C++ template specialization of constructor

Question

I have a templated class A and two typedefs A and A. How do I override the constructor for A ? The following does not wor

Answer 1

You can't with your current approach. one_type is an alias to a particular template specialization, so it gets whatever code the template has.

If you want to add code specific to one_type, you have to declare it as a subclass of A specialization, like this:

  class one_type:
    public A
  {
    one_type(int m)
      : A(m)
    {
      cerr << "One type" << endl;
    }
  };