Filename: //usr/include//c++/10/typeindex

// C++11 <typeindex> -*- C++ -*- // Copyright (C) 2010-2020 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 3, or (at your option) // any later version. // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License and // a copy of the GCC Runtime Library Exception along with this program; // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see // <http://www.gnu.org/licenses/>. /** @file include/typeindex * This is a Standard C++ Library header. */ #ifndef _GLIBCXX_TYPEINDEX #define _GLIBCXX_TYPEINDEX 1 #pragma GCC system_header #if __cplusplus < 201103L # include <bits/c++0x_warning.h> #else #include <typeinfo> #if __cplusplus > 201703L # include <compare> #endif namespace std _GLIBCXX_VISIBILITY(default) { _GLIBCXX_BEGIN_NAMESPACE_VERSION /** * @brief Class type_index * @ingroup utilities * * The class type_index provides a simple wrapper for type_info * which can be used as an index type in associative containers * (23.6) and in unordered associative containers (23.7). */ struct type_index { type_index(const type_info& __rhs) noexcept : _M_target(&__rhs) { } bool operator==(const type_index& __rhs) const noexcept { return *_M_target == *__rhs._M_target; } #if ! __cpp_lib_three_way_comparison bool operator!=(const type_index& __rhs) const noexcept { return *_M_target != *__rhs._M_target; } #endif bool operator<(const type_index& __rhs) const noexcept { return _M_target->before(*__rhs._M_target); } bool operator<=(const type_index& __rhs) const noexcept { return !__rhs._M_target->before(*_M_target); } bool operator>(const type_index& __rhs) const noexcept { return __rhs._M_target->before(*_M_target); } bool operator>=(const type_index& __rhs) const noexcept { return !_M_target->before(*__rhs._M_target); } #if __cpp_lib_three_way_comparison strong_ordering operator<=>(const type_index& __rhs) const noexcept { if (*_M_target == *__rhs._M_target) return strong_ordering::equal; if (_M_target->before(*__rhs._M_target)) return strong_ordering::less; return strong_ordering::greater; } #endif size_t hash_code() const noexcept { return _M_target->hash_code(); } const char* name() const noexcept { return _M_target->name(); } private: const type_info* _M_target; }; template<typename _Tp> struct hash; /// std::hash specialization for type_index. template<> struct hash<type_index> { typedef size_t result_type; typedef type_index argument_type; size_t operator()(const type_index& __ti) const noexcept { return __ti.hash_code(); } }; _GLIBCXX_END_NAMESPACE_VERSION } // namespace std #endif // C++11 #endif // _GLIBCXX_TYPEINDEX

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