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 <__config> 49#include <__functional/unary_function.h> 50#include <typeinfo> 51#include <version> 52 53// standard-mandated includes 54#include <compare> 55 56#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 57# pragma GCC system_header 58#endif 59 60_LIBCPP_BEGIN_NAMESPACE_STD 61 62class _LIBCPP_TEMPLATE_VIS type_index { 63 const type_info* __t_; 64 65public: 66 _LIBCPP_HIDE_FROM_ABI type_index(const type_info& __y) _NOEXCEPT : __t_(&__y) {} 67 68 _LIBCPP_HIDE_FROM_ABI bool operator==(const type_index& __y) const _NOEXCEPT { return *__t_ == *__y.__t_; } 69#if _LIBCPP_STD_VER <= 17 70 _LIBCPP_HIDE_FROM_ABI bool operator!=(const type_index& __y) const _NOEXCEPT { return *__t_ != *__y.__t_; } 71#endif 72 _LIBCPP_HIDE_FROM_ABI bool operator<(const type_index& __y) const _NOEXCEPT { return __t_->before(*__y.__t_); } 73 _LIBCPP_HIDE_FROM_ABI bool operator<=(const type_index& __y) const _NOEXCEPT { return !__y.__t_->before(*__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 !__t_->before(*__y.__t_); } 76#if _LIBCPP_STD_VER >= 20 77 _LIBCPP_HIDE_FROM_ABI strong_ordering operator<=>(const type_index& __y) const noexcept { 78 if (*__t_ == *__y.__t_) 79 return strong_ordering::equal; 80 if (__t_->before(*__y.__t_)) 81 return strong_ordering::less; 82 return strong_ordering::greater; 83 } 84#endif 85 86 _LIBCPP_HIDE_FROM_ABI size_t hash_code() const _NOEXCEPT { return __t_->hash_code(); } 87 _LIBCPP_HIDE_FROM_ABI const char* name() const _NOEXCEPT { return __t_->name(); } 88}; 89 90template <class _Tp> 91struct _LIBCPP_TEMPLATE_VIS hash; 92 93template <> 94struct _LIBCPP_TEMPLATE_VIS hash<type_index> : public __unary_function<type_index, size_t> { 95 _LIBCPP_HIDE_FROM_ABI size_t operator()(type_index __index) const _NOEXCEPT { return __index.hash_code(); } 96}; 97 98_LIBCPP_END_NAMESPACE_STD 99 100#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20 101# include <iosfwd> 102# include <new> 103# include <utility> 104#endif 105 106#endif // _LIBCPP_TYPEINDEX 107