On Thu, May 1, 2014 at 4:34 PM, Al Viro <viro@xxxxxxxxxxxxxxxxxx> wrote:
> On Thu, May 01, 2014 at 11:42:52AM +0200, Miklos Szeredi wrote:
>> - "bool foo = flag & FLAG" looks suspicious. Is this guaranteed not to
>> overflow?
>
> What do you mean, overflow? It's not a 1-bit unsigned int; conversion to
> _Bool is different (which is the only reason why it's more than mere
> syntax sugar). See C99 6.3.2.1 ("When any scalar value is converted
> to _Bool, the result is 0 if the value compares equal to 0; otherwise,
> the result is 1").
Ah, didn't know that.
Thanks,
Miklos
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