| |
| // (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000. |
| // (C) Copyright Eric Friedman 2002-2003. |
| // (C) Copyright Antony Polukhin 2013. |
| // Use, modification and distribution are subject to 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). |
| // |
| // See http://www.boost.org/libs/type_traits for most recent version including documentation. |
| |
| #ifndef BOOST_TT_IS_NOTHROW_MOVE_ASSIGNABLE_HPP_INCLUDED |
| #define BOOST_TT_IS_NOTHROW_MOVE_ASSIGNABLE_HPP_INCLUDED |
| |
| #include <boost/config.hpp> |
| #include <boost/type_traits/has_trivial_move_assign.hpp> |
| #include <boost/type_traits/has_nothrow_assign.hpp> |
| #include <boost/type_traits/is_array.hpp> |
| #include <boost/type_traits/is_reference.hpp> |
| #include <boost/utility/enable_if.hpp> |
| #include <boost/type_traits/declval.hpp> |
| |
| namespace boost { |
| |
| #ifdef BOOST_IS_NOTHROW_MOVE_ASSIGN |
| |
| template <class T> |
| struct is_nothrow_move_assignable : public integral_constant<bool, BOOST_IS_NOTHROW_MOVE_ASSIGN(T)>{}; |
| template <class T> struct is_nothrow_move_assignable<T const> : public false_type{}; |
| template <class T> struct is_nothrow_move_assignable<T volatile> : public false_type{}; |
| template <class T> struct is_nothrow_move_assignable<T const volatile> : public false_type{}; |
| template <class T> struct is_nothrow_move_assignable<T&> : public false_type{}; |
| #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) |
| template <class T> struct is_nothrow_move_assignable<T&&> : public false_type{}; |
| #endif |
| |
| #elif !defined(BOOST_NO_CXX11_NOEXCEPT) && !defined(BOOST_NO_SFINAE_EXPR) && !BOOST_WORKAROUND(BOOST_GCC_VERSION, < 40700) |
| |
| namespace detail{ |
| |
| template <class T, class Enable = void> |
| struct false_or_cpp11_noexcept_move_assignable: public ::boost::false_type {}; |
| |
| template <class T> |
| struct false_or_cpp11_noexcept_move_assignable < |
| T, |
| typename ::boost::enable_if_c<sizeof(T) && BOOST_NOEXCEPT_EXPR(::boost::declval<T&>() = ::boost::declval<T>())>::type |
| > : public ::boost::integral_constant<bool, BOOST_NOEXCEPT_EXPR(::boost::declval<T&>() = ::boost::declval<T>())> |
| {}; |
| |
| } |
| |
| template <class T> |
| struct is_nothrow_move_assignable : public integral_constant<bool, ::boost::detail::false_or_cpp11_noexcept_move_assignable<T>::value>{}; |
| |
| template <class T> struct is_nothrow_move_assignable<T const> : public ::boost::false_type {}; |
| template <class T> struct is_nothrow_move_assignable<T const volatile> : public ::boost::false_type{}; |
| template <class T> struct is_nothrow_move_assignable<T volatile> : public ::boost::false_type{}; |
| template <class T> struct is_nothrow_move_assignable<T&> : public ::boost::false_type{}; |
| #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES |
| template <class T> struct is_nothrow_move_assignable<T&&> : public ::boost::false_type{}; |
| #endif |
| |
| #else |
| |
| template <class T> |
| struct is_nothrow_move_assignable : public integral_constant<bool, |
| (::boost::has_trivial_move_assign<T>::value || ::boost::has_nothrow_assign<T>::value) && ! ::boost::is_array<T>::value>{}; |
| |
| #endif |
| |
| |
| template <> struct is_nothrow_move_assignable<void> : public false_type{}; |
| #ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS |
| template <> struct is_nothrow_move_assignable<void const> : public false_type{}; |
| template <> struct is_nothrow_move_assignable<void const volatile> : public false_type{}; |
| template <> struct is_nothrow_move_assignable<void volatile> : public false_type{}; |
| #endif |
| |
| } // namespace boost |
| |
| #endif // BOOST_TT_IS_NOTHROW_MOVE_ASSIGNABLE_HPP_INCLUDED |