2009/5/11 RT Mistler <[email protected]>:
> Hi,
>
> I've been looking at some kernel modules trying to map an embedded
> devices resources and while going through a driver, I encountered an
> "if" test that employed "!!", example:
>
> if !!function_foo(args) {
> ...
> }
>
> What does the "!!" do? (I'm familiar with a single "!")
Another use of !! is like this:
Node *left, *right;
int childCount() {
return !!left + !!right;
}
Regards
Martin
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