1 | |
2 | // (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000. |
3 | // (C) Copyright Eric Friedman 2002-2003. |
4 | // (C) Copyright Antony Polukhin 2013. |
5 | // Use, modification and distribution are subject to the Boost Software License, |
6 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
7 | // http://www.boost.org/LICENSE_1_0.txt). |
8 | // |
9 | // See http://www.boost.org/libs/type_traits for most recent version including documentation. |
10 | |
11 | #ifndef BOOST_TT_IS_NOTHROW_MOVE_CONSTRUCTIBLE_HPP_INCLUDED |
12 | #define BOOST_TT_IS_NOTHROW_MOVE_CONSTRUCTIBLE_HPP_INCLUDED |
13 | |
14 | #include <cstddef> // size_t |
15 | #include <boost/config.hpp> |
16 | #include <boost/type_traits/intrinsics.hpp> |
17 | #include <boost/type_traits/integral_constant.hpp> |
18 | #include <boost/detail/workaround.hpp> |
19 | |
20 | #ifdef BOOST_IS_NOTHROW_MOVE_CONSTRUCT |
21 | |
22 | namespace boost { |
23 | |
24 | template <class T> |
25 | struct is_nothrow_move_constructible : public integral_constant<bool, BOOST_IS_NOTHROW_MOVE_CONSTRUCT(T)>{}; |
26 | |
27 | template <class T> struct is_nothrow_move_constructible<volatile T> : public ::boost::false_type {}; |
28 | template <class T> struct is_nothrow_move_constructible<const volatile T> : public ::boost::false_type{}; |
29 | |
30 | #elif !defined(BOOST_NO_CXX11_NOEXCEPT) && !defined(BOOST_NO_SFINAE_EXPR) && !BOOST_WORKAROUND(BOOST_GCC_VERSION, < 40800) |
31 | |
32 | #include <boost/type_traits/declval.hpp> |
33 | #include <boost/utility/enable_if.hpp> |
34 | |
35 | namespace boost{ namespace detail{ |
36 | |
37 | template <class T, class Enable = void> |
38 | struct false_or_cpp11_noexcept_move_constructible: public ::boost::false_type {}; |
39 | |
40 | template <class T> |
41 | struct false_or_cpp11_noexcept_move_constructible < |
42 | T, |
43 | typename ::boost::enable_if_c<sizeof(T) && BOOST_NOEXCEPT_EXPR(T(::boost::declval<T>()))>::type |
44 | > : public ::boost::integral_constant<bool, BOOST_NOEXCEPT_EXPR(T(::boost::declval<T>()))> |
45 | {}; |
46 | |
47 | } |
48 | |
49 | template <class T> struct is_nothrow_move_constructible |
50 | : public integral_constant<bool, ::boost::detail::false_or_cpp11_noexcept_move_constructible<T>::value>{}; |
51 | |
52 | template <class T> struct is_nothrow_move_constructible<volatile T> : public ::boost::false_type {}; |
53 | template <class T> struct is_nothrow_move_constructible<const volatile T> : public ::boost::false_type{}; |
54 | template <class T, std::size_t N> struct is_nothrow_move_constructible<T[N]> : public ::boost::false_type{}; |
55 | template <class T> struct is_nothrow_move_constructible<T[]> : public ::boost::false_type{}; |
56 | |
57 | #else |
58 | |
59 | #include <boost/type_traits/has_trivial_move_constructor.hpp> |
60 | #include <boost/type_traits/has_nothrow_copy.hpp> |
61 | #include <boost/type_traits/is_array.hpp> |
62 | |
63 | namespace boost{ |
64 | |
65 | template <class T> |
66 | struct is_nothrow_move_constructible |
67 | : public integral_constant<bool, |
68 | (::boost::has_trivial_move_constructor<T>::value || ::boost::has_nothrow_copy<T>::value) && !::boost::is_array<T>::value> |
69 | {}; |
70 | |
71 | #endif |
72 | |
73 | template <> struct is_nothrow_move_constructible<void> : false_type{}; |
74 | #ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS |
75 | template <> struct is_nothrow_move_constructible<void const> : false_type{}; |
76 | template <> struct is_nothrow_move_constructible<void volatile> : false_type{}; |
77 | template <> struct is_nothrow_move_constructible<void const volatile> : false_type{}; |
78 | #endif |
79 | // References are always trivially constructible, even if the thing they reference is not: |
80 | template <class T> struct is_nothrow_move_constructible<T&> : public ::boost::true_type{}; |
81 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES |
82 | template <class T> struct is_nothrow_move_constructible<T&&> : public ::boost::true_type{}; |
83 | #endif |
84 | |
85 | } // namespace boost |
86 | |
87 | #endif // BOOST_TT_IS_NOTHROW_MOVE_CONSTRUCTIBLE_HPP_INCLUDED |
88 | |