Errors.js

/**
 * Copyright 2018 Google Inc. All rights reserved.
 *
 * 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.
 */

let asyncawait = true;
try {
  new Function('async function test(){await 1}');
} catch (error) {
  asyncawait = false;
}

// If node does not support async await, use the compiled version.
if (asyncawait)
  module.exports = require('./lib/Errors');
else
  module.exports = require('./node6/lib/Errors');