/*============================================================================= Copyright (c) 2011-2017 Bolero MURAKAMI https://github.com/bolero-MURAKAMI/Sprout Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) =============================================================================*/ #ifndef SPROUT_FUNCTIONAL_ASSIGN_HPP #define SPROUT_FUNCTIONAL_ASSIGN_HPP #include <utility> #include <sprout/config.hpp> #include <sprout/utility/forward.hpp> #include <sprout/functional/transparent.hpp> namespace sprout { // // assign // template<typename T = void> struct assign; template<> struct assign<void> : public sprout::transparent<> { public: template<typename T, typename U> SPROUT_CONSTEXPR decltype(std::declval<T>() = std::declval<U>()) operator()(T&& x, U&& y) const SPROUT_NOEXCEPT_IF_EXPR(std::declval<T>() = std::declval<U>()) { return SPROUT_FORWARD(T, x) = SPROUT_FORWARD(U, y); } }; } // namespace sprout #endif // #ifndef SPROUT_FUNCTIONAL_ASSIGN_HPP