v0.3.0

What's Changed

• Added list repetition operator e1 >> e2 to the DSL that is shorthand for e1 > *(e2 > e1).
• Added support for parsing characters and character literals where applicable without explicitly needing to wrap them with chr() or _cx.
• Symbols now respects caseless mode, allowing for case-insensitive matching against symbol definitions.
• Allow for use of variables of all types in attribute bindings and removed the lug::variable template class that was used previously. Variable state is automatically saved and restored across rule boundaries.
• Allow for capturing text to a lug::syntax object or any string-like object that is convertible from std::string_view, and renamed syntax::capture to syntax::str in order to match std::sub_match::str.
• Added lug::source_options::interactive flag that ignores eoi tokens for TTY input sources.
• Rewrote the expression function objects/lambdas as expression template classes. Allows for multiple passes over the expression tree as well as top-down and bottom-up traversal, which was needed when implementing attribute state tracking. This will also allow for additional optimizations to be implemented in the future.
• Renamed syntactic_capture to semantic_capture_action to reflect that it is executed during the semantic action evaluation phase.
• Make all variations of callables that return a non-void value that can be type-erased by semantic_action and semantic_capture_action push their result onto the attribute result stack.
• Removed semantic_response from the public API as it was only used internally inside of the parser.
• Attempting to bind a variable to a nonexistent value from the attribute result stack now throws an attribute_stack_error.
• implicit_space_rule no longer causes a compiler warning with Clang, uses RAII to push/pop the thread-local white space rule for grammars.
• Moved call_depth(), prune_depth() and escape() functions into the lug::environment class since they are used exclusively during semantic action phase.
• Moved line/column tracking and current match/subject string views to lug::environment class, fully removing the environment's dependency on lug::parser.
• Turned lug::parser into an alias of a new lug::basic_parser template class parameterized with an input source strategy. This allows for parsing and capturing of text without making a copy of the input.
• Placed all DSL operator overloads inside of an inline namespace operators within lug::language. This allows only the operators to be imported into the current scope if desired.
• Enabled -Wconversion and -Wshadow warnings for Clang and GCC and fixed warnings.
• Full clang-tidy pass on all of the library headers and fixed all warnings.
• Added CMake build support and removed old MSVS solution and vcxproj files.
• Handle situation where compilation with RTTI is disabled.

Full Changelog: v0.2.0...v0.3.0