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  1. // Copyright (C) 1994-2015 Free Software Foundation, Inc.
  2. //
  3. // This file is part of GCC.
  4. //
  5. // GCC is free software; you can redistribute it and/or modify
  6. // it under the terms of the GNU General Public License as published by
  7. // the Free Software Foundation; either version 3, or (at your option)
  8. // any later version.
  9.  
  10. // GCC is distributed in the hope that it will be useful,
  11. // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12. // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13. // GNU General Public License for more details.
  14.  
  15. // Under Section 7 of GPL version 3, you are granted additional
  16. // permissions described in the GCC Runtime Library Exception, version
  17. // 3.1, as published by the Free Software Foundation.
  18.  
  19. // You should have received a copy of the GNU General Public License and
  20. // a copy of the GCC Runtime Library Exception along with this program;
  21. // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  22. // <http://www.gnu.org/licenses/>.
  23.  
  24. #include "tinfo.h"
  25.  
  26. namespace __cxxabiv1 {
  27.  
  28. __pbase_type_info::
  29. ~__pbase_type_info ()
  30. {}
  31.  
  32. bool __pbase_type_info::
  33. __do_catch (const type_info *thr_type,
  34.             void **thr_obj,
  35.             unsigned outer) const
  36. {
  37.   if (*this == *thr_type)
  38.     return true;      // same type
  39.  
  40. #if __cpp_rtti
  41.   if (typeid (*this) != typeid (*thr_type))
  42.     return false;     // not both same kind of pointers
  43. #endif
  44.  
  45.   if (!(outer & 1))
  46.     // We're not the same and our outer pointers are not all const qualified
  47.     // Therefore there must at least be a qualification conversion involved
  48.     // But for that to be valid, our outer pointers must be const qualified.
  49.     return false;
  50.  
  51.   const __pbase_type_info *thrown_type =
  52.     static_cast <const __pbase_type_info *> (thr_type);
  53.  
  54.   if (thrown_type->__flags & ~__flags)
  55.     // We're less qualified.
  56.     return false;
  57.  
  58.   if (!(__flags & __const_mask))
  59.     outer &= ~1;
  60.  
  61.   return __pointer_catch (thrown_type, thr_obj, outer);
  62. }
  63.  
  64. }
  65.