text: /**
  * @license Apache-2.0
  *
  * Copyright (c) 2019 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';
  
  /**
  * Create an iterator which generates a square wave.
  *
  * @module @stdlib/simulate-iter-square-wave
  *
  * @example
  * var iterSquareWave = require( '@stdlib/simulate-iter-square-wave' );
  *
  * var opts = {
  *     'period': 4
  * };
  *
  * var iter = iterSquareWave( opts );
  *
  * var v = iter.next().value;
  * // returns 1.0
  *
  * v = iter.next().value;
  * // returns 1.0
  *
  * v = iter.next().value;
  * // returns -1.0
  *
  * // ...
  */
  
  // MODULES //
  
  var iterator = require( './main.js' );
  
  
  // EXPORTS //
  
  module.exports = iterator;
  