Sepplesfags, help!


template <class T>
class A
{
public:
    typedef T Foo;
};

template <class T>
class B
{
    A<T>::Foo foo;
};

int main()
{
    B<int> b;
    return 0;
}


test.cpp:11: error: type ‘A<T>’ is not derived from type ‘B<T>’
test.cpp:11: error: expected ‘;’ before ‘foo’


What the FUCK?

What the fuck is the difference between template <class T> and template <typename T>. If there is no difference, WHY SUPPORT BOTH FOR FUCK'S SHIT?. Backwards compatibility is not good enough an answer.

typename A<T>::Foo foo;
PIG DISGUSTING. A<T>::Foo is already a god damn class. What does the compiler need the typename for?