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73 lines
1.9 KiB
73 lines
1.9 KiB
/* NopOperator Copyright (C) 1998-2002 Jochen Hoenicke.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; see the file COPYING.LESSER. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id$
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*/
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package net.sf.jode.expr;
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import net.sf.jode.type.Type;
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import net.sf.jode.decompiler.TabbedPrintWriter;
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/**
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* A NopOperator takes one arguments and returns it again. It is used
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* as placeholder when the real operator is not yet known (e.g. in
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* SwitchBlock, but also in every other Operator).
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*
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* A Nop operator doesn't have subExpressions; getSubExpressions() simply
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* returns zero.
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*
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* @author Jochen Hoenicke */
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public class NopOperator extends Expression {
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public NopOperator(Type type) {
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super(type);
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}
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public int getFreeOperandCount() {
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return 1;
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}
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public int getPriority() {
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return 1000;
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}
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public void updateSubTypes() {
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}
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public void updateType() {
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}
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public Expression addOperand(Expression op) {
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op.setType(type);
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op.parent = parent;
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return op;
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}
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public boolean isConstant() {
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return false;
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}
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public boolean equals(Object o) {
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return (o instanceof NopOperator);
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}
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public Expression simplify() {
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return this;
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}
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public void dumpExpression(TabbedPrintWriter writer)
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throws java.io.IOException {
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writer.print("POP");
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}
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}
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