template<class T>
class A {
  T x;
public:
  class B {
  public:
    T y;
  };

  B f();
};

template<class T>
A<T>::B A<T>::f() {
  return B();
}

int main() {
  A<int> a;
  return 0;
}


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test.cpp:26: error: expected constructor, destructor, or type conversion before "A"