IToString.h

#pragma once
 
#include <string>
#include <type_traits>
 
namespace sw
{
    template <typename TDerived>
    class IToString
    {
    public:
        std::wstring ToString() const
        {
            static_assert(
                !std::is_same<
                    decltype(&IToString<TDerived>::ToString),
                    decltype(&TDerived::ToString)>::value,
                "Derived class must implement ToString method.");
 
            return static_cast<const TDerived *>(this)->ToString();
        }
    };
}