[Bug libstdc++/50268] [C++0x] bitset doesn't sanitize input

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50268

--- Comment #14 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-09-02 
12:33:40 UTC ---
(In reply to comment #13)
> Doesn't _Base_bitset<1> also need a special case for
> _Nb==_GLIBCXX_BITSET_BITS_PER_WORD ?

You are right, got confused by the signedness.

> I think we could express the constant as
> ~static_cast<_WordT>(0)>>(_GLIBCXX_BITSET_BITS_PER_WORD-_Nb) so we don't need 
> a
> special case (and something similar for the last word of the generic
> _Base_bitset)

Let's see what I can do, thanks.