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 virtual ~type_info();
113 #if defined(_LIBCPP_HAS_NONUNIQUE_TYPEINFO)
114 _LIBCPP_INLINE_VISIBILITY
115 const char* name() const _NOEXCEPT
117 return reinterpret_cast<const char*>(__type_name &
118 ~_LIBCPP_NONUNIQUE_RTTI_BIT);
121 _LIBCPP_INLINE_VISIBILITY
122 bool before(const type_info& __arg) const _NOEXCEPT
124 if (!((__type_name & __arg.__type_name) & _LIBCPP_NONUNIQUE_RTTI_BIT))
125 return __type_name < __arg.__type_name;
126 return __compare_nonunique_names(__arg) < 0;
129 _LIBCPP_INLINE_VISIBILITY
130 size_t hash_code() const _NOEXCEPT
132 if (!(__type_name & _LIBCPP_NONUNIQUE_RTTI_BIT))
135 const char* __ptr = name();
136 size_t __hash = 5381;
137 while (unsigned char __c = static_cast<unsigned char>(*__ptr++))
138 __hash = (__hash * 33) ^ __c;
142 _LIBCPP_INLINE_VISIBILITY
143 bool operator==(const type_info& __arg) const _NOEXCEPT
145 if (__type_name == __arg.__type_name)
148 if (!((__type_name & __arg.__type_name) & _LIBCPP_NONUNIQUE_RTTI_BIT))
150 return __compare_nonunique_names(__arg) == 0;
153 _LIBCPP_INLINE_VISIBILITY
154 const char* name() const _NOEXCEPT
155 { return __type_name; }
157 _LIBCPP_INLINE_VISIBILITY
158 bool before(const type_info& __arg) const _NOEXCEPT
159 { return __type_name < __arg.__type_name; }
161 _LIBCPP_INLINE_VISIBILITY
162 size_t hash_code() const _NOEXCEPT
163 { return reinterpret_cast<size_t>(__type_name); }
165 _LIBCPP_INLINE_VISIBILITY
166 bool operator==(const type_info& __arg) const _NOEXCEPT
167 { return __type_name == __arg.__type_name; }
170 _LIBCPP_INLINE_VISIBILITY
171 bool operator!=(const type_info& __arg) const _NOEXCEPT
172 { return !operator==(__arg); }
175 class _LIBCPP_EXCEPTION_ABI bad_cast
179 bad_cast() _NOEXCEPT;
180 virtual ~bad_cast() _NOEXCEPT;
181 virtual const char* what() const _NOEXCEPT;
184 class _LIBCPP_EXCEPTION_ABI bad_typeid
188 bad_typeid() _NOEXCEPT;
189 virtual ~bad_typeid() _NOEXCEPT;
190 virtual const char* what() const _NOEXCEPT;
193 #endif // !_LIBCPP_ABI_MICROSOFT
197 _LIBCPP_BEGIN_NAMESPACE_STD
198 _LIBCPP_NORETURN inline _LIBCPP_ALWAYS_INLINE
199 void __throw_bad_cast()
201 #ifndef _LIBCPP_NO_EXCEPTIONS
207 _LIBCPP_END_NAMESPACE_STD
209 #endif // __LIBCPP_TYPEINFO