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#include <boost/type_traits/is_complete.hpp>
20#include <boost/static_assert.hpp>
21
22#ifdef BOOST_IS_NOTHROW_MOVE_CONSTRUCT
23
24namespace boost {
25
26template <class T>
27struct is_nothrow_move_constructible : public integral_constant<bool, BOOST_IS_NOTHROW_MOVE_CONSTRUCT(T)>
28{
29 BOOST_STATIC_ASSERT_MSG(boost::is_complete<T>::value, "Arguments to is_nothrow_move_constructible must be complete types");
30};
31
32template <class T> struct is_nothrow_move_constructible<volatile T> : public ::boost::false_type {};
33template <class T> struct is_nothrow_move_constructible<const volatile T> : public ::boost::false_type{};
34
35#elif !defined(BOOST_NO_CXX11_NOEXCEPT) && !defined(BOOST_NO_SFINAE_EXPR) && !BOOST_WORKAROUND(BOOST_GCC_VERSION, < 40700)
36
37#include <boost/type_traits/declval.hpp>
38#include <boost/type_traits/enable_if.hpp>
39
40namespace boost{ namespace detail{
41
42template <class T, class Enable = void>
43struct false_or_cpp11_noexcept_move_constructible: public ::boost::false_type {};
44
45template <class T>
46struct false_or_cpp11_noexcept_move_constructible <
47 T,
48 typename ::boost::enable_if_<sizeof(T) && BOOST_NOEXCEPT_EXPR(T(::boost::declval<T>()))>::type
49 > : public ::boost::integral_constant<bool, BOOST_NOEXCEPT_EXPR(T(::boost::declval<T>()))>
50{};
51
52}
53
54template <class T> struct is_nothrow_move_constructible
55 : public integral_constant<bool, ::boost::detail::false_or_cpp11_noexcept_move_constructible<T>::value>
56{
57 BOOST_STATIC_ASSERT_MSG(boost::is_complete<T>::value, "Arguments to is_nothrow_move_constructible must be complete types");
58};
59
60template <class T> struct is_nothrow_move_constructible<volatile T> : public ::boost::false_type {};
61template <class T> struct is_nothrow_move_constructible<const volatile T> : public ::boost::false_type{};
62template <class T, std::size_t N> struct is_nothrow_move_constructible<T[N]> : public ::boost::false_type{};
63template <class T> struct is_nothrow_move_constructible<T[]> : public ::boost::false_type{};
64
65#else
66
67#include <boost/type_traits/has_trivial_move_constructor.hpp>
68#include <boost/type_traits/has_nothrow_copy.hpp>
69#include <boost/type_traits/is_array.hpp>
70
71namespace boost{
72
73template <class T>
74struct is_nothrow_move_constructible
75 : public integral_constant<bool,
76 (::boost::has_trivial_move_constructor<T>::value || ::boost::has_nothrow_copy<T>::value) && !::boost::is_array<T>::value>
77{
78 BOOST_STATIC_ASSERT_MSG(boost::is_complete<T>::value, "Arguments to is_nothrow_move_constructible must be complete types");
79};
80
81#endif
82
83template <> struct is_nothrow_move_constructible<void> : false_type{};
84#ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS
85template <> struct is_nothrow_move_constructible<void const> : false_type{};
86template <> struct is_nothrow_move_constructible<void volatile> : false_type{};
87template <> struct is_nothrow_move_constructible<void const volatile> : false_type{};
88#endif
89// References are always trivially constructible, even if the thing they reference is not:
90template <class T> struct is_nothrow_move_constructible<T&> : public ::boost::true_type{};
91#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
92template <class T> struct is_nothrow_move_constructible<T&&> : public ::boost::true_type{};
93#endif
94
95} // namespace boost
96
97#endif // BOOST_TT_IS_NOTHROW_MOVE_CONSTRUCTIBLE_HPP_INCLUDED
98

source code of boost/libs/type_traits/include/boost/type_traits/is_nothrow_move_constructible.hpp