libstdc++-v3/libsupc++/exception_defines.h

   1 // -fno-exceptions Support -*- C++ -*-
   2
   3 // Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2006, 2007, 2008, 2009,
   4 // 2011
   5 // Free Software Foundation, Inc.
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 3, or (at your option)
  11 // any later version.
  12
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // Under Section 7 of GPL version 3, you are granted additional
  19 // permissions described in the GCC Runtime Library Exception, version
  20 // 3.1, as published by the Free Software Foundation.
  21
  22 // You should have received a copy of the GNU General Public License and
  23 // a copy of the GCC Runtime Library Exception along with this program;
  24 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  25 // <http://www.gnu.org/licenses/>.
  26
  27 /** @file bits/exception_defines.h
  28  *  This is an internal header file, included by other library headers.
  29  *  Do not attempt to use it directly. @headername{exception}
  30  */
  31
  32 #ifndef _EXCEPTION_DEFINES_H
  33 #define _EXCEPTION_DEFINES_H 1
  34
  35 #ifndef __EXCEPTIONS
  36 // Iff -fno-exceptions, transform error handling code to work without it.
  37 # define __try      if (true)
  38 # define __catch(X) if (false)
  39 # define __throw_exception_again
  40 #else
  41 // Else proceed normally.
  42 # define __try      try
  43 # define __catch(X) catch(X)
  44 # define __throw_exception_again throw
  45 #endif
  46
  47 #endif