[Bug c++/115809] Gcc can't parse code where the decltype is written, which depends on the runtime arguments passed to the function.

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115809

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |rejects-valid
             Status|UNCONFIRMED                 |NEW
      Known to fail|                            |4.7.4
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2024-07-06

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
here is the C++11 version to show this is not a regression and has been failing
since at least 4.7.4:
```
template <int...>
void Foo() {};

template<typename ...T>
void Foo2(T... is) {
  return Foo<is...>(); // works fine
};
template<typename ...T>
auto Foo3(T... is) -> decltype(Foo<is...>()) {};

```