1 // C++0x typeindex -*- C++ -*- 2 3 // Copyright (C) 2010 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 40 namespace 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) 52 : _M_target(&__rhs) { } 53 54 bool 55 operator==(const type_index& __rhs) const 56 { return *_M_target == *__rhs._M_target; } 57 58 bool 59 operator!=(const type_index& __rhs) const 60 { return *_M_target != *__rhs._M_target; } 61 62 bool 63 operator<(const type_index& __rhs) const 64 { return _M_target->before(*__rhs._M_target); } 65 66 bool 67 operator<=(const type_index& __rhs) const 68 { return !__rhs._M_target->before(*_M_target); } 69 70 bool 71 operator>(const type_index& __rhs) const 72 { return __rhs._M_target->before(*_M_target); } 73 74 bool 75 operator>=(const type_index& __rhs) const 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
