88 lines
3.6 KiB
Plaintext
88 lines
3.6 KiB
Plaintext
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// (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000.
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// (C) Copyright Eric Friedman 2002-2003.
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// (C) Copyright Antony Polukhin 2013.
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// Use, modification and distribution are subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt).
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//
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// See http://www.boost.org/libs/type_traits for most recent version including documentation.
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#ifndef BOOST_TT_IS_NOTHROW_MOVE_CONSTRUCTIBLE_HPP_INCLUDED
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#define BOOST_TT_IS_NOTHROW_MOVE_CONSTRUCTIBLE_HPP_INCLUDED
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#include <cstddef> // size_t
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#include <boost/config.hpp>
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#include <boost/type_traits/intrinsics.hpp>
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#include <boost/type_traits/integral_constant.hpp>
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#include <boost/detail/workaround.hpp>
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#ifdef BOOST_IS_NOTHROW_MOVE_CONSTRUCT
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namespace boost {
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template <class T>
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struct is_nothrow_move_constructible : public integral_constant<bool, BOOST_IS_NOTHROW_MOVE_CONSTRUCT(T)>{};
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template <class T> struct is_nothrow_move_constructible<volatile T> : public ::boost::false_type {};
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template <class T> struct is_nothrow_move_constructible<const volatile T> : public ::boost::false_type{};
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#elif !defined(BOOST_NO_CXX11_NOEXCEPT) && !defined(BOOST_NO_SFINAE_EXPR) && !BOOST_WORKAROUND(BOOST_GCC_VERSION, < 40800)
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#include <boost/type_traits/declval.hpp>
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#include <boost/utility/enable_if.hpp>
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namespace boost{ namespace detail{
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template <class T, class Enable = void>
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struct false_or_cpp11_noexcept_move_constructible: public ::boost::false_type {};
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template <class T>
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struct false_or_cpp11_noexcept_move_constructible <
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T,
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typename ::boost::enable_if_c<sizeof(T) && BOOST_NOEXCEPT_EXPR(T(::boost::declval<T>()))>::type
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> : public ::boost::integral_constant<bool, BOOST_NOEXCEPT_EXPR(T(::boost::declval<T>()))>
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{};
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}
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template <class T> struct is_nothrow_move_constructible
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: public integral_constant<bool, ::boost::detail::false_or_cpp11_noexcept_move_constructible<T>::value>{};
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template <class T> struct is_nothrow_move_constructible<volatile T> : public ::boost::false_type {};
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template <class T> struct is_nothrow_move_constructible<const volatile T> : public ::boost::false_type{};
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template <class T, std::size_t N> struct is_nothrow_move_constructible<T[N]> : public ::boost::false_type{};
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template <class T> struct is_nothrow_move_constructible<T[]> : public ::boost::false_type{};
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#else
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#include <boost/type_traits/has_trivial_move_constructor.hpp>
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#include <boost/type_traits/has_nothrow_copy.hpp>
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#include <boost/type_traits/is_array.hpp>
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namespace boost{
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template <class T>
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struct is_nothrow_move_constructible
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: public integral_constant<bool,
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(::boost::has_trivial_move_constructor<T>::value || ::boost::has_nothrow_copy<T>::value) && !::boost::is_array<T>::value>
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{};
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#endif
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template <> struct is_nothrow_move_constructible<void> : false_type{};
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#ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS
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template <> struct is_nothrow_move_constructible<void const> : false_type{};
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template <> struct is_nothrow_move_constructible<void volatile> : false_type{};
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template <> struct is_nothrow_move_constructible<void const volatile> : false_type{};
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#endif
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// References are always trivially constructible, even if the thing they reference is not:
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template <class T> struct is_nothrow_move_constructible<T&> : public ::boost::true_type{};
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#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
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template <class T> struct is_nothrow_move_constructible<T&&> : public ::boost::true_type{};
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#endif
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} // namespace boost
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#endif // BOOST_TT_IS_NOTHROW_MOVE_CONSTRUCTIBLE_HPP_INCLUDED
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