How can I enforce that a template parameter used implements some interface in C++?

Question

I don't think this is possible in C++, what options do I have to simulate the behavior?

Answer 1

Use std::is_base_of as:

template<typename T>
class A
{
    static_assert(std::is_base_of<IMyInterface, T>::value, 
                  "T must derive from IMyInterface");
};

You can same in function template as well.

Answer 2

You can use std::is_base_of<YourInterface, YourParameter>, and make an error if the result is false. Remember this is C++11.