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