feat: add (?[...]) extended character class support#31
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toddr merged 1 commit intoMar 27, 2026
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Parse extended character classes with set operations (union +,
intersection &, subtraction -, symmetric difference ^, complement !).
Expression content stored as opaque string, consistent with how
(?{code}) blocks are handled. Includes 68 tests covering operators,
nested classes, Unicode properties, round-trip stability, and
embedding in larger patterns.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
atoomic
approved these changes
Mar 27, 2026
toddr
approved these changes
Mar 27, 2026
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What
Add support for parsing
(?[...])extended character class syntax introduced in Perl 5.18.Why
This was the last significant modern Perl regex feature missing from the parser. Extended character classes enable set operations (union, intersection, subtraction, complement) on character classes — widely used in Unicode-aware code. Without this, the parser would choke on any regex containing
(?[...]).How
(?[handler in Handlers.pm that matches balanced content (handling nested[...],(...),\escapes, and#comments)charclass_exprobject type in Objects.pm — a leaf node storing the expression content as an opaque string, consistent with how(?{code})blocks are handledTesting
t/17extcharclass.tcovering:+,&,-,^,!🤖 Generated with Claude Code