// $Id: GraphNode.C,v 1.8 1999/08/19 11:27:32 andreas Exp $
// GraphNode class

// Copyright (C) 1995 Technische Universitaet Braunschweig, Germany.
// Written by Andreas Zeller <zeller@gnu.org>.
// 
// This file is part of DDD.
// 
// DDD 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 2 of the License, or (at your option) any later version.
// 
// DDD 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 General Public
// License along with DDD -- see the file COPYING.
// If not, write to the Free Software Foundation, Inc.,
// 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// 
// DDD is the data display debugger.
// For details, see the DDD World-Wide-Web page, 
// `http://www.gnu.org/software/ddd/',
// or send a mail to the DDD developers <ddd@gnu.org>.

char GraphNode_rcsid[] = 
    "$Id: GraphNode.C,v 1.8 1999/08/19 11:27:32 andreas Exp $";

#ifdef __GNUG__
#pragma implementation
#pragma implementation "GraphNodeI.h"
#endif


#include "GraphNode.h"

DEFINE_TYPE_INFO_0(GraphNode)

// Representation invariant
bool GraphNode::OK() const
{
    GraphEdge *e;

    // check nodes
    for (e = firstFrom(); e != 0; e = nextFrom(e))
	assert(e->from() == this);

    for (e = firstTo(); e != 0; e = nextTo(e))
	assert(e->to() == this);

    return true;
}
