]>
Commit | Line | Data |
---|---|---|
7c673cae FG |
1 | //----------------------------------------------------------------------------- |
2 | // boost variant/recursive_wrapper.hpp header file | |
3 | // See http://www.boost.org for updates, documentation, and revision history. | |
4 | //----------------------------------------------------------------------------- | |
5 | // | |
6 | // Copyright (c) 2002-2003 | |
7 | // Eric Friedman, Itay Maman | |
8 | // | |
9 | // Distributed under the Boost Software License, Version 1.0. (See | |
10 | // accompanying file LICENSE_1_0.txt or copy at | |
11 | // http://www.boost.org/LICENSE_1_0.txt) | |
12 | ||
13 | #ifndef BOOST_VARIANT_RECURSIVE_WRAPPER_HPP | |
14 | #define BOOST_VARIANT_RECURSIVE_WRAPPER_HPP | |
15 | ||
16 | #include <boost/variant/recursive_wrapper_fwd.hpp> | |
17 | #include <boost/variant/detail/move.hpp> | |
18 | #include <boost/checked_delete.hpp> | |
19 | ||
20 | namespace boost { | |
21 | ||
22 | ////////////////////////////////////////////////////////////////////////// | |
23 | // class template recursive_wrapper | |
24 | // | |
25 | // See docs and recursive_wrapper_fwd.hpp for more information. | |
26 | // | |
27 | ||
28 | template <typename T> | |
29 | class recursive_wrapper | |
30 | { | |
31 | public: // typedefs | |
32 | ||
33 | typedef T type; | |
34 | ||
35 | private: // representation | |
36 | ||
37 | T* p_; | |
38 | ||
39 | public: // structors | |
40 | ||
41 | ~recursive_wrapper(); | |
42 | recursive_wrapper(); | |
43 | ||
44 | recursive_wrapper(const recursive_wrapper& operand); | |
45 | recursive_wrapper(const T& operand); | |
46 | ||
47 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES | |
48 | recursive_wrapper(recursive_wrapper&& operand); | |
49 | recursive_wrapper(T&& operand); | |
50 | #endif | |
51 | ||
52 | private: // helpers, for modifiers (below) | |
53 | ||
54 | void assign(const T& rhs); | |
55 | ||
56 | public: // modifiers | |
57 | ||
58 | recursive_wrapper& operator=(const recursive_wrapper& rhs) | |
59 | { | |
60 | assign( rhs.get() ); | |
61 | return *this; | |
62 | } | |
63 | ||
64 | recursive_wrapper& operator=(const T& rhs) | |
65 | { | |
66 | assign( rhs ); | |
67 | return *this; | |
68 | } | |
69 | ||
70 | void swap(recursive_wrapper& operand) BOOST_NOEXCEPT | |
71 | { | |
72 | T* temp = operand.p_; | |
73 | operand.p_ = p_; | |
74 | p_ = temp; | |
75 | } | |
76 | ||
77 | ||
78 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES | |
79 | recursive_wrapper& operator=(recursive_wrapper&& rhs) BOOST_NOEXCEPT | |
80 | { | |
81 | swap(rhs); | |
82 | return *this; | |
83 | } | |
84 | ||
85 | recursive_wrapper& operator=(T&& rhs) | |
86 | { | |
87 | get() = detail::variant::move(rhs); | |
88 | return *this; | |
89 | } | |
90 | #endif | |
91 | ||
92 | public: // queries | |
93 | ||
94 | T& get() { return *get_pointer(); } | |
95 | const T& get() const { return *get_pointer(); } | |
96 | ||
97 | T* get_pointer() { return p_; } | |
98 | const T* get_pointer() const { return p_; } | |
99 | ||
100 | }; | |
101 | ||
102 | template <typename T> | |
103 | recursive_wrapper<T>::~recursive_wrapper() | |
104 | { | |
105 | boost::checked_delete(p_); | |
106 | } | |
107 | ||
108 | template <typename T> | |
109 | recursive_wrapper<T>::recursive_wrapper() | |
110 | : p_(new T) | |
111 | { | |
112 | } | |
113 | ||
114 | template <typename T> | |
115 | recursive_wrapper<T>::recursive_wrapper(const recursive_wrapper& operand) | |
116 | : p_(new T( operand.get() )) | |
117 | { | |
118 | } | |
119 | ||
120 | template <typename T> | |
121 | recursive_wrapper<T>::recursive_wrapper(const T& operand) | |
122 | : p_(new T(operand)) | |
123 | { | |
124 | } | |
125 | ||
126 | #ifndef BOOST_NO_CXX11_RVALUE_REFERENCES | |
127 | template <typename T> | |
128 | recursive_wrapper<T>::recursive_wrapper(recursive_wrapper&& operand) | |
129 | : p_(new T( detail::variant::move(operand.get()) )) | |
130 | { | |
131 | } | |
132 | ||
133 | template <typename T> | |
134 | recursive_wrapper<T>::recursive_wrapper(T&& operand) | |
135 | : p_(new T( detail::variant::move(operand) )) | |
136 | { | |
137 | } | |
138 | #endif | |
139 | ||
140 | template <typename T> | |
141 | void recursive_wrapper<T>::assign(const T& rhs) | |
142 | { | |
143 | this->get() = rhs; | |
144 | } | |
145 | ||
146 | // function template swap | |
147 | // | |
148 | // Swaps two recursive_wrapper<T> objects of the same type T. | |
149 | // | |
150 | template <typename T> | |
151 | inline void swap(recursive_wrapper<T>& lhs, recursive_wrapper<T>& rhs) BOOST_NOEXCEPT | |
152 | { | |
153 | lhs.swap(rhs); | |
154 | } | |
155 | ||
156 | } // namespace boost | |
157 | ||
158 | #endif // BOOST_VARIANT_RECURSIVE_WRAPPER_HPP |