Please be aware that you will see an oversimplified version of the code here. So it might look useless. However, that is not the problem.

The problem is that I have a primary template class like this:

// The primary template class
template<int N>
struct Start {
  int start;

  template<typename... Args>
  int operator()(Args... args) const {return start;}
};

When I specialize this class template:

// Specialization for N=1:
template<>
struct Start<1> {
  int operator()(int i) const {return start;}
};

I get the following error:

error: ‘start’ was not declared in this scope
int operator()(int i) const {return start;}

Why is start not declared in the scope of class Start<1>?

Question

• Why does the specialized class not recognize the member of the primary class?

I appreciate any suggestions.