[Bug libstdc++/11740] ctype<wchar_t>::do_is(mask, wchar_t) doesn't handle multiple bits in mask.

[peturr02 at ru dot is]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11740



------- Additional Comments From peturr02 at ru dot is  2003-10-06 19:03 -------
Paolo Carlini wrote:
> This is the rationale: a character *cannot* belong simultaneously to
> two different values of the ctype_base enum:

It can, for example alpha and upper.

> That's why do_is must be intended to mean "any".

The only use for this feature that I see is to be able to use
alnum and graph. ct.is(alnum, c) should return true if c if either
ct.is(digit, c) is true or ct.is(alpha, c) is true. I can't think of
any character for which both are true.