2 //===-------------------------- typeinfo ----------------------------------===//
4 // The LLVM Compiler Infrastructure
6 // This file is dual licensed under the MIT and the University of Illinois Open
7 // Source Licenses. See LICENSE.TXT for details.
9 //===----------------------------------------------------------------------===//
11 #ifndef __LIBCPP_TYPEINFO
12 #define __LIBCPP_TYPEINFO
25 bool operator==(const type_info& rhs) const noexcept;
26 bool operator!=(const type_info& rhs) const noexcept;
28 bool before(const type_info& rhs) const noexcept;
29 size_t hash_code() const noexcept;
30 const char* name() const noexcept;
32 type_info(const type_info& rhs) = delete;
33 type_info& operator=(const type_info& rhs) = delete;
41 bad_cast(const bad_cast&) noexcept;
42 bad_cast& operator=(const bad_cast&) noexcept;
43 virtual const char* what() const noexcept;
50 bad_typeid() noexcept;
51 bad_typeid(const bad_typeid&) noexcept;
52 bad_typeid& operator=(const bad_typeid&) noexcept;
53 virtual const char* what() const noexcept;
64 #ifdef _LIBCPP_NO_EXCEPTIONS
68 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
69 #pragma GCC system_header
72 #if defined(_LIBCPP_ABI_MICROSOFT)
73 #include <vcruntime_typeinfo.h>
74 #elif defined(_LIBCPP_NONUNIQUE_RTTI_BIT)
75 #define _LIBCPP_HAS_NONUNIQUE_TYPEINFO
77 #define _LIBCPP_HAS_UNIQUE_TYPEINFO
80 namespace std // purposefully not using versioning namespace
83 #if !defined(_LIBCPP_ABI_MICROSOFT)
84 class _LIBCPP_EXCEPTION_ABI type_info
86 type_info& operator=(const type_info&);
87 type_info(const type_info&);
89 #if defined(_LIBCPP_HAS_NONUNIQUE_TYPEINFO)
90 _LIBCPP_INLINE_VISIBILITY
91 int __compare_nonunique_names(const type_info &__arg) const _NOEXCEPT
92 { return __builtin_strcmp(name(), __arg.name()); }
96 #if defined(_LIBCPP_HAS_NONUNIQUE_TYPEINFO)
97 // A const char* with the non-unique RTTI bit possibly set.
98 uintptr_t __type_name;
100 _LIBCPP_INLINE_VISIBILITY
101 explicit type_info(const char* __n)
102 : __type_name(reinterpret_cast<uintptr_t>(__n)) {}
104 const char *__type_name;
106 _LIBCPP_INLINE_VISIBILITY
107 explicit type_info(const char* __n) : __type_name(__n) {}
111 _LIBCPP_AVAILABILITY_TYPEINFO_VTABLE
112 virtual ~type_info();
114 #if defined(_LIBCPP_HAS_NONUNIQUE_TYPEINFO)
115 _LIBCPP_INLINE_VISIBILITY
116 const char* name() const _NOEXCEPT
118 return reinterpret_cast<const char*>(__type_name &
119 ~_LIBCPP_NONUNIQUE_RTTI_BIT);
122 _LIBCPP_INLINE_VISIBILITY
123 bool before(const type_info& __arg) const _NOEXCEPT
125 if (!((__type_name & __arg.__type_name) & _LIBCPP_NONUNIQUE_RTTI_BIT))
126 return __type_name < __arg.__type_name;
127 return __compare_nonunique_names(__arg) < 0;
130 _LIBCPP_INLINE_VISIBILITY
131 size_t hash_code() const _NOEXCEPT
133 if (!(__type_name & _LIBCPP_NONUNIQUE_RTTI_BIT))
136 const char* __ptr = name();
137 size_t __hash = 5381;
138 while (unsigned char __c = static_cast<unsigned char>(*__ptr++))
139 __hash = (__hash * 33) ^ __c;
143 _LIBCPP_INLINE_VISIBILITY
144 bool operator==(const type_info& __arg) const _NOEXCEPT
146 if (__type_name == __arg.__type_name)
149 if (!((__type_name & __arg.__type_name) & _LIBCPP_NONUNIQUE_RTTI_BIT))
151 return __compare_nonunique_names(__arg) == 0;
154 _LIBCPP_INLINE_VISIBILITY
155 const char* name() const _NOEXCEPT
156 { return __type_name; }
158 _LIBCPP_INLINE_VISIBILITY
159 bool before(const type_info& __arg) const _NOEXCEPT
160 { return __type_name < __arg.__type_name; }
162 _LIBCPP_INLINE_VISIBILITY
163 size_t hash_code() const _NOEXCEPT
164 { return reinterpret_cast<size_t>(__type_name); }
166 _LIBCPP_INLINE_VISIBILITY
167 bool operator==(const type_info& __arg) const _NOEXCEPT
168 { return __type_name == __arg.__type_name; }
171 _LIBCPP_INLINE_VISIBILITY
172 bool operator!=(const type_info& __arg) const _NOEXCEPT
173 { return !operator==(__arg); }
176 class _LIBCPP_EXCEPTION_ABI bad_cast
180 bad_cast() _NOEXCEPT;
181 virtual ~bad_cast() _NOEXCEPT;
182 virtual const char* what() const _NOEXCEPT;
185 class _LIBCPP_EXCEPTION_ABI bad_typeid
189 bad_typeid() _NOEXCEPT;
190 virtual ~bad_typeid() _NOEXCEPT;
191 virtual const char* what() const _NOEXCEPT;
194 #endif // !_LIBCPP_ABI_MICROSOFT
198 _LIBCPP_BEGIN_NAMESPACE_STD
199 _LIBCPP_NORETURN inline _LIBCPP_ALWAYS_INLINE
200 void __throw_bad_cast()
202 #ifndef _LIBCPP_NO_EXCEPTIONS
208 _LIBCPP_END_NAMESPACE_STD
210 #endif // __LIBCPP_TYPEINFO