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Releases: foonathan/lexy

Release 2022.12.1

04 Jan 11:19
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  • Add constructor to lexy::input_location.
  • lexy::error_context::production will not be a transparent production.
  • Fix lexy::production_info::operator== when the compiler doesn't merge string literals.
  • Fix SWAR matching of dsl::ascii::print and dsl::ascii::graph.
  • Fix CMake target installation (#108).

New Contributors

Full Changelog: v2022.12.0...v2022.12.1

Release 2022.12.0

07 Dec 10:09
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Headline: Unicode 15 support, ability to split a grammar into multiple translation units using lexy::dsl::subgrammar, and significant performance improvements.

Potential breaking changes

  • Change [lexy::dsl::peek_not() error recovery behavior:
    it will now consume the input it matched to recover, which is more useful.
  • Remove Production parameter from lexy::error_context.
    It is replaced by a type-erased lexy::production_info.
  • lexy::validate, lexy::parse, and lexy::parse_as_tree now type-erase generic error tags prior to invoking the callback.
  • Use type-erased lexy::production_info instead of Production type in lexy::parse_tree.
    This is technically a breaking change, as it may affect overload resolution.

New features

  • Update Unicode database to Unicode 15.
  • Use SWAR (SIMD within a register) techniques to optimize token parsing.
  • Add lexy::dsl::subgrammar to split a grammar into multiple translation units.
  • Add lexy::dsl::flags and lexy::dsl::flag to parse enum flags.
  • Add overload of lexy::dsl::position that parses a rule.
    This allows using it as branch conditions.
  • Add lexy::dsl::effect to trigger side-effects during parsing.
  • Add lexy::subexpression_production to parse a subexpression.
  • Add lexy::utf8_char_encoding.
  • Add lexy::parse_tree::remaining_input() and populate it by lexy::parse_as_tree.
  • Add lexy::make_buffer_from_input function.
  • Add type-erased version of lexy::error.
  • Support non-const parse state.

Bugfixes

  • Fix bug where lexy::bind callback does not forward rvalue arguments; they got turned into lvalues instead.
  • Fix bug where callback composition was not allowed if the final callback returns void.
  • Fix bug where dsl::quoted(cc.error<foo>) did not use foo as the error.

New Contributors

Full Changelog: v2022.05.1...v2022.12.0

Release 2022.05.1

13 Jul 11:07
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  • Change dsl::scan: it will now be invoked with the previously produced values.
  • Add dsl::parse_as to ensure that a rule always produces a value (e.g. when combined with the dsl::scan change above).
  • Add lexy::lexeme_input to support multi-pass parsing.
  • Turn dsl::terminator(term)(branch) into a branch rule, as opposed to being a plain rule (#74).
  • Add dsl::ignore_trailing_sep() separator.
  • Add lexy::bounded<T, Max> for bounded integer parsing (#72).
  • Add dsl::code_unit_id rule.
  • Turn lexy::forward<void> into a sink.
  • Support references in lexy::parse_result and lexy::scan_result
  • Fix bug that prevented lexy::parse with a root production whose value is void.
  • Fix bug that caused infinite template instantiations for recursive scans.
  • Fix bug that didn't skip whitespace in lexy::scanner for token productions.

Release 2022.05.0-beta

03 May 14:44
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Pre-release

Initial release.