/* BreakableBlock Copyright (C) 1998-2002 Jochen Hoenicke.
 *
 * This program 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, 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.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; see the file COPYING.LESSER.  If not, write to
 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * $Id$
 */

package net.sf.jode.flow;

/**
 * This is a structured block, that supports break.  
 */
public interface BreakableBlock {

    /**
     * Returns the label of this block and creates a new label, if
     * there wasn't a label previously.
     */
    public String getLabel();

    /**
     * Is called by BreakBlock, to tell us that this block is breaked.
     */
    public void setBreaked();

    /**
     * Is called by BreakBlock, to tell us what the stack can be after a
     * break.
     * @param stack the stack at the break.
     */
    public void mergeBreakedStack(VariableStack stack);
}