typename4.c

gcc-you can use this code to learn something about gcc, and inquire further into linux,

// Build don't link:
// Special g++ Options: -Wno-deprecated

template <class T>
struct A
{
  typedef T A_Type;
};


template <class U>
struct B : public A<U>
{
};


template <class U>
struct C : public B<U>
{
  A_Type Func(); // WARNING - implicit typename
};


template <class U>
C<U>::A_Type C<U>::Func() { // WARNING - implicit typename
}