/* Copyright (C) 2008  Hugh McGuire   http://www.cis.gvsu.edu/~mcguire/
 *                     Grand Valley State University, MI  49401-9403
 */
/*
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 3
of the License, or (at your option) any later version.

This program 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 General Public License for more details.

For a copy of the GNU General Public License, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth floor, Boston, MA  02110-1301, USA.
Another option as of January 1, 2008 is to browse the following URL:
    http://www.gnu.org/copyleft/gpl.html
*/



/**
 * Parent 'class' for <CODE>Expression</CODE> and <CODE>Symbol</CODE>:
 * commonalities for those classes.
 * @author Hugh McGuire
 */
interface Grammar_Construct extends Cloneable {
    int get_begin();
    int get_limit();
    boolean equivalent_form(Grammar_Construct other_gc);
    void context_shift(int increment);
    }