1 // Exception Handling support header for -*- C++ -*-
3 // Copyright (C) 1995-2022 Free Software Foundation, Inc.
5 // This file is part of GCC.
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)
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.
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.
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/>.
27 * This is a Standard C++ Library header.
33 #pragma GCC system_header
35 #include <bits/c++config.h>
36 #include <bits/exception.h>
40 namespace std _GLIBCXX_VISIBILITY(default)
42 /** @addtogroup exceptions
46 /** If an %exception is thrown which is not listed in a function's
47 * %exception specification, one of these may be thrown.
51 class bad_exception : public exception
54 bad_exception() _GLIBCXX_USE_NOEXCEPT { }
56 // This declaration is not useless:
57 // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118
58 virtual ~bad_exception() _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_USE_NOEXCEPT;
60 // See comment in eh_exception.cc.
62 what() const _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_USE_NOEXCEPT;
65 /// If you write a replacement %terminate handler, it must be of this type.
66 typedef void (*terminate_handler) ();
68 /// Takes a new handler function as an argument, returns the old function.
69 terminate_handler set_terminate(terminate_handler) _GLIBCXX_USE_NOEXCEPT;
71 #if __cplusplus >= 201103L
72 /// Return the current terminate handler.
73 terminate_handler get_terminate() noexcept;
76 /** The runtime will call this function if %exception handling must be
77 * abandoned for any reason. It can also be called by the user. */
78 void terminate() _GLIBCXX_USE_NOEXCEPT __attribute__ ((__noreturn__));
80 #if __cplusplus < 201703L || (__cplusplus <= 202002L && _GLIBCXX_USE_DEPRECATED)
81 /// If you write a replacement %unexpected handler, it must be of this type.
82 typedef void (*_GLIBCXX11_DEPRECATED unexpected_handler) ();
84 /** Takes a new handler function as an argument, returns the old function.
86 * @deprecated Removed from the C++ standard in C++17
89 unexpected_handler set_unexpected(unexpected_handler) _GLIBCXX_USE_NOEXCEPT;
91 #if __cplusplus >= 201103L
92 /** Return the current unexpected handler.
95 * @deprecated Removed from the C++ standard in C++17
98 unexpected_handler get_unexpected() noexcept;
101 /** The runtime will call this function if an %exception is thrown which
102 * violates the function's %exception specification.
104 * @deprecated Removed from the C++ standard in C++17
106 _GLIBCXX11_DEPRECATED
107 void unexpected() __attribute__ ((__noreturn__));
110 /** [18.6.4]/1: 'Returns true after completing evaluation of a
111 * throw-expression until either completing initialization of the
112 * exception-declaration in the matching handler or entering `unexpected()`
113 * due to the throw; or after entering `terminate()` for any reason
114 * other than an explicit call to `terminate()`. [Note: This includes
115 * stack unwinding [15.2]. end note]'
117 * 2: 'When `uncaught_exception()` is true, throwing an
118 * %exception can result in a call of 1terminate()`
121 _GLIBCXX17_DEPRECATED_SUGGEST("std::uncaught_exceptions()")
122 bool uncaught_exception() _GLIBCXX_USE_NOEXCEPT __attribute__ ((__pure__));
124 #if __cplusplus >= 201703L || !defined(__STRICT_ANSI__) // c++17 or gnu++98
125 #define __cpp_lib_uncaught_exceptions 201411L
126 /** The number of uncaught exceptions.
127 * @since C++17, or any non-strict mode, e.g. `-std=gnu++98`
128 * @see uncaught_exception()
130 int uncaught_exceptions() _GLIBCXX_USE_NOEXCEPT __attribute__ ((__pure__));
133 /// @} group exceptions
136 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
138 _GLIBCXX_BEGIN_NAMESPACE_VERSION
141 * @brief A replacement for the standard terminate_handler which
142 * prints more information about the terminating exception (if any)
145 * @ingroup exceptions
149 * std::set_terminate(__gnu_cxx::__verbose_terminate_handler)
151 * to use. For more info, see
152 * http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt02ch06s02.html
154 * In 3.4 and later, this is on by default.
156 void __verbose_terminate_handler();
158 _GLIBCXX_END_NAMESPACE_VERSION
163 #if (__cplusplus >= 201103L)
164 #include <bits/exception_ptr.h>
165 #include <bits/nested_exception.h>