1// C++0x typeindex -*- C++ -*-
2
3// Copyright (C) 2010, 2011 Free Software Foundation, Inc.
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
34#ifndef __GXX_EXPERIMENTAL_CXX0X__
35# include <bits/c++0x_warning.h>
36#else
37
38#include <typeinfo>
39
40namespace std _GLIBCXX_VISIBILITY(default)
41{
42_GLIBCXX_BEGIN_NAMESPACE_VERSION
43
44  /**
45     @brief The class type_index provides a simple wrapper for type_info
46     which can be used as an index type in associative containers (23.6)
47     and in unordered associative containers (23.7).
48   */
49  struct type_index
50  {
51    type_index(const type_info& __rhs) noexcept
52    : _M_target(&__rhs) { }
53
54    bool
55    operator==(const type_index& __rhs) const noexcept
56    { return *_M_target == *__rhs._M_target; }
57
58    bool
59    operator!=(const type_index& __rhs) const noexcept
60    { return *_M_target != *__rhs._M_target; }
61
62    bool
63    operator<(const type_index& __rhs) const noexcept
64    { return _M_target->before(*__rhs._M_target); }
65
66    bool
67    operator<=(const type_index& __rhs) const noexcept
68    { return !__rhs._M_target->before(*_M_target); }
69
70    bool
71    operator>(const type_index& __rhs) const noexcept
72    { return __rhs._M_target->before(*_M_target); }
73
74    bool
75    operator>=(const type_index& __rhs) const noexcept
76    { return !_M_target->before(*__rhs._M_target); }
77
78    size_t
79    hash_code() const noexcept
80    { return _M_target->hash_code(); }
81
82    const char*
83    name() const
84    { return _M_target->name(); }
85
86  private:
87    const type_info* _M_target;
88  };
89
90  template<typename _Tp> struct hash;
91
92  /// std::hash specialization for type_index.
93  template<>
94    struct hash<type_index>
95    {
96      typedef size_t        result_type;
97      typedef type_index  argument_type;
98
99      size_t
100      operator()(const type_index& __ti) const noexcept
101      { return __ti.hash_code(); }
102    };
103
104_GLIBCXX_END_NAMESPACE_VERSION
105} // namespace
106
107#endif  // __GXX_EXPERIMENTAL_CXX0X__
108
109#endif  // _GLIBCXX_TYPEINDEX
110