[Bug c++/71653] error when trying to compile a code with template friend function in a struct

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71653

Andrew Pinski  changed:

   What|Removed |Added

   Keywords||rejects-valid

--- Comment #4 from Andrew Pinski  ---
If I don't use an alias template in the original declaration of f it works:
template  using C = typename T::InnerType;
template  typename T::InnerType f(T &);
class S {
using InnerType = int;
template  friend C f(T &);
};
int main()
{
S s;
f(s);
return 0;
}

[Bug c++/71653] error when trying to compile a code with template friend function in a struct

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71653

Andrew Pinski  changed:

   What|Removed |Added

 Status|UNCONFIRMED |NEW
 Ever confirmed|0   |1
   Last reconfirmed||2021-08-05

--- Comment #3 from Andrew Pinski  ---
Reduced testcase without includes:
template  using C = typename T::InnerType;
template  C f(T &);
class S {
using InnerType = int;
template  friend C f(T &);
};
int main()
{
S s;
f(s);
return 0;
}

[Bug c++/71653] error when trying to compile a code with template friend function in a struct

[raphael.rg91 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71653

--- Comment #2 from Raphael Gozzo  ---
This error happens in the 6.1 version too (tested here http://gcc.godbolt.org)

[Bug c++/71653] error when trying to compile a code with template friend function in a struct

[raphael.rg91 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71653

--- Comment #1 from Raphael Gozzo  ---
Created attachment 38765
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38765=edit
source file