PREV_IS_A_LETTER 4128 regex.c        	  if (PREV_IS_A_LETTER(d)) break;
PREV_IS_A_LETTER 4131 regex.c        	if (PREV_IS_A_LETTER(d) != IS_A_LETTER(d))
PREV_IS_A_LETTER 4141 regex.c        	  if (PREV_IS_A_LETTER(d)) goto fail;
PREV_IS_A_LETTER 4144 regex.c        	if (PREV_IS_A_LETTER(d) != IS_A_LETTER(d))
PREV_IS_A_LETTER 4149 regex.c        	if (IS_A_LETTER(d) && (AT_STRINGS_BEG(d) || !PREV_IS_A_LETTER(d)))
PREV_IS_A_LETTER 4154 regex.c        	if (!AT_STRINGS_BEG(d) && PREV_IS_A_LETTER(d)