1// Exception Handling support header for -*- C++ -*- 
2 
3// Copyright (C) 1995-2019 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 exception 
27 * This is a Standard C++ Library header. 
28 */ 
29 
30#ifndef __EXCEPTION__ 
31#define __EXCEPTION__ 
32 
33#pragma GCC system_header 
34 
35#pragma GCC visibility push(default) 
36 
37#include <bits/c++config.h> 
38#include <bits/exception.h> 
39 
40extern "C++" { 
41 
42namespace std 
43{ 
44 /** If an %exception is thrown which is not listed in a function's 
45 * %exception specification, one of these may be thrown. */ 
46 class bad_exception : public exception 
47 { 
48 public: 
49 bad_exception() _GLIBCXX_USE_NOEXCEPT { } 
50 
51 // This declaration is not useless: 
52 // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118 
53 virtual ~bad_exception() _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_USE_NOEXCEPT; 
54 
55 // See comment in eh_exception.cc. 
56 virtual const char* 
57 what() const _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_USE_NOEXCEPT; 
58 }; 
59 
60 /// If you write a replacement %terminate handler, it must be of this type. 
61 typedef void (*terminate_handler) (); 
62 
63 /// If you write a replacement %unexpected handler, it must be of this type. 
64 typedef void (*unexpected_handler) (); 
65 
66 /// Takes a new handler function as an argument, returns the old function. 
67 terminate_handler set_terminate(terminate_handler) _GLIBCXX_USE_NOEXCEPT; 
68 
69#if __cplusplus >= 201103L 
70 /// Return the current terminate handler. 
71 terminate_handler get_terminate() noexcept; 
72#endif 
73 
74 /** The runtime will call this function if %exception handling must be 
75 * abandoned for any reason. It can also be called by the user. */ 
76 void terminate() _GLIBCXX_USE_NOEXCEPT __attribute__ ((__noreturn__)); 
77 
78 /// Takes a new handler function as an argument, returns the old function. 
79 unexpected_handler set_unexpected(unexpected_handler) _GLIBCXX_USE_NOEXCEPT; 
80 
81#if __cplusplus >= 201103L 
82 /// Return the current unexpected handler. 
83 unexpected_handler get_unexpected() noexcept; 
84#endif 
85 
86 /** The runtime will call this function if an %exception is thrown which 
87 * violates the function's %exception specification. */ 
88 void unexpected() __attribute__ ((__noreturn__)); 
89 
90 /** [18.6.4]/1: 'Returns true after completing evaluation of a 
91 * throw-expression until either completing initialization of the 
92 * exception-declaration in the matching handler or entering @c unexpected() 
93 * due to the throw; or after entering @c terminate() for any reason 
94 * other than an explicit call to @c terminate(). [Note: This includes 
95 * stack unwinding [15.2]. end note]' 
96 * 
97 * 2: 'When @c uncaught_exception() is true, throwing an 
98 * %exception can result in a call of @c terminate() 
99 * (15.5.1).' 
100 */ 
101 _GLIBCXX17_DEPRECATED 
102 bool uncaught_exception() _GLIBCXX_USE_NOEXCEPT __attribute__ ((__pure__)); 
103 
104#if __cplusplus >= 201703L || !defined(__STRICT_ANSI__) // c++17 or gnu++98 
105#define __cpp_lib_uncaught_exceptions 201411L 
106 /// The number of uncaught exceptions. 
107 int uncaught_exceptions() _GLIBCXX_USE_NOEXCEPT __attribute__ ((__pure__)); 
108#endif 
109 
110 // @} group exceptions 
111} // namespace std 
112 
113namespace __gnu_cxx 
114{ 
115_GLIBCXX_BEGIN_NAMESPACE_VERSION 
116 
117 /** 
118 * @brief A replacement for the standard terminate_handler which 
119 * prints more information about the terminating exception (if any) 
120 * on stderr. 
121 * 
122 * @ingroup exceptions 
123 * 
124 * Call 
125 * @code 
126 * std::set_terminate(__gnu_cxx::__verbose_terminate_handler) 
127 * @endcode 
128 * to use. For more info, see 
129 * http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt02ch06s02.html 
130 * 
131 * In 3.4 and later, this is on by default. 
132 */ 
133 void __verbose_terminate_handler(); 
134 
135_GLIBCXX_END_NAMESPACE_VERSION 
136} // namespace 
137 
138} // extern "C++" 
139 
140#pragma GCC visibility pop 
141 
142#if (__cplusplus >= 201103L) 
143#include <bits/exception_ptr.h> 
144#include <bits/nested_exception.h> 
145#endif 
146 
147#endif 
148