(REGEX_FREE_STACK, RESET_FAIL_STACK): Make them usable as an expression.
(enum re_opcode_t): Update description of succeed_n. (PATFETCH): Always define. (regex_compile): Use lookahead rather than PATUNFETCH (for repetition operators, char classes, shy-groups and intervals). Optimize special cases of intervals so as to only use succeed_n and jump_n when really needed. (re_compile_fastmap): Simplify handling of jump_n and succeed_n now that we don't have to handle the special cases any more. Simplify on_failure_jump handling as well.
Showing with 118 additions and 123 deletions