1// -*- C++ -*- 2//===----------------------------------------------------------------------===// 3// 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5// See https://llvm.org/LICENSE.txt for license information. 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP_TYPEINDEX 11#define _LIBCPP_TYPEINDEX 12 13/* 14 15 typeindex synopsis 16 17namespace std 18{ 19 20class type_index 21{ 22public: 23 type_index(const type_info& rhs) noexcept; 24 25 bool operator==(const type_index& rhs) const noexcept; 26 bool operator!=(const type_index& rhs) const noexcept; // removed in C++20 27 bool operator< (const type_index& rhs) const noexcept; 28 bool operator<=(const type_index& rhs) const noexcept; 29 bool operator> (const type_index& rhs) const noexcept; 30 bool operator>=(const type_index& rhs) const noexcept; 31 strong_ordering operator<=>(const type_index& rhs) const noexcept; // C++20 32 33 size_t hash_code() const noexcept; 34 const char* name() const noexcept; 35}; 36 37template <> 38struct hash<type_index> 39 : public unary_function<type_index, size_t> 40{ 41 size_t operator()(type_index index) const noexcept; 42}; 43 44} // std 45 46*/ 47 48#include <__assert> // all public C++ headers provide the assertion handler 49#include <__config> 50#include <__functional/unary_function.h> 51#include <typeinfo> 52#include <version> 53 54// standard-mandated includes 55#include <compare> 56 57#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 58# pragma GCC system_header 59#endif 60 61_LIBCPP_BEGIN_NAMESPACE_STD 62 63class _LIBCPP_TEMPLATE_VIS type_index { 64 const type_info* __t_; 65 66public: 67 _LIBCPP_HIDE_FROM_ABI type_index(const type_info& __y) _NOEXCEPT : __t_(&__y) {} 68 69 _LIBCPP_HIDE_FROM_ABI bool operator==(const type_index& __y) const _NOEXCEPT { return *__t_ == *__y.__t_; } 70#if _LIBCPP_STD_VER <= 17 71 _LIBCPP_HIDE_FROM_ABI bool operator!=(const type_index& __y) const _NOEXCEPT { return *__t_ != *__y.__t_; } 72#endif 73 _LIBCPP_HIDE_FROM_ABI bool operator<(const type_index& __y) const _NOEXCEPT { return __t_->before(*__y.__t_); } 74 _LIBCPP_HIDE_FROM_ABI bool operator<=(const type_index& __y) const _NOEXCEPT { return !__y.__t_->before(*__t_); } 75 _LIBCPP_HIDE_FROM_ABI bool operator>(const type_index& __y) const _NOEXCEPT { return __y.__t_->before(*__t_); } 76 _LIBCPP_HIDE_FROM_ABI bool operator>=(const type_index& __y) const _NOEXCEPT { return !__t_->before(*__y.__t_); } 77#if _LIBCPP_STD_VER >= 20 78 _LIBCPP_HIDE_FROM_ABI strong_ordering operator<=>(const type_index& __y) const noexcept { 79 if (*__t_ == *__y.__t_) 80 return strong_ordering::equal; 81 if (__t_->before(*__y.__t_)) 82 return strong_ordering::less; 83 return strong_ordering::greater; 84 } 85#endif 86 87 _LIBCPP_HIDE_FROM_ABI size_t hash_code() const _NOEXCEPT { return __t_->hash_code(); } 88 _LIBCPP_HIDE_FROM_ABI const char* name() const _NOEXCEPT { return __t_->name(); } 89}; 90 91template <class _Tp> 92struct _LIBCPP_TEMPLATE_VIS hash; 93 94template <> 95struct _LIBCPP_TEMPLATE_VIS hash<type_index> : public __unary_function<type_index, size_t> { 96 _LIBCPP_HIDE_FROM_ABI size_t operator()(type_index __index) const _NOEXCEPT { return __index.hash_code(); } 97}; 98 99_LIBCPP_END_NAMESPACE_STD 100 101#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 102# include <iosfwd> 103# include <new> 104# include <utility> 105#endif 106 107#endif // _LIBCPP_TYPEINDEX 108