1 // Exception Handling support header for -*- C++ -*-
3 // Copyright (C) 1995-2016 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 #pragma GCC visibility push(default)
37 #include <bits/c++config.h>
38 #include <bits/atomic_lockfree_defines.h>
39 #include <bits/exception.h>
45 /** If an %exception is thrown which is not listed in a function's
46 * %exception specification, one of these may be thrown. */
47 class bad_exception : public exception
50 bad_exception() _GLIBCXX_USE_NOEXCEPT { }
52 // This declaration is not useless:
53 // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118
54 virtual ~bad_exception() _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_USE_NOEXCEPT;
56 // See comment in eh_exception.cc.
58 what() const _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_USE_NOEXCEPT;
61 /// If you write a replacement %terminate handler, it must be of this type.
62 typedef void (*terminate_handler) ();
64 /// If you write a replacement %unexpected handler, it must be of this type.
65 typedef void (*unexpected_handler) ();
67 /// Takes a new handler function as an argument, returns the old function.
68 terminate_handler set_terminate(terminate_handler) _GLIBCXX_USE_NOEXCEPT;
70 #if __cplusplus >= 201103L
71 /// Return the current terminate handler.
72 terminate_handler get_terminate() noexcept;
75 /** The runtime will call this function if %exception handling must be
76 * abandoned for any reason. It can also be called by the user. */
77 void terminate() _GLIBCXX_USE_NOEXCEPT __attribute__ ((__noreturn__));
79 /// Takes a new handler function as an argument, returns the old function.
80 unexpected_handler set_unexpected(unexpected_handler) _GLIBCXX_USE_NOEXCEPT;
82 #if __cplusplus >= 201103L
83 /// Return the current unexpected handler.
84 unexpected_handler get_unexpected() noexcept;
87 /** The runtime will call this function if an %exception is thrown which
88 * violates the function's %exception specification. */
89 void unexpected() __attribute__ ((__noreturn__));
91 /** [18.6.4]/1: 'Returns true after completing evaluation of a
92 * throw-expression until either completing initialization of the
93 * exception-declaration in the matching handler or entering @c unexpected()
94 * due to the throw; or after entering @c terminate() for any reason
95 * other than an explicit call to @c terminate(). [Note: This includes
96 * stack unwinding [15.2]. end note]'
98 * 2: 'When @c uncaught_exception() is true, throwing an
99 * %exception can result in a call of @c terminate()
102 bool uncaught_exception() _GLIBCXX_USE_NOEXCEPT __attribute__ ((__pure__));
104 #if __cplusplus > 201402L || !defined(__STRICT_ANSI__) // c++1z or gnu++98
105 #define __cpp_lib_uncaught_exceptions 201411
106 /// The number of uncaught exceptions.
107 int uncaught_exceptions() _GLIBCXX_USE_NOEXCEPT __attribute__ ((__pure__));
110 // @} group exceptions
115 _GLIBCXX_BEGIN_NAMESPACE_VERSION
118 * @brief A replacement for the standard terminate_handler which
119 * prints more information about the terminating exception (if any)
122 * @ingroup exceptions
126 * std::set_terminate(__gnu_cxx::__verbose_terminate_handler)
128 * to use. For more info, see
129 * http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt02ch06s02.html
131 * In 3.4 and later, this is on by default.
133 void __verbose_terminate_handler();
135 _GLIBCXX_END_NAMESPACE_VERSION
140 #pragma GCC visibility pop
142 #if (__cplusplus >= 201103L) && (ATOMIC_INT_LOCK_FREE > 1)
143 #include <bits/exception_ptr.h>
144 #include <bits/nested_exception.h>