REG_ECOLLATE
case REG_ECOLLATE:
(void) REQUIRE(EATTWO('.', ']'), REG_ECOLLATE);
SETERROR(REG_ECOLLATE); /* neither */
(void) REQUIRE(c != '-' && c != ']', REG_ECOLLATE);
(void) REQUIRE(EATTWO('=', ']'), REG_ECOLLATE);
RERR(REG_ECOLLATE, "invalid collating element"),
REG_ECOLLATE, "ECOLLATE",