--On Freitag, März 06, 2009 11:32:14 +0100 Andreas 'ads' Scherbaum
<adsm...@wars-nicht.de> wrote:
No.
Straight from the source:
-- isn_weak(boolean) - Sets the weak input mode.
-- This function is intended for testing use only!
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.
I don't see anything that's not already documented. is_valid() checks the
presence of the invalid (!) marker only. It looks like the author never
intended is_valid() to be a "check wether this ISBN is semantically
correct", this is done by the input routines before.
I agree that the naming is a little bit misleading.
--
Thanks
Bernd
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