prevb            1723 src/regexp.c       unsigned char nextb, prevb;
prevb            1730 src/regexp.c       prevb = (unsigned char)*prevp;
prevb            1731 src/regexp.c       if ((is_word_constituent(nextb) && !is_word_constituent(prevb))
prevb            1732 src/regexp.c           || (!is_word_constituent(nextb) && is_word_constituent(prevb))) {