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c0ffa2ba | 1 | // C++11 <typeindex> -*- C++ -*- |
bafa9791 | 2 | |
99dee823 | 3 | // Copyright (C) 2010-2021 Free Software Foundation, Inc. |
bafa9791 PC |
4 | // |
5 | // This file is part of the GNU ISO C++ Library. This library is free | |
6 | // software; you can redistribute it and/or modify it under the | |
7 | // terms of the GNU General Public License as published by the | |
8 | // Free Software Foundation; either version 3, or (at your option) | |
9 | // any later version. | |
10 | ||
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | ||
16 | // Under Section 7 of GPL version 3, you are granted additional | |
17 | // permissions described in the GCC Runtime Library Exception, version | |
18 | // 3.1, as published by the Free Software Foundation. | |
19 | ||
20 | // You should have received a copy of the GNU General Public License and | |
21 | // a copy of the GCC Runtime Library Exception along with this program; | |
22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | // <http://www.gnu.org/licenses/>. | |
24 | ||
25 | /** @file include/typeindex | |
26 | * This is a Standard C++ Library header. | |
27 | */ | |
28 | ||
29 | #ifndef _GLIBCXX_TYPEINDEX | |
30 | #define _GLIBCXX_TYPEINDEX 1 | |
31 | ||
32 | #pragma GCC system_header | |
33 | ||
734f5023 | 34 | #if __cplusplus < 201103L |
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35 | # include <bits/c++0x_warning.h> |
36 | #else | |
37 | ||
bafa9791 | 38 | #include <typeinfo> |
4714fd14 JW |
39 | #if __cplusplus > 201703L |
40 | # include <compare> | |
41 | #endif | |
bafa9791 | 42 | |
12ffa228 BK |
43 | namespace std _GLIBCXX_VISIBILITY(default) |
44 | { | |
45 | _GLIBCXX_BEGIN_NAMESPACE_VERSION | |
53dc5044 | 46 | |
bafa9791 | 47 | /** |
c0ffa2ba BK |
48 | * @brief Class type_index |
49 | * @ingroup utilities | |
50 | * | |
51 | * The class type_index provides a simple wrapper for type_info | |
52 | * which can be used as an index type in associative containers | |
53 | * (23.6) and in unordered associative containers (23.7). | |
bafa9791 PC |
54 | */ |
55 | struct type_index | |
56 | { | |
2789f415 | 57 | type_index(const type_info& __rhs) noexcept |
bafa9791 PC |
58 | : _M_target(&__rhs) { } |
59 | ||
60 | bool | |
2789f415 | 61 | operator==(const type_index& __rhs) const noexcept |
bafa9791 PC |
62 | { return *_M_target == *__rhs._M_target; } |
63 | ||
4714fd14 | 64 | #if ! __cpp_lib_three_way_comparison |
bafa9791 | 65 | bool |
2789f415 | 66 | operator!=(const type_index& __rhs) const noexcept |
bafa9791 | 67 | { return *_M_target != *__rhs._M_target; } |
4714fd14 | 68 | #endif |
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69 | |
70 | bool | |
2789f415 | 71 | operator<(const type_index& __rhs) const noexcept |
bafa9791 PC |
72 | { return _M_target->before(*__rhs._M_target); } |
73 | ||
74 | bool | |
2789f415 | 75 | operator<=(const type_index& __rhs) const noexcept |
bafa9791 PC |
76 | { return !__rhs._M_target->before(*_M_target); } |
77 | ||
78 | bool | |
2789f415 | 79 | operator>(const type_index& __rhs) const noexcept |
bafa9791 PC |
80 | { return __rhs._M_target->before(*_M_target); } |
81 | ||
82 | bool | |
2789f415 | 83 | operator>=(const type_index& __rhs) const noexcept |
bafa9791 PC |
84 | { return !_M_target->before(*__rhs._M_target); } |
85 | ||
4714fd14 JW |
86 | #if __cpp_lib_three_way_comparison |
87 | strong_ordering | |
88 | operator<=>(const type_index& __rhs) const noexcept | |
89 | { | |
90 | if (*_M_target == *__rhs._M_target) | |
91 | return strong_ordering::equal; | |
92 | if (_M_target->before(*__rhs._M_target)) | |
93 | return strong_ordering::less; | |
94 | return strong_ordering::greater; | |
95 | } | |
96 | #endif | |
97 | ||
bafa9791 | 98 | size_t |
72f1c34b | 99 | hash_code() const noexcept |
bafa9791 PC |
100 | { return _M_target->hash_code(); } |
101 | ||
102 | const char* | |
f92126ba | 103 | name() const noexcept |
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104 | { return _M_target->name(); } |
105 | ||
106 | private: | |
107 | const type_info* _M_target; | |
108 | }; | |
109 | ||
110 | template<typename _Tp> struct hash; | |
111 | ||
112 | /// std::hash specialization for type_index. | |
113 | template<> | |
114 | struct hash<type_index> | |
bafa9791 | 115 | { |
5d64ee19 PC |
116 | typedef size_t result_type; |
117 | typedef type_index argument_type; | |
118 | ||
bafa9791 | 119 | size_t |
72f1c34b | 120 | operator()(const type_index& __ti) const noexcept |
bafa9791 PC |
121 | { return __ti.hash_code(); } |
122 | }; | |
53dc5044 | 123 | |
12ffa228 | 124 | _GLIBCXX_END_NAMESPACE_VERSION |
c0ffa2ba | 125 | } // namespace std |
bafa9791 | 126 | |
734f5023 | 127 | #endif // C++11 |
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128 | |
129 | #endif // _GLIBCXX_TYPEINDEX |