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- // Methods for type_info for -*- C++ -*- Run Time Type Identification.
- // Copyright (C) 1994-2022 Free Software Foundation, Inc.
- //
- // This file is part of GCC.
- //
- // GCC is free software; you can redistribute it and/or modify
- // it under the terms of the GNU General Public License as published by
- // the Free Software Foundation; either version 3, or (at your option)
- // any later version.
- // GCC is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- // GNU General Public License for more details.
- // Under Section 7 of GPL version 3, you are granted additional
- // permissions described in the GCC Runtime Library Exception, version
- // 3.1, as published by the Free Software Foundation.
- // You should have received a copy of the GNU General Public License and
- // a copy of the GCC Runtime Library Exception along with this program;
- // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
- // <http://www.gnu.org/licenses/>.
- #include <bits/c++config.h>
- #include <cstddef>
- #include "tinfo.h"
- std::type_info::
- ~type_info ()
- { }
- #if !__GXX_TYPEINFO_EQUALITY_INLINE
- #if __cplusplus > 202002L
- # error "this file must be compiled with C++20 or older to define operator=="
- #endif
- // We can't rely on common symbols being shared between shared objects.
- bool std::type_info::
- operator== (const std::type_info& arg) const _GLIBCXX_NOEXCEPT
- {
- #if __GXX_MERGED_TYPEINFO_NAMES
- return name () == arg.name ();
- #else
- /* The name() method will strip any leading '*' prefix. Therefore
- take care to look at __name rather than name() when looking for
- the "pointer" prefix. */
- return (&arg == this)
- || (__name[0] != '*' && (__builtin_strcmp (name (), arg.name ()) == 0));
- #endif
- }
- bool
- std::type_info::__equal (const std::type_info& arg) const _GLIBCXX_NOEXCEPT
- __attribute__((alias("_ZNKSt9type_infoeqERKS_")));
- #endif
- namespace std {
- // return true if this is a type_info for a pointer type
- bool type_info::
- __is_pointer_p () const
- {
- return false;
- }
- // return true if this is a type_info for a function type
- bool type_info::
- __is_function_p () const
- {
- return false;
- }
- // try and catch a thrown object.
- bool type_info::
- __do_catch (const type_info *thr_type, void **, unsigned) const
- {
- return *this == *thr_type;
- }
- // upcast from this type to the target. __class_type_info will override
- bool type_info::
- __do_upcast (const abi::__class_type_info *, void **) const
- {
- return false;
- }
- }
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