p4raw-id: //depot/perl@12834
Character classes ([:foo:]) can also be negated ([:^foo:]).
Returns a named class id (ANYOF_XXX) if successful, -1 otherwise.
Equivalence classes ([=foo=]) and composites ([.foo.]) are parsed,
- but trigger warnings because they are currently unimplemented. */
+ but trigger failures because they are currently unimplemented. */
STATIC I32
S_regpposixcc(pTHX_ RExC_state_t *pRExC_state, I32 value)
{