HORIZON PROJECT

var toArray = require('./toArray');

/**

 * Gets the next value on a wrapped object following the

 * [iterator protocol](https://mdn.io/iteration_protocols#iterator).

 *

 * @name next

 * @memberOf _

 * @since 4.0.0

 * @category Seq

 * @returns {Object} Returns the next iterator value.

 * @example

 *

 * var wrapped = _([1, 2]);

 *

 * wrapped.next();

 * // => { 'done': false, 'value': 1 }

 *

 * wrapped.next();

 * // => { 'done': false, 'value': 2 }

 *

 * wrapped.next();

 * // => { 'done': true, 'value': undefined }

 */

function wrapperNext() {

  if (this.__values__ === undefined) {

    this.__values__ = toArray(this.value());

  }

  var done = this.__index__ >= this.__values__.length,

      value = done ? undefined : this.__values__[this.__index__++];

  return { 'done': done, 'value': value };

}

module.exports = wrapperNext;