/**
 * @file This method removes whitespace from the right end of a string.
 * @version 3.0.0
 * @author Xotic750 <Xotic750@gmail.com>
 * @copyright  Xotic750
 * @license {@link <https://opensource.org/licenses/MIT> MIT}
 * @module trim-right-x
 */

'use strict';

var requireCoercibleToString = require('require-coercible-to-string-x');
var Rx = require('cached-constructors-x').RegExp;
var reRight2016 = new Rx('[' + require('white-space-x').string2016 + ']+$');
var reRight2018 = new Rx('[' + require('white-space-x').string2018 + ']+$');
var replace = ''.replace;

var $trimRight2016 = function trimRight2016(string) {
  return replace.call(requireCoercibleToString(string), reRight2016, '');
};

var $trimRight2018 = function trimRight2018(string) {
  return replace.call(requireCoercibleToString(string), reRight2018, '');
};

module.exports = {
  /**
   * A reference to trimRight2018.
   */
  trimRight: $trimRight2018,

  /**
   * This method removes whitespace from the right end of a string. (ES2016)
   *
   * @param {string} string - The string to trim the right end whitespace from.
   * @throws {TypeError} If string is null or undefined or not coercible.
   * @returns {string} The right trimmed string.
   * @example
   * var trimRight = require('trim-right-x');
   *
   * trimRight(' \t\na \t\n') === ' \t\na'; // true
   */
  trimRight2016: $trimRight2016,

  /**
   * This method removes whitespace from the right end of a string. (ES2018)
   *
   * @param {string} string - The string to trim the right end whitespace from.
   * @throws {TypeError} If string is null or undefined or not coercible.
   * @returns {string} The right trimmed string.
   * @example
   * var trimRight = require('trim-right-x');
   *
   * trimRight(' \t\na \t\n') === ' \t\na'; // true
   */
  trimRight2018: $trimRight2018
};