The C and C++ Include Header Files

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


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

     1	// cxxabi.h subset for cancellation -*- C++ -*-
     2	  
     3	// Copyright (C) 2007-2021 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/cxxabi_forced.h
    27	 *  This is an internal header file, included by other library headers.
    28	 *  Do not attempt to use it directly. @headername{cxxabi.h}
    29	 */
    30	
    31	#ifndef _CXXABI_FORCED_H
    32	#define _CXXABI_FORCED_H 1
    33	
    34	#pragma GCC system_header
    35	
    36	#pragma GCC visibility push(default)
    37	
    38	#ifdef __cplusplus
    39	namespace __cxxabiv1
    40	{  
    41	  /** 
    42	   *  @brief Thrown as part of forced unwinding.
    43	   *  @ingroup exceptions
    44	   *
    45	   *  A magic placeholder class that can be caught by reference to
    46	   *  recognize forced unwinding.
    47	   */
    48	  class __forced_unwind
    49	  {
    50	    virtual ~__forced_unwind() throw();
    51	
    52	    // Prevent catch by value.
    53	    virtual void __pure_dummy() = 0; 
    54	  };
    55	}
    56	#endif // __cplusplus
    57	
    58	#pragma GCC visibility pop
    59	
    60	#endif // __CXXABI_FORCED_H