LikeConstVersion

LikeConstVersion.h

#pragma once

template <typename T>
struct NonConst
{
    typedef T type;
};
template <typename T>
struct NonConst<T const>
{
    typedef T type;
}; // by value
template <typename T>
struct NonConst<T const&>
{
    typedef T& type;
}; // by reference
template <typename T>
struct NonConst<T const*>
{
    typedef T* type;
}; // by pointer
template <typename T>
struct NonConst<T const&&>
{
    typedef T&& type;
}; // by rvalue-reference

template <typename TConstReturn, class TObj, typename... TArgs>
typename NonConst<TConstReturn>::type
LikeConstVersion(TObj const* obj, TConstReturn (TObj::*memFun)(TArgs...) const, TArgs&&... args)
{
    return const_cast<typename NonConst<TConstReturn>::type>((obj->*memFun)(std::forward<TArgs>(args)...));
}