text: 'use strict';
  var $at  = require('./$.string-at')(true);
  
  // 21.1.3.27 String.prototype[@@iterator]()
  require('./$.iter-define')(String, 'String', function(iterated){
    this._t = String(iterated); // target
    this._i = 0;                // next index
  // 21.1.5.2.1 %StringIteratorPrototype%.next()
  }, function(){
    var O     = this._t
      , index = this._i
      , point;
    if(index >= O.length)return {value: undefined, done: true};
    point = $at(O, index);
    this._i += point.length;
    return {value: point, done: false};
  });