1// C++11 <typeindex> -*- C++ -*- 2 3// Copyright (C) 2010-2018 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#if __cplusplus < 201103L 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 Class type_index 46 * @ingroup utilities 47 * 48 * The class type_index provides a simple wrapper for type_info 49 * which can be used as an index type in associative containers 50 * (23.6) and in unordered associative containers (23.7). 51 */ 52 struct type_index 53 { 54 type_index(const type_info& __rhs) noexcept 55 : _M_target(&__rhs) { } 56 57 bool 58 operator==(const type_index& __rhs) const noexcept 59 { return *_M_target == *__rhs._M_target; } 60 61 bool 62 operator!=(const type_index& __rhs) const noexcept 63 { return *_M_target != *__rhs._M_target; } 64 65 bool 66 operator<(const type_index& __rhs) const noexcept 67 { return _M_target->before(*__rhs._M_target); } 68 69 bool 70 operator<=(const type_index& __rhs) const noexcept 71 { return !__rhs._M_target->before(*_M_target); } 72 73 bool 74 operator>(const type_index& __rhs) const noexcept 75 { return __rhs._M_target->before(*_M_target); } 76 77 bool 78 operator>=(const type_index& __rhs) const noexcept 79 { return !_M_target->before(*__rhs._M_target); } 80 81 size_t 82 hash_code() const noexcept 83 { return _M_target->hash_code(); } 84 85 const char* 86 name() const noexcept 87 { return _M_target->name(); } 88 89 private: 90 const type_info* _M_target; 91 }; 92 93 template<typename _Tp> struct hash; 94 95 /// std::hash specialization for type_index. 96 template<> 97 struct hash<type_index> 98 { 99 typedef size_t result_type; 100 typedef type_index argument_type; 101 102 size_t 103 operator()(const type_index& __ti) const noexcept 104 { return __ti.hash_code(); } 105 }; 106 107_GLIBCXX_END_NAMESPACE_VERSION 108} // namespace std 109 110#endif // C++11 111 112#endif // _GLIBCXX_TYPEINDEX 113