Hi,
On Mon, Aug 20, 2018 at 10:05:57AM +0200, Vincent Lefevre wrote:
> On 2018-08-18 14:19:10 -0500, Segher Boessenkool wrote:
> > Usually cast between a pointer type and a different size integer type
> > is a programmer mistake. That is why this warning is enabled by -Wall.
>
> I don't see why. In doubt, one should be able to choose the largest
> integer type available. Note also that the C standard does not say
> that an integer type of the same size as the pointer is sufficient.
In the infrequent case where you do want to cast a pointer to an integer
and back, you should use uintptr_t. It's what it is there for!
("But it is optional!" It is required by susv3, most systems have it).
> > Do you have evidence of many false positives?
>
> False positives when casting to uintmax_t.
That's not what I asked: do people actually see many false positives?
If that was true, bugzilla should be filled with it by now.
Segher
