How to check if two types are same at compiletime(bonus points if it works with Boost strong typedef)

Question

I was wondering if it is possible to check if 2 types are same at compile time. What I came up with is(idk if it works because it feels hackish and IDK standard that good so

Answer 1

Use std::is_same. std::is_same<T,U>::value will be true if T and U are the same type, false otherwise.

If you don't have C++11, it's easy to implement as this

template<class T, class U>
struct is_same {
    enum { value = 0 };
};

template<class T>
struct is_same<T, T> {
    enum { value = 1 };
};