libstdc++
exception.h
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1 // Exception Handling support header for -*- C++ -*-
2 
3 // Copyright (C) 2016-2024 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/exception.h
27  * This is an internal header file, included by other library headers.
28  * Do not attempt to use it directly.
29  */
30 
31 #ifndef __EXCEPTION_H
32 #define __EXCEPTION_H 1
33 
34 #pragma GCC system_header
35 
36 #include <bits/c++config.h>
37 
38 extern "C++" {
39 
40 namespace std _GLIBCXX_VISIBILITY(default)
41 {
42  /**
43  * @defgroup exceptions Exceptions
44  * @ingroup diagnostics
45  * @since C++98
46  *
47  * Classes and functions for reporting errors via exceptions.
48  * @{
49  */
50 
51  /**
52  * @brief Base class for all library exceptions.
53  *
54  * This is the base class for all exceptions thrown by the standard
55  * library, and by certain language expressions. You are free to derive
56  * your own %exception classes, or use a different hierarchy, or to
57  * throw non-class data (e.g., fundamental types).
58  */
59  class exception
60  {
61  public:
62  exception() _GLIBCXX_NOTHROW { }
63  virtual ~exception() _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_NOTHROW;
64 #if __cplusplus >= 201103L
65  exception(const exception&) = default;
66  exception& operator=(const exception&) = default;
67  exception(exception&&) = default;
68  exception& operator=(exception&&) = default;
69 #endif
70 
71  /** Returns a C-style character string describing the general cause
72  * of the current error. */
73  virtual const char*
74  what() const _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_NOTHROW;
75  };
76 
77  /// @}
78 
79 } // namespace std
80 
81 }
82 
83 #endif
ISO C++ entities toplevel namespace is std.
Base class for all library exceptions.
Definition: exception.h:60
virtual const char * what() const noexcept