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      1 // cxxabi.h subset for inclusion by other library headers -*- C++ -*-
      2 
      3 // Copyright (C) 2007, 2009 Free Software Foundation, Inc.
      4 //
      5 // This file is part of GCC.
      6 //
      7 // GCC is free software; you can redistribute it and/or modify
      8 // it under the terms of the GNU General Public License as published by
      9 // the Free Software Foundation; either version 3, or (at your option)
     10 // any later version.
     11 //
     12 // GCC is distributed in the hope that it will be useful,
     13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
     14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     15 // GNU General Public License for more details.
     16 //
     17 // Under Section 7 of GPL version 3, you are granted additional
     18 // permissions described in the GCC Runtime Library Exception, version
     19 // 3.1, as published by the Free Software Foundation.
     20 
     21 // You should have received a copy of the GNU General Public License and
     22 // a copy of the GCC Runtime Library Exception along with this program;
     23 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
     24 // <http://www.gnu.org/licenses/>.
     25 
     26 #ifndef _CXXABI_FORCED_H
     27 #define _CXXABI_FORCED_H 1
     28 
     29 #pragma GCC visibility push(default)
     30 
     31 #ifdef __cplusplus
     32 namespace __cxxabiv1
     33 {
     34   /**
     35    *  @brief Thrown as part of forced unwinding.
     36    *  @ingroup exceptions
     37    *
     38    *  A magic placeholder class that can be caught by reference to
     39    *  recognize forced unwinding.
     40    */
     41   class __forced_unwind
     42   {
     43     virtual ~__forced_unwind() throw();
     44     virtual void __pure_dummy() = 0; // prevent catch by value
     45   };
     46 }
     47 #endif // __cplusplus
     48 
     49 #pragma GCC visibility pop
     50 
     51 #endif // __CXXABI_FORCED_H
     52