cpp11 0.4.7

• Internal changes requested by CRAN to fix invalid format string tokens
  (@paleolimbot, #345).

cpp11 0.4.6

• R >=3.5.0 is now required to use cpp11. This is in line with (and even goes
  beyond) the tidyverse standard of supporting the previous 5 minor releases of
  R. It also ensures that R_UnwindProtect() is available to avoid C++ memory
  leaks (#332).

• cpp11::preserved.release_all() has been removed. This was intended to
  support expert developers on R <3.5.0 when cpp11 used a global protection
  list. Since cpp11 no longer uses a global protection list and requires R

  =3.5.0, it is no longer needed. As far as we can tell, no package was
  actively using this (#332).

• cpp11 now creates one protection list per compilation unit, rather than one
  global protection list shared across compilation units and across packages.
  This greatly reduces the complexity of managing the protection list state and
  should make it easier to make changes to the protection list structure in the
  future without breaking packages compiled with older versions of cpp11 (#330).

• Nested calls to cpp11::unwind_protect() are no longer supported or
  encouraged. Previously, this was something that could be done for performance
  improvements, but ultimately this feature has proven to cause more problems
  than it is worth and is very hard to use safely. For more information, see the
  new vignette("FAQ") section titled "Should I call cpp11::unwind_protect()
  manually?" (#327).

• The features and bug fixes from cpp11 0.4.4 have been added back in.

cpp11 0.4.5

• On 2023-07-20, cpp11 was temporarily rolled back to 0.4.3 manually by CRAN due
  to a bug in 0.4.4 which we could not immediately fix due to the cpp11
  maintainer being on vacation.

cpp11 0.4.4

• Davis Vaughan is now the maintainer.

• as_doubles() and as_integers() now propagate missing values correctly
  (#265, #319).

• Fixed a performance issue related to nested unwind_protect() calls (#298).

• Minor performance improvements to the cpp11 protect code. (@kevinushey)

• Silenced an unknown attribute warning specific to the Intel compiler
  (r-lib/systemfonts#98).

• cpp_register() gains an argument extension= governing the file extension of
  the src/cpp11 file. By default it's .cpp, but .cc is now supported
  as well (#292, @MichaelChirico)

cpp11 0.4.3

• Modernized the GitHub Actions workflows and updated some internal tests to
  better align with changes in those workflows and the latest version of R
  (#279).

• cpp_source() errors on non-existent file (#261).

• cpp_register() is quiet by default when R is non interactive (#289).

• updated test to adapt to changes in R 4.2.1 (#290).

cpp11 0.4.2

• Romain François is now the maintainer.

cpp11 0.4.1

• Fix crash related to unwind protect optimization (#244)

cpp11 0.4.0

New Features

• New opt-in message formatting with the {fmt} C++ library for cpp11::messages() cpp11::stop() and cpp11::warning().
  Set the CPP11_USE_FMT macro to use this feature in your package. (@sbearrows, #169, #208)
• New as_double() and as_integer() methods to coerce integers to doubles and doubles to integers to doubles (@sbearrows, #46)
• cpp11::matrix iterators can now be used either row-wise or column-wise (the default) depending on the user's choice (@alyst, #229)

Improvements and fixes

• Read-only matrix accessors are now marked const (#234)
• writable::r_vector default constructors now return a 0 length vector when converted to SEXP (#166)
• Read-only r_vector constructors now disallow implicit construction with named arguments (#237)
• Read-only r_vector.attr() methods now return const objects, so it is a compile time error to try to assign to them (#237)
• Fixed + and += operators of r_vector::[const_]iterator to conform the iterators concept:
  += updates the iterator, and + returns the updated copy, while keeping the original unchanged (@alyst, #231)
• Remove undefined behavior when constructing global cpp11::sexps (#224)
• Removed redundant .Call calls in cpp11.cpp file (@sbearrows, #170)
• Error messages now output original file name rather than the temporary file name (@sbearrows, #194)
• cpp_register() now includes attribute_visible in the init function, so packages compiled with C_VISIBILITY will find the init function.
• Fixed bug when running cpp_source() on the same file more than once (@sbearrows, #202)
• Allow cpp11 decorators of the form cpp11::linking_to (@sbearrows, #193)
• Removed internal instances of cpp11::stop() and replaced with C++ exceptions (@sbearrows, #203)
• Names of named lists are now resized along with the list elements (@sbearrows, #206)

cpp11 0.3.1

• Fix stringop-truncation warning from generated wrapping code.

cpp11 0.3.0

New functions and features

• New x.empty() method to check if a vector is empty (@sbearrows, #182)
• New x.named() method to check if a vector is named (@sbearrows, #186)
• New na() free function to return the NA sentinels for R objects (@sbearrows, #179)

Major fixes

• Memory no longer inadvertently leaks when move constructing vectors (#173)

minor improvements and fixes

• Incorrectly formatted cpp11 decorators now output a more informative error message (@sbearrows, #127)
• Generated registration code now uses C collation to avoid spurious changes from tools::package_native_routine_registration_skeleton() (@sbearrows, #171)
• Makevars files which include filenames now handle spaces in paths properly (@klmr, #160)