https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108486
Bug ID: 108486
Summary: explicit specialization of alias templates error
message should be improved
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Keywords: diagnostic
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: pinskia at gcc dot gnu.org
Target Milestone: ---
Take:
```
template<int t>
struct myinternal_int;
template<int t> using myinttype = myinternal_int<t>;
template<> using myinttype<32> = unsigned int;
```
GCC gives:
```
<source>:4:12: error: expected unqualified-id before 'using'
4 | template<> using myinttype<32> = unsigned int;
| ^~~~~
```
Which is correct though not very useful for an user.
clang gives a much better error message:
```
<source>:4:1: error: explicit specialization of alias templates is not
permitted
template<> using myinttype<32> = unsigned int;
^~~~~~~~~~
```
