| // -*- C++ -*- |
| //===-------------------------- typeinfo ----------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef __LIBCPP_TYPEINFO |
| #define __LIBCPP_TYPEINFO |
| |
| /* |
| |
| typeinfo synopsis |
| |
| namespace std { |
| |
| class type_info |
| { |
| public: |
| virtual ~type_info(); |
| |
| bool operator==(const type_info& rhs) const noexcept; |
| bool operator!=(const type_info& rhs) const noexcept; |
| |
| bool before(const type_info& rhs) const noexcept; |
| size_t hash_code() const noexcept; |
| const char* name() const noexcept; |
| |
| type_info(const type_info& rhs) = delete; |
| type_info& operator=(const type_info& rhs) = delete; |
| }; |
| |
| class bad_cast |
| : public exception |
| { |
| public: |
| bad_cast() noexcept; |
| bad_cast(const bad_cast&) noexcept; |
| bad_cast& operator=(const bad_cast&) noexcept; |
| virtual const char* what() const noexcept; |
| }; |
| |
| class bad_typeid |
| : public exception |
| { |
| public: |
| bad_typeid() noexcept; |
| bad_typeid(const bad_typeid&) noexcept; |
| bad_typeid& operator=(const bad_typeid&) noexcept; |
| virtual const char* what() const noexcept; |
| }; |
| |
| } // std |
| |
| */ |
| |
| #include <__config> |
| #include <exception> |
| #include <cstddef> |
| #include <cstdint> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| #pragma GCC system_header |
| #endif |
| |
| namespace std // purposefully not using versioning namespace |
| { |
| |
| class _LIBCPP_EXCEPTION_ABI type_info |
| { |
| type_info& operator=(const type_info&); |
| type_info(const type_info&); |
| protected: |
| #ifndef _LIBCPP_NONUNIQUE_RTTI_BIT |
| const char* __type_name; |
| #else |
| // A const char* with the non-unique RTTI bit possibly set. |
| uintptr_t __type_name; |
| #endif |
| |
| _LIBCPP_INLINE_VISIBILITY |
| explicit type_info(const char* __n) |
| #ifndef _LIBCPP_NONUNIQUE_RTTI_BIT |
| : __type_name(__n) {} |
| #else |
| : __type_name(reinterpret_cast<uintptr_t>(__n)) {} |
| #endif |
| |
| public: |
| virtual ~type_info(); |
| |
| _LIBCPP_INLINE_VISIBILITY |
| const char* name() const _NOEXCEPT |
| #ifndef _LIBCPP_NONUNIQUE_RTTI_BIT |
| {return __type_name;} |
| #else |
| {return reinterpret_cast<const char*>(__type_name & ~_LIBCPP_NONUNIQUE_RTTI_BIT);} |
| #endif |
| |
| _LIBCPP_INLINE_VISIBILITY |
| bool before(const type_info& __arg) const _NOEXCEPT |
| #ifndef _LIBCPP_NONUNIQUE_RTTI_BIT |
| {return __type_name < __arg.__type_name;} |
| #else |
| {if (!((__type_name & __arg.__type_name) & _LIBCPP_NONUNIQUE_RTTI_BIT)) |
| return __type_name < __arg.__type_name; |
| return __compare_nonunique_names(__arg) < 0;} |
| #endif |
| |
| _LIBCPP_INLINE_VISIBILITY |
| size_t hash_code() const _NOEXCEPT |
| #ifndef _LIBCPP_NONUNIQUE_RTTI_BIT |
| {return *reinterpret_cast<const size_t*>(&__type_name);} |
| #else |
| {if (!(__type_name & _LIBCPP_NONUNIQUE_RTTI_BIT)) return __type_name; |
| const char *__ptr = name(); |
| size_t __hash = 5381; |
| while (unsigned char __c = static_cast<unsigned char>(*__ptr++)) |
| __hash = (__hash * 33) ^ __c; |
| return __hash;} |
| #endif |
| |
| _LIBCPP_INLINE_VISIBILITY |
| bool operator==(const type_info& __arg) const _NOEXCEPT |
| #ifndef _LIBCPP_NONUNIQUE_RTTI_BIT |
| {return __type_name == __arg.__type_name;} |
| #else |
| {if (__type_name == __arg.__type_name) return true; |
| if (!((__type_name & __arg.__type_name) & _LIBCPP_NONUNIQUE_RTTI_BIT)) |
| return false; |
| return __compare_nonunique_names(__arg) == 0;} |
| #endif |
| _LIBCPP_INLINE_VISIBILITY |
| bool operator!=(const type_info& __arg) const _NOEXCEPT |
| {return !operator==(__arg);} |
| |
| #ifdef _LIBCPP_NONUNIQUE_RTTI_BIT |
| private: |
| _LIBCPP_INLINE_VISIBILITY |
| int __compare_nonunique_names(const type_info &__arg) const _NOEXCEPT |
| {return __builtin_strcmp(name(), __arg.name());} |
| #endif |
| }; |
| |
| class _LIBCPP_EXCEPTION_ABI bad_cast |
| : public exception |
| { |
| public: |
| bad_cast() _NOEXCEPT; |
| virtual ~bad_cast() _NOEXCEPT; |
| virtual const char* what() const _NOEXCEPT; |
| }; |
| |
| class _LIBCPP_EXCEPTION_ABI bad_typeid |
| : public exception |
| { |
| public: |
| bad_typeid() _NOEXCEPT; |
| virtual ~bad_typeid() _NOEXCEPT; |
| virtual const char* what() const _NOEXCEPT; |
| }; |
| |
| } // std |
| |
| #endif // __LIBCPP_TYPEINFO |