is_copyable.hpp

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//
//  CeresEngine - A game development framework
//
//  Created by Rogiel Sulzbach.
//  Copyright (c) 2018-2022 Rogiel Sulzbach. All rights reserved.
//
 
#pragma once
 
#include "CeresEngine/Foundation/Traits/is_assignable_from.hpp"
#include "CeresEngine/Foundation/Traits/is_movable.hpp"
 
#include <type_traits>
 
namespace CeresEngine::traits {
 
    template<class T, class = void> struct is_copyable : std::false_type {};
 
    template<class T>
    struct is_copyable<T,
        std::enable_if_t<
            // clang-format off
            std::is_copy_constructible_v<T> &&
            is_movable_v<T> &&
            is_assignable_from_v<T&, T&> &&
            is_assignable_from_v<T&, std::add_const_t<T>&> &&
            is_assignable_from_v<T&, std::add_const_t<T>>
            // clang-format on
            >> : std::true_type {};
 
    template<class T> bool constexpr is_copyable_v = is_copyable<T>::value;
 
    template<class T>
    concept copyable = is_copyable_v<T>;
 
} // namespace CeresEngine::traits