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

Assuming your really meant for A::test to be publicly accessible, you could do something like this:

#include 


template 
struct ABase
{
  ABase(int n) : test_( n > M )
  {}

  bool const test_;
};


template 
struct A : ABase
{
  A(int n) : ABase(n)
  {}
};


template 
A::A(int n)
  : ABase<20>(n)
  { std::cerr << "One type" << std::endl; }

Kick the tires:

int main(int argc, char* argv[])
{
  A a(19);
  std::cout << "a:" << a.test_ << std::endl;
  A b(31);
  std::cout << "b:" << b.test_ << std::endl;
  return 0;
}