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;
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
32    size_t hash_code() const noexcept;
33    const char* name() const noexcept;
34};
35
36template <>
37struct hash<type_index>
38    : public unary_function<type_index, size_t>
39{
40    size_t operator()(type_index index) const noexcept;
41};
42
43}  // std
44
45*/
46
47#include <__assert> // all public C++ headers provide the assertion handler
48#include <__config>
49#include <__functional/unary_function.h>
50#include <typeinfo>
51#include <version>
52
53#ifndef _LIBCPP_REMOVE_TRANSITIVE_INCLUDES
54#  include <iosfwd>
55#  include <new>
56#  include <utility>
57#endif
58
59// standard-mandated includes
60#include <compare>
61
62#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
63#  pragma GCC system_header
64#endif
65
66_LIBCPP_BEGIN_NAMESPACE_STD
67
68class _LIBCPP_TEMPLATE_VIS type_index
69{
70    const type_info* __t_;
71public:
72    _LIBCPP_INLINE_VISIBILITY
73    type_index(const type_info& __y) _NOEXCEPT : __t_(&__y) {}
74
75    _LIBCPP_INLINE_VISIBILITY
76    bool operator==(const type_index& __y) const _NOEXCEPT
77        {return *__t_ == *__y.__t_;}
78    _LIBCPP_INLINE_VISIBILITY
79    bool operator!=(const type_index& __y) const _NOEXCEPT
80        {return *__t_ != *__y.__t_;}
81    _LIBCPP_INLINE_VISIBILITY
82    bool operator< (const type_index& __y) const _NOEXCEPT
83        {return  __t_->before(*__y.__t_);}
84    _LIBCPP_INLINE_VISIBILITY
85    bool operator<=(const type_index& __y) const _NOEXCEPT
86        {return !__y.__t_->before(*__t_);}
87    _LIBCPP_INLINE_VISIBILITY
88    bool operator> (const type_index& __y) const _NOEXCEPT
89        {return  __y.__t_->before(*__t_);}
90    _LIBCPP_INLINE_VISIBILITY
91    bool operator>=(const type_index& __y) const _NOEXCEPT
92        {return !__t_->before(*__y.__t_);}
93
94    _LIBCPP_INLINE_VISIBILITY
95    size_t hash_code() const _NOEXCEPT {return __t_->hash_code();}
96    _LIBCPP_INLINE_VISIBILITY
97    const char* name() const _NOEXCEPT {return __t_->name();}
98};
99
100template <class _Tp> struct _LIBCPP_TEMPLATE_VIS hash;
101
102template <>
103struct _LIBCPP_TEMPLATE_VIS hash<type_index>
104    : public __unary_function<type_index, size_t>
105{
106    _LIBCPP_INLINE_VISIBILITY
107    size_t operator()(type_index __index) const _NOEXCEPT
108        {return __index.hash_code();}
109};
110
111_LIBCPP_END_NAMESPACE_STD
112
113#endif // _LIBCPP_TYPEINDEX
114