https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109623
Bug ID: 109623
Summary: constexpr restrictions are not relaxed enough
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: oleksandr.koval.dev at gmail dot com
Target Milestone: ---
https://godbolt.org/z/eo8K3Ehqq
```cpp
#include <unordered_map>
struct S{
constexpr S() = default; // error, not implicitly constexpr
constexpr S(){} // this works
std::unordered_map<int, int> m;
};
```
My understanding is that in C++23 this should be allowed because the only
restriction for constexpr constructors and destructors is the absence of
virtual base classes.
