libstdc++-v3/libsupc++/cxxabi-forced.h

   1 // cxxabi.h subset for inclusion by other library headers -*- C++ -*-
   2
   3 // Copyright (C) 2007 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 2, 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 // You should have received a copy of the GNU General Public License
  18 // along with GCC; see the file COPYING.  If not, write to
  19 // the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  20 // Boston, MA 02110-1301, USA.
  21
  22 // As a special exception, you may use this file as part of a free software
  23 // library without restriction.  Specifically, if other files instantiate
  24 // templates or use macros or inline functions from this file, or you compile
  25 // this file and link it with other files to produce an executable, this
  26 // file does not by itself cause the resulting executable to be covered by
  27 // the GNU General Public License.  This exception does not however
  28 // invalidate any other reasons why the executable file might be covered by
  29 // the GNU General Public License.
  30
  31 #ifndef _CXXABI_FORCED_H
  32 #define _CXXABI_FORCED_H 1
  33
  34 #pragma GCC visibility push(default)
  35
  36 #ifdef __cplusplus
  37 namespace __cxxabiv1
  38 {
  39   // A magic placeholder class that can be caught by reference
  40   // to recognize forced unwinding.
  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