Yukihiro "Matz" Matsumoto 101f8c69a1 mruby-regexp: implement fixed-length lookbehind assertions ...

Add (?<=...) positive and (?<!...) negative lookbehind support.
The sub-pattern must have a fixed byte length (no quantifiers or
alternation), computed at compile time and stored in the instruction.
At execution time, the engine backs up by that many bytes and runs
the sub-pattern forward. Maximum lookbehind length is 255 bytes.

Co-authored-by: Claude <noreply@anthropic.com>

2026-04-23 19:25:32 +09:00

..

regexp.rb

mruby-regexp: implement fixed-length lookbehind assertions

2026-04-23 19:25:32 +09:00