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Re: question regarding new warning


On 03/27/2014 08:44 AM, Andrew Haley wrote:

On 03/26/2014 03:05 PM, Daniel Gutson wrote:

     assigning a negative literal to an unsigned variable issues no warning:


    unsigned int x;
    x =- 4;

This is specially important in typos when -= was intended instead of =-

Would be acceptable if I add a new warning to handle this, i.e.
   -Wnegative-to-unsigned
or alike?

Assigning a negative literal to an unsigned variable is well-defined
standard C.  Is it really appropriate to warn for correct code?

Yes, this warning needs to take whitespace into account. But then, I suppose it would be fine.

--
Florian Weimer / Red Hat Product Security Team


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