Whats the deal with 'const'?

[Chris Torek]

(I was hoping someone else would answer this... no luck )

Although the below code is definitely poor style, is any rule actually
violated?

void f(const int *restrict p) {
*(int *) p = 0;
}
int main(void) {
int i = 1;
f(&i);
return i;
}

I think the answer to your question is "no", but I do not really
fully understand C99's "restrict".

Note that in this case, the compiler can "see" that *p is changed,
despite the "const". In my earlier example, the compiler cannot
(at least locally) see that *p is changed, even though p is declard
using "const char *p", so the compiler has to assume that the
"const" still means "changes after every subroutine call".