| /* |
| * Copyright 2007 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| * use this file except in compliance with the License. You may obtain a copy of |
| * the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package com.google.gwt.dev.jjs.ast; |
| |
| import com.google.gwt.dev.jjs.SourceInfo; |
| |
| /** |
| * Java prefix or postfix operation expression. |
| */ |
| public abstract class JUnaryOperation extends JExpression { |
| |
| private JExpression arg; |
| private final JUnaryOperator op; |
| |
| public JUnaryOperation(SourceInfo info, JUnaryOperator op, JExpression arg) { |
| super(info); |
| this.op = op; |
| this.arg = arg; |
| } |
| |
| public JExpression getArg() { |
| return arg; |
| } |
| |
| public JUnaryOperator getOp() { |
| return op; |
| } |
| |
| @Override |
| public JType getType() { |
| // Unary operators don't change the type of their expression |
| return arg.getType(); |
| } |
| |
| @Override |
| public boolean hasSideEffects() { |
| return getOp().isModifying() || arg.hasSideEffects(); |
| } |
| |
| @Override |
| public void traverse(JVisitor visitor, Context ctx) { |
| if (getOp().isModifying()) { |
| arg = visitor.acceptLvalue(arg); |
| } else { |
| arg = visitor.accept(arg); |
| } |
| } |
| } |