[Bug libstdc++/78361] [7 regression][c++1z] std::__is_referenceable doesn't handle noexcept function types

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78361

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |redi at gcc dot gnu.org

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Or to demonstrate the regression, this is valid but fails with gcc7 in C++17
mode:

#include <type_traits>
using std::is_same;
using std::add_pointer;
void f() noexcept { }
static_assert(is_same<add_pointer<decltype(f)>::type, decltype(&f)>::value,
"");