text: /**
  * @license Apache-2.0
  *
  * Copyright (c) 2018 The Stdlib 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.
  */
  
  'use strict';
  
  // MAIN //
  
  /**
  * Creates a CustomError class constructor. Note that we use function generation so that tests may be run in browsers not supporting ES2015 classes. This function may be loaded in non-ES2015 environments, but should only be invoked when ES2015 classes are supported.
  *
  * @private
  * @returns {Function} constructor
  */
  function createClass() {
  	var str = '';
  	str += '(function create() {';
  	str += 'class CustomError extends Error {';
  	str += 'constructor( msg ) {';
  	str += 'super( msg );';
  	str += '}';
  	str += '}';
  	str += 'return CustomError;';
  	str += '})()';
  	return eval( str ); // eslint-disable-line no-eval
  }
  
  
  // EXPORTS //
  
  module.exports = createClass;
  