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Java > Open Source Codes > com > google > gwt > dev > js > ast > JsNullLiteral


1 /*
2  * Copyright 2007 Google Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not
5  * use this file except in compliance with the License. You may obtain a copy of
6  * the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13  * License for the specific language governing permissions and limitations under
14  * the License.
15  */
16 package com.google.gwt.dev.js.ast;
17
18 /**
19  * A JavaScript null literal.
20  */
21 public final class JsNullLiteral extends JsExpression {
22
23   // Should only be instantiated in JsProgram
24 JsNullLiteral() {
25   }
26   
27   public boolean isLeaf() {
28     return true;
29   }
30
31   public void traverse(JsVisitor v, JsContext ctx) {
32     v.visit(this, ctx);
33     v.endVisit(this, ctx);
34   }
35 }
36
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