PREV_WORD_CONSTRAINT  196 lib/regex_internal.h #define PREV_WORD_CONSTRAINT 0x0001
PREV_WORD_CONSTRAINT  209 lib/regex_internal.h INSIDE_WORD = PREV_WORD_CONSTRAINT | NEXT_WORD_CONSTRAINT,
PREV_WORD_CONSTRAINT  211 lib/regex_internal.h WORD_LAST = PREV_WORD_CONSTRAINT | NEXT_NOTWORD_CONSTRAINT,