1// -fno-exceptions Support -*- C++ -*- 
2 
3// Copyright (C) 2001-2019 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 
46