1// Exception Handling support header for -*- C++ -*- 2 3// Copyright (C) 1995-2022 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 /** @addtogroup exceptions 45 * @{ 46 */ 47 48 /** If an %exception is thrown which is not listed in a function's 49 * %exception specification, one of these may be thrown. 50 * 51 * @ingroup exceptions 52 */ 53 class bad_exception : public exception 54 { 55 public: 56 bad_exception() _GLIBCXX_USE_NOEXCEPT { } 57 58 // This declaration is not useless: 59 // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118 60 virtual ~bad_exception() _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_USE_NOEXCEPT; 61 62 // See comment in eh_exception.cc. 63 virtual const char* 64 what() const _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_USE_NOEXCEPT; 65 }; 66 67 /// If you write a replacement %terminate handler, it must be of this type. 68 typedef void (*terminate_handler) (); 69 70 /// Takes a new handler function as an argument, returns the old function. 71 terminate_handler set_terminate(terminate_handler) _GLIBCXX_USE_NOEXCEPT; 72 73#if __cplusplus >= 201103L 74 /// Return the current terminate handler. 75 terminate_handler get_terminate() noexcept; 76#endif 77 78 /** The runtime will call this function if %exception handling must be 79 * abandoned for any reason. It can also be called by the user. */ 80 void terminate() _GLIBCXX_USE_NOEXCEPT __attribute__ ((__noreturn__)); 81 82#if __cplusplus < 201703L || (__cplusplus <= 202002L && _GLIBCXX_USE_DEPRECATED) 83 /// If you write a replacement %unexpected handler, it must be of this type. 84 typedef void (*_GLIBCXX11_DEPRECATED unexpected_handler) (); 85 86 /** Takes a new handler function as an argument, returns the old function. 87 * 88 * @deprecated Removed from the C++ standard in C++17 89 */ 90 _GLIBCXX11_DEPRECATED 91 unexpected_handler set_unexpected(unexpected_handler) _GLIBCXX_USE_NOEXCEPT; 92 93#if __cplusplus >= 201103L 94 /** Return the current unexpected handler. 95 * 96 * @since C++11 97 * @deprecated Removed from the C++ standard in C++17 98 */ 99 _GLIBCXX11_DEPRECATED 100 unexpected_handler get_unexpected() noexcept; 101#endif 102 103 /** The runtime will call this function if an %exception is thrown which 104 * violates the function's %exception specification. 105 * 106 * @deprecated Removed from the C++ standard in C++17 107 */ 108 _GLIBCXX11_DEPRECATED 109 void unexpected() __attribute__ ((__noreturn__)); 110#endif 111 112 /** [18.6.4]/1: 'Returns true after completing evaluation of a 113 * throw-expression until either completing initialization of the 114 * exception-declaration in the matching handler or entering `unexpected()` 115 * due to the throw; or after entering `terminate()` for any reason 116 * other than an explicit call to `terminate()`. [Note: This includes 117 * stack unwinding [15.2]. end note]' 118 * 119 * 2: 'When `uncaught_exception()` is true, throwing an 120 * %exception can result in a call of 1terminate()` 121 * (15.5.1).' 122 */ 123 _GLIBCXX17_DEPRECATED_SUGGEST("std::uncaught_exceptions()") 124 bool uncaught_exception() _GLIBCXX_USE_NOEXCEPT __attribute__ ((__pure__)); 125 126#if __cplusplus >= 201703L || !defined(__STRICT_ANSI__) // c++17 or gnu++98 127#define __cpp_lib_uncaught_exceptions 201411L 128 /** The number of uncaught exceptions. 129 * @since C++17, or any non-strict mode, e.g. `-std=gnu++98` 130 * @see uncaught_exception() 131 */ 132 int uncaught_exceptions() _GLIBCXX_USE_NOEXCEPT __attribute__ ((__pure__)); 133#endif 134 135 /// @} group exceptions 136} // namespace std 137 138namespace __gnu_cxx 139{ 140_GLIBCXX_BEGIN_NAMESPACE_VERSION 141 142 /** 143 * @brief A replacement for the standard terminate_handler which 144 * prints more information about the terminating exception (if any) 145 * on stderr. 146 * 147 * @ingroup exceptions 148 * 149 * Call 150 * @code 151 * std::set_terminate(__gnu_cxx::__verbose_terminate_handler) 152 * @endcode 153 * to use. For more info, see 154 * http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt02ch06s02.html 155 * 156 * In 3.4 and later, this is on by default. 157 */ 158 void __verbose_terminate_handler(); 159 160_GLIBCXX_END_NAMESPACE_VERSION 161} // namespace 162 163} // extern "C++" 164 165#pragma GCC visibility pop 166 167#if (__cplusplus >= 201103L) 168#include <bits/exception_ptr.h> 169#include <bits/nested_exception.h> 170#endif 171 172#endif 173