text: "use strict";
  /**
   * Copyright 2017 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.
   */
  Object.defineProperty(exports, "__esModule", { value: true });
  /**
   * Do a deep-copy of basic JavaScript Objects or Arrays.
   */
  function deepCopy(value) {
      return deepExtend(undefined, value);
  }
  exports.deepCopy = deepCopy;
  /**
   * Copy properties from source to target (recursively allows extension
   * of Objects and Arrays).  Scalar values in the target are over-written.
   * If target is undefined, an object of the appropriate type will be created
   * (and returned).
   *
   * We recursively copy all child properties of plain Objects in the source- so
   * that namespace- like dictionaries are merged.
   *
   * Note that the target can be a function, in which case the properties in
   * the source Object are copied onto it as static properties of the Function.
   */
  function deepExtend(target, source) {
      if (!(source instanceof Object)) {
          return source;
      }
      switch (source.constructor) {
          case Date:
              // Treat Dates like scalars; if the target date object had any child
              // properties - they will be lost!
              var dateValue = source;
              return new Date(dateValue.getTime());
          case Object:
              if (target === undefined) {
                  target = {};
              }
              break;
          case Array:
              // Always copy the array source and overwrite the target.
              target = [];
              break;
          default:
              // Not a plain Object - treat it as a scalar.
              return source;
      }
      for (var prop in source) {
          if (!source.hasOwnProperty(prop)) {
              continue;
          }
          target[prop] = deepExtend(target[prop], source[prop]);
      }
      return target;
  }
  exports.deepExtend = deepExtend;
  // TODO: Really needed (for JSCompiler type checking)?
  function patchProperty(obj, prop, value) {
      obj[prop] = value;
  }
  exports.patchProperty = patchProperty;
  
  //# sourceMappingURL=deepCopy.js.map
  