What's the best way to do "string-memq"?

[Alan Mackenzie]

Hi, everybody,

I need a predicate which I'd ideally like to write as

    (string-memq (char-after) skip-chars)

, where skip-chars is a string like "^;{}?:", and the predicate should
return t when (char-after) is one of (?^ ?\; ?\{ ?\} ?\? ?\:).

I can't see a convenient way to code this (no, I haven't looked into CL,
and don't want to).  Isn't there some elisp function something like
C's strchr?  Or must I dissect the string into its component characters
for a memq, or (almost as bad), regexp-quote the character from the
buffer and do `string-match' with that?

-- 
Alan Mackenzie (Nuremberg, Germany).