Where Online Learning is simpler!
The C and C++ Include Header Files
cat -n /usr/include/c++/15/exception
1 // Exception Handling support header for -*- C++ -*- 2 3 // Copyright (C) 1995-2025 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 #ifdef _GLIBCXX_SYSHDR 34 #pragma GCC system_header 35 #endif 36 37 #include <bits/c++config.h> 38 #include <bits/exception.h> 39 40 #define __glibcxx_want_uncaught_exceptions 41 #include <bits/version.h> 42 43 extern "C++" { 44 45 namespace std _GLIBCXX_VISIBILITY(default) 46 { 47 /** @addtogroup exceptions 48 * @{ 49 */ 50 51 /** If an %exception is thrown which is not listed in a function's 52 * %exception specification, one of these may be thrown. 53 * 54 * @ingroup exceptions 55 */ 56 class bad_exception : public exception 57 { 58 public: 59 bad_exception() _GLIBCXX_USE_NOEXCEPT { } 60 61 // This declaration is not useless: 62 // http://gcc.gnu.org/onlinedocs/gcc-3.0.2/gcc_6.html#SEC118 63 virtual ~bad_exception() _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_USE_NOEXCEPT; 64 65 // See comment in eh_exception.cc. 66 virtual const char* 67 what() const _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_USE_NOEXCEPT; 68 }; 69 70 /// If you write a replacement %terminate handler, it must be of this type. 71 typedef void (*terminate_handler) (); 72 73 /// Takes a new handler function as an argument, returns the old function. 74 terminate_handler set_terminate(terminate_handler) _GLIBCXX_USE_NOEXCEPT; 75 76 #if __cplusplus >= 201103L 77 /// Return the current terminate handler. 78 terminate_handler get_terminate() noexcept; 79 #endif 80 81 /** The runtime will call this function if %exception handling must be 82 * abandoned for any reason. It can also be called by the user. */ 83 void terminate() _GLIBCXX_USE_NOEXCEPT __attribute__ ((__noreturn__,__cold__)); 84 85 #if __cplusplus < 201703L || (__cplusplus <= 202002L && _GLIBCXX_USE_DEPRECATED) 86 /// If you write a replacement %unexpected handler, it must be of this type. 87 typedef void (*_GLIBCXX11_DEPRECATED unexpected_handler) (); 88 89 /** Takes a new handler function as an argument, returns the old function. 90 * 91 * @deprecated Removed from the C++ standard in C++17 92 */ 93 _GLIBCXX11_DEPRECATED 94 unexpected_handler set_unexpected(unexpected_handler) _GLIBCXX_USE_NOEXCEPT; 95 96 #if __cplusplus >= 201103L 97 /** Return the current unexpected handler. 98 * 99 * @since C++11 100 * @deprecated Removed from the C++ standard in C++17 101 */ 102 _GLIBCXX11_DEPRECATED 103 unexpected_handler get_unexpected() noexcept; 104 #endif 105 106 /** The runtime will call this function if an %exception is thrown which 107 * violates the function's %exception specification. 108 * 109 * @deprecated Removed from the C++ standard in C++17 110 */ 111 _GLIBCXX11_DEPRECATED 112 void unexpected() __attribute__ ((__noreturn__,__cold__)); 113 #endif 114 115 /** [18.6.4]/1: 'Returns true after completing evaluation of a 116 * throw-expression until either completing initialization of the 117 * exception-declaration in the matching handler or entering `unexpected()` 118 * due to the throw; or after entering `terminate()` for any reason 119 * other than an explicit call to `terminate()`. [Note: This includes 120 * stack unwinding [15.2]. end note]' 121 * 122 * 2: 'When `uncaught_exception()` is true, throwing an 123 * %exception can result in a call of 1terminate()` 124 * (15.5.1).' 125 */ 126 _GLIBCXX17_DEPRECATED_SUGGEST("std::uncaught_exceptions()") 127 bool uncaught_exception() _GLIBCXX_USE_NOEXCEPT __attribute__ ((__pure__)); 128 129 #ifdef __cpp_lib_uncaught_exceptions // C++ >= 17 || GNU++ >= 03 130 /** The number of uncaught exceptions. 131 * @since C++17, or any non-strict mode, e.g. `-std=gnu++98` 132 * @see uncaught_exception() 133 */ 134 int uncaught_exceptions() _GLIBCXX_USE_NOEXCEPT __attribute__ ((__pure__)); 135 #endif 136 137 /// @} group exceptions 138 } // namespace std 139 140 namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) 141 { 142 _GLIBCXX_BEGIN_NAMESPACE_VERSION 143 144 /** 145 * @brief A replacement for the standard terminate_handler which 146 * prints more information about the terminating exception (if any) 147 * on stderr. 148 * 149 * @ingroup exceptions 150 * 151 * Call 152 * @code 153 * std::set_terminate(__gnu_cxx::__verbose_terminate_handler) 154 * @endcode 155 * to use. For more info, see 156 * http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt02ch06s02.html 157 * 158 * In 3.4 and later, this is on by default. 159 */ 160 void __verbose_terminate_handler(); 161 162 _GLIBCXX_END_NAMESPACE_VERSION 163 } // namespace 164 165 } // extern "C++" 166 167 #if (__cplusplus >= 201103L) 168 #include <bits/exception_ptr.h> 169 #include <bits/nested_exception.h> 170 #endif 171 172 #endif
