libstdc++

cxxabi_forced.h
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1 // cxxabi.h subset for cancellation -*- C++ -*-
2
3 // Copyright (C) 2007-2013 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 /** @file bits/cxxabi_forced.h
27 * This is an internal header file, included by other library headers.
28 * Do not attempt to use it directly. @headername{cxxabi.h}
29 */
30
31 #ifndef _CXXABI_FORCED_H
32 #define _CXXABI_FORCED_H 1
33
34 #pragma GCC system_header
35
36 #pragma GCC visibility push(default)
37
38 #ifdef __cplusplus
39 namespace __cxxabiv1
40 {
41 /**
42 * @brief Thrown as part of forced unwinding.
43 * @ingroup exceptions
44 *
45 * A magic placeholder class that can be caught by reference to
46 * recognize forced unwinding.
47 */
48 class __forced_unwind
49 {
50 virtual ~__forced_unwind() throw();
51
52 // Prevent catch by value.
53 virtual void __pure_dummy() = 0;
54 };
55 }
56 #endif // __cplusplus
57
58 #pragma GCC visibility pop
59
60 #endif // __CXXABI_FORCED_H