Andreas 'ads' Scherbaum <adsmail@wars-nicht.de> writes:
> The validator function should use the weak mode for itself to return
> 'f' in case of invalid input. It cannot be the users job to make sure a
> validator function is working as expected.
Well the input function is being called before the validator function ever
gets a chance to act. The validator function receives an already-formed isbn13
datum.
Is there an is_valid() which takes text input? Perhaps there should be --
though I think it would have to be isbn_is_valid() or something like that.
-- Gregory Stark EnterpriseDB http://www.enterprisedb.com Ask me about EnterpriseDB's RemoteDBA services!