https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115923
Bug ID: 115923
Summary: different diagnostic if using qualified name vs not
for missing template arguments
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: enhancement
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: pinskia at gcc dot gnu.org
Target Milestone: ---
Take:
```
template<int> struct extent{};
struct extent t;
struct ::extent t1;
```
GCC currently produces:
```
<source>:4:8: error: template argument required for 'struct extent'
4 | struct extent t;
| ^~~~~~
<source>:5:10: error: invalid use of template-name 'extent' without an argument
list
5 | struct ::extent t1;
| ^~~~~~
<source>:2:22: note: 'template<int <anonymous> > struct extent' declared here
2 | template<int> struct extent{};
| ^~~~~~
```
The error messages are correct but they are different and the qualified name
even gives where the definition was originally defined while the non-qualified
one does not. It would be useful if the non-qualified gives the same error
message and where the original definition was.
