1{ REG_OKAY, "REG_OKAY", "no errors detected" }, 2{ REG_NOMATCH, "REG_NOMATCH", "failed to match" }, 3{ REG_BADPAT, "REG_BADPAT", "invalid regexp (reg version 0.8)" }, 4{ REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element" }, 5{ REG_ECTYPE, "REG_ECTYPE", "invalid character class" }, 6{ REG_EESCAPE, "REG_EESCAPE", "invalid escape \\ sequence" }, 7{ REG_ESUBREG, "REG_ESUBREG", "invalid backreference number" }, 8{ REG_EBRACK, "REG_EBRACK", "brackets [] not balanced" }, 9{ REG_EPAREN, "REG_EPAREN", "parentheses () not balanced" }, 10{ REG_EBRACE, "REG_EBRACE", "braces {} not balanced" }, 11{ REG_BADBR, "REG_BADBR", "invalid repetition count(s)" }, 12{ REG_ERANGE, "REG_ERANGE", "invalid character range" }, 13{ REG_ESPACE, "REG_ESPACE", "out of memory" }, 14{ REG_BADRPT, "REG_BADRPT", "quantifier operand invalid" }, 15{ REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug" }, 16{ REG_INVARG, "REG_INVARG", "invalid argument to regex function" }, 17{ REG_MIXED, "REG_MIXED", "character widths of regex and string differ" }, 18{ REG_BADOPT, "REG_BADOPT", "invalid embedded option" }, 19{ REG_ETOOBIG, "REG_ETOOBIG", "nfa has too many states" }, 20