/**
 * @author Edouard DUPIN
 * @copyright 2011, Edouard DUPIN, all right reserved
 * @license MPL-2 (see license file)
 */
#pragma once

#include <etk/typeTrait.hpp>
namespace etk {
	template<class ETK_MOVE_TYPE>
	struct RemoveReference {
		// remove reference
		typedef ETK_MOVE_TYPE m_type;
	};
	template<class ETK_MOVE_TYPE>
	struct RemoveReference<ETK_MOVE_TYPE&> {
		// remove reference
		typedef ETK_MOVE_TYPE m_type;
	};
	template<class ETK_MOVE_TYPE>
	struct RemoveReference<ETK_MOVE_TYPE&&> {
		// remove rvalue reference
		typedef ETK_MOVE_TYPE m_type;
	};
	template<typename ETK_MOVE_TYPE>
	inline typename etk::RemoveReference<ETK_MOVE_TYPE>::m_type&& move(ETK_MOVE_TYPE&& _obj) {
		// forward _Arg as movable
		return (typename etk::RemoveReference<ETK_MOVE_TYPE>::m_type&&)_obj;
	}
	
	template<typename ETK_SWAP_TYPE,
	         typename etk::EnableIf<etk::Is_swap_MemberFunctionExists<ETK_SWAP_TYPE>::value,int>::type = 0>
	inline void swap(ETK_SWAP_TYPE& _obj1, ETK_SWAP_TYPE& _obj2) {
		_obj1.swap(_obj2);
	}
	template<typename ETK_SWAP_TYPE,
	         typename etk::EnableIf<!etk::Is_swap_MemberFunctionExists<ETK_SWAP_TYPE>::value,int>::type = 0>
	inline void swap(ETK_SWAP_TYPE& _obj1, ETK_SWAP_TYPE& _obj2) {
		ETK_SWAP_TYPE tmp = etk::move(_obj1);
		_obj1 = etk::move(_obj2);
		_obj2 = etk::move(tmp);
	}
	template <class ETK_FORWARD_TYPE>
	inline ETK_FORWARD_TYPE&& forward(typename etk::RemoveReference<ETK_FORWARD_TYPE>::m_type& _obj) noexcept {
		return static_cast<ETK_FORWARD_TYPE&&>(_obj);
	}
	
	template <class ETK_FORWARD_TYPE>
	inline ETK_FORWARD_TYPE&& forward(typename etk::RemoveReference<ETK_FORWARD_TYPE>::m_type&& _obj) noexcept {
		static_assert(!etk::IsLeftValueReference<ETK_FORWARD_TYPE>::type, "Can not forward a right value as a left value.");
		return static_cast<ETK_FORWARD_TYPE&&>(_obj);
	}
	
}