com.google.gwt.dev.js.ast.JsNew 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;

import java.util.ArrayList;
import java.util.List;

/**
 * Represents the JavaScript new expression.
 */
public final class JsNew extends JsExpression implements HasArguments {

  private final List args = new ArrayList();

  private JsExpression ctorExpr;

  public JsNew(SourceInfo sourceInfo, JsExpression ctorExpr) {
    super(sourceInfo);
    this.ctorExpr = ctorExpr;
  }

  @Override
  public List getArguments() {
    return args;
  }

  public JsExpression getConstructorExpression() {
    return ctorExpr;
  }

  @Override
  public NodeKind getKind() {
    return NodeKind.NEW;
  }

  @Override
  public boolean hasSideEffects() {
    return true;
  }

  @Override
  public boolean isDefinitelyNotNull() {
    // Sadly, in JS it can be!
    // TODO: analysis could probably determine most instances cannot be null.
    return false;
  }

  @Override
  public boolean isDefinitelyNull() {
    return false;
  }

  @Override
  public void traverse(JsVisitor v, JsContext ctx) {
    if (v.visit(this, ctx)) {
      ctorExpr = v.accept(ctorExpr);
      v.acceptList(args);
    }
    v.endVisit(this, ctx);
  }
}