Question

Just as the question says, can I find out whether a type has a const modifier via typetraits?

Answer 1

In C++11, you can use std::is_const. Just include <type_traits> header.

In C++03, it is easy to implement this yourself:

template<typename T> 
struct is_const 
{
    const static bool value = false;
};

template<typename T> 
struct is_const<const T>
{
    const static bool value = true;
};