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.

PEGTL 2.5.1

• Added new convenience rule opt_must.
• Optimised convenience rule if_must.
• Fixed examples to compile with Visual Studio and MinGW.
• Added automated testing with GCC 8.