1  // -fno-exceptions Support -*- C++ -*-
       2  
       3  // Copyright (C) 2001-2023 Free Software Foundation, Inc.
       4  //
       5  // This file is part of the GNU ISO C++ Library.  This library is free
       6  // software; you can redistribute it and/or modify it under the
       7  // terms of the GNU General Public License as published by the
       8  // Free Software Foundation; either version 3, or (at your option)
       9  // any later version.
      10  
      11  // This library 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  /** @file bits/exception_defines.h
      26   *  This is an internal header file, included by other library headers.
      27   *  Do not attempt to use it directly. @headername{exception}
      28   */
      29  
      30  #ifndef _EXCEPTION_DEFINES_H
      31  #define _EXCEPTION_DEFINES_H 1
      32  
      33  #if ! __cpp_exceptions
      34  // Iff -fno-exceptions, transform error handling code to work without it.
      35  # define __try      if (true)
      36  # define __catch(X) if (false)
      37  # define __throw_exception_again
      38  #else
      39  // Else proceed normally.
      40  # define __try      try
      41  # define __catch(X) catch(X)
      42  # define __throw_exception_again throw
      43  #endif
      44  
      45  #endif