com.google.gwt.dev.jjs.ast.JBinaryOperation Maven / Gradle / Ivy
/*
* 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;
/**
* Binary operator expression.
*/
public class JBinaryOperation extends JExpression {
private JExpression lhs;
private final JBinaryOperator op;
private JExpression rhs;
private JType type;
public JBinaryOperation(SourceInfo info, JType type, JBinaryOperator op, JExpression lhs,
JExpression rhs) {
super(info);
this.op = op;
this.type = type;
this.lhs = lhs;
this.rhs = rhs;
}
public JExpression getLhs() {
return lhs;
}
public JBinaryOperator getOp() {
return op;
}
public JExpression getRhs() {
return rhs;
}
@Override
public JType getType() {
if (isAssignment()) {
// Use the type of the lhs
return getLhs().getType();
} else {
// Most binary operators never change type
return type;
}
}
@Override
public boolean hasSideEffects() {
return op.isAssignment() || getLhs().hasSideEffects() || getRhs().hasSideEffects();
}
public boolean isAssignment() {
return op.isAssignment();
}
public void setType(JType newType) {
type = newType;
}
@Override
public void traverse(JVisitor visitor, Context ctx) {
if (visitor.visit(this, ctx)) {
if (isAssignment()) {
lhs = visitor.acceptLvalue(lhs);
} else {
lhs = visitor.accept(lhs);
}
rhs = visitor.accept(rhs);
}
visitor.endVisit(this, ctx);
}
}