1 // Exception Handling support header for -*- C++ -*- 2 3 // Copyright (C) 2016-2021 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 bits/exception.h 27 * This is an internal header file, included by other library headers. 28 * Do not attempt to use it directly. 29 */ 30 31 #ifndef __EXCEPTION_H 32 #define __EXCEPTION_H 1 33 34 #pragma GCC system_header 35 36 #pragma GCC visibility push(default) 37 38 #include <bits/c++config.h> 39 40 extern "C++" { 41 42 namespace std 43 { 44 /** 45 * @defgroup exceptions Exceptions 46 * @ingroup diagnostics 47 * @since C++98 48 * 49 * Classes and functions for reporting errors via exceptions. 50 * @{ 51 */ 52 53 /** 54 * @brief Base class for all library exceptions. 55 * 56 * This is the base class for all exceptions thrown by the standard 57 * library, and by certain language expressions. You are free to derive 58 * your own %exception classes, or use a different hierarchy, or to 59 * throw non-class data (e.g., fundamental types). 60 */ 61 class exception 62 { 63 public: exception()64 exception() _GLIBCXX_NOTHROW { } 65 virtual ~exception() _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_NOTHROW; 66 #if __cplusplus >= 201103L 67 exception(const exception&) = default; 68 exception& operator=(const exception&) = default; 69 exception(exception&&) = default; 70 exception& operator=(exception&&) = default; 71 #endif 72 73 /** Returns a C-style character string describing the general cause 74 * of the current error. */ 75 virtual const char* 76 what() const _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_NOTHROW; 77 }; 78 79 /// @} 80 81 } // namespace std 82 83 } 84 85 #pragma GCC visibility pop 86 87 #endif 88