'use strict';Object.defineProperty(exports, "__esModule", { value: true });exports.default =






























deepCyclicCopy; /**
                 * Copyright (c) 2017-present, Facebook, Inc. All rights reserved.
                 *
                 * This source code is licensed under the MIT license found in the
                 * LICENSE file in the root directory of this source tree.
                 *
                 * 
                 */const EMPTY = new Set(); // Node 6 does not have gOPDs, so we define a simple polyfill for it.
if (!Object.getOwnPropertyDescriptors) {// $FlowFixMe: polyfill
  Object.getOwnPropertyDescriptors = obj => {const list = {};Object.getOwnPropertyNames(obj).concat(Object.getOwnPropertySymbols(obj)) // $FlowFixMe: assignment with a Symbol is OK.
    .forEach(key => list[key] = Object.getOwnPropertyDescriptor(obj, key));return list;};}function deepCyclicCopy(value) {let options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : { blacklist: EMPTY, keepPrototype: false };let cycles = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : new WeakMap();if (typeof value !== 'object' || value === null) {return value;} else if (cycles.has(value)) {return cycles.get(value);} else if (Array.isArray(value)) {return deepCyclicCopyArray(value, options, cycles);
  } else {
    return deepCyclicCopyObject(value, options, cycles);
  }
}

function deepCyclicCopyObject(
object,
options,
cycles)
{
  const newObject = options.keepPrototype ?
  Object.create(Object.getPrototypeOf(object)) :
  {};

  // $FlowFixMe: Object.getOwnPropertyDescriptors is polyfilled above.
  const descriptors = Object.getOwnPropertyDescriptors(object);

  cycles.set(object, newObject);

  Object.keys(descriptors).forEach(key => {
    if (options.blacklist && options.blacklist.has(key)) {
      delete descriptors[key];
      return;
    }

    const descriptor = descriptors[key];
    if (typeof descriptor.value !== 'undefined') {
      descriptor.value = deepCyclicCopy(
      descriptor.value,
      { blacklist: EMPTY, keepPrototype: options.keepPrototype },
      cycles);

    }

    descriptor.configurable = true;
  });

  return Object.defineProperties(newObject, descriptors);
}

function deepCyclicCopyArray(
array,
options,
cycles)
{
  const newArray = options.keepPrototype ?
  // $FlowFixMe: getPrototypeOf an array is OK.
  new (Object.getPrototypeOf(array).constructor)(array.length) :
  [];
  const length = array.length;

  cycles.set(array, newArray);

  for (let i = 0; i < length; i++) {
    newArray[i] = deepCyclicCopy(
    array[i],
    { blacklist: EMPTY, keepPrototype: options.keepPrototype },
    cycles);

  }

  return newArray;
}