implicit-typename2.c

this is a gcc file, you can download it and learn its usetility, for further detail please look at t

// { dg-do compile }

// Origin: Wolfgang Bangerth <[e-mail]>

// PR c++/11039: Implicit typename warning in friend class declaration.

template <typename T> struct X {
  struct Y {
    struct Z {};
  };
  friend struct Y::Z;
};