casting Class<typename> to Class<const typename>

[wigga]

hello i am having the follow problem.

template<typename T>
struct A
{
private:
T* t;
};

template<typename T>
struct B
{
inline A<T>& GetA()
{
    return a;
}

inline A<const T>& GetA() const  // <<<<<<<<
{
    return a; // <<<<<<<<<<
}
private:
A<T> a;
};

the problem is obviously that there is no cunstructor in A<const T> to accept A<T>.
i have been brain cracking how to to create the constructor solution.
I was thinking i might as well make a public instead of private.
Any help please?

[Kheun]

Is this what you are looking for?

inline const A1<T>& GetA() const  // <<<<<<<<
{
    return a; // <<<<<<<<<<
}

[wigga]

no im talking about constructing a A<const T> from A<T>,.

where did u get the "A1" class from.. there isnt any in my code..

[JVene]

I don't think you can.

You can get a const A<T> from an A<T>, but not a A<const T> from a A<T>

That's just the way templates are.

However....

What you could do is provide a way to cast a T to a const T to construct a new A<const T> using a T, but not a A<T>.