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DummyNode.h
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1998-11-23
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// $Id: DummyNode.h,v 1.10 1998/11/23 17:43:25 zeller Exp $
// A DummyNode returns a DummyBox
// Copyright (C) 1995 Technische Universitaet Braunschweig, Germany.
// Written by Andreas Zeller <zeller@ips.cs.tu-bs.de>.
//
// 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.cs.tu-bs.de/softech/ddd/',
// or send a mail to the DDD developers <ddd@ips.cs.tu-bs.de>.
#ifndef _DDD_DummyNode_h
#define _DDD_DummyNode_h
#ifdef __GNUG__
#pragma interface
#endif
// A DummyNode returns a DummyBox at run-time.
// A DummyNode matches all other nodes if `DummyNode::matchesAll' is true.
#include "assert.h"
#include <iostream.h>
#include "VSLNode.h"
#include "Box.h"
#include "DummyBox.h"
// DummyNode
class DummyNode: public VSLNode {
public:
DECLARE_TYPE_INFO
protected:
DummyNode(const DummyNode& node):
VSLNode(node)
{}
void dump(ostream& s) const
{
s << "_";
}
bool matches(const VSLNode& node) const
{
return matchesAll || VSLNode::matches(node);
}
public:
// Constructor
DummyNode(char *type = "DummyNode")
: VSLNode(type)
{}
// Copy
VSLNode *dup() const
{
return new DummyNode(*this);
}
const Box *_eval(ListBox *) const
{
return new DummyBox;
}
static bool matchesAll;
bool isConst() const { return true; }
bool isDummyNode() const { return true; }
};
#endif