1 // Methods for type_info for -*- C++ -*- Run Time Type Identification. 2 // Copyright (C) 1994-2018 Free Software Foundation, Inc. 3 // 4 // This file is part of GCC. 5 // 6 // GCC is free software; you can redistribute it and/or modify 7 // it under the terms of the GNU General Public License as published by 8 // the Free Software Foundation; either version 3, or (at your option) 9 // any later version. 10 11 // GCC is distributed in the hope that it will be useful, 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 // GNU General Public License for more details. 15 16 // Under Section 7 of GPL version 3, you are granted additional 17 // permissions described in the GCC Runtime Library Exception, version 18 // 3.1, as published by the Free Software Foundation. 19 20 // You should have received a copy of the GNU General Public License and 21 // a copy of the GCC Runtime Library Exception along with this program; 22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23 // <http://www.gnu.org/licenses/>. 24 25 #include <bits/c++config.h> 26 #include <cstddef> 27 #include "tinfo.h" 28 29 std::type_info:: 30 ~type_info () 31 { } 32 33 #if !__GXX_TYPEINFO_EQUALITY_INLINE 34 35 // We can't rely on common symbols being shared between shared objects. 36 bool std::type_info:: 37 operator== (const std::type_info& arg) const _GLIBCXX_NOEXCEPT 38 { 39 #if __GXX_MERGED_TYPEINFO_NAMES 40 return name () == arg.name (); 41 #else 42 /* The name() method will strip any leading '*' prefix. Therefore 43 take care to look at __name rather than name() when looking for 44 the "pointer" prefix. */ 45 return (&arg == this) 46 || (__name[0] != '*' && (__builtin_strcmp (name (), arg.name ()) == 0)); 47 #endif 48 } 49 50 #endif 51 52 namespace std { 53 54 // return true if this is a type_info for a pointer type 55 bool type_info:: 56 __is_pointer_p () const 57 { 58 return false; 59 } 60 61 // return true if this is a type_info for a function type 62 bool type_info:: 63 __is_function_p () const 64 { 65 return false; 66 } 67 68 // try and catch a thrown object. 69 bool type_info:: 70 __do_catch (const type_info *thr_type, void **, unsigned) const 71 { 72 return *this == *thr_type; 73 } 74 75 // upcast from this type to the target. __class_type_info will override 76 bool type_info:: 77 __do_upcast (const abi::__class_type_info *, void **) const 78 { 79 return false; 80 } 81 82 } 83