ONIGENC_IS_ALLOWED_REVERSE_MATCH 5291 regcomp.c      	ONIGENC_IS_ALLOWED_REVERSE_MATCH(reg->enc, reg->exact, reg->exact_end);
ONIGENC_IS_ALLOWED_REVERSE_MATCH 6882 string.c       	     ONIGENC_IS_ALLOWED_REVERSE_MATCH(enc, (const unsigned char *)ptstr, (const unsigned char *)ptstr+1)) &&