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

The only thing you cannot do is use the typedef to define the constructor. Other than that, you ought to specialize the A constructor like this:

template<> A::A(int){}

If you want A to have a different constructor than the generic A, you need to specialize the whole A class:

template<> class A {
public:
   A(const string& takethistwentytimes) { cerr << "One Type" << std::endl; }
};