com.google.gwt.dev.js.ast.JsThisRef Maven / Gradle / Ivy
/*
* 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;
/**
* A JavaScript this reference.
*/
public final class JsThisRef extends JsValueLiteral {
public JsThisRef(SourceInfo sourceInfo) {
super(sourceInfo);
}
public boolean isBooleanFalse() {
return false;
}
public boolean isBooleanTrue() {
return true;
}
@Override
public boolean isDefinitelyNotNull() {
/*
* You'd think that you could get a null this via function.call/apply, but
* in fact you can't: they just make this be the window object instead. So
* it really can't ever be null.
*/
return true;
}
@Override
public boolean isDefinitelyNull() {
return false;
}
public void traverse(JsVisitor v, JsContext ctx) {
v.visit(this, ctx);
v.endVisit(this, ctx);
}
}