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1 | ////////////////////////////////////////////////////////////////////////////// |
2 | // | |
3 | // (C) Copyright Ion Gaztanaga 2012-2012. | |
4 | // Distributed under the Boost Software License, Version 1.0. | |
5 | // (See accompanying file LICENSE_1_0.txt or copy at | |
6 | // http://www.boost.org/LICENSE_1_0.txt) | |
7 | // | |
8 | // See http://www.boost.org/libs/move for documentation. | |
9 | // | |
10 | ////////////////////////////////////////////////////////////////////////////// | |
11 | ||
12 | //! \file | |
13 | //! This header includes core utilities from <tt><boost/move/utility_core.hpp></tt> and defines | |
14 | //! some more advanced utilities such as: | |
15 | ||
16 | #ifndef BOOST_MOVE_MOVE_UTILITY_HPP | |
17 | #define BOOST_MOVE_MOVE_UTILITY_HPP | |
18 | ||
19 | #ifndef BOOST_CONFIG_HPP | |
20 | # include <boost/config.hpp> | |
21 | #endif | |
22 | # | |
23 | #if defined(BOOST_HAS_PRAGMA_ONCE) | |
24 | # pragma once | |
25 | #endif | |
26 | ||
27 | #include <boost/move/detail/config_begin.hpp> | |
28 | #include <boost/move/detail/workaround.hpp> //forceinline | |
29 | #include <boost/move/utility_core.hpp> | |
30 | #include <boost/move/traits.hpp> | |
31 | ||
32 | #if defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && !defined(BOOST_MOVE_DOXYGEN_INVOKED) | |
33 | ||
34 | namespace boost { | |
35 | ||
36 | ////////////////////////////////////////////////////////////////////////////// | |
37 | // | |
38 | // move_if_noexcept() | |
39 | // | |
40 | ////////////////////////////////////////////////////////////////////////////// | |
41 | ||
42 | template <class T> | |
43 | BOOST_MOVE_FORCEINLINE typename ::boost::move_detail::enable_if_c | |
44 | < enable_move_utility_emulation<T>::value && !has_move_emulation_enabled<T>::value | |
45 | , typename ::boost::move_detail::add_const<T>::type & | |
46 | >::type | |
47 | move_if_noexcept(T& x) BOOST_NOEXCEPT | |
48 | { | |
49 | return x; | |
50 | } | |
51 | ||
52 | template <class T> | |
53 | BOOST_MOVE_FORCEINLINE typename ::boost::move_detail::enable_if_c | |
54 | < enable_move_utility_emulation<T>::value && has_move_emulation_enabled<T>::value | |
55 | && ::boost::move_detail::is_nothrow_move_constructible_or_uncopyable<T>::value, rv<T>&>::type | |
56 | move_if_noexcept(T& x) BOOST_NOEXCEPT | |
57 | { | |
58 | return *static_cast<rv<T>* >(::boost::move_detail::addressof(x)); | |
59 | } | |
60 | ||
61 | template <class T> | |
62 | BOOST_MOVE_FORCEINLINE typename ::boost::move_detail::enable_if_c | |
63 | < enable_move_utility_emulation<T>::value && has_move_emulation_enabled<T>::value | |
64 | && ::boost::move_detail::is_nothrow_move_constructible_or_uncopyable<T>::value | |
65 | , rv<T>& | |
66 | >::type | |
67 | move_if_noexcept(rv<T>& x) BOOST_NOEXCEPT | |
68 | { | |
69 | return x; | |
70 | } | |
71 | ||
72 | template <class T> | |
73 | BOOST_MOVE_FORCEINLINE typename ::boost::move_detail::enable_if_c | |
74 | < enable_move_utility_emulation<T>::value && has_move_emulation_enabled<T>::value | |
75 | && !::boost::move_detail::is_nothrow_move_constructible_or_uncopyable<T>::value | |
76 | , typename ::boost::move_detail::add_const<T>::type & | |
77 | >::type | |
78 | move_if_noexcept(T& x) BOOST_NOEXCEPT | |
79 | { | |
80 | return x; | |
81 | } | |
82 | ||
83 | template <class T> | |
84 | BOOST_MOVE_FORCEINLINE typename ::boost::move_detail::enable_if_c | |
85 | < enable_move_utility_emulation<T>::value && has_move_emulation_enabled<T>::value | |
86 | && !::boost::move_detail::is_nothrow_move_constructible_or_uncopyable<T>::value | |
87 | , typename ::boost::move_detail::add_const<T>::type & | |
88 | >::type | |
89 | move_if_noexcept(rv<T>& x) BOOST_NOEXCEPT | |
90 | { | |
91 | return x; | |
92 | } | |
93 | ||
94 | } //namespace boost | |
95 | ||
96 | #else //#if defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && !defined(BOOST_MOVE_DOXYGEN_INVOKED) | |
97 | ||
98 | #if defined(BOOST_MOVE_USE_STANDARD_LIBRARY_MOVE) | |
99 | #include <utility> | |
100 | ||
101 | namespace boost{ | |
102 | ||
103 | using ::std::move_if_noexcept; | |
104 | ||
105 | } //namespace boost | |
106 | ||
107 | #else //!BOOST_MOVE_USE_STANDARD_LIBRARY_MOVE | |
108 | ||
109 | namespace boost { | |
110 | ||
111 | ////////////////////////////////////////////////////////////////////////////// | |
112 | // | |
113 | // move_if_noexcept() | |
114 | // | |
115 | ////////////////////////////////////////////////////////////////////////////// | |
116 | #if defined(BOOST_MOVE_DOXYGEN_INVOKED) | |
117 | //! This function provides a way to convert a reference into a rvalue reference | |
118 | //! in compilers with rvalue references. For other compilers converts T & into | |
119 | //! <i>::boost::rv<T> &</i> so that move emulation is activated. Reference | |
120 | //! would be converted to rvalue reference only if input type is nothrow move | |
121 | //! constructible or if it has no copy constructor. In all other cases const | |
122 | //! reference would be returned | |
123 | template <class T> | |
124 | rvalue_reference_or_const_lvalue_reference move_if_noexcept(input_reference) noexcept; | |
125 | ||
126 | #else //BOOST_MOVE_DOXYGEN_INVOKED | |
127 | ||
128 | template <class T> | |
129 | BOOST_MOVE_FORCEINLINE typename ::boost::move_detail::enable_if_c | |
130 | < ::boost::move_detail::is_nothrow_move_constructible_or_uncopyable<T>::value, T&&>::type | |
131 | move_if_noexcept(T& x) BOOST_NOEXCEPT | |
132 | { return ::boost::move(x); } | |
133 | ||
134 | template <class T> | |
135 | BOOST_MOVE_FORCEINLINE typename ::boost::move_detail::enable_if_c | |
136 | < !::boost::move_detail::is_nothrow_move_constructible_or_uncopyable<T>::value, const T&>::type | |
137 | move_if_noexcept(T& x) BOOST_NOEXCEPT | |
138 | { return x; } | |
139 | ||
140 | #endif //BOOST_MOVE_DOXYGEN_INVOKED | |
141 | ||
142 | } //namespace boost { | |
143 | ||
144 | #endif //#if defined(BOOST_MOVE_USE_STANDARD_LIBRARY_MOVE) | |
145 | ||
146 | #endif //BOOST_NO_CXX11_RVALUE_REFERENCES | |
147 | ||
148 | #include <boost/move/detail/config_end.hpp> | |
149 | ||
150 | #endif //#ifndef BOOST_MOVE_MOVE_UTILITY_HPP |