[Bug c++/81678] Variadic template parameters containing pointer to member function fail to be parsed unless name of the parameter is specified

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81678

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
clang gives a warning now:
<source>:2:22: warning: ISO C++11 requires a parenthesized pack declaration to
have a name [-Wanonymous-pack-parens]
void f (void (T::*...)())
                     ^

So maybe GCC is correct, clang just has an extension.