/*
 * eDSP, A cross-platform Digital Signal Processing library written in modern C++.
 * Copyright (C) 2018 Mohammed Boujemaoui Boulaghmoudi, All rights reserved.
 *
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU 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 General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along width
 * this program.  If not, see <http://www.gnu.org/licenses/>
 *
 * File: data.hpp
 * Date: 29/07/18
 * Author: Mohammed Boujemaoui
 */

#ifndef EDSP_META_DATA_HPP
#define EDSP_META_DATA_HPP

#include <initializer_list>

namespace edsp { namespace meta {

    template <class C>
    constexpr auto data(C& c) -> decltype(c.data()) {
        return c.data();
    }

    template <class C>
    constexpr auto data(const C& c) -> decltype(c.data()) {
        return c.data();
    }

    template <class T>
    constexpr const T* data(const T* ptr) {
        return ptr;
    }

    template <class T>
    constexpr T* data(T* ptr) {
        return ptr;
    }

    template <class T, std::size_t N>
    constexpr T* data(T (&array)[N]) noexcept {
        return array;
    }

    template <class T, std::size_t N>
    constexpr const T* data(const T (&array)[N]) noexcept {
        return array;
    }

    template <class E>
    constexpr const E* data(const std::initializer_list<E>& il) noexcept {
        return il.begin();
    }
}} // namespace edsp::meta

#endif //EDSP_META_DATA_HPP
