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Closure Compiler is a JavaScript optimizing compiler. It parses your JavaScript, analyzes it, removes dead code and rewrites and minimizes what's left. It also checks syntax, variable references, and types, and warns about common JavaScript pitfalls. It is used in many of Google's JavaScript apps, including Gmail, Google Web Search, Google Maps, and Google Docs. This binary checks for style issues such as incorrect or missing JSDoc usage, and missing goog.require() statements. It does not do more advanced checks such as typechecking.

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/*
 * Copyright 2018 The Closure Compiler Authors.
 *
 * 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.javascript.jscomp;

/**
 * How to handle exports/externs for Polymer properties and methods.
 */
public enum PolymerExportPolicy {
  /**
   * If --polymer_version=1, add all Polymer properties (but not methods) to the externs.
   * If --polymer_version=2, add readOnly and reflectToAttribute Polymer properties (but not
   * methods) to the externs.
   *
   * This policy is is not generally safe for use with renaming and unused code optimizations,
   * unless additional steps are taken (e.g. manual exports, goog.reflect.objectProperty, the
   * PolymerRenamer post-processor).
   */
  LEGACY,

  /**
   * Add all Polymer properties and methods to the externs.
   *
   * Since any of these definitions could be referenced by string in HTML templates, observer
   * definitions, or computed property definitions, this is a blunt but safe way to allow Polymer
   * code to be used with renaming and unused code optimizations enabled.
   */
  EXPORT_ALL
}