具有静态类成员的C ++模板类

Question

I am new to template programming. I have a vector class that I am attempting to template that contains static members of the same class as the parent:

template<typename T>
class Vector
{
   // vector stuff

   static const Vector c_NullVector;
}

I am attempting to initialize this static member but can only achieve success if I explicitly state the type, eg:

const Vector2d<float> Vector2d<float>::c_Zero(0.0);

I would rather not have to initialize each type if possible. Is this even possible?

Answer 1

You must provide a definition as follows:

template<typename T>
class Vector
{
   // vector stuff

   static const Vector c_NullVector;
}

template <typename T>
const Vector<T> Vector<T>::c_NullVector;

If you can come up with a generic initialisation, you can put it in the definition.

Answer 2

I doubt, that's possible. What about Vector<MyVeryComplicatedClass> ? How would you know how to initialize it?