How to specialize only some members of a template class?

Question

Code:

template
struct A {
  void f1() {};
  void f2() {};

};

template<>
struct A {
  void f2() {};
};


int main() {
  A<         


        

Answer 1

Consider moving common parts to a base class:

template 
struct ABase
{
    void f1();
};


template 
struct A : ABase
{
    void f2();
}  


template <>
struct A : ABase
{
    void f2();
};

You can even override f1 in the derived class. If you want to do something more fancy (including being able to call f2 from f1 code in the base class), look at the CRTP.