(function (global, factory) {
  typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
  typeof define === 'function' && define.amd ? define(factory) :
  (global.IntlPolyfill = factory());
}(this, function () { 'use strict';

  var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) {
    return typeof obj;
  } : function (obj) {
    return obj && typeof Symbol === "function" && obj.constructor === Symbol ? "symbol" : typeof obj;
  };

  var jsx = function () {
    var REACT_ELEMENT_TYPE = typeof Symbol === "function" && Symbol.for && Symbol.for("react.element") || 0xeac7;
    return function createRawReactElement(type, props, key, children) {
      var defaultProps = type && type.defaultProps;
      var childrenLength = arguments.length - 3;

      if (!props && childrenLength !== 0) {
        props = {};
      }

      if (props && defaultProps) {
        for (var propName in defaultProps) {
          if (props[propName] === void 0) {
            props[propName] = defaultProps[propName];
          }
        }
      } else if (!props) {
        props = defaultProps || {};
      }

      if (childrenLength === 1) {
        props.children = children;
      } else if (childrenLength > 1) {
        var childArray = Array(childrenLength);

        for (var i = 0; i < childrenLength; i++) {
          childArray[i] = arguments[i + 3];
        }

        props.children = childArray;
      }

      return {
        $$typeof: REACT_ELEMENT_TYPE,
        type: type,
        key: key === undefined ? null : '' + key,
        ref: null,
        props: props,
        _owner: null
      };
    };
  }();

  var asyncToGenerator = function (fn) {
    return function () {
      var gen = fn.apply(this, arguments);
      return new Promise(function (resolve, reject) {
        function step(key, arg) {
          try {
            var info = gen[key](arg);
            var value = info.value;
          } catch (error) {
            reject(error);
            return;
          }

          if (info.done) {
            resolve(value);
          } else {
            return Promise.resolve(value).then(function (value) {
              return step("next", value);
            }, function (err) {
              return step("throw", err);
            });
          }
        }

        return step("next");
      });
    };
  };

  var classCallCheck = function (instance, Constructor) {
    if (!(instance instanceof Constructor)) {
      throw new TypeError("Cannot call a class as a function");
    }
  };

  var createClass = function () {
    function defineProperties(target, props) {
      for (var i = 0; i < props.length; i++) {
        var descriptor = props[i];
        descriptor.enumerable = descriptor.enumerable || false;
        descriptor.configurable = true;
        if ("value" in descriptor) descriptor.writable = true;
        Object.defineProperty(target, descriptor.key, descriptor);
      }
    }

    return function (Constructor, protoProps, staticProps) {
      if (protoProps) defineProperties(Constructor.prototype, protoProps);
      if (staticProps) defineProperties(Constructor, staticProps);
      return Constructor;
    };
  }();

  var defineEnumerableProperties = function (obj, descs) {
    for (var key in descs) {
      var desc = descs[key];
      desc.configurable = desc.enumerable = true;
      if ("value" in desc) desc.writable = true;
      Object.defineProperty(obj, key, desc);
    }

    return obj;
  };

  var defaults = function (obj, defaults) {
    var keys = Object.getOwnPropertyNames(defaults);

    for (var i = 0; i < keys.length; i++) {
      var key = keys[i];
      var value = Object.getOwnPropertyDescriptor(defaults, key);

      if (value && value.configurable && obj[key] === undefined) {
        Object.defineProperty(obj, key, value);
      }
    }

    return obj;
  };

  var defineProperty$1 = function (obj, key, value) {
    if (key in obj) {
      Object.defineProperty(obj, key, {
        value: value,
        enumerable: true,
        configurable: true,
        writable: true
      });
    } else {
      obj[key] = value;
    }

    return obj;
  };

  var _extends = Object.assign || function (target) {
    for (var i = 1; i < arguments.length; i++) {
      var source = arguments[i];

      for (var key in source) {
        if (Object.prototype.hasOwnProperty.call(source, key)) {
          target[key] = source[key];
        }
      }
    }

    return target;
  };

  var get = function get(object, property, receiver) {
    if (object === null) object = Function.prototype;
    var desc = Object.getOwnPropertyDescriptor(object, property);

    if (desc === undefined) {
      var parent = Object.getPrototypeOf(object);

      if (parent === null) {
        return undefined;
      } else {
        return get(parent, property, receiver);
      }
    } else if ("value" in desc) {
      return desc.value;
    } else {
      var getter = desc.get;

      if (getter === undefined) {
        return undefined;
      }

      return getter.call(receiver);
    }
  };

  var inherits = function (subClass, superClass) {
    if (typeof superClass !== "function" && superClass !== null) {
      throw new TypeError("Super expression must either be null or a function, not " + typeof superClass);
    }

    subClass.prototype = Object.create(superClass && superClass.prototype, {
      constructor: {
        value: subClass,
        enumerable: false,
        writable: true,
        configurable: true
      }
    });
    if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass;
  };

  var _instanceof = function (left, right) {
    if (right != null && typeof Symbol !== "undefined" && right[Symbol.hasInstance]) {
      return right[Symbol.hasInstance](left);
    } else {
      return left instanceof right;
    }
  };

  var interopRequireDefault = function (obj) {
    return obj && obj.__esModule ? obj : {
      default: obj
    };
  };

  var interopRequireWildcard = function (obj) {
    if (obj && obj.__esModule) {
      return obj;
    } else {
      var newObj = {};

      if (obj != null) {
        for (var key in obj) {
          if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key];
        }
      }

      newObj.default = obj;
      return newObj;
    }
  };

  var newArrowCheck = function (innerThis, boundThis) {
    if (innerThis !== boundThis) {
      throw new TypeError("Cannot instantiate an arrow function");
    }
  };

  var objectDestructuringEmpty = function (obj) {
    if (obj == null) throw new TypeError("Cannot destructure undefined");
  };

  var objectWithoutProperties = function (obj, keys) {
    var target = {};

    for (var i in obj) {
      if (keys.indexOf(i) >= 0) continue;
      if (!Object.prototype.hasOwnProperty.call(obj, i)) continue;
      target[i] = obj[i];
    }

    return target;
  };

  var possibleConstructorReturn = function (self, call) {
    if (!self) {
      throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
    }

    return call && (typeof call === "object" || typeof call === "function") ? call : self;
  };

  var selfGlobal = typeof global === "undefined" ? self : global;

  var set = function set(object, property, value, receiver) {
    var desc = Object.getOwnPropertyDescriptor(object, property);

    if (desc === undefined) {
      var parent = Object.getPrototypeOf(object);

      if (parent !== null) {
        set(parent, property, value, receiver);
      }
    } else if ("value" in desc && desc.writable) {
      desc.value = value;
    } else {
      var setter = desc.set;

      if (setter !== undefined) {
        setter.call(receiver, value);
      }
    }

    return value;
  };

  var slicedToArray = function () {
    function sliceIterator(arr, i) {
      var _arr = [];
      var _n = true;
      var _d = false;
      var _e = undefined;

      try {
        for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
          _arr.push(_s.value);

          if (i && _arr.length === i) break;
        }
      } catch (err) {
        _d = true;
        _e = err;
      } finally {
        try {
          if (!_n && _i["return"]) _i["return"]();
        } finally {
          if (_d) throw _e;
        }
      }

      return _arr;
    }

    return function (arr, i) {
      if (Array.isArray(arr)) {
        return arr;
      } else if (Symbol.iterator in Object(arr)) {
        return sliceIterator(arr, i);
      } else {
        throw new TypeError("Invalid attempt to destructure non-iterable instance");
      }
    };
  }();

  var slicedToArrayLoose = function (arr, i) {
    if (Array.isArray(arr)) {
      return arr;
    } else if (Symbol.iterator in Object(arr)) {
      var _arr = [];

      for (var _iterator = arr[Symbol.iterator](), _step; !(_step = _iterator.next()).done;) {
        _arr.push(_step.value);

        if (i && _arr.length === i) break;
      }

      return _arr;
    } else {
      throw new TypeError("Invalid attempt to destructure non-iterable instance");
    }
  };

  var taggedTemplateLiteral = function (strings, raw) {
    return Object.freeze(Object.defineProperties(strings, {
      raw: {
        value: Object.freeze(raw)
      }
    }));
  };

  var taggedTemplateLiteralLoose = function (strings, raw) {
    strings.raw = raw;
    return strings;
  };

  var temporalRef = function (val, name, undef) {
    if (val === undef) {
      throw new ReferenceError(name + " is not defined - temporal dead zone");
    } else {
      return val;
    }
  };

  var temporalUndefined = {};

  var toArray = function (arr) {
    return Array.isArray(arr) ? arr : Array.from(arr);
  };

  var toConsumableArray = function (arr) {
    if (Array.isArray(arr)) {
      for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i];

      return arr2;
    } else {
      return Array.from(arr);
    }
  };



  var babelHelpers$1 = Object.freeze({
    jsx: jsx,
    asyncToGenerator: asyncToGenerator,
    classCallCheck: classCallCheck,
    createClass: createClass,
    defineEnumerableProperties: defineEnumerableProperties,
    defaults: defaults,
    defineProperty: defineProperty$1,
    get: get,
    inherits: inherits,
    interopRequireDefault: interopRequireDefault,
    interopRequireWildcard: interopRequireWildcard,
    newArrowCheck: newArrowCheck,
    objectDestructuringEmpty: objectDestructuringEmpty,
    objectWithoutProperties: objectWithoutProperties,
    possibleConstructorReturn: possibleConstructorReturn,
    selfGlobal: selfGlobal,
    set: set,
    slicedToArray: slicedToArray,
    slicedToArrayLoose: slicedToArrayLoose,
    taggedTemplateLiteral: taggedTemplateLiteral,
    taggedTemplateLiteralLoose: taggedTemplateLiteralLoose,
    temporalRef: temporalRef,
    temporalUndefined: temporalUndefined,
    toArray: toArray,
    toConsumableArray: toConsumableArray,
    typeof: _typeof,
    extends: _extends,
    instanceof: _instanceof
  });

  var realDefineProp = function () {
      var sentinel = function sentinel() {};
      try {
          Object.defineProperty(sentinel, 'a', {
              get: function get() {
                  return 1;
              }
          });
          Object.defineProperty(sentinel, 'prototype', { writable: false });
          return sentinel.a === 1 && sentinel.prototype instanceof Object;
      } catch (e) {
          return false;
      }
  }();

  // Need a workaround for getters in ES3
  var es3 = !realDefineProp && !Object.prototype.__defineGetter__;

  // We use this a lot (and need it for proto-less objects)
  var hop = Object.prototype.hasOwnProperty;

  // Naive defineProperty for compatibility
  var defineProperty = realDefineProp ? Object.defineProperty : function (obj, name, desc) {
      if ('get' in desc && obj.__defineGetter__) obj.__defineGetter__(name, desc.get);else if (!hop.call(obj, name) || 'value' in desc) obj[name] = desc.value;
  };

  // Array.prototype.indexOf, as good as we need it to be
  var arrIndexOf = Array.prototype.indexOf || function (search) {
      /*jshint validthis:true */
      var t = this;
      if (!t.length) return -1;

      for (var i = arguments[1] || 0, max = t.length; i < max; i++) {
          if (t[i] === search) return i;
      }

      return -1;
  };

  // Create an object with the specified prototype (2nd arg required for Record)
  var objCreate = Object.create || function (proto, props) {
      var obj = void 0;

      function F() {}
      F.prototype = proto;
      obj = new F();

      for (var k in props) {
          if (hop.call(props, k)) defineProperty(obj, k, props[k]);
      }

      return obj;
  };

  // Snapshot some (hopefully still) native built-ins
  var arrSlice = Array.prototype.slice;
  var arrConcat = Array.prototype.concat;
  var arrPush = Array.prototype.push;
  var arrJoin = Array.prototype.join;
  var arrShift = Array.prototype.shift;

  // Naive Function.prototype.bind for compatibility
  var fnBind = Function.prototype.bind || function (thisObj) {
      var fn = this,
          args = arrSlice.call(arguments, 1);

      // All our (presently) bound functions have either 1 or 0 arguments. By returning
      // different function signatures, we can pass some tests in ES3 environments
      if (fn.length === 1) {
          return function () {
              return fn.apply(thisObj, arrConcat.call(args, arrSlice.call(arguments)));
          };
      }
      return function () {
          return fn.apply(thisObj, arrConcat.call(args, arrSlice.call(arguments)));
      };
  };

  // Object housing internal properties for constructors
  var internals = objCreate(null);

  // Keep internal properties internal
  var secret = Math.random();

  // Helper functions
  // ================

  /**
   * A function to deal with the inaccuracy of calculating log10 in pre-ES6
   * JavaScript environments. Math.log(num) / Math.LN10 was responsible for
   * causing issue #62.
   */
  function log10Floor(n) {
      // ES6 provides the more accurate Math.log10
      if (typeof Math.log10 === 'function') return Math.floor(Math.log10(n));

      var x = Math.round(Math.log(n) * Math.LOG10E);
      return x - (Number('1e' + x) > n);
  }

  /**
   * A map that doesn't contain Object in its prototype chain
   */
  function Record(obj) {
      // Copy only own properties over unless this object is already a Record instance
      for (var k in obj) {
          if (obj instanceof Record || hop.call(obj, k)) defineProperty(this, k, { value: obj[k], enumerable: true, writable: true, configurable: true });
      }
  }
  Record.prototype = objCreate(null);

  /**
   * An ordered list
   */
  function List() {
      defineProperty(this, 'length', { writable: true, value: 0 });

      if (arguments.length) arrPush.apply(this, arrSlice.call(arguments));
  }
  List.prototype = objCreate(null);

  /**
   * Constructs a regular expression to restore tainted RegExp properties
   */
  function createRegExpRestore() {
      if (internals.disableRegExpRestore) {
          return function () {/* no-op */};
      }

      var regExpCache = {
          lastMatch: RegExp.lastMatch || '',
          leftContext: RegExp.leftContext,
          multiline: RegExp.multiline,
          input: RegExp.input
      },
          has = false;

      // Create a snapshot of all the 'captured' properties
      for (var i = 1; i <= 9; i++) {
          has = (regExpCache['$' + i] = RegExp['$' + i]) || has;
      }return function () {
          // Now we've snapshotted some properties, escape the lastMatch string
          var esc = /[.?*+^$[\]\\(){}|-]/g,
              lm = regExpCache.lastMatch.replace(esc, '\\$&'),
              reg = new List();

          // If any of the captured strings were non-empty, iterate over them all
          if (has) {
              for (var _i = 1; _i <= 9; _i++) {
                  var m = regExpCache['$' + _i];

                  // If it's empty, add an empty capturing group
                  if (!m) lm = '()' + lm;

                  // Else find the string in lm and escape & wrap it to capture it
                  else {
                          m = m.replace(esc, '\\$&');
                          lm = lm.replace(m, '(' + m + ')');
                      }

                  // Push it to the reg and chop lm to make sure further groups come after
                  arrPush.call(reg, lm.slice(0, lm.indexOf('(') + 1));
                  lm = lm.slice(lm.indexOf('(') + 1);
              }
          }

          var exprStr = arrJoin.call(reg, '') + lm;

          // Shorten the regex by replacing each part of the expression with a match
          // for a string of that exact length.  This is safe for the type of
          // expressions generated above, because the expression matches the whole
          // match string, so we know each group and each segment between capturing
          // groups can be matched by its length alone.
          exprStr = exprStr.replace(/(\\\(|\\\)|[^()])+/g, function (match) {
              return '[\\s\\S]{' + match.replace('\\', '').length + '}';
          });

          // Create the regular expression that will reconstruct the RegExp properties
          var expr = new RegExp(exprStr, regExpCache.multiline ? 'gm' : 'g');

          // Set the lastIndex of the generated expression to ensure that the match
          // is found in the correct index.
          expr.lastIndex = regExpCache.leftContext.length;

          expr.exec(regExpCache.input);
      };
  }

  /**
   * Mimics ES5's abstract ToObject() function
   */
  function toObject(arg) {
      if (arg === null) throw new TypeError('Cannot convert null or undefined to object');

      if ((typeof arg === 'undefined' ? 'undefined' : babelHelpers$1['typeof'](arg)) === 'object') return arg;
      return Object(arg);
  }

  function toNumber(arg) {
      if (typeof arg === 'number') return arg;
      return Number(arg);
  }

  function toInteger(arg) {
      var number = toNumber(arg);
      if (isNaN(number)) return 0;
      if (number === +0 || number === -0 || number === +Infinity || number === -Infinity) return number;
      if (number < 0) return Math.floor(Math.abs(number)) * -1;
      return Math.floor(Math.abs(number));
  }

  function toLength(arg) {
      var len = toInteger(arg);
      if (len <= 0) return 0;
      if (len === Infinity) return Math.pow(2, 53) - 1;
      return Math.min(len, Math.pow(2, 53) - 1);
  }

  /**
   * Returns "internal" properties for an object
   */
  function getInternalProperties(obj) {
      if (hop.call(obj, '__getInternalProperties')) return obj.__getInternalProperties(secret);

      return objCreate(null);
  }

  /**
  * Defines regular expressions for various operations related to the BCP 47 syntax,
  * as defined at http://tools.ietf.org/html/bcp47#section-2.1
  */

  // extlang       = 3ALPHA              ; selected ISO 639 codes
  //                 *2("-" 3ALPHA)      ; permanently reserved
  var extlang = '[a-z]{3}(?:-[a-z]{3}){0,2}';

  // language      = 2*3ALPHA            ; shortest ISO 639 code
  //                 ["-" extlang]       ; sometimes followed by
  //                                     ; extended language subtags
  //               / 4ALPHA              ; or reserved for future use
  //               / 5*8ALPHA            ; or registered language subtag
  var language = '(?:[a-z]{2,3}(?:-' + extlang + ')?|[a-z]{4}|[a-z]{5,8})';

  // script        = 4ALPHA              ; ISO 15924 code
  var script = '[a-z]{4}';

  // region        = 2ALPHA              ; ISO 3166-1 code
  //               / 3DIGIT              ; UN M.49 code
  var region = '(?:[a-z]{2}|\\d{3})';

  // variant       = 5*8alphanum         ; registered variants
  //               / (DIGIT 3alphanum)
  var variant = '(?:[a-z0-9]{5,8}|\\d[a-z0-9]{3})';

  //                                     ; Single alphanumerics
  //                                     ; "x" reserved for private use
  // singleton     = DIGIT               ; 0 - 9
  //               / %x41-57             ; A - W
  //               / %x59-5A             ; Y - Z
  //               / %x61-77             ; a - w
  //               / %x79-7A             ; y - z
  var singleton = '[0-9a-wy-z]';

  // extension     = singleton 1*("-" (2*8alphanum))
  var extension = singleton + '(?:-[a-z0-9]{2,8})+';

  // privateuse    = "x" 1*("-" (1*8alphanum))
  var privateuse = 'x(?:-[a-z0-9]{1,8})+';

  // irregular     = "en-GB-oed"         ; irregular tags do not match
  //               / "i-ami"             ; the 'langtag' production and
  //               / "i-bnn"             ; would not otherwise be
  //               / "i-default"         ; considered 'well-formed'
  //               / "i-enochian"        ; These tags are all valid,
  //               / "i-hak"             ; but most are deprecated
  //               / "i-klingon"         ; in favor of more modern
  //               / "i-lux"             ; subtags or subtag
  //               / "i-mingo"           ; combination
  //               / "i-navajo"
  //               / "i-pwn"
  //               / "i-tao"
  //               / "i-tay"
  //               / "i-tsu"
  //               / "sgn-BE-FR"
  //               / "sgn-BE-NL"
  //               / "sgn-CH-DE"
  var irregular = '(?:en-GB-oed' + '|i-(?:ami|bnn|default|enochian|hak|klingon|lux|mingo|navajo|pwn|tao|tay|tsu)' + '|sgn-(?:BE-FR|BE-NL|CH-DE))';

  // regular       = "art-lojban"        ; these tags match the 'langtag'
  //               / "cel-gaulish"       ; production, but their subtags
  //               / "no-bok"            ; are not extended language
  //               / "no-nyn"            ; or variant subtags: their meaning
  //               / "zh-guoyu"          ; is defined by their registration
  //               / "zh-hakka"          ; and all of these are deprecated
  //               / "zh-min"            ; in favor of a more modern
  //               / "zh-min-nan"        ; subtag or sequence of subtags
  //               / "zh-xiang"
  var regular = '(?:art-lojban|cel-gaulish|no-bok|no-nyn' + '|zh-(?:guoyu|hakka|min|min-nan|xiang))';

  // grandfathered = irregular           ; non-redundant tags registered
  //               / regular             ; during the RFC 3066 era
  var grandfathered = '(?:' + irregular + '|' + regular + ')';

  // langtag       = language
  //                 ["-" script]
  //                 ["-" region]
  //                 *("-" variant)
  //                 *("-" extension)
  //                 ["-" privateuse]
  var langtag = language + '(?:-' + script + ')?(?:-' + region + ')?(?:-' + variant + ')*(?:-' + extension + ')*(?:-' + privateuse + ')?';

  // Language-Tag  = langtag             ; normal language tags
  //               / privateuse          ; private use tag
  //               / grandfathered       ; grandfathered tags
  var expBCP47Syntax = RegExp('^(?:' + langtag + '|' + privateuse + '|' + grandfathered + ')$', 'i');

  // Match duplicate variants in a language tag
  var expVariantDupes = RegExp('^(?!x).*?-(' + variant + ')-(?:\\w{4,8}-(?!x-))*\\1\\b', 'i');

  // Match duplicate singletons in a language tag (except in private use)
  var expSingletonDupes = RegExp('^(?!x).*?-(' + singleton + ')-(?:\\w+-(?!x-))*\\1\\b', 'i');

  // Match all extension sequences
  var expExtSequences = RegExp('-' + extension, 'ig');

  // Default locale is the first-added locale data for us
  var defaultLocale = void 0;
  function setDefaultLocale(locale) {
      defaultLocale = locale;
  }

  // IANA Subtag Registry redundant tag and subtag maps
  var redundantTags = {
      tags: {
          "art-lojban": "jbo",
          "i-ami": "ami",
          "i-bnn": "bnn",
          "i-hak": "hak",
          "i-klingon": "tlh",
          "i-lux": "lb",
          "i-navajo": "nv",
          "i-pwn": "pwn",
          "i-tao": "tao",
          "i-tay": "tay",
          "i-tsu": "tsu",
          "no-bok": "nb",
          "no-nyn": "nn",
          "sgn-BE-FR": "sfb",
          "sgn-BE-NL": "vgt",
          "sgn-CH-DE": "sgg",
          "zh-guoyu": "cmn",
          "zh-hakka": "hak",
          "zh-min-nan": "nan",
          "zh-xiang": "hsn",
          "sgn-BR": "bzs",
          "sgn-CO": "csn",
          "sgn-DE": "gsg",
          "sgn-DK": "dsl",
          "sgn-ES": "ssp",
          "sgn-FR": "fsl",
          "sgn-GB": "bfi",
          "sgn-GR": "gss",
          "sgn-IE": "isg",
          "sgn-IT": "ise",
          "sgn-JP": "jsl",
          "sgn-MX": "mfs",
          "sgn-NI": "ncs",
          "sgn-NL": "dse",
          "sgn-NO": "nsl",
          "sgn-PT": "psr",
          "sgn-SE": "swl",
          "sgn-US": "ase",
          "sgn-ZA": "sfs",
          "zh-cmn": "cmn",
          "zh-cmn-Hans": "cmn-Hans",
          "zh-cmn-Hant": "cmn-Hant",
          "zh-gan": "gan",
          "zh-wuu": "wuu",
          "zh-yue": "yue"
      },
      subtags: {
          BU: "MM",
          DD: "DE",
          FX: "FR",
          TP: "TL",
          YD: "YE",
          ZR: "CD",
          heploc: "alalc97",
          'in': "id",
          iw: "he",
          ji: "yi",
          jw: "jv",
          mo: "ro",
          ayx: "nun",
          bjd: "drl",
          ccq: "rki",
          cjr: "mom",
          cka: "cmr",
          cmk: "xch",
          drh: "khk",
          drw: "prs",
          gav: "dev",
          hrr: "jal",
          ibi: "opa",
          kgh: "kml",
          lcq: "ppr",
          mst: "mry",
          myt: "mry",
          sca: "hle",
          tie: "ras",
          tkk: "twm",
          tlw: "weo",
          tnf: "prs",
          ybd: "rki",
          yma: "lrr"
      },
      extLang: {
          aao: ["aao", "ar"],
          abh: ["abh", "ar"],
          abv: ["abv", "ar"],
          acm: ["acm", "ar"],
          acq: ["acq", "ar"],
          acw: ["acw", "ar"],
          acx: ["acx", "ar"],
          acy: ["acy", "ar"],
          adf: ["adf", "ar"],
          ads: ["ads", "sgn"],
          aeb: ["aeb", "ar"],
          aec: ["aec", "ar"],
          aed: ["aed", "sgn"],
          aen: ["aen", "sgn"],
          afb: ["afb", "ar"],
          afg: ["afg", "sgn"],
          ajp: ["ajp", "ar"],
          apc: ["apc", "ar"],
          apd: ["apd", "ar"],
          arb: ["arb", "ar"],
          arq: ["arq", "ar"],
          ars: ["ars", "ar"],
          ary: ["ary", "ar"],
          arz: ["arz", "ar"],
          ase: ["ase", "sgn"],
          asf: ["asf", "sgn"],
          asp: ["asp", "sgn"],
          asq: ["asq", "sgn"],
          asw: ["asw", "sgn"],
          auz: ["auz", "ar"],
          avl: ["avl", "ar"],
          ayh: ["ayh", "ar"],
          ayl: ["ayl", "ar"],
          ayn: ["ayn", "ar"],
          ayp: ["ayp", "ar"],
          bbz: ["bbz", "ar"],
          bfi: ["bfi", "sgn"],
          bfk: ["bfk", "sgn"],
          bjn: ["bjn", "ms"],
          bog: ["bog", "sgn"],
          bqn: ["bqn", "sgn"],
          bqy: ["bqy", "sgn"],
          btj: ["btj", "ms"],
          bve: ["bve", "ms"],
          bvl: ["bvl", "sgn"],
          bvu: ["bvu", "ms"],
          bzs: ["bzs", "sgn"],
          cdo: ["cdo", "zh"],
          cds: ["cds", "sgn"],
          cjy: ["cjy", "zh"],
          cmn: ["cmn", "zh"],
          coa: ["coa", "ms"],
          cpx: ["cpx", "zh"],
          csc: ["csc", "sgn"],
          csd: ["csd", "sgn"],
          cse: ["cse", "sgn"],
          csf: ["csf", "sgn"],
          csg: ["csg", "sgn"],
          csl: ["csl", "sgn"],
          csn: ["csn", "sgn"],
          csq: ["csq", "sgn"],
          csr: ["csr", "sgn"],
          czh: ["czh", "zh"],
          czo: ["czo", "zh"],
          doq: ["doq", "sgn"],
          dse: ["dse", "sgn"],
          dsl: ["dsl", "sgn"],
          dup: ["dup", "ms"],
          ecs: ["ecs", "sgn"],
          esl: ["esl", "sgn"],
          esn: ["esn", "sgn"],
          eso: ["eso", "sgn"],
          eth: ["eth", "sgn"],
          fcs: ["fcs", "sgn"],
          fse: ["fse", "sgn"],
          fsl: ["fsl", "sgn"],
          fss: ["fss", "sgn"],
          gan: ["gan", "zh"],
          gds: ["gds", "sgn"],
          gom: ["gom", "kok"],
          gse: ["gse", "sgn"],
          gsg: ["gsg", "sgn"],
          gsm: ["gsm", "sgn"],
          gss: ["gss", "sgn"],
          gus: ["gus", "sgn"],
          hab: ["hab", "sgn"],
          haf: ["haf", "sgn"],
          hak: ["hak", "zh"],
          hds: ["hds", "sgn"],
          hji: ["hji", "ms"],
          hks: ["hks", "sgn"],
          hos: ["hos", "sgn"],
          hps: ["hps", "sgn"],
          hsh: ["hsh", "sgn"],
          hsl: ["hsl", "sgn"],
          hsn: ["hsn", "zh"],
          icl: ["icl", "sgn"],
          ils: ["ils", "sgn"],
          inl: ["inl", "sgn"],
          ins: ["ins", "sgn"],
          ise: ["ise", "sgn"],
          isg: ["isg", "sgn"],
          isr: ["isr", "sgn"],
          jak: ["jak", "ms"],
          jax: ["jax", "ms"],
          jcs: ["jcs", "sgn"],
          jhs: ["jhs", "sgn"],
          jls: ["jls", "sgn"],
          jos: ["jos", "sgn"],
          jsl: ["jsl", "sgn"],
          jus: ["jus", "sgn"],
          kgi: ["kgi", "sgn"],
          knn: ["knn", "kok"],
          kvb: ["kvb", "ms"],
          kvk: ["kvk", "sgn"],
          kvr: ["kvr", "ms"],
          kxd: ["kxd", "ms"],
          lbs: ["lbs", "sgn"],
          lce: ["lce", "ms"],
          lcf: ["lcf", "ms"],
          liw: ["liw", "ms"],
          lls: ["lls", "sgn"],
          lsg: ["lsg", "sgn"],
          lsl: ["lsl", "sgn"],
          lso: ["lso", "sgn"],
          lsp: ["lsp", "sgn"],
          lst: ["lst", "sgn"],
          lsy: ["lsy", "sgn"],
          ltg: ["ltg", "lv"],
          lvs: ["lvs", "lv"],
          lzh: ["lzh", "zh"],
          max: ["max", "ms"],
          mdl: ["mdl", "sgn"],
          meo: ["meo", "ms"],
          mfa: ["mfa", "ms"],
          mfb: ["mfb", "ms"],
          mfs: ["mfs", "sgn"],
          min: ["min", "ms"],
          mnp: ["mnp", "zh"],
          mqg: ["mqg", "ms"],
          mre: ["mre", "sgn"],
          msd: ["msd", "sgn"],
          msi: ["msi", "ms"],
          msr: ["msr", "sgn"],
          mui: ["mui", "ms"],
          mzc: ["mzc", "sgn"],
          mzg: ["mzg", "sgn"],
          mzy: ["mzy", "sgn"],
          nan: ["nan", "zh"],
          nbs: ["nbs", "sgn"],
          ncs: ["ncs", "sgn"],
          nsi: ["nsi", "sgn"],
          nsl: ["nsl", "sgn"],
          nsp: ["nsp", "sgn"],
          nsr: ["nsr", "sgn"],
          nzs: ["nzs", "sgn"],
          okl: ["okl", "sgn"],
          orn: ["orn", "ms"],
          ors: ["ors", "ms"],
          pel: ["pel", "ms"],
          pga: ["pga", "ar"],
          pks: ["pks", "sgn"],
          prl: ["prl", "sgn"],
          prz: ["prz", "sgn"],
          psc: ["psc", "sgn"],
          psd: ["psd", "sgn"],
          pse: ["pse", "ms"],
          psg: ["psg", "sgn"],
          psl: ["psl", "sgn"],
          pso: ["pso", "sgn"],
          psp: ["psp", "sgn"],
          psr: ["psr", "sgn"],
          pys: ["pys", "sgn"],
          rms: ["rms", "sgn"],
          rsi: ["rsi", "sgn"],
          rsl: ["rsl", "sgn"],
          sdl: ["sdl", "sgn"],
          sfb: ["sfb", "sgn"],
          sfs: ["sfs", "sgn"],
          sgg: ["sgg", "sgn"],
          sgx: ["sgx", "sgn"],
          shu: ["shu", "ar"],
          slf: ["slf", "sgn"],
          sls: ["sls", "sgn"],
          sqk: ["sqk", "sgn"],
          sqs: ["sqs", "sgn"],
          ssh: ["ssh", "ar"],
          ssp: ["ssp", "sgn"],
          ssr: ["ssr", "sgn"],
          svk: ["svk", "sgn"],
          swc: ["swc", "sw"],
          swh: ["swh", "sw"],
          swl: ["swl", "sgn"],
          syy: ["syy", "sgn"],
          tmw: ["tmw", "ms"],
          tse: ["tse", "sgn"],
          tsm: ["tsm", "sgn"],
          tsq: ["tsq", "sgn"],
          tss: ["tss", "sgn"],
          tsy: ["tsy", "sgn"],
          tza: ["tza", "sgn"],
          ugn: ["ugn", "sgn"],
          ugy: ["ugy", "sgn"],
          ukl: ["ukl", "sgn"],
          uks: ["uks", "sgn"],
          urk: ["urk", "ms"],
          uzn: ["uzn", "uz"],
          uzs: ["uzs", "uz"],
          vgt: ["vgt", "sgn"],
          vkk: ["vkk", "ms"],
          vkt: ["vkt", "ms"],
          vsi: ["vsi", "sgn"],
          vsl: ["vsl", "sgn"],
          vsv: ["vsv", "sgn"],
          wuu: ["wuu", "zh"],
          xki: ["xki", "sgn"],
          xml: ["xml", "sgn"],
          xmm: ["xmm", "ms"],
          xms: ["xms", "sgn"],
          yds: ["yds", "sgn"],
          ysl: ["ysl", "sgn"],
          yue: ["yue", "zh"],
          zib: ["zib", "sgn"],
          zlm: ["zlm", "ms"],
          zmi: ["zmi", "ms"],
          zsl: ["zsl", "sgn"],
          zsm: ["zsm", "ms"]
      }
  };

  /**
   * Convert only a-z to uppercase as per section 6.1 of the spec
   */
  function toLatinUpperCase(str) {
      var i = str.length;

      while (i--) {
          var ch = str.charAt(i);

          if (ch >= "a" && ch <= "z") str = str.slice(0, i) + ch.toUpperCase() + str.slice(i + 1);
      }

      return str;
  }

  /**
   * The IsStructurallyValidLanguageTag abstract operation verifies that the locale
   * argument (which must be a String value)
   *
   * - represents a well-formed BCP 47 language tag as specified in RFC 5646 section
   *   2.1, or successor,
   * - does not include duplicate variant subtags, and
   * - does not include duplicate singleton subtags.
   *
   * The abstract operation returns true if locale can be generated from the ABNF
   * grammar in section 2.1 of the RFC, starting with Language-Tag, and does not
   * contain duplicate variant or singleton subtags (other than as a private use
   * subtag). It returns false otherwise. Terminal value characters in the grammar are
   * interpreted as the Unicode equivalents of the ASCII octet values given.
   */
  function /* 6.2.2 */IsStructurallyValidLanguageTag(locale) {
      // represents a well-formed BCP 47 language tag as specified in RFC 5646
      if (!expBCP47Syntax.test(locale)) return false;

      // does not include duplicate variant subtags, and
      if (expVariantDupes.test(locale)) return false;

      // does not include duplicate singleton subtags.
      if (expSingletonDupes.test(locale)) return false;

      return true;
  }

  /**
   * The CanonicalizeLanguageTag abstract operation returns the canonical and case-
   * regularized form of the locale argument (which must be a String value that is
   * a structurally valid BCP 47 language tag as verified by the
   * IsStructurallyValidLanguageTag abstract operation). It takes the steps
   * specified in RFC 5646 section 4.5, or successor, to bring the language tag
   * into canonical form, and to regularize the case of the subtags, but does not
   * take the steps to bring a language tag into “extlang form” and to reorder
   * variant subtags.

   * The specifications for extensions to BCP 47 language tags, such as RFC 6067,
   * may include canonicalization rules for the extension subtag sequences they
   * define that go beyond the canonicalization rules of RFC 5646 section 4.5.
   * Implementations are allowed, but not required, to apply these additional rules.
   */
  function /* 6.2.3 */CanonicalizeLanguageTag(locale) {
      var match = void 0,
          parts = void 0;

      // A language tag is in 'canonical form' when the tag is well-formed
      // according to the rules in Sections 2.1 and 2.2

      // Section 2.1 says all subtags use lowercase...
      locale = locale.toLowerCase();

      // ...with 2 exceptions: 'two-letter and four-letter subtags that neither
      // appear at the start of the tag nor occur after singletons.  Such two-letter
      // subtags are all uppercase (as in the tags "en-CA-x-ca" or "sgn-BE-FR") and
      // four-letter subtags are titlecase (as in the tag "az-Latn-x-latn").
      parts = locale.split('-');
      for (var i = 1, max = parts.length; i < max; i++) {
          // Two-letter subtags are all uppercase
          if (parts[i].length === 2) parts[i] = parts[i].toUpperCase();

          // Four-letter subtags are titlecase
          else if (parts[i].length === 4) parts[i] = parts[i].charAt(0).toUpperCase() + parts[i].slice(1);

              // Is it a singleton?
              else if (parts[i].length === 1 && parts[i] !== 'x') break;
      }
      locale = arrJoin.call(parts, '-');

      // The steps laid out in RFC 5646 section 4.5 are as follows:

      // 1.  Extension sequences are ordered into case-insensitive ASCII order
      //     by singleton subtag.
      if ((match = locale.match(expExtSequences)) && match.length > 1) {
          // The built-in sort() sorts by ASCII order, so use that
          match.sort();

          // Replace all extensions with the joined, sorted array
          locale = locale.replace(RegExp('(?:' + expExtSequences.source + ')+', 'i'), arrJoin.call(match, ''));
      }

      // 2.  Redundant or grandfathered tags are replaced by their 'Preferred-
      //     Value', if there is one.
      if (hop.call(redundantTags.tags, locale)) locale = redundantTags.tags[locale];

      // 3.  Subtags are replaced by their 'Preferred-Value', if there is one.
      //     For extlangs, the original primary language subtag is also
      //     replaced if there is a primary language subtag in the 'Preferred-
      //     Value'.
      parts = locale.split('-');

      for (var _i = 1, _max = parts.length; _i < _max; _i++) {
          if (hop.call(redundantTags.subtags, parts[_i])) parts[_i] = redundantTags.subtags[parts[_i]];else if (hop.call(redundantTags.extLang, parts[_i])) {
              parts[_i] = redundantTags.extLang[parts[_i]][0];

              // For extlang tags, the prefix needs to be removed if it is redundant
              if (_i === 1 && redundantTags.extLang[parts[1]][1] === parts[0]) {
                  parts = arrSlice.call(parts, _i++);
                  _max -= 1;
              }
          }
      }

      return arrJoin.call(parts, '-');
  }

  /**
   * The DefaultLocale abstract operation returns a String value representing the
   * structurally valid (6.2.2) and canonicalized (6.2.3) BCP 47 language tag for the
   * host environment’s current locale.
   */
  function /* 6.2.4 */DefaultLocale() {
      return defaultLocale;
  }

  // Sect 6.3 Currency Codes
  // =======================

  var expCurrencyCode = /^[A-Z]{3}$/;

  /**
   * The IsWellFormedCurrencyCode abstract operation verifies that the currency argument
   * (after conversion to a String value) represents a well-formed 3-letter ISO currency
   * code. The following steps are taken:
   */
  function /* 6.3.1 */IsWellFormedCurrencyCode(currency) {
      // 1. Let `c` be ToString(currency)
      var c = String(currency);

      // 2. Let `normalized` be the result of mapping c to upper case as described
      //    in 6.1.
      var normalized = toLatinUpperCase(c);

      // 3. If the string length of normalized is not 3, return false.
      // 4. If normalized contains any character that is not in the range "A" to "Z"
      //    (U+0041 to U+005A), return false.
      if (expCurrencyCode.test(normalized) === false) return false;

      // 5. Return true
      return true;
  }

  var expUnicodeExSeq = /-u(?:-[0-9a-z]{2,8})+/gi; // See `extension` below

  function /* 9.2.1 */CanonicalizeLocaleList(locales) {
      // The abstract operation CanonicalizeLocaleList takes the following steps:

      // 1. If locales is undefined, then a. Return a new empty List
      if (locales === undefined) return new List();

      // 2. Let seen be a new empty List.
      var seen = new List();

      // 3. If locales is a String value, then
      //    a. Let locales be a new array created as if by the expression new
      //    Array(locales) where Array is the standard built-in constructor with
      //    that name and locales is the value of locales.
      locales = typeof locales === 'string' ? [locales] : locales;

      // 4. Let O be ToObject(locales).
      var O = toObject(locales);

      // 5. Let lenValue be the result of calling the [[Get]] internal method of
      //    O with the argument "length".
      // 6. Let len be ToUint32(lenValue).
      var len = toLength(O.length);

      // 7. Let k be 0.
      var k = 0;

      // 8. Repeat, while k < len
      while (k < len) {
          // a. Let Pk be ToString(k).
          var Pk = String(k);

          // b. Let kPresent be the result of calling the [[HasProperty]] internal
          //    method of O with argument Pk.
          var kPresent = Pk in O;

          // c. If kPresent is true, then
          if (kPresent) {
              // i. Let kValue be the result of calling the [[Get]] internal
              //     method of O with argument Pk.
              var kValue = O[Pk];

              // ii. If the type of kValue is not String or Object, then throw a
              //     TypeError exception.
              if (kValue === null || typeof kValue !== 'string' && (typeof kValue === "undefined" ? "undefined" : babelHelpers$1["typeof"](kValue)) !== 'object') throw new TypeError('String or Object type expected');

              // iii. Let tag be ToString(kValue).
              var tag = String(kValue);

              // iv. If the result of calling the abstract operation
              //     IsStructurallyValidLanguageTag (defined in 6.2.2), passing tag as
              //     the argument, is false, then throw a RangeError exception.
              if (!IsStructurallyValidLanguageTag(tag)) throw new RangeError("'" + tag + "' is not a structurally valid language tag");

              // v. Let tag be the result of calling the abstract operation
              //    CanonicalizeLanguageTag (defined in 6.2.3), passing tag as the
              //    argument.
              tag = CanonicalizeLanguageTag(tag);

              // vi. If tag is not an element of seen, then append tag as the last
              //     element of seen.
              if (arrIndexOf.call(seen, tag) === -1) arrPush.call(seen, tag);
          }

          // d. Increase k by 1.
          k++;
      }

      // 9. Return seen.
      return seen;
  }

  /**
   * The BestAvailableLocale abstract operation compares the provided argument
   * locale, which must be a String value with a structurally valid and
   * canonicalized BCP 47 language tag, against the locales in availableLocales and
   * returns either the longest non-empty prefix of locale that is an element of
   * availableLocales, or undefined if there is no such element. It uses the
   * fallback mechanism of RFC 4647, section 3.4. The following steps are taken:
   */
  function /* 9.2.2 */BestAvailableLocale(availableLocales, locale) {
      // 1. Let candidate be locale
      var candidate = locale;

      // 2. Repeat
      while (candidate) {
          // a. If availableLocales contains an element equal to candidate, then return
          // candidate.
          if (arrIndexOf.call(availableLocales, candidate) > -1) return candidate;

          // b. Let pos be the character index of the last occurrence of "-"
          // (U+002D) within candidate. If that character does not occur, return
          // undefined.
          var pos = candidate.lastIndexOf('-');

          if (pos < 0) return;

          // c. If pos ≥ 2 and the character "-" occurs at index pos-2 of candidate,
          //    then decrease pos by 2.
          if (pos >= 2 && candidate.charAt(pos - 2) === '-') pos -= 2;

          // d. Let candidate be the substring of candidate from position 0, inclusive,
          //    to position pos, exclusive.
          candidate = candidate.substring(0, pos);
      }
  }

  /**
   * The LookupMatcher abstract operation compares requestedLocales, which must be
   * a List as returned by CanonicalizeLocaleList, against the locales in
   * availableLocales and determines the best available language to meet the
   * request. The following steps are taken:
   */
  function /* 9.2.3 */LookupMatcher(availableLocales, requestedLocales) {
      // 1. Let i be 0.
      var i = 0;

      // 2. Let len be the number of elements in requestedLocales.
      var len = requestedLocales.length;

      // 3. Let availableLocale be undefined.
      var availableLocale = void 0;

      var locale = void 0,
          noExtensionsLocale = void 0;

      // 4. Repeat while i < len and availableLocale is undefined:
      while (i < len && !availableLocale) {
          // a. Let locale be the element of requestedLocales at 0-origined list
          //    position i.
          locale = requestedLocales[i];

          // b. Let noExtensionsLocale be the String value that is locale with all
          //    Unicode locale extension sequences removed.
          noExtensionsLocale = String(locale).replace(expUnicodeExSeq, '');

          // c. Let availableLocale be the result of calling the
          //    BestAvailableLocale abstract operation (defined in 9.2.2) with
          //    arguments availableLocales and noExtensionsLocale.
          availableLocale = BestAvailableLocale(availableLocales, noExtensionsLocale);

          // d. Increase i by 1.
          i++;
      }

      // 5. Let result be a new Record.
      var result = new Record();

      // 6. If availableLocale is not undefined, then
      if (availableLocale !== undefined) {
          // a. Set result.[[locale]] to availableLocale.
          result['[[locale]]'] = availableLocale;

          // b. If locale and noExtensionsLocale are not the same String value, then
          if (String(locale) !== String(noExtensionsLocale)) {
              // i. Let extension be the String value consisting of the first
              //    substring of locale that is a Unicode locale extension sequence.
              var extension = locale.match(expUnicodeExSeq)[0];

              // ii. Let extensionIndex be the character position of the initial
              //     "-" of the first Unicode locale extension sequence within locale.
              var extensionIndex = locale.indexOf('-u-');

              // iii. Set result.[[extension]] to extension.
              result['[[extension]]'] = extension;

              // iv. Set result.[[extensionIndex]] to extensionIndex.
              result['[[extensionIndex]]'] = extensionIndex;
          }
      }
      // 7. Else
      else
          // a. Set result.[[locale]] to the value returned by the DefaultLocale abstract
          //    operation (defined in 6.2.4).
          result['[[locale]]'] = DefaultLocale();

      // 8. Return result
      return result;
  }

  /**
   * The BestFitMatcher abstract operation compares requestedLocales, which must be
   * a List as returned by CanonicalizeLocaleList, against the locales in
   * availableLocales and determines the best available language to meet the
   * request. The algorithm is implementation dependent, but should produce results
   * that a typical user of the requested locales would perceive as at least as
   * good as those produced by the LookupMatcher abstract operation. Options
   * specified through Unicode locale extension sequences must be ignored by the
   * algorithm. Information about such subsequences is returned separately.
   * The abstract operation returns a record with a [[locale]] field, whose value
   * is the language tag of the selected locale, which must be an element of
   * availableLocales. If the language tag of the request locale that led to the
   * selected locale contained a Unicode locale extension sequence, then the
   * returned record also contains an [[extension]] field whose value is the first
   * Unicode locale extension sequence, and an [[extensionIndex]] field whose value
   * is the index of the first Unicode locale extension sequence within the request
   * locale language tag.
   */
  function /* 9.2.4 */BestFitMatcher(availableLocales, requestedLocales) {
      return LookupMatcher(availableLocales, requestedLocales);
  }

  /**
   * The ResolveLocale abstract operation compares a BCP 47 language priority list
   * requestedLocales against the locales in availableLocales and determines the
   * best available language to meet the request. availableLocales and
   * requestedLocales must be provided as List values, options as a Record.
   */
  function /* 9.2.5 */ResolveLocale(availableLocales, requestedLocales, options, relevantExtensionKeys, localeData) {
      if (availableLocales.length === 0) {
          throw new ReferenceError('No locale data has been provided for this object yet.');
      }

      // The following steps are taken:
      // 1. Let matcher be the value of options.[[localeMatcher]].
      var matcher = options['[[localeMatcher]]'];

      var r = void 0;

      // 2. If matcher is "lookup", then
      if (matcher === 'lookup')
          // a. Let r be the result of calling the LookupMatcher abstract operation
          //    (defined in 9.2.3) with arguments availableLocales and
          //    requestedLocales.
          r = LookupMatcher(availableLocales, requestedLocales);

          // 3. Else
      else
          // a. Let r be the result of calling the BestFitMatcher abstract
          //    operation (defined in 9.2.4) with arguments availableLocales and
          //    requestedLocales.
          r = BestFitMatcher(availableLocales, requestedLocales);

      // 4. Let foundLocale be the value of r.[[locale]].
      var foundLocale = r['[[locale]]'];

      var extensionSubtags = void 0,
          extensionSubtagsLength = void 0;

      // 5. If r has an [[extension]] field, then
      if (hop.call(r, '[[extension]]')) {
          // a. Let extension be the value of r.[[extension]].
          var extension = r['[[extension]]'];
          // b. Let split be the standard built-in function object defined in ES5,
          //    15.5.4.14.
          var split = String.prototype.split;
          // c. Let extensionSubtags be the result of calling the [[Call]] internal
          //    method of split with extension as the this value and an argument
          //    list containing the single item "-".
          extensionSubtags = split.call(extension, '-');
          // d. Let extensionSubtagsLength be the result of calling the [[Get]]
          //    internal method of extensionSubtags with argument "length".
          extensionSubtagsLength = extensionSubtags.length;
      }

      // 6. Let result be a new Record.
      var result = new Record();

      // 7. Set result.[[dataLocale]] to foundLocale.
      result['[[dataLocale]]'] = foundLocale;

      // 8. Let supportedExtension be "-u".
      var supportedExtension = '-u';
      // 9. Let i be 0.
      var i = 0;
      // 10. Let len be the result of calling the [[Get]] internal method of
      //     relevantExtensionKeys with argument "length".
      var len = relevantExtensionKeys.length;

      // 11 Repeat while i < len:
      while (i < len) {
          // a. Let key be the result of calling the [[Get]] internal method of
          //    relevantExtensionKeys with argument ToString(i).
          var key = relevantExtensionKeys[i];
          // b. Let foundLocaleData be the result of calling the [[Get]] internal
          //    method of localeData with the argument foundLocale.
          var foundLocaleData = localeData[foundLocale];
          // c. Let keyLocaleData be the result of calling the [[Get]] internal
          //    method of foundLocaleData with the argument key.
          var keyLocaleData = foundLocaleData[key];
          // d. Let value be the result of calling the [[Get]] internal method of
          //    keyLocaleData with argument "0".
          var value = keyLocaleData['0'];
          // e. Let supportedExtensionAddition be "".
          var supportedExtensionAddition = '';
          // f. Let indexOf be the standard built-in function object defined in
          //    ES5, 15.4.4.14.
          var indexOf = arrIndexOf;

          // g. If extensionSubtags is not undefined, then
          if (extensionSubtags !== undefined) {
              // i. Let keyPos be the result of calling the [[Call]] internal
              //    method of indexOf with extensionSubtags as the this value and
              // an argument list containing the single item key.
              var keyPos = indexOf.call(extensionSubtags, key);

              // ii. If keyPos ≠ -1, then
              if (keyPos !== -1) {
                  // 1. If keyPos + 1 < extensionSubtagsLength and the length of the
                  //    result of calling the [[Get]] internal method of
                  //    extensionSubtags with argument ToString(keyPos +1) is greater
                  //    than 2, then
                  if (keyPos + 1 < extensionSubtagsLength && extensionSubtags[keyPos + 1].length > 2) {
                      // a. Let requestedValue be the result of calling the [[Get]]
                      //    internal method of extensionSubtags with argument
                      //    ToString(keyPos + 1).
                      var requestedValue = extensionSubtags[keyPos + 1];
                      // b. Let valuePos be the result of calling the [[Call]]
                      //    internal method of indexOf with keyLocaleData as the
                      //    this value and an argument list containing the single
                      //    item requestedValue.
                      var valuePos = indexOf.call(keyLocaleData, requestedValue);

                      // c. If valuePos ≠ -1, then
                      if (valuePos !== -1) {
                          // i. Let value be requestedValue.
                          value = requestedValue,
                          // ii. Let supportedExtensionAddition be the
                          //     concatenation of "-", key, "-", and value.
                          supportedExtensionAddition = '-' + key + '-' + value;
                      }
                  }
                  // 2. Else
                  else {
                          // a. Let valuePos be the result of calling the [[Call]]
                          // internal method of indexOf with keyLocaleData as the this
                          // value and an argument list containing the single item
                          // "true".
                          var _valuePos = indexOf(keyLocaleData, 'true');

                          // b. If valuePos ≠ -1, then
                          if (_valuePos !== -1)
                              // i. Let value be "true".
                              value = 'true';
                      }
              }
          }
          // h. If options has a field [[<key>]], then
          if (hop.call(options, '[[' + key + ']]')) {
              // i. Let optionsValue be the value of options.[[<key>]].
              var optionsValue = options['[[' + key + ']]'];

              // ii. If the result of calling the [[Call]] internal method of indexOf
              //     with keyLocaleData as the this value and an argument list
              //     containing the single item optionsValue is not -1, then
              if (indexOf.call(keyLocaleData, optionsValue) !== -1) {
                  // 1. If optionsValue is not equal to value, then
                  if (optionsValue !== value) {
                      // a. Let value be optionsValue.
                      value = optionsValue;
                      // b. Let supportedExtensionAddition be "".
                      supportedExtensionAddition = '';
                  }
              }
          }
          // i. Set result.[[<key>]] to value.
          result['[[' + key + ']]'] = value;

          // j. Append supportedExtensionAddition to supportedExtension.
          supportedExtension += supportedExtensionAddition;

          // k. Increase i by 1.
          i++;
      }
      // 12. If the length of supportedExtension is greater than 2, then
      if (supportedExtension.length > 2) {
          // a.
          var privateIndex = foundLocale.indexOf("-x-");
          // b.
          if (privateIndex === -1) {
              // i.
              foundLocale = foundLocale + supportedExtension;
          }
          // c.
          else {
                  // i.
                  var preExtension = foundLocale.substring(0, privateIndex);
                  // ii.
                  var postExtension = foundLocale.substring(privateIndex);
                  // iii.
                  foundLocale = preExtension + supportedExtension + postExtension;
              }
          // d. asserting - skipping
          // e.
          foundLocale = CanonicalizeLanguageTag(foundLocale);
      }
      // 13. Set result.[[locale]] to foundLocale.
      result['[[locale]]'] = foundLocale;

      // 14. Return result.
      return result;
  }

  /**
   * The LookupSupportedLocales abstract operation returns the subset of the
   * provided BCP 47 language priority list requestedLocales for which
   * availableLocales has a matching locale when using the BCP 47 Lookup algorithm.
   * Locales appear in the same order in the returned list as in requestedLocales.
   * The following steps are taken:
   */
  function /* 9.2.6 */LookupSupportedLocales(availableLocales, requestedLocales) {
      // 1. Let len be the number of elements in requestedLocales.
      var len = requestedLocales.length;
      // 2. Let subset be a new empty List.
      var subset = new List();
      // 3. Let k be 0.
      var k = 0;

      // 4. Repeat while k < len
      while (k < len) {
          // a. Let locale be the element of requestedLocales at 0-origined list
          //    position k.
          var locale = requestedLocales[k];
          // b. Let noExtensionsLocale be the String value that is locale with all
          //    Unicode locale extension sequences removed.
          var noExtensionsLocale = String(locale).replace(expUnicodeExSeq, '');
          // c. Let availableLocale be the result of calling the
          //    BestAvailableLocale abstract operation (defined in 9.2.2) with
          //    arguments availableLocales and noExtensionsLocale.
          var availableLocale = BestAvailableLocale(availableLocales, noExtensionsLocale);

          // d. If availableLocale is not undefined, then append locale to the end of
          //    subset.
          if (availableLocale !== undefined) arrPush.call(subset, locale);

          // e. Increment k by 1.
          k++;
      }

      // 5. Let subsetArray be a new Array object whose elements are the same
      //    values in the same order as the elements of subset.
      var subsetArray = arrSlice.call(subset);

      // 6. Return subsetArray.
      return subsetArray;
  }

  /**
   * The BestFitSupportedLocales abstract operation returns the subset of the
   * provided BCP 47 language priority list requestedLocales for which
   * availableLocales has a matching locale when using the Best Fit Matcher
   * algorithm. Locales appear in the same order in the returned list as in
   * requestedLocales. The steps taken are implementation dependent.
   */
  function /*9.2.7 */BestFitSupportedLocales(availableLocales, requestedLocales) {
      // ###TODO: implement this function as described by the specification###
      return LookupSupportedLocales(availableLocales, requestedLocales);
  }

  /**
   * The SupportedLocales abstract operation returns the subset of the provided BCP
   * 47 language priority list requestedLocales for which availableLocales has a
   * matching locale. Two algorithms are available to match the locales: the Lookup
   * algorithm described in RFC 4647 section 3.4, and an implementation dependent
   * best-fit algorithm. Locales appear in the same order in the returned list as
   * in requestedLocales. The following steps are taken:
   */
  function /*9.2.8 */SupportedLocales(availableLocales, requestedLocales, options) {
      var matcher = void 0,
          subset = void 0;

      // 1. If options is not undefined, then
      if (options !== undefined) {
          // a. Let options be ToObject(options).
          options = new Record(toObject(options));
          // b. Let matcher be the result of calling the [[Get]] internal method of
          //    options with argument "localeMatcher".
          matcher = options.localeMatcher;

          // c. If matcher is not undefined, then
          if (matcher !== undefined) {
              // i. Let matcher be ToString(matcher).
              matcher = String(matcher);

              // ii. If matcher is not "lookup" or "best fit", then throw a RangeError
              //     exception.
              if (matcher !== 'lookup' && matcher !== 'best fit') throw new RangeError('matcher should be "lookup" or "best fit"');
          }
      }
      // 2. If matcher is undefined or "best fit", then
      if (matcher === undefined || matcher === 'best fit')
          // a. Let subset be the result of calling the BestFitSupportedLocales
          //    abstract operation (defined in 9.2.7) with arguments
          //    availableLocales and requestedLocales.
          subset = BestFitSupportedLocales(availableLocales, requestedLocales);
          // 3. Else
      else
          // a. Let subset be the result of calling the LookupSupportedLocales
          //    abstract operation (defined in 9.2.6) with arguments
          //    availableLocales and requestedLocales.
          subset = LookupSupportedLocales(availableLocales, requestedLocales);

      // 4. For each named own property name P of subset,
      for (var P in subset) {
          if (!hop.call(subset, P)) continue;

          // a. Let desc be the result of calling the [[GetOwnProperty]] internal
          //    method of subset with P.
          // b. Set desc.[[Writable]] to false.
          // c. Set desc.[[Configurable]] to false.
          // d. Call the [[DefineOwnProperty]] internal method of subset with P, desc,
          //    and true as arguments.
          defineProperty(subset, P, {
              writable: false, configurable: false, value: subset[P]
          });
      }
      // "Freeze" the array so no new elements can be added
      defineProperty(subset, 'length', { writable: false });

      // 5. Return subset
      return subset;
  }

  /**
   * The GetOption abstract operation extracts the value of the property named
   * property from the provided options object, converts it to the required type,
   * checks whether it is one of a List of allowed values, and fills in a fallback
   * value if necessary.
   */
  function /*9.2.9 */GetOption(options, property, type, values, fallback) {
      // 1. Let value be the result of calling the [[Get]] internal method of
      //    options with argument property.
      var value = options[property];

      // 2. If value is not undefined, then
      if (value !== undefined) {
          // a. Assert: type is "boolean" or "string".
          // b. If type is "boolean", then let value be ToBoolean(value).
          // c. If type is "string", then let value be ToString(value).
          value = type === 'boolean' ? Boolean(value) : type === 'string' ? String(value) : value;

          // d. If values is not undefined, then
          if (values !== undefined) {
              // i. If values does not contain an element equal to value, then throw a
              //    RangeError exception.
              if (arrIndexOf.call(values, value) === -1) throw new RangeError("'" + value + "' is not an allowed value for `" + property + '`');
          }

          // e. Return value.
          return value;
      }
      // Else return fallback.
      return fallback;
  }

  /**
   * The GetNumberOption abstract operation extracts a property value from the
   * provided options object, converts it to a Number value, checks whether it is
   * in the allowed range, and fills in a fallback value if necessary.
   */
  function /* 9.2.10 */GetNumberOption(options, property, minimum, maximum, fallback) {
      // 1. Let value be the result of calling the [[Get]] internal method of
      //    options with argument property.
      var value = options[property];

      // 2. If value is not undefined, then
      if (value !== undefined) {
          // a. Let value be ToNumber(value).
          value = Number(value);

          // b. If value is NaN or less than minimum or greater than maximum, throw a
          //    RangeError exception.
          if (isNaN(value) || value < minimum || value > maximum) throw new RangeError('Value is not a number or outside accepted range');

          // c. Return floor(value).
          return Math.floor(value);
      }
      // 3. Else return fallback.
      return fallback;
  }

  // 8 The Intl Object
  var Intl$1 = {};

  // 8.2 Function Properties of the Intl Object

  // 8.2.1
  // @spec[tc39/ecma402/master/spec/intl.html]
  // @clause[sec-intl.getcanonicallocales]
  function getCanonicalLocales(locales) {
      // 1. Let ll be ? CanonicalizeLocaleList(locales).
      var ll = CanonicalizeLocaleList(locales);
      // 2. Return CreateArrayFromList(ll).
      {
          var result = [];

          var len = ll.length;
          var k = 0;

          while (k < len) {
              result[k] = ll[k];
              k++;
          }
          return result;
      }
  }

  Object.defineProperty(Intl$1, 'getCanonicalLocales', {
      enumerable: false,
      configurable: true,
      writable: true,
      value: getCanonicalLocales
  });

  // Currency minor units output from get-4217 grunt task, formatted
  var currencyMinorUnits = {
      BHD: 3, BYR: 0, XOF: 0, BIF: 0, XAF: 0, CLF: 4, CLP: 0, KMF: 0, DJF: 0,
      XPF: 0, GNF: 0, ISK: 0, IQD: 3, JPY: 0, JOD: 3, KRW: 0, KWD: 3, LYD: 3,
      OMR: 3, PYG: 0, RWF: 0, TND: 3, UGX: 0, UYI: 0, VUV: 0, VND: 0
  };

  // Define the NumberFormat constructor internally so it cannot be tainted
  function NumberFormatConstructor() {
      var locales = arguments[0];
      var options = arguments[1];

      if (!this || this === Intl$1) {
          return new Intl$1.NumberFormat(locales, options);
      }

      return InitializeNumberFormat(toObject(this), locales, options);
  }

  defineProperty(Intl$1, 'NumberFormat', {
      configurable: true,
      writable: true,
      value: NumberFormatConstructor
  });

  // Must explicitly set prototypes as unwritable
  defineProperty(Intl$1.NumberFormat, 'prototype', {
      writable: false
  });

  /**
   * The abstract operation InitializeNumberFormat accepts the arguments
   * numberFormat (which must be an object), locales, and options. It initializes
   * numberFormat as a NumberFormat object.
   */
  function /*11.1.1.1 */InitializeNumberFormat(numberFormat, locales, options) {
      // This will be a internal properties object if we're not already initialized
      var internal = getInternalProperties(numberFormat);

      // Create an object whose props can be used to restore the values of RegExp props
      var regexpRestore = createRegExpRestore();

      // 1. If numberFormat has an [[initializedIntlObject]] internal property with
      // value true, throw a TypeError exception.
      if (internal['[[initializedIntlObject]]'] === true) throw new TypeError('`this` object has already been initialized as an Intl object');

      // Need this to access the `internal` object
      defineProperty(numberFormat, '__getInternalProperties', {
          value: function value() {
              // NOTE: Non-standard, for internal use only
              if (arguments[0] === secret) return internal;
          }
      });

      // 2. Set the [[initializedIntlObject]] internal property of numberFormat to true.
      internal['[[initializedIntlObject]]'] = true;

      // 3. Let requestedLocales be the result of calling the CanonicalizeLocaleList
      //    abstract operation (defined in 9.2.1) with argument locales.
      var requestedLocales = CanonicalizeLocaleList(locales);

      // 4. If options is undefined, then
      if (options === undefined)
          // a. Let options be the result of creating a new object as if by the
          // expression new Object() where Object is the standard built-in constructor
          // with that name.
          options = {};

          // 5. Else
      else
          // a. Let options be ToObject(options).
          options = toObject(options);

      // 6. Let opt be a new Record.
      var opt = new Record(),


      // 7. Let matcher be the result of calling the GetOption abstract operation
      //    (defined in 9.2.9) with the arguments options, "localeMatcher", "string",
      //    a List containing the two String values "lookup" and "best fit", and
      //    "best fit".
      matcher = GetOption(options, 'localeMatcher', 'string', new List('lookup', 'best fit'), 'best fit');

      // 8. Set opt.[[localeMatcher]] to matcher.
      opt['[[localeMatcher]]'] = matcher;

      // 9. Let NumberFormat be the standard built-in object that is the initial value
      //    of Intl.NumberFormat.
      // 10. Let localeData be the value of the [[localeData]] internal property of
      //     NumberFormat.
      var localeData = internals.NumberFormat['[[localeData]]'];

      // 11. Let r be the result of calling the ResolveLocale abstract operation
      //     (defined in 9.2.5) with the [[availableLocales]] internal property of
      //     NumberFormat, requestedLocales, opt, the [[relevantExtensionKeys]]
      //     internal property of NumberFormat, and localeData.
      var r = ResolveLocale(internals.NumberFormat['[[availableLocales]]'], requestedLocales, opt, internals.NumberFormat['[[relevantExtensionKeys]]'], localeData);

      // 12. Set the [[locale]] internal property of numberFormat to the value of
      //     r.[[locale]].
      internal['[[locale]]'] = r['[[locale]]'];

      // 13. Set the [[numberingSystem]] internal property of numberFormat to the value
      //     of r.[[nu]].
      internal['[[numberingSystem]]'] = r['[[nu]]'];

      // The specification doesn't tell us to do this, but it's helpful later on
      internal['[[dataLocale]]'] = r['[[dataLocale]]'];

      // 14. Let dataLocale be the value of r.[[dataLocale]].
      var dataLocale = r['[[dataLocale]]'];

      // 15. Let s be the result of calling the GetOption abstract operation with the
      //     arguments options, "style", "string", a List containing the three String
      //     values "decimal", "percent", and "currency", and "decimal".
      var s = GetOption(options, 'style', 'string', new List('decimal', 'percent', 'currency'), 'decimal');

      // 16. Set the [[style]] internal property of numberFormat to s.
      internal['[[style]]'] = s;

      // 17. Let c be the result of calling the GetOption abstract operation with the
      //     arguments options, "currency", "string", undefined, and undefined.
      var c = GetOption(options, 'currency', 'string');

      // 18. If c is not undefined and the result of calling the
      //     IsWellFormedCurrencyCode abstract operation (defined in 6.3.1) with
      //     argument c is false, then throw a RangeError exception.
      if (c !== undefined && !IsWellFormedCurrencyCode(c)) throw new RangeError("'" + c + "' is not a valid currency code");

      // 19. If s is "currency" and c is undefined, throw a TypeError exception.
      if (s === 'currency' && c === undefined) throw new TypeError('Currency code is required when style is currency');

      var cDigits = void 0;

      // 20. If s is "currency", then
      if (s === 'currency') {
          // a. Let c be the result of converting c to upper case as specified in 6.1.
          c = c.toUpperCase();

          // b. Set the [[currency]] internal property of numberFormat to c.
          internal['[[currency]]'] = c;

          // c. Let cDigits be the result of calling the CurrencyDigits abstract
          //    operation (defined below) with argument c.
          cDigits = CurrencyDigits(c);
      }

      // 21. Let cd be the result of calling the GetOption abstract operation with the
      //     arguments options, "currencyDisplay", "string", a List containing the
      //     three String values "code", "symbol", and "name", and "symbol".
      var cd = GetOption(options, 'currencyDisplay', 'string', new List('code', 'symbol', 'name'), 'symbol');

      // 22. If s is "currency", then set the [[currencyDisplay]] internal property of
      //     numberFormat to cd.
      if (s === 'currency') internal['[[currencyDisplay]]'] = cd;

      // 23. Let mnid be the result of calling the GetNumberOption abstract operation
      //     (defined in 9.2.10) with arguments options, "minimumIntegerDigits", 1, 21,
      //     and 1.
      var mnid = GetNumberOption(options, 'minimumIntegerDigits', 1, 21, 1);

      // 24. Set the [[minimumIntegerDigits]] internal property of numberFormat to mnid.
      internal['[[minimumIntegerDigits]]'] = mnid;

      // 25. If s is "currency", then let mnfdDefault be cDigits; else let mnfdDefault
      //     be 0.
      var mnfdDefault = s === 'currency' ? cDigits : 0;

      // 26. Let mnfd be the result of calling the GetNumberOption abstract operation
      //     with arguments options, "minimumFractionDigits", 0, 20, and mnfdDefault.
      var mnfd = GetNumberOption(options, 'minimumFractionDigits', 0, 20, mnfdDefault);

      // 27. Set the [[minimumFractionDigits]] internal property of numberFormat to mnfd.
      internal['[[minimumFractionDigits]]'] = mnfd;

      // 28. If s is "currency", then let mxfdDefault be max(mnfd, cDigits); else if s
      //     is "percent", then let mxfdDefault be max(mnfd, 0); else let mxfdDefault
      //     be max(mnfd, 3).
      var mxfdDefault = s === 'currency' ? Math.max(mnfd, cDigits) : s === 'percent' ? Math.max(mnfd, 0) : Math.max(mnfd, 3);

      // 29. Let mxfd be the result of calling the GetNumberOption abstract operation
      //     with arguments options, "maximumFractionDigits", mnfd, 20, and mxfdDefault.
      var mxfd = GetNumberOption(options, 'maximumFractionDigits', mnfd, 20, mxfdDefault);

      // 30. Set the [[maximumFractionDigits]] internal property of numberFormat to mxfd.
      internal['[[maximumFractionDigits]]'] = mxfd;

      // 31. Let mnsd be the result of calling the [[Get]] internal method of options
      //     with argument "minimumSignificantDigits".
      var mnsd = options.minimumSignificantDigits;

      // 32. Let mxsd be the result of calling the [[Get]] internal method of options
      //     with argument "maximumSignificantDigits".
      var mxsd = options.maximumSignificantDigits;

      // 33. If mnsd is not undefined or mxsd is not undefined, then:
      if (mnsd !== undefined || mxsd !== undefined) {
          // a. Let mnsd be the result of calling the GetNumberOption abstract
          //    operation with arguments options, "minimumSignificantDigits", 1, 21,
          //    and 1.
          mnsd = GetNumberOption(options, 'minimumSignificantDigits', 1, 21, 1);

          // b. Let mxsd be the result of calling the GetNumberOption abstract
          //     operation with arguments options, "maximumSignificantDigits", mnsd,
          //     21, and 21.
          mxsd = GetNumberOption(options, 'maximumSignificantDigits', mnsd, 21, 21);

          // c. Set the [[minimumSignificantDigits]] internal property of numberFormat
          //    to mnsd, and the [[maximumSignificantDigits]] internal property of
          //    numberFormat to mxsd.
          internal['[[minimumSignificantDigits]]'] = mnsd;
          internal['[[maximumSignificantDigits]]'] = mxsd;
      }
      // 34. Let g be the result of calling the GetOption abstract operation with the
      //     arguments options, "useGrouping", "boolean", undefined, and true.
      var g = GetOption(options, 'useGrouping', 'boolean', undefined, true);

      // 35. Set the [[useGrouping]] internal property of numberFormat to g.
      internal['[[useGrouping]]'] = g;

      // 36. Let dataLocaleData be the result of calling the [[Get]] internal method of
      //     localeData with argument dataLocale.
      var dataLocaleData = localeData[dataLocale];

      // 37. Let patterns be the result of calling the [[Get]] internal method of
      //     dataLocaleData with argument "patterns".
      var patterns = dataLocaleData.patterns;

      // 38. Assert: patterns is an object (see 11.2.3)

      // 39. Let stylePatterns be the result of calling the [[Get]] internal method of
      //     patterns with argument s.
      var stylePatterns = patterns[s];

      // 40. Set the [[positivePattern]] internal property of numberFormat to the
      //     result of calling the [[Get]] internal method of stylePatterns with the
      //     argument "positivePattern".
      internal['[[positivePattern]]'] = stylePatterns.positivePattern;

      // 41. Set the [[negativePattern]] internal property of numberFormat to the
      //     result of calling the [[Get]] internal method of stylePatterns with the
      //     argument "negativePattern".
      internal['[[negativePattern]]'] = stylePatterns.negativePattern;

      // 42. Set the [[boundFormat]] internal property of numberFormat to undefined.
      internal['[[boundFormat]]'] = undefined;

      // 43. Set the [[initializedNumberFormat]] internal property of numberFormat to
      //     true.
      internal['[[initializedNumberFormat]]'] = true;

      // In ES3, we need to pre-bind the format() function
      if (es3) numberFormat.format = GetFormatNumber.call(numberFormat);

      // Restore the RegExp properties
      regexpRestore();

      // Return the newly initialised object
      return numberFormat;
  }

  function CurrencyDigits(currency) {
      // When the CurrencyDigits abstract operation is called with an argument currency
      // (which must be an upper case String value), the following steps are taken:

      // 1. If the ISO 4217 currency and funds code list contains currency as an
      // alphabetic code, then return the minor unit value corresponding to the
      // currency from the list; else return 2.
      return currencyMinorUnits[currency] !== undefined ? currencyMinorUnits[currency] : 2;
  }

  /* 11.2.3 */internals.NumberFormat = {
      '[[availableLocales]]': [],
      '[[relevantExtensionKeys]]': ['nu'],
      '[[localeData]]': {}
  };

  /**
   * When the supportedLocalesOf method of Intl.NumberFormat is called, the
   * following steps are taken:
   */
  /* 11.2.2 */
  defineProperty(Intl$1.NumberFormat, 'supportedLocalesOf', {
      configurable: true,
      writable: true,
      value: fnBind.call(function (locales) {
          // Bound functions only have the `this` value altered if being used as a constructor,
          // this lets us imitate a native function that has no constructor
          if (!hop.call(this, '[[availableLocales]]')) throw new TypeError('supportedLocalesOf() is not a constructor');

          // Create an object whose props can be used to restore the values of RegExp props
          var regexpRestore = createRegExpRestore(),


          // 1. If options is not provided, then let options be undefined.
          options = arguments[1],


          // 2. Let availableLocales be the value of the [[availableLocales]] internal
          //    property of the standard built-in object that is the initial value of
          //    Intl.NumberFormat.

          availableLocales = this['[[availableLocales]]'],


          // 3. Let requestedLocales be the result of calling the CanonicalizeLocaleList
          //    abstract operation (defined in 9.2.1) with argument locales.
          requestedLocales = CanonicalizeLocaleList(locales);

          // Restore the RegExp properties
          regexpRestore();

          // 4. Return the result of calling the SupportedLocales abstract operation
          //    (defined in 9.2.8) with arguments availableLocales, requestedLocales,
          //    and options.
          return SupportedLocales(availableLocales, requestedLocales, options);
      }, internals.NumberFormat)
  });

  /**
   * This named accessor property returns a function that formats a number
   * according to the effective locale and the formatting options of this
   * NumberFormat object.
   */
  /* 11.3.2 */defineProperty(Intl$1.NumberFormat.prototype, 'format', {
      configurable: true,
      get: GetFormatNumber
  });

  function GetFormatNumber() {
      var internal = this !== null && babelHelpers$1["typeof"](this) === 'object' && getInternalProperties(this);

      // Satisfy test 11.3_b
      if (!internal || !internal['[[initializedNumberFormat]]']) throw new TypeError('`this` value for format() is not an initialized Intl.NumberFormat object.');

      // The value of the [[Get]] attribute is a function that takes the following
      // steps:

      // 1. If the [[boundFormat]] internal property of this NumberFormat object
      //    is undefined, then:
      if (internal['[[boundFormat]]'] === undefined) {
          // a. Let F be a Function object, with internal properties set as
          //    specified for built-in functions in ES5, 15, or successor, and the
          //    length property set to 1, that takes the argument value and
          //    performs the following steps:
          var F = function F(value) {
              // i. If value is not provided, then let value be undefined.
              // ii. Let x be ToNumber(value).
              // iii. Return the result of calling the FormatNumber abstract
              //      operation (defined below) with arguments this and x.
              return FormatNumber(this, /* x = */Number(value));
          };

          // b. Let bind be the standard built-in function object defined in ES5,
          //    15.3.4.5.
          // c. Let bf be the result of calling the [[Call]] internal method of
          //    bind with F as the this value and an argument list containing
          //    the single item this.
          var bf = fnBind.call(F, this);

          // d. Set the [[boundFormat]] internal property of this NumberFormat
          //    object to bf.
          internal['[[boundFormat]]'] = bf;
      }
      // Return the value of the [[boundFormat]] internal property of this
      // NumberFormat object.
      return internal['[[boundFormat]]'];
  }

  function formatToParts() {
      var value = arguments.length <= 0 || arguments[0] === undefined ? undefined : arguments[0];

      var internal = this !== null && babelHelpers$1["typeof"](this) === 'object' && getInternalProperties(this);
      if (!internal || !internal['[[initializedNumberFormat]]']) throw new TypeError('`this` value for formatToParts() is not an initialized Intl.NumberFormat object.');

      var x = Number(value);
      return FormatNumberToParts(this, x);
  }

  Object.defineProperty(Intl$1.NumberFormat.prototype, 'formatToParts', {
      configurable: true,
      enumerable: false,
      writable: true,
      value: formatToParts
  });

  /*
   * @spec[stasm/ecma402/number-format-to-parts/spec/numberformat.html]
   * @clause[sec-formatnumbertoparts]
   */
  function FormatNumberToParts(numberFormat, x) {
      // 1. Let parts be ? PartitionNumberPattern(numberFormat, x).
      var parts = PartitionNumberPattern(numberFormat, x);
      // 2. Let result be ArrayCreate(0).
      var result = [];
      // 3. Let n be 0.
      var n = 0;
      // 4. For each part in parts, do:
      for (var i = 0; parts.length > i; i++) {
          var part = parts[i];
          // a. Let O be ObjectCreate(%ObjectPrototype%).
          var O = {};
          // a. Perform ? CreateDataPropertyOrThrow(O, "type", part.[[type]]).
          O.type = part['[[type]]'];
          // a. Perform ? CreateDataPropertyOrThrow(O, "value", part.[[value]]).
          O.value = part['[[value]]'];
          // a. Perform ? CreateDataPropertyOrThrow(result, ? ToString(n), O).
          result[n] = O;
          // a. Increment n by 1.
          n += 1;
      }
      // 5. Return result.
      return result;
  }

  /*
   * @spec[stasm/ecma402/number-format-to-parts/spec/numberformat.html]
   * @clause[sec-partitionnumberpattern]
   */
  function PartitionNumberPattern(numberFormat, x) {

      var internal = getInternalProperties(numberFormat),
          locale = internal['[[dataLocale]]'],
          nums = internal['[[numberingSystem]]'],
          data = internals.NumberFormat['[[localeData]]'][locale],
          ild = data.symbols[nums] || data.symbols.latn,
          pattern = void 0;

      // 1. If x is not NaN and x < 0, then:
      if (!isNaN(x) && x < 0) {
          // a. Let x be -x.
          x = -x;
          // a. Let pattern be the value of numberFormat.[[negativePattern]].
          pattern = internal['[[negativePattern]]'];
      }
      // 2. Else,
      else {
              // a. Let pattern be the value of numberFormat.[[positivePattern]].
              pattern = internal['[[positivePattern]]'];
          }
      // 3. Let result be a new empty List.
      var result = new List();
      // 4. Let beginIndex be Call(%StringProto_indexOf%, pattern, "{", 0).
      var beginIndex = pattern.indexOf('{', 0);
      // 5. Let endIndex be 0.
      var endIndex = 0;
      // 6. Let nextIndex be 0.
      var nextIndex = 0;
      // 7. Let length be the number of code units in pattern.
      var length = pattern.length;
      // 8. Repeat while beginIndex is an integer index into pattern:
      while (beginIndex > -1 && beginIndex < length) {
          // a. Set endIndex to Call(%StringProto_indexOf%, pattern, "}", beginIndex)
          endIndex = pattern.indexOf('}', beginIndex);
          // a. If endIndex = -1, throw new Error exception.
          if (endIndex === -1) throw new Error();
          // a. If beginIndex is greater than nextIndex, then:
          if (beginIndex > nextIndex) {
              // i. Let literal be a substring of pattern from position nextIndex, inclusive, to position beginIndex, exclusive.
              var literal = pattern.substring(nextIndex, beginIndex);
              // ii. Add new part record { [[type]]: "literal", [[value]]: literal } as a new element of the list result.
              arrPush.call(result, { '[[type]]': 'literal', '[[value]]': literal });
          }
          // a. Let p be the substring of pattern from position beginIndex, exclusive, to position endIndex, exclusive.
          var p = pattern.substring(beginIndex + 1, endIndex);
          // a. If p is equal "number", then:
          if (p === "number") {
              // i. If x is NaN,
              if (isNaN(x)) {
                  // 1. Let n be an ILD String value indicating the NaN value.
                  var n = ild.nan;
                  // 2. Add new part record { [[type]]: "nan", [[value]]: n } as a new element of the list result.
                  arrPush.call(result, { '[[type]]': 'nan', '[[value]]': n });
              }
              // ii. Else if isFinite(x) is false,
              else if (!isFinite(x)) {
                      // 1. Let n be an ILD String value indicating infinity.
                      var _n = ild.infinity;
                      // 2. Add new part record { [[type]]: "infinity", [[value]]: n } as a new element of the list result.
                      arrPush.call(result, { '[[type]]': 'infinity', '[[value]]': _n });
                  }
                  // iii. Else,
                  else {
                          // 1. If the value of numberFormat.[[style]] is "percent" and isFinite(x), let x be 100 × x.
                          if (internal['[[style]]'] === 'percent' && isFinite(x)) x *= 100;

                          var _n2 = void 0;
                          // 2. If the numberFormat.[[minimumSignificantDigits]] and numberFormat.[[maximumSignificantDigits]] are present, then
                          if (hop.call(internal, '[[minimumSignificantDigits]]') && hop.call(internal, '[[maximumSignificantDigits]]')) {
                              // a. Let n be ToRawPrecision(x, numberFormat.[[minimumSignificantDigits]], numberFormat.[[maximumSignificantDigits]]).
                              _n2 = ToRawPrecision(x, internal['[[minimumSignificantDigits]]'], internal['[[maximumSignificantDigits]]']);
                          }
                          // 3. Else,
                          else {
                                  // a. Let n be ToRawFixed(x, numberFormat.[[minimumIntegerDigits]], numberFormat.[[minimumFractionDigits]], numberFormat.[[maximumFractionDigits]]).
                                  _n2 = ToRawFixed(x, internal['[[minimumIntegerDigits]]'], internal['[[minimumFractionDigits]]'], internal['[[maximumFractionDigits]]']);
                              }
                          // 4. If the value of the numberFormat.[[numberingSystem]] matches one of the values in the "Numbering System" column of Table 2 below, then
                          if (numSys[nums]) {
                              (function () {
                                  // a. Let digits be an array whose 10 String valued elements are the UTF-16 string representations of the 10 digits specified in the "Digits" column of the matching row in Table 2.
                                  var digits = numSys[nums];
                                  // a. Replace each digit in n with the value of digits[digit].
                                  _n2 = String(_n2).replace(/\d/g, function (digit) {
                                      return digits[digit];
                                  });
                              })();
                          }
                          // 5. Else use an implementation dependent algorithm to map n to the appropriate representation of n in the given numbering system.
                          else _n2 = String(_n2); // ###TODO###

                          var integer = void 0;
                          var fraction = void 0;
                          // 6. Let decimalSepIndex be Call(%StringProto_indexOf%, n, ".", 0).
                          var decimalSepIndex = _n2.indexOf('.', 0);
                          // 7. If decimalSepIndex > 0, then:
                          if (decimalSepIndex > 0) {
                              // a. Let integer be the substring of n from position 0, inclusive, to position decimalSepIndex, exclusive.
                              integer = _n2.substring(0, decimalSepIndex);
                              // a. Let fraction be the substring of n from position decimalSepIndex, exclusive, to the end of n.
                              fraction = _n2.substring(decimalSepIndex + 1, decimalSepIndex.length);
                          }
                          // 8. Else:
                          else {
                                  // a. Let integer be n.
                                  integer = _n2;
                                  // a. Let fraction be undefined.
                                  fraction = undefined;
                              }
                          // 9. If the value of the numberFormat.[[useGrouping]] is true,
                          if (internal['[[useGrouping]]'] === true) {
                              // a. Let groupSepSymbol be the ILND String representing the grouping separator.
                              var groupSepSymbol = ild.group;
                              // a. Let groups be a List whose elements are, in left to right order, the substrings defined by ILND set of locations within the integer.
                              var groups = [];
                              // ----> implementation:
                              // Primary group represents the group closest to the decimal
                              var pgSize = data.patterns.primaryGroupSize || 3;
                              // Secondary group is every other group
                              var sgSize = data.patterns.secondaryGroupSize || pgSize;
                              // Group only if necessary
                              if (integer.length > pgSize) {
                                  // Index of the primary grouping separator
                                  var end = integer.length - pgSize;
                                  // Starting index for our loop
                                  var idx = end % sgSize;
                                  var start = integer.slice(0, idx);
                                  if (start.length) arrPush.call(groups, start);
                                  // Loop to separate into secondary grouping digits
                                  while (idx < end) {
                                      arrPush.call(groups, integer.slice(idx, idx + sgSize));
                                      idx += sgSize;
                                  }
                                  // Add the primary grouping digits
                                  arrPush.call(groups, integer.slice(end));
                              } else {
                                  arrPush.call(groups, integer);
                              }
                              // a. Assert: The number of elements in groups List is greater than 0.
                              if (groups.length === 0) throw new Error();
                              // a. Repeat, while groups List is not empty:
                              while (groups.length) {
                                  // i. Remove the first element from groups and let integerGroup be the value of that element.
                                  var integerGroup = arrShift.call(groups);
                                  // ii. Add new part record { [[type]]: "integer", [[value]]: integerGroup } as a new element of the list result.
                                  arrPush.call(result, { '[[type]]': 'integer', '[[value]]': integerGroup });
                                  // iii. If groups List is not empty, then:
                                  if (groups.length) {
                                      // 1. Add new part record { [[type]]: "group", [[value]]: groupSepSymbol } as a new element of the list result.
                                      arrPush.call(result, { '[[type]]': 'group', '[[value]]': groupSepSymbol });
                                  }
                              }
                          }
                          // 10. Else,
                          else {
                                  // a. Add new part record { [[type]]: "integer", [[value]]: integer } as a new element of the list result.
                                  arrPush.call(result, { '[[type]]': 'integer', '[[value]]': integer });
                              }
                          // 11. If fraction is not undefined, then:
                          if (fraction !== undefined) {
                              // a. Let decimalSepSymbol be the ILND String representing the decimal separator.
                              var decimalSepSymbol = ild.decimal;
                              // a. Add new part record { [[type]]: "decimal", [[value]]: decimalSepSymbol } as a new element of the list result.
                              arrPush.call(result, { '[[type]]': 'decimal', '[[value]]': decimalSepSymbol });
                              // a. Add new part record { [[type]]: "fraction", [[value]]: fraction } as a new element of the list result.
                              arrPush.call(result, { '[[type]]': 'fraction', '[[value]]': fraction });
                          }
                      }
          }
          // a. Else if p is equal "plusSign", then:
          else if (p === "plusSign") {
                  // i. Let plusSignSymbol be the ILND String representing the plus sign.
                  var plusSignSymbol = ild.plusSign;
                  // ii. Add new part record { [[type]]: "plusSign", [[value]]: plusSignSymbol } as a new element of the list result.
                  arrPush.call(result, { '[[type]]': 'plusSign', '[[value]]': plusSignSymbol });
              }
              // a. Else if p is equal "minusSign", then:
              else if (p === "minusSign") {
                      // i. Let minusSignSymbol be the ILND String representing the minus sign.
                      var minusSignSymbol = ild.minusSign;
                      // ii. Add new part record { [[type]]: "minusSign", [[value]]: minusSignSymbol } as a new element of the list result.
                      arrPush.call(result, { '[[type]]': 'minusSign', '[[value]]': minusSignSymbol });
                  }
                  // a. Else if p is equal "percentSign" and numberFormat.[[style]] is "percent", then:
                  else if (p === "percentSign" && internal['[[style]]'] === "percent") {
                          // i. Let percentSignSymbol be the ILND String representing the percent sign.
                          var percentSignSymbol = ild.percentSign;
                          // ii. Add new part record { [[type]]: "percentSign", [[value]]: percentSignSymbol } as a new element of the list result.
                          arrPush.call(result, { '[[type]]': 'literal', '[[value]]': percentSignSymbol });
                      }
                      // a. Else if p is equal "currency" and numberFormat.[[style]] is "currency", then:
                      else if (p === "currency" && internal['[[style]]'] === "currency") {
                              // i. Let currency be the value of numberFormat.[[currency]].
                              var currency = internal['[[currency]]'];

                              var cd = void 0;

                              // ii. If numberFormat.[[currencyDisplay]] is "code", then
                              if (internal['[[currencyDisplay]]'] === "code") {
                                  // 1. Let cd be currency.
                                  cd = currency;
                              }
                              // iii. Else if numberFormat.[[currencyDisplay]] is "symbol", then
                              else if (internal['[[currencyDisplay]]'] === "symbol") {
                                      // 1. Let cd be an ILD string representing currency in short form. If the implementation does not have such a representation of currency, use currency itself.
                                      cd = data.currencies[currency] || currency;
                                  }
                                  // iv. Else if numberFormat.[[currencyDisplay]] is "name", then
                                  else if (internal['[[currencyDisplay]]'] === "name") {
                                          // 1. Let cd be an ILD string representing currency in long form. If the implementation does not have such a representation of currency, then use currency itself.
                                          cd = currency;
                                      }
                              // v. Add new part record { [[type]]: "currency", [[value]]: cd } as a new element of the list result.
                              arrPush.call(result, { '[[type]]': 'currency', '[[value]]': cd });
                          }
                          // a. Else,
                          else {
                                  // i. Let literal be the substring of pattern from position beginIndex, inclusive, to position endIndex, inclusive.
                                  var _literal = pattern.substring(beginIndex, endIndex);
                                  // ii. Add new part record { [[type]]: "literal", [[value]]: literal } as a new element of the list result.
                                  arrPush.call(result, { '[[type]]': 'literal', '[[value]]': _literal });
                              }
          // a. Set nextIndex to endIndex + 1.
          nextIndex = endIndex + 1;
          // a. Set beginIndex to Call(%StringProto_indexOf%, pattern, "{", nextIndex)
          beginIndex = pattern.indexOf('{', nextIndex);
      }
      // 9. If nextIndex is less than length, then:
      if (nextIndex < length) {
          // a. Let literal be the substring of pattern from position nextIndex, inclusive, to position length, exclusive.
          var _literal2 = pattern.substring(nextIndex, length);
          // a. Add new part record { [[type]]: "literal", [[value]]: literal } as a new element of the list result.
          arrPush.call(result, { '[[type]]': 'literal', '[[value]]': _literal2 });
      }
      // 10. Return result.
      return result;
  }

  /*
   * @spec[stasm/ecma402/number-format-to-parts/spec/numberformat.html]
   * @clause[sec-formatnumber]
   */
  function FormatNumber(numberFormat, x) {
      // 1. Let parts be ? PartitionNumberPattern(numberFormat, x).
      var parts = PartitionNumberPattern(numberFormat, x);
      // 2. Let result be an empty String.
      var result = '';
      // 3. For each part in parts, do:
      for (var i = 0; parts.length > i; i++) {
          var part = parts[i];
          // a. Set result to a String value produced by concatenating result and part.[[value]].
          result += part['[[value]]'];
      }
      // 4. Return result.
      return result;
  }

  /**
   * When the ToRawPrecision abstract operation is called with arguments x (which
   * must be a finite non-negative number), minPrecision, and maxPrecision (both
   * must be integers between 1 and 21) the following steps are taken:
   */
  function ToRawPrecision(x, minPrecision, maxPrecision) {
      // 1. Let p be maxPrecision.
      var p = maxPrecision;

      var m = void 0,
          e = void 0;

      // 2. If x = 0, then
      if (x === 0) {
          // a. Let m be the String consisting of p occurrences of the character "0".
          m = arrJoin.call(Array(p + 1), '0');
          // b. Let e be 0.
          e = 0;
      }
      // 3. Else
      else {
              // a. Let e and n be integers such that 10ᵖ⁻¹ ≤ n < 10ᵖ and for which the
              //    exact mathematical value of n × 10ᵉ⁻ᵖ⁺¹ – x is as close to zero as
              //    possible. If there are two such sets of e and n, pick the e and n for
              //    which n × 10ᵉ⁻ᵖ⁺¹ is larger.
              e = log10Floor(Math.abs(x));

              // Easier to get to m from here
              var f = Math.round(Math.exp(Math.abs(e - p + 1) * Math.LN10));

              // b. Let m be the String consisting of the digits of the decimal
              //    representation of n (in order, with no leading zeroes)
              m = String(Math.round(e - p + 1 < 0 ? x * f : x / f));
          }

      // 4. If e ≥ p, then
      if (e >= p)
          // a. Return the concatenation of m and e-p+1 occurrences of the character "0".
          return m + arrJoin.call(Array(e - p + 1 + 1), '0');

          // 5. If e = p-1, then
      else if (e === p - 1)
              // a. Return m.
              return m;

              // 6. If e ≥ 0, then
          else if (e >= 0)
                  // a. Let m be the concatenation of the first e+1 characters of m, the character
                  //    ".", and the remaining p–(e+1) characters of m.
                  m = m.slice(0, e + 1) + '.' + m.slice(e + 1);

                  // 7. If e < 0, then
              else if (e < 0)
                      // a. Let m be the concatenation of the String "0.", –(e+1) occurrences of the
                      //    character "0", and the string m.
                      m = '0.' + arrJoin.call(Array(-(e + 1) + 1), '0') + m;

      // 8. If m contains the character ".", and maxPrecision > minPrecision, then
      if (m.indexOf(".") >= 0 && maxPrecision > minPrecision) {
          // a. Let cut be maxPrecision – minPrecision.
          var cut = maxPrecision - minPrecision;

          // b. Repeat while cut > 0 and the last character of m is "0":
          while (cut > 0 && m.charAt(m.length - 1) === '0') {
              //  i. Remove the last character from m.
              m = m.slice(0, -1);

              //  ii. Decrease cut by 1.
              cut--;
          }

          // c. If the last character of m is ".", then
          if (m.charAt(m.length - 1) === '.')
              //    i. Remove the last character from m.
              m = m.slice(0, -1);
      }
      // 9. Return m.
      return m;
  }

  /**
   * @spec[tc39/ecma402/master/spec/numberformat.html]
   * @clause[sec-torawfixed]
   * When the ToRawFixed abstract operation is called with arguments x (which must
   * be a finite non-negative number), minInteger (which must be an integer between
   * 1 and 21), minFraction, and maxFraction (which must be integers between 0 and
   * 20) the following steps are taken:
   */
  function ToRawFixed(x, minInteger, minFraction, maxFraction) {
      // 1. Let f be maxFraction.
      var f = maxFraction;
      // 2. Let n be an integer for which the exact mathematical value of n ÷ 10f – x is as close to zero as possible. If there are two such n, pick the larger n.
      var n = Math.pow(10, f) * x; // diverging...
      // 3. If n = 0, let m be the String "0". Otherwise, let m be the String consisting of the digits of the decimal representation of n (in order, with no leading zeroes).
      var m = n === 0 ? "0" : n.toFixed(0); // divering...

      {
          // this diversion is needed to take into consideration big numbers, e.g.:
          // 1.2344501e+37 -> 12344501000000000000000000000000000000
          var idx = void 0;
          var exp = (idx = m.indexOf('e')) > -1 ? m.slice(idx + 1) : 0;
          if (exp) {
              m = m.slice(0, idx).replace('.', '');
              m += arrJoin.call(Array(exp - (m.length - 1) + 1), '0');
          }
      }

      var int = void 0;
      // 4. If f ≠ 0, then
      if (f !== 0) {
          // a. Let k be the number of characters in m.
          var k = m.length;
          // a. If k ≤ f, then
          if (k <= f) {
              // i. Let z be the String consisting of f+1–k occurrences of the character "0".
              var z = arrJoin.call(Array(f + 1 - k + 1), '0');
              // ii. Let m be the concatenation of Strings z and m.
              m = z + m;
              // iii. Let k be f+1.
              k = f + 1;
          }
          // a. Let a be the first k–f characters of m, and let b be the remaining f characters of m.
          var a = m.substring(0, k - f),
              b = m.substring(k - f, m.length);
          // a. Let m be the concatenation of the three Strings a, ".", and b.
          m = a + "." + b;
          // a. Let int be the number of characters in a.
          int = a.length;
      }
      // 5. Else, let int be the number of characters in m.
      else int = m.length;
      // 6. Let cut be maxFraction – minFraction.
      var cut = maxFraction - minFraction;
      // 7. Repeat while cut > 0 and the last character of m is "0":
      while (cut > 0 && m.slice(-1) === "0") {
          // a. Remove the last character from m.
          m = m.slice(0, -1);
          // a. Decrease cut by 1.
          cut--;
      }
      // 8. If the last character of m is ".", then
      if (m.slice(-1) === ".") {
          // a. Remove the last character from m.
          m = m.slice(0, -1);
      }
      // 9. If int < minInteger, then
      if (int < minInteger) {
          // a. Let z be the String consisting of minInteger–int occurrences of the character "0".
          var _z = arrJoin.call(Array(minInteger - int + 1), '0');
          // a. Let m be the concatenation of Strings z and m.
          m = _z + m;
      }
      // 10. Return m.
      return m;
  }

  // Sect 11.3.2 Table 2, Numbering systems
  // ======================================
  var numSys = {
      arab: ["٠", "١", "٢", "٣", "٤", "٥", "٦", "٧", "٨", "٩"],
      arabext: ["۰", "۱", "۲", "۳", "۴", "۵", "۶", "۷", "۸", "۹"],
      bali: ["᭐", "᭑", "᭒", "᭓", "᭔", "᭕", "᭖", "᭗", "᭘", "᭙"],
      beng: ["০", "১", "২", "৩", "৪", "৫", "৬", "৭", "৮", "৯"],
      deva: ["०", "१", "२", "३", "४", "५", "६", "७", "८", "९"],
      fullwide: ["０", "１", "２", "３", "４", "５", "６", "７", "８", "９"],
      gujr: ["૦", "૧", "૨", "૩", "૪", "૫", "૬", "૭", "૮", "૯"],
      guru: ["੦", "੧", "੨", "੩", "੪", "੫", "੬", "੭", "੮", "੯"],
      hanidec: ["〇", "一", "二", "三", "四", "五", "六", "七", "八", "九"],
      khmr: ["០", "១", "២", "៣", "៤", "៥", "៦", "៧", "៨", "៩"],
      knda: ["೦", "೧", "೨", "೩", "೪", "೫", "೬", "೭", "೮", "೯"],
      laoo: ["໐", "໑", "໒", "໓", "໔", "໕", "໖", "໗", "໘", "໙"],
      latn: ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"],
      limb: ["᥆", "᥇", "᥈", "᥉", "᥊", "᥋", "᥌", "᥍", "᥎", "᥏"],
      mlym: ["൦", "൧", "൨", "൩", "൪", "൫", "൬", "൭", "൮", "൯"],
      mong: ["᠐", "᠑", "᠒", "᠓", "᠔", "᠕", "᠖", "᠗", "᠘", "᠙"],
      mymr: ["၀", "၁", "၂", "၃", "၄", "၅", "၆", "၇", "၈", "၉"],
      orya: ["୦", "୧", "୨", "୩", "୪", "୫", "୬", "୭", "୮", "୯"],
      tamldec: ["௦", "௧", "௨", "௩", "௪", "௫", "௬", "௭", "௮", "௯"],
      telu: ["౦", "౧", "౨", "౩", "౪", "౫", "౬", "౭", "౮", "౯"],
      thai: ["๐", "๑", "๒", "๓", "๔", "๕", "๖", "๗", "๘", "๙"],
      tibt: ["༠", "༡", "༢", "༣", "༤", "༥", "༦", "༧", "༨", "༩"]
  };

  /**
   * This function provides access to the locale and formatting options computed
   * during initialization of the object.
   *
   * The function returns a new object whose properties and attributes are set as
   * if constructed by an object literal assigning to each of the following
   * properties the value of the corresponding internal property of this
   * NumberFormat object (see 11.4): locale, numberingSystem, style, currency,
   * currencyDisplay, minimumIntegerDigits, minimumFractionDigits,
   * maximumFractionDigits, minimumSignificantDigits, maximumSignificantDigits, and
   * useGrouping. Properties whose corresponding internal properties are not present
   * are not assigned.
   */
  /* 11.3.3 */defineProperty(Intl$1.NumberFormat.prototype, 'resolvedOptions', {
      configurable: true,
      writable: true,
      value: function value() {
          var prop = void 0,
              descs = new Record(),
              props = ['locale', 'numberingSystem', 'style', 'currency', 'currencyDisplay', 'minimumIntegerDigits', 'minimumFractionDigits', 'maximumFractionDigits', 'minimumSignificantDigits', 'maximumSignificantDigits', 'useGrouping'],
              internal = this !== null && babelHelpers$1["typeof"](this) === 'object' && getInternalProperties(this);

          // Satisfy test 11.3_b
          if (!internal || !internal['[[initializedNumberFormat]]']) throw new TypeError('`this` value for resolvedOptions() is not an initialized Intl.NumberFormat object.');

          for (var i = 0, max = props.length; i < max; i++) {
              if (hop.call(internal, prop = '[[' + props[i] + ']]')) descs[props[i]] = { value: internal[prop], writable: true, configurable: true, enumerable: true };
          }

          return objCreate({}, descs);
      }
  });

  /* jslint esnext: true */

  // Match these datetime components in a CLDR pattern, except those in single quotes
  var expDTComponents = /(?:[Eec]{1,6}|G{1,5}|[Qq]{1,5}|(?:[yYur]+|U{1,5})|[ML]{1,5}|d{1,2}|D{1,3}|F{1}|[abB]{1,5}|[hkHK]{1,2}|w{1,2}|W{1}|m{1,2}|s{1,2}|[zZOvVxX]{1,4})(?=([^']*'[^']*')*[^']*$)/g;
  // trim patterns after transformations
  var expPatternTrimmer = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g;
  // Skip over patterns with these datetime components because we don't have data
  // to back them up:
  // timezone, weekday, amoung others
  var unwantedDTCs = /[rqQASjJgwWIQq]/; // xXVO were removed from this list in favor of computing matches with timeZoneName values but printing as empty string

  var dtKeys = ["era", "year", "month", "day", "weekday", "quarter"];
  var tmKeys = ["hour", "minute", "second", "hour12", "timeZoneName"];

  function isDateFormatOnly(obj) {
      for (var i = 0; i < tmKeys.length; i += 1) {
          if (obj.hasOwnProperty(tmKeys[i])) {
              return false;
          }
      }
      return true;
  }

  function isTimeFormatOnly(obj) {
      for (var i = 0; i < dtKeys.length; i += 1) {
          if (obj.hasOwnProperty(dtKeys[i])) {
              return false;
          }
      }
      return true;
  }

  function joinDateAndTimeFormats(dateFormatObj, timeFormatObj) {
      var o = { _: {} };
      for (var i = 0; i < dtKeys.length; i += 1) {
          if (dateFormatObj[dtKeys[i]]) {
              o[dtKeys[i]] = dateFormatObj[dtKeys[i]];
          }
          if (dateFormatObj._[dtKeys[i]]) {
              o._[dtKeys[i]] = dateFormatObj._[dtKeys[i]];
          }
      }
      for (var j = 0; j < tmKeys.length; j += 1) {
          if (timeFormatObj[tmKeys[j]]) {
              o[tmKeys[j]] = timeFormatObj[tmKeys[j]];
          }
          if (timeFormatObj._[tmKeys[j]]) {
              o._[tmKeys[j]] = timeFormatObj._[tmKeys[j]];
          }
      }
      return o;
  }

  function computeFinalPatterns(formatObj) {
      // From http://www.unicode.org/reports/tr35/tr35-dates.html#Date_Format_Patterns:
      //  'In patterns, two single quotes represents a literal single quote, either
      //   inside or outside single quotes. Text within single quotes is not
      //   interpreted in any way (except for two adjacent single quotes).'
      formatObj.pattern12 = formatObj.extendedPattern.replace(/'([^']*)'/g, function ($0, literal) {
          return literal ? literal : "'";
      });

      // pattern 12 is always the default. we can produce the 24 by removing {ampm}
      formatObj.pattern = formatObj.pattern12.replace('{ampm}', '').replace(expPatternTrimmer, '');
      return formatObj;
  }

  function expDTComponentsMeta($0, formatObj) {
      switch ($0.charAt(0)) {
          // --- Era
          case 'G':
              formatObj.era = ['short', 'short', 'short', 'long', 'narrow'][$0.length - 1];
              return '{era}';

          // --- Year
          case 'y':
          case 'Y':
          case 'u':
          case 'U':
          case 'r':
              formatObj.year = $0.length === 2 ? '2-digit' : 'numeric';
              return '{year}';

          // --- Quarter (not supported in this polyfill)
          case 'Q':
          case 'q':
              formatObj.quarter = ['numeric', '2-digit', 'short', 'long', 'narrow'][$0.length - 1];
              return '{quarter}';

          // --- Month
          case 'M':
          case 'L':
              formatObj.month = ['numeric', '2-digit', 'short', 'long', 'narrow'][$0.length - 1];
              return '{month}';

          // --- Week (not supported in this polyfill)
          case 'w':
              // week of the year
              formatObj.week = $0.length === 2 ? '2-digit' : 'numeric';
              return '{weekday}';
          case 'W':
              // week of the month
              formatObj.week = 'numeric';
              return '{weekday}';

          // --- Day
          case 'd':
              // day of the month
              formatObj.day = $0.length === 2 ? '2-digit' : 'numeric';
              return '{day}';
          case 'D': // day of the year
          case 'F': // day of the week
          case 'g':
              // 1..n: Modified Julian day
              formatObj.day = 'numeric';
              return '{day}';

          // --- Week Day
          case 'E':
              // day of the week
              formatObj.weekday = ['short', 'short', 'short', 'long', 'narrow', 'short'][$0.length - 1];
              return '{weekday}';
          case 'e':
              // local day of the week
              formatObj.weekday = ['numeric', '2-digit', 'short', 'long', 'narrow', 'short'][$0.length - 1];
              return '{weekday}';
          case 'c':
              // stand alone local day of the week
              formatObj.weekday = ['numeric', undefined, 'short', 'long', 'narrow', 'short'][$0.length - 1];
              return '{weekday}';

          // --- Period
          case 'a': // AM, PM
          case 'b': // am, pm, noon, midnight
          case 'B':
              // flexible day periods
              formatObj.hour12 = true;
              return '{ampm}';

          // --- Hour
          case 'h':
          case 'H':
              formatObj.hour = $0.length === 2 ? '2-digit' : 'numeric';
              return '{hour}';
          case 'k':
          case 'K':
              formatObj.hour12 = true; // 12-hour-cycle time formats (using h or K)
              formatObj.hour = $0.length === 2 ? '2-digit' : 'numeric';
              return '{hour}';

          // --- Minute
          case 'm':
              formatObj.minute = $0.length === 2 ? '2-digit' : 'numeric';
              return '{minute}';

          // --- Second
          case 's':
              formatObj.second = $0.length === 2 ? '2-digit' : 'numeric';
              return '{second}';
          case 'S':
          case 'A':
              formatObj.second = 'numeric';
              return '{second}';

          // --- Timezone
          case 'z': // 1..3, 4: specific non-location format
          case 'Z': // 1..3, 4, 5: The ISO8601 varios formats
          case 'O': // 1, 4: miliseconds in day short, long
          case 'v': // 1, 4: generic non-location format
          case 'V': // 1, 2, 3, 4: time zone ID or city
          case 'X': // 1, 2, 3, 4: The ISO8601 varios formats
          case 'x':
              // 1, 2, 3, 4: The ISO8601 varios formats
              // this polyfill only supports much, for now, we are just doing something dummy
              formatObj.timeZoneName = $0.length < 4 ? 'short' : 'long';
              return '{timeZoneName}';
      }
  }

  /**
   * Converts the CLDR availableFormats into the objects and patterns required by
   * the ECMAScript Internationalization API specification.
   */
  function createDateTimeFormat(skeleton, pattern) {
      // we ignore certain patterns that are unsupported to avoid this expensive op.
      if (unwantedDTCs.test(pattern)) return undefined;

      var formatObj = {
          originalPattern: pattern,
          _: {}
      };

      // Replace the pattern string with the one required by the specification, whilst
      // at the same time evaluating it for the subsets and formats
      formatObj.extendedPattern = pattern.replace(expDTComponents, function ($0) {
          // See which symbol we're dealing with
          return expDTComponentsMeta($0, formatObj._);
      });

      // Match the skeleton string with the one required by the specification
      // this implementation is based on the Date Field Symbol Table:
      // http://unicode.org/reports/tr35/tr35-dates.html#Date_Field_Symbol_Table
      // Note: we are adding extra data to the formatObject even though this polyfill
      //       might not support it.
      skeleton.replace(expDTComponents, function ($0) {
          // See which symbol we're dealing with
          return expDTComponentsMeta($0, formatObj);
      });

      return computeFinalPatterns(formatObj);
  }

  /**
   * Processes DateTime formats from CLDR to an easier-to-parse format.
   * the result of this operation should be cached the first time a particular
   * calendar is analyzed.
   *
   * The specification requires we support at least the following subsets of
   * date/time components:
   *
   *   - 'weekday', 'year', 'month', 'day', 'hour', 'minute', 'second'
   *   - 'weekday', 'year', 'month', 'day'
   *   - 'year', 'month', 'day'
   *   - 'year', 'month'
   *   - 'month', 'day'
   *   - 'hour', 'minute', 'second'
   *   - 'hour', 'minute'
   *
   * We need to cherry pick at least these subsets from the CLDR data and convert
   * them into the pattern objects used in the ECMA-402 API.
   */
  function createDateTimeFormats(formats) {
      var availableFormats = formats.availableFormats;
      var timeFormats = formats.timeFormats;
      var dateFormats = formats.dateFormats;
      var result = [];
      var skeleton = void 0,
          pattern = void 0,
          computed = void 0,
          i = void 0,
          j = void 0;
      var timeRelatedFormats = [];
      var dateRelatedFormats = [];

      // Map available (custom) formats into a pattern for createDateTimeFormats
      for (skeleton in availableFormats) {
          if (availableFormats.hasOwnProperty(skeleton)) {
              pattern = availableFormats[skeleton];
              computed = createDateTimeFormat(skeleton, pattern);
              if (computed) {
                  result.push(computed);
                  // in some cases, the format is only displaying date specific props
                  // or time specific props, in which case we need to also produce the
                  // combined formats.
                  if (isDateFormatOnly(computed)) {
                      dateRelatedFormats.push(computed);
                  } else if (isTimeFormatOnly(computed)) {
                      timeRelatedFormats.push(computed);
                  }
              }
          }
      }

      // Map time formats into a pattern for createDateTimeFormats
      for (skeleton in timeFormats) {
          if (timeFormats.hasOwnProperty(skeleton)) {
              pattern = timeFormats[skeleton];
              computed = createDateTimeFormat(skeleton, pattern);
              if (computed) {
                  result.push(computed);
                  timeRelatedFormats.push(computed);
              }
          }
      }

      // Map date formats into a pattern for createDateTimeFormats
      for (skeleton in dateFormats) {
          if (dateFormats.hasOwnProperty(skeleton)) {
              pattern = dateFormats[skeleton];
              computed = createDateTimeFormat(skeleton, pattern);
              if (computed) {
                  result.push(computed);
                  dateRelatedFormats.push(computed);
              }
          }
      }

      // combine custom time and custom date formats when they are orthogonals to complete the
      // formats supported by CLDR.
      // This Algo is based on section "Missing Skeleton Fields" from:
      // http://unicode.org/reports/tr35/tr35-dates.html#availableFormats_appendItems
      for (i = 0; i < timeRelatedFormats.length; i += 1) {
          for (j = 0; j < dateRelatedFormats.length; j += 1) {
              if (dateRelatedFormats[j].month === 'long') {
                  pattern = dateRelatedFormats[j].weekday ? formats.full : formats.long;
              } else if (dateRelatedFormats[j].month === 'short') {
                  pattern = formats.medium;
              } else {
                  pattern = formats.short;
              }
              computed = joinDateAndTimeFormats(dateRelatedFormats[j], timeRelatedFormats[i]);
              computed.originalPattern = pattern;
              computed.extendedPattern = pattern.replace('{0}', timeRelatedFormats[i].extendedPattern).replace('{1}', dateRelatedFormats[j].extendedPattern).replace(/^[,\s]+|[,\s]+$/gi, '');
              result.push(computeFinalPatterns(computed));
          }
      }

      return result;
  }

  // this represents the exceptions of the rule that are not covered by CLDR availableFormats
  // for single property configurations, they play no role when using multiple properties, and
  // those that are not in this table, are not exceptions or are not covered by the data we
  // provide.
  var validSyntheticProps = {
      second: {
          numeric: 's',
          '2-digit': 'ss'
      },
      minute: {
          numeric: 'm',
          '2-digit': 'mm'
      },
      year: {
          numeric: 'y',
          '2-digit': 'yy'
      },
      day: {
          numeric: 'd',
          '2-digit': 'dd'
      },
      month: {
          numeric: 'L',
          '2-digit': 'LL',
          narrow: 'LLLLL',
          short: 'LLL',
          long: 'LLLL'
      },
      weekday: {
          narrow: 'ccccc',
          short: 'ccc',
          long: 'cccc'
      }
  };

  function generateSyntheticFormat(propName, propValue) {
      if (validSyntheticProps[propName] && validSyntheticProps[propName][propValue]) {
          var _ref2;

          return _ref2 = {
              originalPattern: validSyntheticProps[propName][propValue],
              _: defineProperty$1({}, propName, propValue),
              extendedPattern: "{" + propName + "}"
          }, defineProperty$1(_ref2, propName, propValue), defineProperty$1(_ref2, "pattern12", "{" + propName + "}"), defineProperty$1(_ref2, "pattern", "{" + propName + "}"), _ref2;
      }
  }

  // An object map of date component keys, saves using a regex later
  var dateWidths = objCreate(null, { narrow: {}, short: {}, long: {} });

  /**
   * Returns a string for a date component, resolved using multiple inheritance as specified
   * as specified in the Unicode Technical Standard 35.
   */
  function resolveDateString(data, ca, component, width, key) {
      // From http://www.unicode.org/reports/tr35/tr35.html#Multiple_Inheritance:
      // 'In clearly specified instances, resources may inherit from within the same locale.
      //  For example, ... the Buddhist calendar inherits from the Gregorian calendar.'
      var obj = data[ca] && data[ca][component] ? data[ca][component] : data.gregory[component],


      // "sideways" inheritance resolves strings when a key doesn't exist
      alts = {
          narrow: ['short', 'long'],
          short: ['long', 'narrow'],
          long: ['short', 'narrow']
      },


      //
      resolved = hop.call(obj, width) ? obj[width] : hop.call(obj, alts[width][0]) ? obj[alts[width][0]] : obj[alts[width][1]];

      // `key` wouldn't be specified for components 'dayPeriods'
      return key !== null ? resolved[key] : resolved;
  }

  // Define the DateTimeFormat constructor internally so it cannot be tainted
  function DateTimeFormatConstructor() {
      var locales = arguments[0];
      var options = arguments[1];

      if (!this || this === Intl$1) {
          return new Intl$1.DateTimeFormat(locales, options);
      }
      return InitializeDateTimeFormat(toObject(this), locales, options);
  }

  defineProperty(Intl$1, 'DateTimeFormat', {
      configurable: true,
      writable: true,
      value: DateTimeFormatConstructor
  });

  // Must explicitly set prototypes as unwritable
  defineProperty(DateTimeFormatConstructor, 'prototype', {
      writable: false
  });

  /**
   * The abstract operation InitializeDateTimeFormat accepts the arguments dateTimeFormat
   * (which must be an object), locales, and options. It initializes dateTimeFormat as a
   * DateTimeFormat object.
   */
  function /* 12.1.1.1 */InitializeDateTimeFormat(dateTimeFormat, locales, options) {
      // This will be a internal properties object if we're not already initialized
      var internal = getInternalProperties(dateTimeFormat);

      // Create an object whose props can be used to restore the values of RegExp props
      var regexpRestore = createRegExpRestore();

      // 1. If dateTimeFormat has an [[initializedIntlObject]] internal property with
      //    value true, throw a TypeError exception.
      if (internal['[[initializedIntlObject]]'] === true) throw new TypeError('`this` object has already been initialized as an Intl object');

      // Need this to access the `internal` object
      defineProperty(dateTimeFormat, '__getInternalProperties', {
          value: function value() {
              // NOTE: Non-standard, for internal use only
              if (arguments[0] === secret) return internal;
          }
      });

      // 2. Set the [[initializedIntlObject]] internal property of numberFormat to true.
      internal['[[initializedIntlObject]]'] = true;

      // 3. Let requestedLocales be the result of calling the CanonicalizeLocaleList
      //    abstract operation (defined in 9.2.1) with argument locales.
      var requestedLocales = CanonicalizeLocaleList(locales);

      // 4. Let options be the result of calling the ToDateTimeOptions abstract
      //    operation (defined below) with arguments options, "any", and "date".
      options = ToDateTimeOptions(options, 'any', 'date');

      // 5. Let opt be a new Record.
      var opt = new Record();

      // 6. Let matcher be the result of calling the GetOption abstract operation
      //    (defined in 9.2.9) with arguments options, "localeMatcher", "string", a List
      //    containing the two String values "lookup" and "best fit", and "best fit".
      var matcher = GetOption(options, 'localeMatcher', 'string', new List('lookup', 'best fit'), 'best fit');

      // 7. Set opt.[[localeMatcher]] to matcher.
      opt['[[localeMatcher]]'] = matcher;

      // 8. Let DateTimeFormat be the standard built-in object that is the initial
      //    value of Intl.DateTimeFormat.
      var DateTimeFormat = internals.DateTimeFormat; // This is what we *really* need

      // 9. Let localeData be the value of the [[localeData]] internal property of
      //    DateTimeFormat.
      var localeData = DateTimeFormat['[[localeData]]'];

      // 10. Let r be the result of calling the ResolveLocale abstract operation
      //     (defined in 9.2.5) with the [[availableLocales]] internal property of
      //      DateTimeFormat, requestedLocales, opt, the [[relevantExtensionKeys]]
      //      internal property of DateTimeFormat, and localeData.
      var r = ResolveLocale(DateTimeFormat['[[availableLocales]]'], requestedLocales, opt, DateTimeFormat['[[relevantExtensionKeys]]'], localeData);

      // 11. Set the [[locale]] internal property of dateTimeFormat to the value of
      //     r.[[locale]].
      internal['[[locale]]'] = r['[[locale]]'];

      // 12. Set the [[calendar]] internal property of dateTimeFormat to the value of
      //     r.[[ca]].
      internal['[[calendar]]'] = r['[[ca]]'];

      // 13. Set the [[numberingSystem]] internal property of dateTimeFormat to the value of
      //     r.[[nu]].
      internal['[[numberingSystem]]'] = r['[[nu]]'];

      // The specification doesn't tell us to do this, but it's helpful later on
      internal['[[dataLocale]]'] = r['[[dataLocale]]'];

      // 14. Let dataLocale be the value of r.[[dataLocale]].
      var dataLocale = r['[[dataLocale]]'];

      // 15. Let tz be the result of calling the [[Get]] internal method of options with
      //     argument "timeZone".
      var tz = options.timeZone;

      // 16. If tz is not undefined, then
      if (tz !== undefined) {
          // a. Let tz be ToString(tz).
          // b. Convert tz to upper case as described in 6.1.
          //    NOTE: If an implementation accepts additional time zone values, as permitted
          //          under certain conditions by the Conformance clause, different casing
          //          rules apply.
          tz = toLatinUpperCase(tz);

          // c. If tz is not "UTC", then throw a RangeError exception.
          // ###TODO: accept more time zones###
          if (tz !== 'UTC') throw new RangeError('timeZone is not supported.');
      }

      // 17. Set the [[timeZone]] internal property of dateTimeFormat to tz.
      internal['[[timeZone]]'] = tz;

      // 18. Let opt be a new Record.
      opt = new Record();

      // 19. For each row of Table 3, except the header row, do:
      for (var prop in dateTimeComponents) {
          if (!hop.call(dateTimeComponents, prop)) continue;

          // 20. Let prop be the name given in the Property column of the row.
          // 21. Let value be the result of calling the GetOption abstract operation,
          //     passing as argument options, the name given in the Property column of the
          //     row, "string", a List containing the strings given in the Values column of
          //     the row, and undefined.
          var value = GetOption(options, prop, 'string', dateTimeComponents[prop]);

          // 22. Set opt.[[<prop>]] to value.
          opt['[[' + prop + ']]'] = value;
      }

      // Assigned a value below
      var bestFormat = void 0;

      // 23. Let dataLocaleData be the result of calling the [[Get]] internal method of
      //     localeData with argument dataLocale.
      var dataLocaleData = localeData[dataLocale];

      // 24. Let formats be the result of calling the [[Get]] internal method of
      //     dataLocaleData with argument "formats".
      //     Note: we process the CLDR formats into the spec'd structure
      var formats = ToDateTimeFormats(dataLocaleData.formats);

      // 25. Let matcher be the result of calling the GetOption abstract operation with
      //     arguments options, "formatMatcher", "string", a List containing the two String
      //     values "basic" and "best fit", and "best fit".
      matcher = GetOption(options, 'formatMatcher', 'string', new List('basic', 'best fit'), 'best fit');

      // Optimization: caching the processed formats as a one time operation by
      // replacing the initial structure from localeData
      dataLocaleData.formats = formats;

      // 26. If matcher is "basic", then
      if (matcher === 'basic') {
          // 27. Let bestFormat be the result of calling the BasicFormatMatcher abstract
          //     operation (defined below) with opt and formats.
          bestFormat = BasicFormatMatcher(opt, formats);

          // 28. Else
      } else {
          {
              // diverging
              var _hr = GetOption(options, 'hour12', 'boolean' /*, undefined, undefined*/);
              opt.hour12 = _hr === undefined ? dataLocaleData.hour12 : _hr;
          }
          // 29. Let bestFormat be the result of calling the BestFitFormatMatcher
          //     abstract operation (defined below) with opt and formats.
          bestFormat = BestFitFormatMatcher(opt, formats);
      }

      // 30. For each row in Table 3, except the header row, do
      for (var _prop in dateTimeComponents) {
          if (!hop.call(dateTimeComponents, _prop)) continue;

          // a. Let prop be the name given in the Property column of the row.
          // b. Let pDesc be the result of calling the [[GetOwnProperty]] internal method of
          //    bestFormat with argument prop.
          // c. If pDesc is not undefined, then
          if (hop.call(bestFormat, _prop)) {
              // i. Let p be the result of calling the [[Get]] internal method of bestFormat
              //    with argument prop.
              var p = bestFormat[_prop];
              {
                  // diverging
                  p = bestFormat._ && hop.call(bestFormat._, _prop) ? bestFormat._[_prop] : p;
              }

              // ii. Set the [[<prop>]] internal property of dateTimeFormat to p.
              internal['[[' + _prop + ']]'] = p;
          }
      }

      var pattern = void 0; // Assigned a value below

      // 31. Let hr12 be the result of calling the GetOption abstract operation with
      //     arguments options, "hour12", "boolean", undefined, and undefined.
      var hr12 = GetOption(options, 'hour12', 'boolean' /*, undefined, undefined*/);

      // 32. If dateTimeFormat has an internal property [[hour]], then
      if (internal['[[hour]]']) {
          // a. If hr12 is undefined, then let hr12 be the result of calling the [[Get]]
          //    internal method of dataLocaleData with argument "hour12".
          hr12 = hr12 === undefined ? dataLocaleData.hour12 : hr12;

          // b. Set the [[hour12]] internal property of dateTimeFormat to hr12.
          internal['[[hour12]]'] = hr12;

          // c. If hr12 is true, then
          if (hr12 === true) {
              // i. Let hourNo0 be the result of calling the [[Get]] internal method of
              //    dataLocaleData with argument "hourNo0".
              var hourNo0 = dataLocaleData.hourNo0;

              // ii. Set the [[hourNo0]] internal property of dateTimeFormat to hourNo0.
              internal['[[hourNo0]]'] = hourNo0;

              // iii. Let pattern be the result of calling the [[Get]] internal method of
              //      bestFormat with argument "pattern12".
              pattern = bestFormat.pattern12;
          }

          // d. Else
          else
              // i. Let pattern be the result of calling the [[Get]] internal method of
              //    bestFormat with argument "pattern".
              pattern = bestFormat.pattern;
      }

      // 33. Else
      else
          // a. Let pattern be the result of calling the [[Get]] internal method of
          //    bestFormat with argument "pattern".
          pattern = bestFormat.pattern;

      // 34. Set the [[pattern]] internal property of dateTimeFormat to pattern.
      internal['[[pattern]]'] = pattern;

      // 35. Set the [[boundFormat]] internal property of dateTimeFormat to undefined.
      internal['[[boundFormat]]'] = undefined;

      // 36. Set the [[initializedDateTimeFormat]] internal property of dateTimeFormat to
      //     true.
      internal['[[initializedDateTimeFormat]]'] = true;

      // In ES3, we need to pre-bind the format() function
      if (es3) dateTimeFormat.format = GetFormatDateTime.call(dateTimeFormat);

      // Restore the RegExp properties
      regexpRestore();

      // Return the newly initialised object
      return dateTimeFormat;
  }

  /**
   * Several DateTimeFormat algorithms use values from the following table, which provides
   * property names and allowable values for the components of date and time formats:
   */
  var dateTimeComponents = {
      weekday: ["narrow", "short", "long"],
      era: ["narrow", "short", "long"],
      year: ["2-digit", "numeric"],
      month: ["2-digit", "numeric", "narrow", "short", "long"],
      day: ["2-digit", "numeric"],
      hour: ["2-digit", "numeric"],
      minute: ["2-digit", "numeric"],
      second: ["2-digit", "numeric"],
      timeZoneName: ["short", "long"]
  };

  /**
   * When the ToDateTimeOptions abstract operation is called with arguments options,
   * required, and defaults, the following steps are taken:
   */
  function ToDateTimeFormats(formats) {
      if (Object.prototype.toString.call(formats) === '[object Array]') {
          return formats;
      }
      return createDateTimeFormats(formats);
  }

  /**
   * When the ToDateTimeOptions abstract operation is called with arguments options,
   * required, and defaults, the following steps are taken:
   */
  function ToDateTimeOptions(options, required, defaults) {
      // 1. If options is undefined, then let options be null, else let options be
      //    ToObject(options).
      if (options === undefined) options = null;else {
          // (#12) options needs to be a Record, but it also needs to inherit properties
          var opt2 = toObject(options);
          options = new Record();

          for (var k in opt2) {
              options[k] = opt2[k];
          }
      }

      // 2. Let create be the standard built-in function object defined in ES5, 15.2.3.5.
      var create = objCreate;

      // 3. Let options be the result of calling the [[Call]] internal method of create with
      //    undefined as the this value and an argument list containing the single item
      //    options.
      options = create(options);

      // 4. Let needDefaults be true.
      var needDefaults = true;

      // 5. If required is "date" or "any", then
      if (required === 'date' || required === 'any') {
          // a. For each of the property names "weekday", "year", "month", "day":
          // i. If the result of calling the [[Get]] internal method of options with the
          //    property name is not undefined, then let needDefaults be false.
          if (options.weekday !== undefined || options.year !== undefined || options.month !== undefined || options.day !== undefined) needDefaults = false;
      }

      // 6. If required is "time" or "any", then
      if (required === 'time' || required === 'any') {
          // a. For each of the property names "hour", "minute", "second":
          // i. If the result of calling the [[Get]] internal method of options with the
          //    property name is not undefined, then let needDefaults be false.
          if (options.hour !== undefined || options.minute !== undefined || options.second !== undefined) needDefaults = false;
      }

      // 7. If needDefaults is true and defaults is either "date" or "all", then
      if (needDefaults && (defaults === 'date' || defaults === 'all'))
          // a. For each of the property names "year", "month", "day":
          // i. Call the [[DefineOwnProperty]] internal method of options with the
          //    property name, Property Descriptor {[[Value]]: "numeric", [[Writable]]:
          //    true, [[Enumerable]]: true, [[Configurable]]: true}, and false.
          options.year = options.month = options.day = 'numeric';

      // 8. If needDefaults is true and defaults is either "time" or "all", then
      if (needDefaults && (defaults === 'time' || defaults === 'all'))
          // a. For each of the property names "hour", "minute", "second":
          // i. Call the [[DefineOwnProperty]] internal method of options with the
          //    property name, Property Descriptor {[[Value]]: "numeric", [[Writable]]:
          //    true, [[Enumerable]]: true, [[Configurable]]: true}, and false.
          options.hour = options.minute = options.second = 'numeric';

      // 9. Return options.
      return options;
  }

  /**
   * When the BasicFormatMatcher abstract operation is called with two arguments options and
   * formats, the following steps are taken:
   */
  function BasicFormatMatcher(options, formats) {
      // 1. Let removalPenalty be 120.
      var removalPenalty = 120;

      // 2. Let additionPenalty be 20.
      var additionPenalty = 20;

      // 3. Let longLessPenalty be 8.
      var longLessPenalty = 8;

      // 4. Let longMorePenalty be 6.
      var longMorePenalty = 6;

      // 5. Let shortLessPenalty be 6.
      var shortLessPenalty = 6;

      // 6. Let shortMorePenalty be 3.
      var shortMorePenalty = 3;

      // 7. Let bestScore be -Infinity.
      var bestScore = -Infinity;

      // 8. Let bestFormat be undefined.
      var bestFormat = void 0;

      // 9. Let i be 0.
      var i = 0;

      // 10. Assert: formats is an Array object.

      // 11. Let len be the result of calling the [[Get]] internal method of formats with argument "length".
      var len = formats.length;

      // 12. Repeat while i < len:
      while (i < len) {
          // a. Let format be the result of calling the [[Get]] internal method of formats with argument ToString(i).
          var format = formats[i];

          // b. Let score be 0.
          var score = 0;

          // c. For each property shown in Table 3:
          for (var property in dateTimeComponents) {
              if (!hop.call(dateTimeComponents, property)) continue;

              // i. Let optionsProp be options.[[<property>]].
              var optionsProp = options['[[' + property + ']]'];

              // ii. Let formatPropDesc be the result of calling the [[GetOwnProperty]] internal method of format
              //     with argument property.
              // iii. If formatPropDesc is not undefined, then
              //     1. Let formatProp be the result of calling the [[Get]] internal method of format with argument property.
              var formatProp = hop.call(format, property) ? format[property] : undefined;

              // iv. If optionsProp is undefined and formatProp is not undefined, then decrease score by
              //     additionPenalty.
              if (optionsProp === undefined && formatProp !== undefined) score -= additionPenalty;

              // v. Else if optionsProp is not undefined and formatProp is undefined, then decrease score by
              //    removalPenalty.
              else if (optionsProp !== undefined && formatProp === undefined) score -= removalPenalty;

                  // vi. Else
                  else {
                          // 1. Let values be the array ["2-digit", "numeric", "narrow", "short",
                          //    "long"].
                          var values = ['2-digit', 'numeric', 'narrow', 'short', 'long'];

                          // 2. Let optionsPropIndex be the index of optionsProp within values.
                          var optionsPropIndex = arrIndexOf.call(values, optionsProp);

                          // 3. Let formatPropIndex be the index of formatProp within values.
                          var formatPropIndex = arrIndexOf.call(values, formatProp);

                          // 4. Let delta be max(min(formatPropIndex - optionsPropIndex, 2), -2).
                          var delta = Math.max(Math.min(formatPropIndex - optionsPropIndex, 2), -2);

                          // 5. If delta = 2, decrease score by longMorePenalty.
                          if (delta === 2) score -= longMorePenalty;

                          // 6. Else if delta = 1, decrease score by shortMorePenalty.
                          else if (delta === 1) score -= shortMorePenalty;

                              // 7. Else if delta = -1, decrease score by shortLessPenalty.
                              else if (delta === -1) score -= shortLessPenalty;

                                  // 8. Else if delta = -2, decrease score by longLessPenalty.
                                  else if (delta === -2) score -= longLessPenalty;
                      }
          }

          // d. If score > bestScore, then
          if (score > bestScore) {
              // i. Let bestScore be score.
              bestScore = score;

              // ii. Let bestFormat be format.
              bestFormat = format;
          }

          // e. Increase i by 1.
          i++;
      }

      // 13. Return bestFormat.
      return bestFormat;
  }

  /**
   * When the BestFitFormatMatcher abstract operation is called with two arguments options
   * and formats, it performs implementation dependent steps, which should return a set of
   * component representations that a typical user of the selected locale would perceive as
   * at least as good as the one returned by BasicFormatMatcher.
   *
   * This polyfill defines the algorithm to be the same as BasicFormatMatcher,
   * with the addition of bonus points awarded where the requested format is of
   * the same data type as the potentially matching format.
   *
   * This algo relies on the concept of closest distance matching described here:
   * http://unicode.org/reports/tr35/tr35-dates.html#Matching_Skeletons
   * Typically a “best match” is found using a closest distance match, such as:
   *
   * Symbols requesting a best choice for the locale are replaced.
   *      j → one of {H, k, h, K}; C → one of {a, b, B}
   * -> Covered by cldr.js matching process
   *
   * For fields with symbols representing the same type (year, month, day, etc):
   *     Most symbols have a small distance from each other.
   *         M ≅ L; E ≅ c; a ≅ b ≅ B; H ≅ k ≅ h ≅ K; ...
   *     -> Covered by cldr.js matching process
   *
   *     Width differences among fields, other than those marking text vs numeric, are given small distance from each other.
   *         MMM ≅ MMMM
   *         MM ≅ M
   *     Numeric and text fields are given a larger distance from each other.
   *         MMM ≈ MM
   *     Symbols representing substantial differences (week of year vs week of month) are given much larger a distances from each other.
   *         d ≋ D; ...
   *     Missing or extra fields cause a match to fail. (But see Missing Skeleton Fields).
   *
   *
   * For example,
   *
   *     { month: 'numeric', day: 'numeric' }
   *
   * should match
   *
   *     { month: '2-digit', day: '2-digit' }
   *
   * rather than
   *
   *     { month: 'short', day: 'numeric' }
   *
   * This makes sense because a user requesting a formatted date with numeric parts would
   * not expect to see the returned format containing narrow, short or long part names
   */
  function BestFitFormatMatcher(options, formats) {
      /** Diverging: this block implements the hack for single property configuration, eg.:
       *
       *      `new Intl.DateTimeFormat('en', {day: 'numeric'})`
       *
       * should produce a single digit with the day of the month. This is needed because
       * CLDR `availableFormats` data structure doesn't cover these cases.
       */
      {
          var optionsPropNames = [];
          for (var property in dateTimeComponents) {
              if (!hop.call(dateTimeComponents, property)) continue;

              if (options['[[' + property + ']]'] !== undefined) {
                  optionsPropNames.push(property);
              }
          }
          if (optionsPropNames.length === 1) {
              var _bestFormat = generateSyntheticFormat(optionsPropNames[0], options['[[' + optionsPropNames[0] + ']]']);
              if (_bestFormat) {
                  return _bestFormat;
              }
          }
      }

      // 1. Let removalPenalty be 120.
      var removalPenalty = 120;

      // 2. Let additionPenalty be 20.
      var additionPenalty = 20;

      // 3. Let longLessPenalty be 8.
      var longLessPenalty = 8;

      // 4. Let longMorePenalty be 6.
      var longMorePenalty = 6;

      // 5. Let shortLessPenalty be 6.
      var shortLessPenalty = 6;

      // 6. Let shortMorePenalty be 3.
      var shortMorePenalty = 3;

      var patternPenalty = 2;

      var hour12Penalty = 1;

      // 7. Let bestScore be -Infinity.
      var bestScore = -Infinity;

      // 8. Let bestFormat be undefined.
      var bestFormat = void 0;

      // 9. Let i be 0.
      var i = 0;

      // 10. Assert: formats is an Array object.

      // 11. Let len be the result of calling the [[Get]] internal method of formats with argument "length".
      var len = formats.length;

      // 12. Repeat while i < len:
      while (i < len) {
          // a. Let format be the result of calling the [[Get]] internal method of formats with argument ToString(i).
          var format = formats[i];

          // b. Let score be 0.
          var score = 0;

          // c. For each property shown in Table 3:
          for (var _property in dateTimeComponents) {
              if (!hop.call(dateTimeComponents, _property)) continue;

              // i. Let optionsProp be options.[[<property>]].
              var optionsProp = options['[[' + _property + ']]'];

              // ii. Let formatPropDesc be the result of calling the [[GetOwnProperty]] internal method of format
              //     with argument property.
              // iii. If formatPropDesc is not undefined, then
              //     1. Let formatProp be the result of calling the [[Get]] internal method of format with argument property.
              var formatProp = hop.call(format, _property) ? format[_property] : undefined;

              // Diverging: using the default properties produced by the pattern/skeleton
              // to match it with user options, and apply a penalty
              var patternProp = hop.call(format._, _property) ? format._[_property] : undefined;
              if (optionsProp !== patternProp) {
                  score -= patternPenalty;
              }

              // iv. If optionsProp is undefined and formatProp is not undefined, then decrease score by
              //     additionPenalty.
              if (optionsProp === undefined && formatProp !== undefined) score -= additionPenalty;

              // v. Else if optionsProp is not undefined and formatProp is undefined, then decrease score by
              //    removalPenalty.
              else if (optionsProp !== undefined && formatProp === undefined) score -= removalPenalty;

                  // vi. Else
                  else {
                          // 1. Let values be the array ["2-digit", "numeric", "narrow", "short",
                          //    "long"].
                          var values = ['2-digit', 'numeric', 'narrow', 'short', 'long'];

                          // 2. Let optionsPropIndex be the index of optionsProp within values.
                          var optionsPropIndex = arrIndexOf.call(values, optionsProp);

                          // 3. Let formatPropIndex be the index of formatProp within values.
                          var formatPropIndex = arrIndexOf.call(values, formatProp);

                          // 4. Let delta be max(min(formatPropIndex - optionsPropIndex, 2), -2).
                          var delta = Math.max(Math.min(formatPropIndex - optionsPropIndex, 2), -2);

                          {
                              // diverging from spec
                              // When the bestFit argument is true, subtract additional penalty where data types are not the same
                              if (formatPropIndex <= 1 && optionsPropIndex >= 2 || formatPropIndex >= 2 && optionsPropIndex <= 1) {
                                  // 5. If delta = 2, decrease score by longMorePenalty.
                                  if (delta > 0) score -= longMorePenalty;else if (delta < 0) score -= longLessPenalty;
                              } else {
                                  // 5. If delta = 2, decrease score by longMorePenalty.
                                  if (delta > 1) score -= shortMorePenalty;else if (delta < -1) score -= shortLessPenalty;
                              }
                          }
                      }
          }

          {
              // diverging to also take into consideration differences between 12 or 24 hours
              // which is special for the best fit only.
              if (format._.hour12 !== options.hour12) {
                  score -= hour12Penalty;
              }
          }

          // d. If score > bestScore, then
          if (score > bestScore) {
              // i. Let bestScore be score.
              bestScore = score;
              // ii. Let bestFormat be format.
              bestFormat = format;
          }

          // e. Increase i by 1.
          i++;
      }

      // 13. Return bestFormat.
      return bestFormat;
  }

  /* 12.2.3 */internals.DateTimeFormat = {
      '[[availableLocales]]': [],
      '[[relevantExtensionKeys]]': ['ca', 'nu'],
      '[[localeData]]': {}
  };

  /**
   * When the supportedLocalesOf method of Intl.DateTimeFormat is called, the
   * following steps are taken:
   */
  /* 12.2.2 */
  defineProperty(Intl$1.DateTimeFormat, 'supportedLocalesOf', {
      configurable: true,
      writable: true,
      value: fnBind.call(function (locales) {
          // Bound functions only have the `this` value altered if being used as a constructor,
          // this lets us imitate a native function that has no constructor
          if (!hop.call(this, '[[availableLocales]]')) throw new TypeError('supportedLocalesOf() is not a constructor');

          // Create an object whose props can be used to restore the values of RegExp props
          var regexpRestore = createRegExpRestore(),


          // 1. If options is not provided, then let options be undefined.
          options = arguments[1],


          // 2. Let availableLocales be the value of the [[availableLocales]] internal
          //    property of the standard built-in object that is the initial value of
          //    Intl.NumberFormat.

          availableLocales = this['[[availableLocales]]'],


          // 3. Let requestedLocales be the result of calling the CanonicalizeLocaleList
          //    abstract operation (defined in 9.2.1) with argument locales.
          requestedLocales = CanonicalizeLocaleList(locales);

          // Restore the RegExp properties
          regexpRestore();

          // 4. Return the result of calling the SupportedLocales abstract operation
          //    (defined in 9.2.8) with arguments availableLocales, requestedLocales,
          //    and options.
          return SupportedLocales(availableLocales, requestedLocales, options);
      }, internals.NumberFormat)
  });

  /**
   * This named accessor property returns a function that formats a number
   * according to the effective locale and the formatting options of this
   * DateTimeFormat object.
   */
  /* 12.3.2 */defineProperty(Intl$1.DateTimeFormat.prototype, 'format', {
      configurable: true,
      get: GetFormatDateTime
  });

  function GetFormatDateTime() {
      var internal = this !== null && babelHelpers$1["typeof"](this) === 'object' && getInternalProperties(this);

      // Satisfy test 12.3_b
      if (!internal || !internal['[[initializedDateTimeFormat]]']) throw new TypeError('`this` value for format() is not an initialized Intl.DateTimeFormat object.');

      // The value of the [[Get]] attribute is a function that takes the following
      // steps:

      // 1. If the [[boundFormat]] internal property of this DateTimeFormat object
      //    is undefined, then:
      if (internal['[[boundFormat]]'] === undefined) {
          // a. Let F be a Function object, with internal properties set as
          //    specified for built-in functions in ES5, 15, or successor, and the
          //    length property set to 0, that takes the argument date and
          //    performs the following steps:
          var F = function F() {
              var date = arguments.length <= 0 || arguments[0] === undefined ? undefined : arguments[0];

              //   i. If date is not provided or is undefined, then let x be the
              //      result as if by the expression Date.now() where Date.now is
              //      the standard built-in function defined in ES5, 15.9.4.4.
              //  ii. Else let x be ToNumber(date).
              // iii. Return the result of calling the FormatDateTime abstract
              //      operation (defined below) with arguments this and x.
              var x = date === undefined ? Date.now() : toNumber(date);
              return FormatDateTime(this, x);
          };
          // b. Let bind be the standard built-in function object defined in ES5,
          //    15.3.4.5.
          // c. Let bf be the result of calling the [[Call]] internal method of
          //    bind with F as the this value and an argument list containing
          //    the single item this.
          var bf = fnBind.call(F, this);
          // d. Set the [[boundFormat]] internal property of this NumberFormat
          //    object to bf.
          internal['[[boundFormat]]'] = bf;
      }
      // Return the value of the [[boundFormat]] internal property of this
      // NumberFormat object.
      return internal['[[boundFormat]]'];
  }

  function formatToParts$1() {
      var date = arguments.length <= 0 || arguments[0] === undefined ? undefined : arguments[0];

      var internal = this !== null && babelHelpers$1["typeof"](this) === 'object' && getInternalProperties(this);

      if (!internal || !internal['[[initializedDateTimeFormat]]']) throw new TypeError('`this` value for formatToParts() is not an initialized Intl.DateTimeFormat object.');

      var x = date === undefined ? Date.now() : toNumber(date);
      return FormatToPartsDateTime(this, x);
  }

  Object.defineProperty(Intl$1.DateTimeFormat.prototype, 'formatToParts', {
      enumerable: false,
      writable: true,
      configurable: true,
      value: formatToParts$1
  });

  function CreateDateTimeParts(dateTimeFormat, x) {
      // 1. If x is not a finite Number, then throw a RangeError exception.
      if (!isFinite(x)) throw new RangeError('Invalid valid date passed to format');

      var internal = dateTimeFormat.__getInternalProperties(secret);

      // Creating restore point for properties on the RegExp object... please wait
      /* let regexpRestore = */createRegExpRestore(); // ###TODO: review this

      // 2. Let locale be the value of the [[locale]] internal property of dateTimeFormat.
      var locale = internal['[[locale]]'];

      // 3. Let nf be the result of creating a new NumberFormat object as if by the
      // expression new Intl.NumberFormat([locale], {useGrouping: false}) where
      // Intl.NumberFormat is the standard built-in constructor defined in 11.1.3.
      var nf = new Intl$1.NumberFormat([locale], { useGrouping: false });

      // 4. Let nf2 be the result of creating a new NumberFormat object as if by the
      // expression new Intl.NumberFormat([locale], {minimumIntegerDigits: 2, useGrouping:
      // false}) where Intl.NumberFormat is the standard built-in constructor defined in
      // 11.1.3.
      var nf2 = new Intl$1.NumberFormat([locale], { minimumIntegerDigits: 2, useGrouping: false });

      // 5. Let tm be the result of calling the ToLocalTime abstract operation (defined
      // below) with x, the value of the [[calendar]] internal property of dateTimeFormat,
      // and the value of the [[timeZone]] internal property of dateTimeFormat.
      var tm = ToLocalTime(x, internal['[[calendar]]'], internal['[[timeZone]]']);

      // 6. Let result be the value of the [[pattern]] internal property of dateTimeFormat.
      var pattern = internal['[[pattern]]'];

      // 7.
      var result = new List();

      // 8.
      var index = 0;

      // 9.
      var beginIndex = pattern.indexOf('{');

      // 10.
      var endIndex = 0;

      // Need the locale minus any extensions
      var dataLocale = internal['[[dataLocale]]'];

      // Need the calendar data from CLDR
      var localeData = internals.DateTimeFormat['[[localeData]]'][dataLocale].calendars;
      var ca = internal['[[calendar]]'];

      // 11.
      while (beginIndex !== -1) {
          var fv = void 0;
          // a.
          endIndex = pattern.indexOf('}', beginIndex);
          // b.
          if (endIndex === -1) {
              throw new Error('Unclosed pattern');
          }
          // c.
          if (beginIndex > index) {
              arrPush.call(result, {
                  type: 'literal',
                  value: pattern.substring(index, beginIndex)
              });
          }
          // d.
          var p = pattern.substring(beginIndex + 1, endIndex);
          // e.
          if (dateTimeComponents.hasOwnProperty(p)) {
              //   i. Let f be the value of the [[<p>]] internal property of dateTimeFormat.
              var f = internal['[[' + p + ']]'];
              //  ii. Let v be the value of tm.[[<p>]].
              var v = tm['[[' + p + ']]'];
              // iii. If p is "year" and v ≤ 0, then let v be 1 - v.
              if (p === 'year' && v <= 0) {
                  v = 1 - v;
              }
              //  iv. If p is "month", then increase v by 1.
              else if (p === 'month') {
                      v++;
                  }
                  //   v. If p is "hour" and the value of the [[hour12]] internal property of
                  //      dateTimeFormat is true, then
                  else if (p === 'hour' && internal['[[hour12]]'] === true) {
                          // 1. Let v be v modulo 12.
                          v = v % 12;
                          // 2. If v is 0 and the value of the [[hourNo0]] internal property of
                          //    dateTimeFormat is true, then let v be 12.
                          if (v === 0 && internal['[[hourNo0]]'] === true) {
                              v = 12;
                          }
                      }

              //  vi. If f is "numeric", then
              if (f === 'numeric') {
                  // 1. Let fv be the result of calling the FormatNumber abstract operation
                  //    (defined in 11.3.2) with arguments nf and v.
                  fv = FormatNumber(nf, v);
              }
              // vii. Else if f is "2-digit", then
              else if (f === '2-digit') {
                      // 1. Let fv be the result of calling the FormatNumber abstract operation
                      //    with arguments nf2 and v.
                      fv = FormatNumber(nf2, v);
                      // 2. If the length of fv is greater than 2, let fv be the substring of fv
                      //    containing the last two characters.
                      if (fv.length > 2) {
                          fv = fv.slice(-2);
                      }
                  }
                  // viii. Else if f is "narrow", "short", or "long", then let fv be a String
                  //     value representing f in the desired form; the String value depends upon
                  //     the implementation and the effective locale and calendar of
                  //     dateTimeFormat. If p is "month", then the String value may also depend
                  //     on whether dateTimeFormat has a [[day]] internal property. If p is
                  //     "timeZoneName", then the String value may also depend on the value of
                  //     the [[inDST]] field of tm.
                  else if (f in dateWidths) {
                          switch (p) {
                              case 'month':
                                  fv = resolveDateString(localeData, ca, 'months', f, tm['[[' + p + ']]']);
                                  break;

                              case 'weekday':
                                  try {
                                      fv = resolveDateString(localeData, ca, 'days', f, tm['[[' + p + ']]']);
                                      // fv = resolveDateString(ca.days, f)[tm['[['+ p +']]']];
                                  } catch (e) {
                                      throw new Error('Could not find weekday data for locale ' + locale);
                                  }
                                  break;

                              case 'timeZoneName':
                                  fv = ''; // ###TODO
                                  break;

                              case 'era':
                                  try {
                                      fv = resolveDateString(localeData, ca, 'eras', f, tm['[[' + p + ']]']);
                                  } catch (e) {
                                      throw new Error('Could not find era data for locale ' + locale);
                                  }
                                  break;

                              default:
                                  fv = tm['[[' + p + ']]'];
                          }
                      }
              // ix
              arrPush.call(result, {
                  type: p,
                  value: fv
              });
              // f.
          } else if (p === 'ampm') {
              // i.
              var _v = tm['[[hour]]'];
              // ii./iii.
              fv = resolveDateString(localeData, ca, 'dayPeriods', _v > 11 ? 'pm' : 'am', null);
              // iv.
              arrPush.call(result, {
                  type: 'dayPeriod',
                  value: fv
              });
              // g.
          } else {
              arrPush.call(result, {
                  type: 'literal',
                  value: pattern.substring(beginIndex, endIndex + 1)
              });
          }
          // h.
          index = endIndex + 1;
          // i.
          beginIndex = pattern.indexOf('{', index);
      }
      // 12.
      if (endIndex < pattern.length - 1) {
          arrPush.call(result, {
              type: 'literal',
              value: pattern.substr(endIndex + 1)
          });
      }
      // 13.
      return result;
  }

  /**
   * When the FormatDateTime abstract operation is called with arguments dateTimeFormat
   * (which must be an object initialized as a DateTimeFormat) and x (which must be a Number
   * value), it returns a String value representing x (interpreted as a time value as
   * specified in ES5, 15.9.1.1) according to the effective locale and the formatting
   * options of dateTimeFormat.
   */
  function FormatDateTime(dateTimeFormat, x) {
      var parts = CreateDateTimeParts(dateTimeFormat, x);
      var result = '';

      for (var i = 0; parts.length > i; i++) {
          var part = parts[i];
          result += part.value;
      }
      return result;
  }

  function FormatToPartsDateTime(dateTimeFormat, x) {
      var parts = CreateDateTimeParts(dateTimeFormat, x);
      var result = [];
      for (var i = 0; parts.length > i; i++) {
          var part = parts[i];
          result.push({
              type: part.type,
              value: part.value
          });
      }
      return result;
  }

  /**
   * When the ToLocalTime abstract operation is called with arguments date, calendar, and
   * timeZone, the following steps are taken:
   */
  function ToLocalTime(date, calendar, timeZone) {
      // 1. Apply calendrical calculations on date for the given calendar and time zone to
      //    produce weekday, era, year, month, day, hour, minute, second, and inDST values.
      //    The calculations should use best available information about the specified
      //    calendar and time zone. If the calendar is "gregory", then the calculations must
      //    match the algorithms specified in ES5, 15.9.1, except that calculations are not
      //    bound by the restrictions on the use of best available information on time zones
      //    for local time zone adjustment and daylight saving time adjustment imposed by
      //    ES5, 15.9.1.7 and 15.9.1.8.
      // ###TODO###
      var d = new Date(date),
          m = 'get' + (timeZone || '');

      // 2. Return a Record with fields [[weekday]], [[era]], [[year]], [[month]], [[day]],
      //    [[hour]], [[minute]], [[second]], and [[inDST]], each with the corresponding
      //    calculated value.
      return new Record({
          '[[weekday]]': d[m + 'Day'](),
          '[[era]]': +(d[m + 'FullYear']() >= 0),
          '[[year]]': d[m + 'FullYear'](),
          '[[month]]': d[m + 'Month'](),
          '[[day]]': d[m + 'Date'](),
          '[[hour]]': d[m + 'Hours'](),
          '[[minute]]': d[m + 'Minutes'](),
          '[[second]]': d[m + 'Seconds'](),
          '[[inDST]]': false // ###TODO###
      });
  }

  /**
   * The function returns a new object whose properties and attributes are set as if
   * constructed by an object literal assigning to each of the following properties the
   * value of the corresponding internal property of this DateTimeFormat object (see 12.4):
   * locale, calendar, numberingSystem, timeZone, hour12, weekday, era, year, month, day,
   * hour, minute, second, and timeZoneName. Properties whose corresponding internal
   * properties are not present are not assigned.
   */
  /* 12.3.3 */defineProperty(Intl$1.DateTimeFormat.prototype, 'resolvedOptions', {
      writable: true,
      configurable: true,
      value: function value() {
          var prop = void 0,
              descs = new Record(),
              props = ['locale', 'calendar', 'numberingSystem', 'timeZone', 'hour12', 'weekday', 'era', 'year', 'month', 'day', 'hour', 'minute', 'second', 'timeZoneName'],
              internal = this !== null && babelHelpers$1["typeof"](this) === 'object' && getInternalProperties(this);

          // Satisfy test 12.3_b
          if (!internal || !internal['[[initializedDateTimeFormat]]']) throw new TypeError('`this` value for resolvedOptions() is not an initialized Intl.DateTimeFormat object.');

          for (var i = 0, max = props.length; i < max; i++) {
              if (hop.call(internal, prop = '[[' + props[i] + ']]')) descs[props[i]] = { value: internal[prop], writable: true, configurable: true, enumerable: true };
          }

          return objCreate({}, descs);
      }
  });

  var ls = Intl$1.__localeSensitiveProtos = {
      Number: {},
      Date: {}
  };

  /**
   * When the toLocaleString method is called with optional arguments locales and options,
   * the following steps are taken:
   */
  /* 13.2.1 */ls.Number.toLocaleString = function () {
      // Satisfy test 13.2.1_1
      if (Object.prototype.toString.call(this) !== '[object Number]') throw new TypeError('`this` value must be a number for Number.prototype.toLocaleString()');

      // 1. Let x be this Number value (as defined in ES5, 15.7.4).
      // 2. If locales is not provided, then let locales be undefined.
      // 3. If options is not provided, then let options be undefined.
      // 4. Let numberFormat be the result of creating a new object as if by the
      //    expression new Intl.NumberFormat(locales, options) where
      //    Intl.NumberFormat is the standard built-in constructor defined in 11.1.3.
      // 5. Return the result of calling the FormatNumber abstract operation
      //    (defined in 11.3.2) with arguments numberFormat and x.
      return FormatNumber(new NumberFormatConstructor(arguments[0], arguments[1]), this);
  };

  /**
   * When the toLocaleString method is called with optional arguments locales and options,
   * the following steps are taken:
   */
  /* 13.3.1 */ls.Date.toLocaleString = function () {
      // Satisfy test 13.3.0_1
      if (Object.prototype.toString.call(this) !== '[object Date]') throw new TypeError('`this` value must be a Date instance for Date.prototype.toLocaleString()');

      // 1. Let x be this time value (as defined in ES5, 15.9.5).
      var x = +this;

      // 2. If x is NaN, then return "Invalid Date".
      if (isNaN(x)) return 'Invalid Date';

      // 3. If locales is not provided, then let locales be undefined.
      var locales = arguments[0];

      // 4. If options is not provided, then let options be undefined.
      var options = arguments[1];

      // 5. Let options be the result of calling the ToDateTimeOptions abstract
      //    operation (defined in 12.1.1) with arguments options, "any", and "all".
      options = ToDateTimeOptions(options, 'any', 'all');

      // 6. Let dateTimeFormat be the result of creating a new object as if by the
      //    expression new Intl.DateTimeFormat(locales, options) where
      //    Intl.DateTimeFormat is the standard built-in constructor defined in 12.1.3.
      var dateTimeFormat = new DateTimeFormatConstructor(locales, options);

      // 7. Return the result of calling the FormatDateTime abstract operation (defined
      //    in 12.3.2) with arguments dateTimeFormat and x.
      return FormatDateTime(dateTimeFormat, x);
  };

  /**
   * When the toLocaleDateString method is called with optional arguments locales and
   * options, the following steps are taken:
   */
  /* 13.3.2 */ls.Date.toLocaleDateString = function () {
      // Satisfy test 13.3.0_1
      if (Object.prototype.toString.call(this) !== '[object Date]') throw new TypeError('`this` value must be a Date instance for Date.prototype.toLocaleDateString()');

      // 1. Let x be this time value (as defined in ES5, 15.9.5).
      var x = +this;

      // 2. If x is NaN, then return "Invalid Date".
      if (isNaN(x)) return 'Invalid Date';

      // 3. If locales is not provided, then let locales be undefined.
      var locales = arguments[0],


      // 4. If options is not provided, then let options be undefined.
      options = arguments[1];

      // 5. Let options be the result of calling the ToDateTimeOptions abstract
      //    operation (defined in 12.1.1) with arguments options, "date", and "date".
      options = ToDateTimeOptions(options, 'date', 'date');

      // 6. Let dateTimeFormat be the result of creating a new object as if by the
      //    expression new Intl.DateTimeFormat(locales, options) where
      //    Intl.DateTimeFormat is the standard built-in constructor defined in 12.1.3.
      var dateTimeFormat = new DateTimeFormatConstructor(locales, options);

      // 7. Return the result of calling the FormatDateTime abstract operation (defined
      //    in 12.3.2) with arguments dateTimeFormat and x.
      return FormatDateTime(dateTimeFormat, x);
  };

  /**
   * When the toLocaleTimeString method is called with optional arguments locales and
   * options, the following steps are taken:
   */
  /* 13.3.3 */ls.Date.toLocaleTimeString = function () {
      // Satisfy test 13.3.0_1
      if (Object.prototype.toString.call(this) !== '[object Date]') throw new TypeError('`this` value must be a Date instance for Date.prototype.toLocaleTimeString()');

      // 1. Let x be this time value (as defined in ES5, 15.9.5).
      var x = +this;

      // 2. If x is NaN, then return "Invalid Date".
      if (isNaN(x)) return 'Invalid Date';

      // 3. If locales is not provided, then let locales be undefined.
      var locales = arguments[0];

      // 4. If options is not provided, then let options be undefined.
      var options = arguments[1];

      // 5. Let options be the result of calling the ToDateTimeOptions abstract
      //    operation (defined in 12.1.1) with arguments options, "time", and "time".
      options = ToDateTimeOptions(options, 'time', 'time');

      // 6. Let dateTimeFormat be the result of creating a new object as if by the
      //    expression new Intl.DateTimeFormat(locales, options) where
      //    Intl.DateTimeFormat is the standard built-in constructor defined in 12.1.3.
      var dateTimeFormat = new DateTimeFormatConstructor(locales, options);

      // 7. Return the result of calling the FormatDateTime abstract operation (defined
      //    in 12.3.2) with arguments dateTimeFormat and x.
      return FormatDateTime(dateTimeFormat, x);
  };

  defineProperty(Intl$1, '__applyLocaleSensitivePrototypes', {
      writable: true,
      configurable: true,
      value: function value() {
          defineProperty(Number.prototype, 'toLocaleString', { writable: true, configurable: true, value: ls.Number.toLocaleString });
          // Need this here for IE 8, to avoid the _DontEnum_ bug
          defineProperty(Date.prototype, 'toLocaleString', { writable: true, configurable: true, value: ls.Date.toLocaleString });

          for (var k in ls.Date) {
              if (hop.call(ls.Date, k)) defineProperty(Date.prototype, k, { writable: true, configurable: true, value: ls.Date[k] });
          }
      }
  });

  /**
   * Can't really ship a single script with data for hundreds of locales, so we provide
   * this __addLocaleData method as a means for the developer to add the data on an
   * as-needed basis
   */
  defineProperty(Intl$1, '__addLocaleData', {
      value: function value(data) {
          if (!IsStructurallyValidLanguageTag(data.locale)) throw new Error("Object passed doesn't identify itself with a valid language tag");

          addLocaleData(data, data.locale);
      }
  });

  function addLocaleData(data, tag) {
      // Both NumberFormat and DateTimeFormat require number data, so throw if it isn't present
      if (!data.number) throw new Error("Object passed doesn't contain locale data for Intl.NumberFormat");

      var locale = void 0,
          locales = [tag],
          parts = tag.split('-');

      // Create fallbacks for locale data with scripts, e.g. Latn, Hans, Vaii, etc
      if (parts.length > 2 && parts[1].length === 4) arrPush.call(locales, parts[0] + '-' + parts[2]);

      while (locale = arrShift.call(locales)) {
          // Add to NumberFormat internal properties as per 11.2.3
          arrPush.call(internals.NumberFormat['[[availableLocales]]'], locale);
          internals.NumberFormat['[[localeData]]'][locale] = data.number;

          // ...and DateTimeFormat internal properties as per 12.2.3
          if (data.date) {
              data.date.nu = data.number.nu;
              arrPush.call(internals.DateTimeFormat['[[availableLocales]]'], locale);
              internals.DateTimeFormat['[[localeData]]'][locale] = data.date;
          }
      }

      // If this is the first set of locale data added, make it the default
      if (defaultLocale === undefined) setDefaultLocale(tag);
  }

  defineProperty(Intl$1, '__disableRegExpRestore', {
      value: function value() {
          internals.disableRegExpRestore = true;
      }
  });

  // hack to export the polyfill as global Intl if needed
  if (typeof Intl === 'undefined') {
      try {
          window.Intl = Intl$1;
          Intl$1.__applyLocaleSensitivePrototypes();
      } catch (e) {
          // can be read only property
      }
  }

  return Intl$1;

}));
//# sourceMappingURL=Intl.js.map