Yukihiro "Matz" Matsumoto 3c68e49178 mruby-regexp: add lookahead assertions (?=...) and (?!...) ...

implement positive and negative lookahead in the backtracking engine:
- (?=pattern): succeeds if pattern matches at current position
  without consuming characters
- (?!pattern): succeeds if pattern does NOT match at current position

new bytecodes RE_LOOKAHEAD and RE_NEG_LOOKAHEAD implemented in
the backtracking engine via nested bt_match calls.

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

2026-04-23 19:25:29 +09:00

..

re_internal.h

mruby-regexp: add lookahead assertions (?=...) and (?!...)

2026-04-23 19:25:29 +09:00