OP_WORD_BEGIN    1497 regcomp.c          else                      r = add_opcode(reg, OP_WORD_BEGIN);
OP_WORD_BEGIN    6184 regcomp.c        { OP_WORD_BEGIN,          "word-begin",      ARG_NON },
OP_WORD_BEGIN    2328 regexec.c          CASE(OP_WORD_BEGIN)  MOP_IN(OP_WORD_BEGIN);