https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125939
Bug ID: 125939
Summary: [reflection] std::meta::is_copy_constructible_type
result in error for int& in template
Product: gcc
Version: 17.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: chzn at mail dot ustc.edu.cn
Target Milestone: ---
https://godbolt.org/z/66rYfrbGE
```
#include <meta>
template<typename T>
constexpr bool cct = std::meta::is_copy_constructible_type(^^T);
int main() {
using T = int&;
static_assert(std::meta::is_copy_constructible_type(^^T)); // OK
static_assert(cct<int&>); // Error
return 0;
}
```
result in
```
<source>: In instantiation of 'constexpr const bool cct<int&>':
<source>:9:19: required from here
9 | static_assert(cct<int&>); // Error
| ^~~~~~~~~
<source>:4:59: error: 'const' qualifiers cannot be applied to 'int&'
4 | constexpr bool cct = std::meta::is_copy_constructible_type(^^T);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~
```
