Issues

• x4::unique_symbols must be able to hold all the content on constexpr variable

  enhancement
  iris-cpp/x4#118 · Filter by author saki7 opened on Oct 5, 2026

• Semantic action attached to a parser that has attribute type of unused_type shall not inhibit the outer rule's attribute composition

  enhancementtests needed
  iris-cpp/x4#104 · Filter by author saki7 opened on Sep 15, 2026

• Auto-inhibition of the attribute is too inconvenient on trivial semantic actions

  enhancement
  iris-cpp/x4#100 · Filter by author saki7 opened on Sep 13, 2026

• eol_or_eoi is needed

  enhancement
  iris-cpp/x4#99 · Filter by author saki7 opened on Sep 13, 2026

• X4 should provide builtin semantic actions

  documentationenhancement
  iris-cpp/x4#98 · Filter by author saki7 opened on Sep 13, 2026

• lexeme should accept an arbitrary skipper as its argument

  enhancement
  iris-cpp/x4#97 · Filter by author saki7 opened on Sep 13, 2026

• x4::char_set must be capable of propagating the constexpr-initialized variable to runtime

  enhancementtests needed
  iris-cpp/x4#95 · Filter by author saki7 opened on Sep 9, 2026

• Some mechanism is needed for yielding expectation failure in semantic action

  enhancement
  iris-cpp/x4#75 · Filter by author saki7 opened on Mar 12, 2026

• Diagnostics needed for the silently omitted non-unused attribute on the delimiter of delimited_list parser (%)

  tests needed
  iris-cpp/x4#70 · Filter by author saki7 opened on Mar 5, 2026
  1

• Mixing operator >> and > considered harmful on the semantics of the combined parser tree

  enhancement
  iris-cpp/x4#60 · Filter by author saki7 opened on Mar 2, 2026
  1

• Mixing non-unused and unused parsers in a parent parser with a non-unused exposed attribute leads to incomplete parse result at runtime

  enhancement
  iris-cpp/x4#48 · Filter by author saki7 opened on Feb 20, 2026
  3

• Implement packrat-style global cache

  enhancement
  iris-cpp/x4#44 · Filter by author saki7 opened on Feb 18, 2026