PEGTL 3.0.0

• Use the migration guide when updating.
• Infrastructure
  • Updated required C++ standard to C++17.
  • Updated required CMake version to 3.8.
  • The macro TAO_PEGTL_NAMESPACE now contains the fully qualified namespace, e.g. tao::pegtl.
  • Added [[nodiscard]] or [[noreturn]] to most non-void functions.
• Meta-Data Layer
  • Replaced analysis_t with more general and complete rule_t and subs_t.
  • Added functions to visit all rules of a grammar.
  • Added functions to measure rule coverage of a parsing run.
  • Moved the analysis function and header to contrib.
• Error Handling
  • Replaced tao::pegtl::input_error with std::system_error and std::filesystem::filesystem_error.
  • Added must_if<>
    • Allows to define custom error messages for global errors.
    • Adds a non-intrusive way to define global parse errors for a grammar retroactively.
• Demangling
  • Removed the need for RTTI.
    • Some broken/unknown compilers will use RTTI as a fallback, without demangling.
  • Moved tao::pegtl::internal::demangle<T>() to tao::demangle<T>().
  • Improved generated code to be shorter and more efficient.
• Parse Tree
  • Removed the need for RTTI.
• Other
  • Changed std::string to std::filesystem::path for filename parameters.
  • Renamed byte_in_line to column and use 1-based counting.
  • Moved rule eolf from inline namespace tao::pegtl::ascii to tao::pegtl.
  • Changed rules in tao/pegtl/contrib/integer.hpp to not accept redundant leading zeros.
  • Added rules to tao/pegtl/contrib/integer.hpp that test unsigned values against a maximum.
  • Demoted UTF-16 and UTF-32 support to contrib.
  • Demoted UINT-8, UINT-16, UINT-32 and UINT-64 support to contrib.
  • Folded contrib/counter.hpp into json_count.cpp, count is superceded by coverage.
  • Removed right padding from contrib/json.hpp's value.
• Cleanup
  • Removed option of state's S::success() to have an extended signature to get access to the current apply_mode, rewind_mode, action- and control class (template).
  • Removed compatibility macros starting with TAOCPP_PEGTL_.
  • Removed compatibility uppercase enumerators.
  • Removed compatibility peek_byte() member functions.
  • Removed compatibility header changes.hpp from contrib.

PEGTL 2.8.3

• Fixed excessive read-ahead with incremental inputs.
• Added state manipulators remove_first_state, remove_last_states, rotate_states_right, rotate_states_left, and reverse_states to contrib.
• Reduced the number of intermediate parse tree nodes.

PEGTL 2.8.2

• Fixed parse tree node generation to correctly remove intermediate nodes.

PEGTL 2.8.1

• Added fallback symbol demangling if RTTI is disabled.
• Fixed missing string_input<> in amalgamated header.
• Fixed discard_input* actions to properly forward the apply mode.
• Fixed contrib HTTP grammar for chunked data.

PEGTL 2.8.0

• Use the migration guide when updating.
• Changed enumerators to lowercase.
  • Renamed tracking_mode::IMMEDIATE to tracking_mode::eager.
  • Compatibility enumerators with uppercase names are still included.
    • Will be removed in version 3.0.0.
• Renamed peek_byte() to peek_uint8().
  • Compatibility member functions with previous names are still included.
    • Will be removed in version 3.0.0.
• Allowed actions to implement match.
• Made deriving action class templates from nothing optional.
• Added debug tools require_apply and require_apply0.
• Added combinator class rematch.
• Improved the Parse Tree / AST interface to mostly hide its internal state.
• Added new action-based helpers change_*.hpp.
  • The control-based helpers in contrib/changes.hpp are still included.
    • Will be removed in version 3.0.0.
• Added new action-based helpers disable_action.hpp and enable_action.hpp.
• Added new action-based helpers discard_input.hpp, discard_input_on_success.hpp, and discard_input_on_failure.hpp.
• Added Clang Static Analyzer to the CI build.
• Added new Makefile target amalgamate to generate a single-header version of the PEGTL.
• Added support for Universal Windows Platform (UWP).

PEGTL 2.7.1

• Added new ASCII convenience rule forty_two.
• Added experimental if_then rule.
• Simplified how parse tree nodes can be selected.
• Reduced the number of intermediate parse tree nodes.
• Allowed an action class template to be used with the parse tree.

PEGTL 2.7.0

• Added mmap_file<> support for Windows.
• Added deduction guides for the input classes when compiling with C++17.

PEGTL 2.6.1

• Fixed endianness detection in test program.

PEGTL 2.6.0

• Added Conan packages.
• Fixed the UTF-8 decoder to no longer accept UTF-16 surrogates.
• Fixed the UTF-16 decoder to no longer accept UTF-16 unmatched surrogates.
• Fixed the UTF-32 "decoder" to no longer accept UTF-16 surrogates.
• Fixed pegtl/contrib/unescape.hh to no longer accept unmatched surrogates.
• Optimised convenience rule two.
• Added new convenience rule three.

PEGTL 2.5.2

• Fixed opt and until to work as documented in some rare edge cases.
• Used opt_must and star_must to optimise some included grammars.