/*
    QMPlay2 is a video and audio player.
    Copyright (C) 2010-2017  Błażej Szczygieł

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published
    by the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#pragma once

#include <type_traits>

template<typename T>
void asConst(const T &t) = delete;

template<typename T>
constexpr typename std::add_const<T>::type &asConst(T &t) noexcept
{
    return t;
}

template<typename T>
void asConst(const T &&t) = delete;

template<typename T>
void asConst(T &&t) = delete;


template <typename... Args>
struct Overload
{
    template <typename R, typename T>
    constexpr auto operator()(R (T::*ptr)(Args...)) const noexcept -> decltype(ptr)
    {
        return ptr;
    }

    template <typename R, typename T>
    static constexpr auto of(R (T::*ptr)(Args...)) noexcept -> decltype(ptr)
    {
        return ptr;
    }
};
