https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102175
Bug ID: 102175
Summary: Error comparing the pointers on static class fields in
static_assert
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: fchelnokov at gmail dot com
Target Milestone: ---
This code:
```
template<int N> struct C {
static int x;
};
template<int N> int C<N>::x = 0;
int main() {
static_assert(&C<0>::x != &C<1>::x);
}
```
produces an error in GCC: "non-constant condition for static assertion", but
accepted in other compilers. Demo: https://gcc.godbolt.org/z/o6dE3GaMK
A similar code without templates is accepted by GCC:
```
struct C { static int x; };
int C::x = 0;
struct D { static int x; };
int D::x = 0;
int main() { static_assert( &D::x != &C::x ); }
```
