/usr/include/linbox/element/abstract.h is in liblinbox-dev 1.1.6~rc0-4.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 | /* -*- mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* linbox/element/abstract.h
* Copyright (C) 1999-2001 William J Turner,
* 2001 Bradford Hovinen
*
* Written by William J Turner <wjturner@math.ncsu.edu>,
* Bradford Hovinen <hovinen@cis.udel.edu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __ELEMENT_ABSTRACT_H
#define __ELEMENT_ABSTRACT_H
namespace LinBox
{
/** \brief Abstract element base class, a technicality.
* The element class of \ref{FieldAbstract}.
* This element has no knowledge of the field to which it belongs.
* All operations and functions requiring knolwedge of the field,
* such as addition and other arithmetic operations, are supplied
* by the field and not the element class.
\ingroup element
*/
class ElementAbstract
{
public:
/** Virtual copy constructor.
* Required because constructors cannot be virtual.
* Passes construction on to derived classes.
* Purely virtual.
* @return pointer to new ElementAbstract object in dynamic memory.
*/
virtual ElementAbstract *clone (void) const = 0;
/** Assignment operator.
* Purely virtual.
* @param x constant reference to ElementAbstract object
* @return reference to self
*/
virtual ElementAbstract &operator= (const ElementAbstract &x) = 0;
/** Destructor.
*/
virtual ~ElementAbstract (void) {}
protected:
/** Default Constructor.
* Required by derived classes, but protected because this class should
* never be constructed by itself.
*/
ElementAbstract (void) {}
}; // class ElementAbstract
} // namespace LinBox
#endif // __ELEMENT_ABSTRACT_H
|