On Apr 29, 2011, at 11:46 AM, Basile Starynkevitch wrote:
> On Fri, 29 Apr 2011 11:08:24 -0400 (EDT)
> [email protected] (Diego Novillo) wrote:
>
>> This patch from Le-Chun Wu adds support to check whether a nonnull
>> attribute is applied to 'this' pointer for non-static methods.
>
> This bring me to a question. Does the C++ standard imply that this is
> never a null pointer?
Does this:
4 Certain other operations are described in this International Standard
as undefined (for example, the effect of dereferencing the null
pointer). [Note: this International Standard imposes no requirements
on the behavior of programs that contain undefined behavior. ]
answer your question? Note, this is exactly the same as C. You can't do it in
C either:
struct A {
int x;
} *pa = 0;
int main() {
pa->x = 1;
}
If you run it, it will crash on all good OSes. In C++, it will also crash.
