Bug#341345: gcc-4.0: Please warn on impossible && conditionals

[Justin Pryzby <justinpryzby@users.sourceforge.net>]

On Wed, Nov 30, 2005 at 01:26:50PM +0800, Paul Harris wrote:

> I would imagine this below:
> 
> >
> >  if (0==c && 1==c)
> 
> isn't a good idea, because it would break symmetry with custom 
> operator==() behaviour.
Okay, I'm no CPP guy though :)

Is it a problem to warn in C, only?  I know little about the design of
gcc, but it seems that this would be useful and should be possible.
Maybe limit the warning to arithmetic types only?

-- 
Clear skies,
Justin