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 <boost/config.hpp> |
15 | #include <boost/type_traits/intrinsics.hpp> |
16 | #include <boost/type_traits/integral_constant.hpp> |
17 | #include <boost/detail/workaround.hpp> |
18 | |
19 | #ifdef BOOST_IS_NOTHROW_MOVE_CONSTRUCT |
20 | |
21 | namespace boost { |
22 | |
23 | template <class T> |
24 | struct is_nothrow_move_constructible : public integral_constant<bool, BOOST_IS_NOTHROW_MOVE_CONSTRUCT(T)>{}; |
25 | |
26 | template <class T> struct is_nothrow_move_constructible<volatile T> : public ::boost::false_type {}; |
27 | template <class T> struct is_nothrow_move_constructible<const volatile T> : public ::boost::false_type{}; |
28 | |
29 | #elif !defined(BOOST_NO_CXX11_NOEXCEPT) && !defined(BOOST_NO_SFINAE_EXPR) && !BOOST_WORKAROUND(BOOST_GCC_VERSION, < 40700) |
30 | |
31 | #include <boost/type_traits/declval.hpp> |
32 | #include <boost/utility/enable_if.hpp> |
33 | |
34 | namespace boost{ namespace detail{ |
35 | |
36 | template <class T, class Enable = void> |
37 | struct false_or_cpp11_noexcept_move_constructible: public ::boost::false_type {}; |
38 | |
39 | template <class T> |
40 | struct false_or_cpp11_noexcept_move_constructible < |
41 | T, |
42 | typename ::boost::enable_if_c<sizeof(T) && BOOST_NOEXCEPT_EXPR(T(::boost::declval<T>()))>::type |
43 | > : public ::boost::integral_constant<bool, BOOST_NOEXCEPT_EXPR(T(::boost::declval<T>()))> |
44 | {}; |
45 | |
46 | } |
47 | |
48 | template <class T> struct is_nothrow_move_constructible |
49 | : public integral_constant<bool, ::boost::detail::false_or_cpp11_noexcept_move_constructible<T>::value>{}; |
50 | |
51 | template <class T> struct is_nothrow_move_constructible<volatile T> : public ::boost::false_type {}; |
52 | template <class T> struct is_nothrow_move_constructible<const volatile T> : public ::boost::false_type{}; |
53 | template <class T, std::size_t N> struct is_nothrow_move_constructible<T[N]> : public ::boost::false_type{}; |
54 | template <class T> struct is_nothrow_move_constructible<T[]> : public ::boost::false_type{}; |
55 | |
56 | #else |
57 | |
58 | #include <boost/type_traits/has_trivial_move_constructor.hpp> |
59 | #include <boost/type_traits/has_nothrow_copy.hpp> |
60 | #include <boost/type_traits/is_array.hpp> |
61 | |
62 | namespace boost{ |
63 | |
64 | template <class T> |
65 | struct is_nothrow_move_constructible |
66 | : public integral_constant<bool, |
67 | (::boost::has_trivial_move_constructor<T>::value || ::boost::has_nothrow_copy<T>::value) && !::boost::is_array<T>::value> |
68 | {}; |
69 | |
70 | #endif |
71 | |
72 | template <> struct is_nothrow_move_constructible<void> : false_type{}; |
73 | #ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS |
74 | template <> struct is_nothrow_move_constructible<void const> : false_type{}; |
75 | template <> struct is_nothrow_move_constructible<void volatile> : false_type{}; |
76 | template <> struct is_nothrow_move_constructible<void const volatile> : false_type{}; |
77 | #endif |
78 | // References are always trivially constructible, even if the thing they reference is not: |
79 | template <class T> struct is_nothrow_move_constructible<T&> : public ::boost::true_type{}; |
80 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES |
81 | template <class T> struct is_nothrow_move_constructible<T&&> : public ::boost::true_type{}; |
82 | #endif |
83 | |
84 | } // namespace boost |
85 | |
86 | #endif // BOOST_TT_IS_NOTHROW_MOVE_CONSTRUCTIBLE_HPP_INCLUDED |
87 | |