gcc/testsuite/g++.dg/warn/implicit-typename2.C

// { dg-do compile }

// Origin: Wolfgang Bangerth <bangerth@ticam.utexas.edu>

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

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