OBACK_ 166 ext/ereg/regex/debug.c case OBACK_: OBACK_ 287 ext/ereg/regex/engine.c case OBACK_: OBACK_ 525 ext/ereg/regex/engine.c case OBACK_: /* the vilest depths */ OBACK_ 864 ext/ereg/regex/engine.c case OBACK_: /* ignored here */ OBACK_ 507 ext/ereg/regex/regcomp.c EMIT(OBACK_, i);