REG_BADRPT
(void)REQUIRE(bc->nchain == 0, REG_BADRPT);
SETERROR(REG_BADRPT);
(isdigit((uch)PEEK2()) || PEEK2() == ','), REG_BADRPT);
(void)REQUIRE(!wascaret, REG_BADRPT);
SETERROR(REG_BADRPT);
SETERROR(REG_BADRPT);
{REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid"},