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ConstNode.C
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1998-11-23
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// $Id: ConstNode.C,v 1.9 1998/11/23 17:43:20 zeller Exp $
// Constants
// 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>.
char ConstNode_rcsid[] =
"$Id: ConstNode.C,v 1.9 1998/11/23 17:43:20 zeller Exp $";
#ifdef __GNUG__
#pragma implementation
#endif
#include <iostream.h>
#include "assert.h"
#include "VSLLib.h"
#include "VSEFlags.h"
#include "VSLNode.h"
#include "ConstNode.h"
#include "ListBox.h"
#include "StringBox.h"
DEFINE_TYPE_INFO_1(ConstNode, VSLNode)
// ConstNode
// Evaluate
const Box *ConstNode::_eval(ListBox *) const
{
return _box->link();
}
// Dump
void ConstNode::dump(ostream& s) const
{
if (VSEFlags::include_const_info)
s << *_box;
else
s << "const_" << _box->id();
}
// ...as tree
void ConstNode::_dumpTree(ostream& s) const
{
bool old = StringBox::quoted;
StringBox::quoted = true;
s << "\"" << *_box << "\"";
StringBox::quoted = old;
}
// Check whether argument list can be used directly
bool ConstNode::isStraight() const
{
// Check for empty list
return (_box->isListBox() && ((ListBox *)_box)->isEmpty());
}
// Debugging
// Representation invariant
bool ConstNode::OK() const
{
assert (VSLNode::OK());
assert (_box && _box->OK());
return true;
}