https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126654
Bug ID: 126654
Summary: error: '::' is not a class, namespace, or enumeration
Product: gcc
Version: 17.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: eczbek.void at gmail dot com
Target Milestone: ---
https://godbolt.org/z/1Tcz9sMes
```
struct S {};
template<auto ns>
void f() {
using [:ns:]::S;
}
int main() {
f<^^::>();
}
```
```
<source>: In instantiation of 'void f() [with auto ns = ^^::]':
<source>:9:9: required from here
9 | f<^^::>();
| ~~~~~~~^~
<source>:5:23: error: '::' is not a class, namespace, or enumeration
5 | using [:ns:]::S;
| ^
```
