[Bug c++/96877] Erroneous warning when default initializing function pointer types defined using std::declval

[insertinterestingnamehere at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96877

--- Comment #4 from Ian Henriksen <insertinterestingnamehere at gmail dot com> 
---
It's worth noting that, with g++

using function_type = void (*)(void*) noexcept;

actually works, but

typedef void(*function_type)(void*) noexcept;

does not. clang++ rejects both though.