libstdc++
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00001 // C++11 <typeindex> -*- C++ -*- 00002 00003 // Copyright (C) 2010-2015 Free Software Foundation, Inc. 00004 // 00005 // This file is part of the GNU ISO C++ Library. This library is free 00006 // software; you can redistribute it and/or modify it under the 00007 // terms of the GNU General Public License as published by the 00008 // Free Software Foundation; either version 3, or (at your option) 00009 // any later version. 00010 00011 // This library is distributed in the hope that it will be useful, 00012 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 // GNU General Public License for more details. 00015 00016 // Under Section 7 of GPL version 3, you are granted additional 00017 // permissions described in the GCC Runtime Library Exception, version 00018 // 3.1, as published by the Free Software Foundation. 00019 00020 // You should have received a copy of the GNU General Public License and 00021 // a copy of the GCC Runtime Library Exception along with this program; 00022 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00023 // <http://www.gnu.org/licenses/>. 00024 00025 /** @file include/typeindex 00026 * This is a Standard C++ Library header. 00027 */ 00028 00029 #ifndef _GLIBCXX_TYPEINDEX 00030 #define _GLIBCXX_TYPEINDEX 1 00031 00032 #pragma GCC system_header 00033 00034 #if __cplusplus < 201103L 00035 # include <bits/c++0x_warning.h> 00036 #else 00037 00038 #include <typeinfo> 00039 00040 namespace std _GLIBCXX_VISIBILITY(default) 00041 { 00042 _GLIBCXX_BEGIN_NAMESPACE_VERSION 00043 00044 /** 00045 * @brief Class type_index 00046 * @ingroup utilities 00047 * 00048 * The class type_index provides a simple wrapper for type_info 00049 * which can be used as an index type in associative containers 00050 * (23.6) and in unordered associative containers (23.7). 00051 */ 00052 struct type_index 00053 { 00054 type_index(const type_info& __rhs) noexcept 00055 : _M_target(&__rhs) { } 00056 00057 bool 00058 operator==(const type_index& __rhs) const noexcept 00059 { return *_M_target == *__rhs._M_target; } 00060 00061 bool 00062 operator!=(const type_index& __rhs) const noexcept 00063 { return *_M_target != *__rhs._M_target; } 00064 00065 bool 00066 operator<(const type_index& __rhs) const noexcept 00067 { return _M_target->before(*__rhs._M_target); } 00068 00069 bool 00070 operator<=(const type_index& __rhs) const noexcept 00071 { return !__rhs._M_target->before(*_M_target); } 00072 00073 bool 00074 operator>(const type_index& __rhs) const noexcept 00075 { return __rhs._M_target->before(*_M_target); } 00076 00077 bool 00078 operator>=(const type_index& __rhs) const noexcept 00079 { return !_M_target->before(*__rhs._M_target); } 00080 00081 size_t 00082 hash_code() const noexcept 00083 { return _M_target->hash_code(); } 00084 00085 const char* 00086 name() const noexcept 00087 { return _M_target->name(); } 00088 00089 private: 00090 const type_info* _M_target; 00091 }; 00092 00093 template<typename _Tp> struct hash; 00094 00095 /// std::hash specialization for type_index. 00096 template<> 00097 struct hash<type_index> 00098 { 00099 typedef size_t result_type; 00100 typedef type_index argument_type; 00101 00102 size_t 00103 operator()(const type_index& __ti) const noexcept 00104 { return __ti.hash_code(); } 00105 }; 00106 00107 _GLIBCXX_END_NAMESPACE_VERSION 00108 } // namespace std 00109 00110 #endif // C++11 00111 00112 #endif // _GLIBCXX_TYPEINDEX