| /* |
| * Copyright 2008 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.js.ast; |
| |
| import com.google.gwt.dev.jjs.SourceInfo; |
| |
| /** |
| * Represents a JavaScript binary operation. |
| */ |
| public final class JsBinaryOperation extends JsExpression { |
| |
| private JsExpression arg1; |
| |
| private JsExpression arg2; |
| |
| private final JsBinaryOperator op; |
| |
| public JsBinaryOperation(SourceInfo sourceInfo, JsBinaryOperator op) { |
| this(sourceInfo, op, null, null); |
| } |
| |
| public JsBinaryOperation(SourceInfo sourceInfo, JsBinaryOperator op, JsExpression arg1, |
| JsExpression arg2) { |
| super(sourceInfo); |
| this.op = op; |
| this.arg1 = arg1; |
| this.arg2 = arg2; |
| } |
| |
| public JsExpression getArg1() { |
| return arg1; |
| } |
| |
| public JsExpression getArg2() { |
| return arg2; |
| } |
| |
| @Override |
| public NodeKind getKind() { |
| return NodeKind.BINARY_OP; |
| } |
| |
| public JsBinaryOperator getOperator() { |
| return op; |
| } |
| |
| @Override |
| public boolean hasSideEffects() { |
| return op.isAssignment() || arg1.hasSideEffects() || arg2.hasSideEffects(); |
| } |
| |
| @Override |
| public boolean isDefinitelyNull() { |
| if (op == JsBinaryOperator.AND) { |
| return arg1.isDefinitelyNull(); |
| } |
| return false; |
| } |
| |
| public void setArg1(JsExpression arg1) { |
| this.arg1 = arg1; |
| } |
| |
| public void setArg2(JsExpression arg2) { |
| this.arg2 = arg2; |
| } |
| |
| @Override |
| public void traverse(JsVisitor v, JsContext ctx) { |
| if (v.visit(this, ctx)) { |
| if (op.isAssignment()) { |
| arg1 = v.acceptLvalue(arg1); |
| } else { |
| arg1 = v.accept(arg1); |
| } |
| arg2 = v.accept(arg2); |
| } |
| v.endVisit(this, ctx); |
| } |
| } |