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The C and C++ Include Header Files

/usr/include/c++/11/bits/exception.h


$ cat -n /usr/include/c++/11/bits/exception.h

     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:
    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