OP_SCOND (reference) in projects: external

262     case OP_SCOND:

391 OP_SCOND for one that might match an empty string in an unbounded repeat. If

903     case OP_SCOND:  in match()
1112       if (op == OP_SCOND)        /* Possibly empty group */  in match()

/external/pcre/
D	pcre_study.c	`101 case OP_SCOND: in find_minlength()`
D	pcre_printint.src	`262 case OP_SCOND:`
D	pcre_internal.h	`1418 OP_SCOND, /* 99 Conditional group, check empty */ enumerator`
D	HACKING	`391 OP_SCOND for one that might match an empty string in an unbounded repeat. If`
D	pcre_dfa_exec.c	`2459 case OP_SCOND: in internal_dfa_exec()`
D	pcre_exec.c	`903 case OP_SCOND: in match() 1112 if (op == OP_SCOND) /* Possibly empty group */ in match()`