*>( nullptr );
+        auto prev_token_was_this = false;
+        auto i = current_declarations.rbegin();
+        for (
+            ;
+            i != current_declarations.rend();
+            ++i
+            )
+        {
+            //  Ignore null == scope begin/end, that's a placeholder not a real declaration
+            if (*i == nullptr) {
+                continue;
+            }
+
+            //  If we're going beyond the initial named function, remember that
+            if (
+                (
+                    (*i)->declaration->is_function()
+                    || (*i)->declaration->is_type()
+                    || (*i)->declaration->is_namespace()
+                    )
+                && (*i)->declaration->identifier
+                )
+            {
+                in_current_function = false;
+            }
+
+            //  Else:
+            //  If we found it exactly
+            if ((*i)->declaration->has_name(t))
+            {
+                //  SUCCESS: Record it and break
+                //declaration_of[&t] = { *i, in_current_function && (*i)->declaration->parent_is_function() };
+                break;
+            }
+
+            //  Else:
+
+            //  If we reached a 'move this' parameter, look it up in the type members
+            if (
+                !found_this
+                && (*i)->declaration->has_name("this")
+                && (*i)->parameter
+                && (*i)->parameter->pass == passing_style::move // TODO: consider removing this
+                )
+            {
+                if (auto n = (*i)->declaration;
+                    (*i)->parameter
+                    && (*i)->parameter->pass == passing_style::move
+                    && n
+                    && n->parent_is_function()
+                    && (n = n->parent_declaration)->parent_is_type()
+                    && n->my_statement
+                    && n->my_statement->compound_parent
+                    && std::any_of(
+                            n->my_statement->compound_parent->statements.begin(),
+                            n->my_statement->compound_parent->statements.end(),
+                            [&t, n](std::unique_ptr<statement_node> const& s) mutable {
+                                return s
+                                        && s->statement.index() == statement_node::declaration
+                                        && (n = &*std::get<statement_node::declaration>(s->statement))->identifier
+                                        && n->identifier->to_string() == t;
+                            })
+                    )
+                {
+                    //  PARTIAL SUCCESS: Record the location of 'this' and keep going
+                    //
+                    found_this = *i;
+                    prev_token_was_this = *prev2_token == "this" && *prev_token == ".";
+                    //declaration_of[&t] = { *i, in_current_function, *prev2_token == "this" && *prev_token == "." };
+                }
+            }
+        }
+
+        if (i != current_declarations.rend()) {
+            declaration_of[&t] = {
+                *i,
+                in_current_function && (*i)->declaration->parent_is_function(),
+                prev_token_was_this,
+                found_this
+            };
+        }
+        else if (found_this) {
+            declaration_of[&t] = {
+                nullptr,
+                false,
+                prev_token_was_this,
+                found_this
+            };
+        }
+
 
         auto started_member_access =
             prev_token
@@ -3007,7 +2865,7 @@ class sema
                     }
                     accessed_member_for_ufcs = nullptr;
                 }
-                else if (auto decl = get_declaration_of(t, false, !started_this_member_access, !started_member_access);
+                else if (auto decl = get_declaration_of(t, false, !started_this_member_access);
                     decl
                     && decl->declaration->name() != &t
                     )
diff --git a/source/to_cpp1.h b/source/to_cpp1.h
index 6a86b4efb..79289105b 100644
--- a/source/to_cpp1.h
+++ b/source/to_cpp1.h
@@ -2379,13 +2379,14 @@ class cppfront
                     is_parameter_name
                     && (
                         current_functions.back().decl->has_in_parameter_named(*tok)
+                        || current_functions.back().decl->has_copy_parameter_named(*tok)
                         || current_functions.back().decl->has_move_parameter_named(*tok)
                         )
                     )
                 {
                     errors.emplace_back(
                         n.position(),
-                        "a 'forward' return type cannot return an 'in' or 'move' parameter"
+                        "a 'forward' return type cannot return an 'in', 'copy', or 'move' parameter"
                     );
                     return;
                 }
@@ -2406,7 +2407,7 @@ class cppfront
                 {
                     errors.emplace_back(
                         n.position(),
-                        "a 'forward' return type cannot return a temporary variable"
+                        "a 'forward' return type must return an 'inout', 'out', or 'forward' parameter; it cannot return a complex expression -- for example: for a function that takes a stream object 'output`, instead of 'return output << data;' write 'output << data; return output;'"
                     );
                     return;
                 }