Potential breaking changes

• scanner-common::capture_token was renamed to scanner-common::capture, and old scanner-common::capture removed.
  Previously, capture_token was a linker error anyway, but if you're calling scanner-common::capture it will no longer work for arbitrary rules and instead only like dsl::capture.
• lexy::parse_as_tree will add a position token to production nodes that would otherwise be empty.
  That way, no production node will be empty, unless the builder API is used directly.
• Change lexy::dsl::try_() error recovery behavior:
  It will now skip whitespace after the (optional) error recovery rule.
• Deprecate the lexy::parse_tree::builder::finish() overload that does not take a remaining_input.
• The typo lexy::code_point::spaing_mark was fixed to spacing_mark.

New Features

• Experimental: Add lexy::parse_tree_input and lexy::dsl::tnode/lexy::dsl::pnode to support multi-pass parsing.
• Add lexy::dsl::byte.if_/set/range/ascii methods to match specific bytes.
• Add an overload of fatal_error() on scanners that allows construction of type-erased generic errors (#134).
• Add lexy::buffer::release() and lexy::buffer::adopt() to deconstruct a buffer into its components and re-assemble it later.
• Add lexy::parse_tree::node::position() and ::covering_lexeme().
• Add default argument to lexy::dsl::flag().
• Add lexy::callback_with_state.
• Pass the parse state to the tag of lexy::dsl::op if required (#172) and to lexy::dsl::error (#211).
• Enable CMake install rule for subdirectory builds (#205).

Bug fixes

• Add missing constexpr to container callbacks and lexy::as_string.
• Fix infinite loop in dsl::delimited when dealing with invalid code points (#173).
• Fix swallowed errors from case-folding rules (#149).
• Fix lexy::production_name for productions in an anonymous namespace.
• Fix bugs in dsl::scan (#133, #135, #142, #154, #209).
• Fix bug with the position passed to the tag constructor of lexy::dsl::op (#170).
• Fix bug where lexy_ext::report_error unconditionally wrote to stderr, ignoring the output iterator.
• Fix bug with missing lexy::error_context::position in lexy::parse_as_tree (#184).
• Fix static_assert in lexy::parse_tree (#190).
• Fix bugs in lexy::input_location::operator< (#228).
• Fix bugs in examples (#183)
• Add missing && in lexy::bind_sink (#221).
• Workaround compiler bugs and improve documentation (#128, #129, #146, #181, #197, #216, #227).

New Contributors

• @jgopel made their first contribution in #128
• @NelsonEloi made their first contribution in #129
• @nickelpro made their first contribution in #134
• @jan-kelemen made their first contribution in #146
• @shohirose made their first contribution in #181
• @MarcusVoelker made their first contribution in #182
• @klao made their first contribution in #183
• @stotiks made their first contribution in #197
• @TheServer201 made their first contribution in #227
• @Spartan322 made their first contribution in #228

Full Changelog: v2022.12.1...v2025.05.0