ttp56.c

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

// Build don't link:

// by Paul Burchard <[e-mail]>, Level Set Systems, Inc.
// Copyright (C) 1999 Free Software Foundation

template<class X>
class A {
};
template<class Y>
class B {
};

template<template<class XX> class AA> // gets bogus error - `template <class XX> template <class X> class A<X>' previously declared here
class C {
	class D {
	};
	D d;
	class E : public B<D> {
	};
	E e;
};

int main() {
	C<A> c; // gets bogus error - redefinition of `template <class XX> template <class X> class A<X>'
}