nested class in template class

[Gabi]

Hi,

Can somebody help me, that what's the problame with that code?

template <typename T>
class A
{
     class B {};	
	
     B f(void);
};

template<typename T>
A<T>::B A<T>::f(void)
{
}

[jsmith]

B is private in A as you've written it.

[Gabi]

Thx for answer, but it's not about visibility.

If I write it without template :

class A
{
    class B {};
    B f(void);
};


A::B A::f(void)
{
}

It works.

The compiler says:
" teszt.cpp:16: error: expected constructor, destructor, or type conversion before 'A' "

It's something that I don't know how to refer to B when A is template.

[kbw]

To compile that, the compiler must know the constructor, destructor and size of B.

[Gabi]

I found the answer, it should be:

template<typename T>
class A
{
    class B {};
    B f(void);
};

template<typename T>
typename A<T>::B A<T>::f(void)
{
}