[Bug c++/8715] '~' operator for unsigned char and conversion to bool

[rearnsha at gcc dot gnu dot org]

------- Comment #9 from rearnsha at gcc dot gnu dot org  2007-01-26 17:03 -------
(In reply to comment #8)
> I meant that the warning is appropriate but
> the message is confusing because it is exposing that when doing 
> 
> bool x = ~b; 
> 
> we actually do 
> 
> bool x = (~b != 0);
> 
Or, more precisely, 
  bool x = (~(int) b) != 0;

> So an appropriate message would say something like:
> 
> test.cpp:5: warning: '(bool) ~b' is always true

> Don't you agree?
> 

Yes, that would be nice, but hard to implement.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=8715