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    var extendStatics = function (d, b) {
        extendStatics = Object.setPrototypeOf ||
            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
            function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
        return extendStatics(d, b);
    };
    return function (d, b) {
        extendStatics(d, b);
        function __() { this.constructor = d; }
        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
    };
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    __assign = Object.assign || function(t) {
        for (var s, i = 1, n = arguments.length; i < n; i++) {
            s = arguments[i];
            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
                t[p] = s[p];
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    };
    return __assign.apply(this, arguments);
};
import { getCanonicalLocales } from './get-canonical-locales';
import { invariant } from './invariant';
import { toObject, getOption } from './polyfill-utils';
export function createResolveLocale(getDefaultLocale) {
    var lookupMatcher = createLookupMatcher(getDefaultLocale);
    var bestFitMatcher = createBestFitMatcher(getDefaultLocale);
    /**
     * https://tc39.es/ecma402/#sec-resolvelocale
     */
    return function resolveLocale(availableLocales, requestedLocales, options, relevantExtensionKeys, localeData) {
        var matcher = options.localeMatcher;
        var r;
        if (matcher === 'lookup') {
            r = lookupMatcher(availableLocales, requestedLocales);
        }
        else {
            r = bestFitMatcher(availableLocales, requestedLocales);
        }
        var foundLocale = r.locale;
        var result = { locale: '', dataLocale: foundLocale };
        var supportedExtension = '-u';
        for (var _i = 0, relevantExtensionKeys_1 = relevantExtensionKeys; _i < relevantExtensionKeys_1.length; _i++) {
            var key = relevantExtensionKeys_1[_i];
            var foundLocaleData = localeData[foundLocale];
            invariant(typeof foundLocaleData === 'object' && foundLocaleData !== null, "locale data " + key + " must be an object");
            var keyLocaleData = foundLocaleData[key];
            invariant(Array.isArray(keyLocaleData), "keyLocaleData for " + key + " must be an array");
            var value = keyLocaleData[0];
            invariant(typeof value === 'string' || value === null, 'value must be string or null');
            var supportedExtensionAddition = '';
            if (r.extension) {
                var requestedValue = unicodeExtensionValue(r.extension, key);
                if (requestedValue !== undefined) {
                    if (requestedValue !== '') {
                        if (~keyLocaleData.indexOf(requestedValue)) {
                            value = requestedValue;
                            supportedExtensionAddition = "-" + key + "-" + value;
                        }
                    }
                    else if (~requestedValue.indexOf('true')) {
                        value = 'true';
                        supportedExtensionAddition = "-" + key;
                    }
                }
            }
            if (key in options) {
                var optionsValue = options[key];
                invariant(typeof optionsValue === 'string' ||
                    typeof optionsValue === 'undefined' ||
                    optionsValue === null, 'optionsValue must be String, Undefined or Null');
                if (~keyLocaleData.indexOf(optionsValue)) {
                    if (optionsValue !== value) {
                        value = optionsValue;
                        supportedExtensionAddition = '';
                    }
                }
            }
            result[key] = value;
            supportedExtension += supportedExtensionAddition;
        }
        if (supportedExtension.length > 2) {
            var privateIndex = foundLocale.indexOf('-x-');
            if (privateIndex === -1) {
                foundLocale = foundLocale + supportedExtension;
            }
            else {
                var preExtension = foundLocale.slice(0, privateIndex);
                var postExtension = foundLocale.slice(privateIndex, foundLocale.length);
                foundLocale = preExtension + supportedExtension + postExtension;
            }
            foundLocale = getCanonicalLocales(foundLocale)[0];
        }
        result.locale = foundLocale;
        return result;
    };
}
/**
 * https://tc39.es/ecma402/#sec-unicodeextensionvalue
 * @param extension
 * @param key
 */
function unicodeExtensionValue(extension, key) {
    invariant(key.length === 2, 'key must have 2 elements');
    var size = extension.length;
    var searchValue = "-" + key + "-";
    var pos = extension.indexOf(searchValue);
    if (pos !== -1) {
        var start = pos + 4;
        var end = start;
        var k = start;
        var done = false;
        while (!done) {
            var e = extension.indexOf('-', k);
            var len = void 0;
            if (e === -1) {
                len = size - k;
            }
            else {
                len = e - k;
            }
            if (len === 2) {
                done = true;
            }
            else if (e === -1) {
                end = size;
                done = true;
            }
            else {
                end = e;
                k = e + 1;
            }
        }
        return extension.slice(start, end);
    }
    searchValue = "-" + key;
    pos = extension.indexOf(searchValue);
    if (pos !== -1 && pos + 3 === size) {
        return '';
    }
    return undefined;
}
var UNICODE_EXTENSION_SEQUENCE_REGEX = /-u(?:-[0-9a-z]{2,8})+/gi;
/**
 * https://tc39.es/ecma402/#sec-bestavailablelocale
 * @param availableLocales
 * @param locale
 */
function bestAvailableLocale(availableLocales, locale) {
    var candidate = locale;
    while (true) {
        if (~availableLocales.indexOf(candidate)) {
            return candidate;
        }
        var pos = candidate.lastIndexOf('-');
        if (!~pos) {
            return undefined;
        }
        if (pos >= 2 && candidate[pos - 2] === '-') {
            pos -= 2;
        }
        candidate = candidate.slice(0, pos);
    }
}
function createLookupMatcher(getDefaultLocale) {
    /**
     * https://tc39.es/ecma402/#sec-lookupmatcher
     */
    return function lookupMatcher(availableLocales, requestedLocales) {
        var result = { locale: '' };
        for (var _i = 0, requestedLocales_1 = requestedLocales; _i < requestedLocales_1.length; _i++) {
            var locale = requestedLocales_1[_i];
            var noExtensionLocale = locale.replace(UNICODE_EXTENSION_SEQUENCE_REGEX, '');
            var availableLocale = bestAvailableLocale(availableLocales, noExtensionLocale);
            if (availableLocale) {
                result.locale = availableLocale;
                if (locale !== noExtensionLocale) {
                    result.extension = locale.slice(noExtensionLocale.length + 1, locale.length);
                }
                return result;
            }
        }
        result.locale = getDefaultLocale();
        return result;
    };
}
function createBestFitMatcher(getDefaultLocale) {
    return function bestFitMatcher(availableLocales, requestedLocales) {
        var result = { locale: '' };
        for (var _i = 0, requestedLocales_2 = requestedLocales; _i < requestedLocales_2.length; _i++) {
            var locale = requestedLocales_2[_i];
            var noExtensionLocale = locale.replace(UNICODE_EXTENSION_SEQUENCE_REGEX, '');
            var availableLocale = bestAvailableLocale(availableLocales, noExtensionLocale);
            if (availableLocale) {
                result.locale = availableLocale;
                if (locale !== noExtensionLocale) {
                    result.extension = locale.slice(noExtensionLocale.length + 1, locale.length);
                }
                return result;
            }
        }
        result.locale = getDefaultLocale();
        return result;
    };
}
export function getLocaleHierarchy(locale, aliases, parentLocales) {
    var results = [locale];
    if (aliases[locale]) {
        locale = aliases[locale];
        results.push(locale);
    }
    var parentLocale = parentLocales[locale];
    if (parentLocale) {
        results.push(parentLocale);
    }
    var localeParts = locale.split('-');
    for (var i = localeParts.length; i > 1; i--) {
        results.push(localeParts.slice(0, i - 1).join('-'));
    }
    return results;
}
function lookupSupportedLocales(availableLocales, requestedLocales) {
    var subset = [];
    for (var _i = 0, requestedLocales_3 = requestedLocales; _i < requestedLocales_3.length; _i++) {
        var locale = requestedLocales_3[_i];
        var noExtensionLocale = locale.replace(UNICODE_EXTENSION_SEQUENCE_REGEX, '');
        var availableLocale = bestAvailableLocale(availableLocales, noExtensionLocale);
        if (availableLocale) {
            subset.push(availableLocale);
        }
    }
    return subset;
}
export function supportedLocales(availableLocales, requestedLocales, options) {
    var matcher = 'best fit';
    if (options !== undefined) {
        options = toObject(options);
        matcher = getOption(options, 'localeMatcher', 'string', ['lookup', 'best fit'], 'best fit');
    }
    if (matcher === 'best fit') {
        return lookupSupportedLocales(availableLocales, requestedLocales);
    }
    return lookupSupportedLocales(availableLocales, requestedLocales);
}
var MissingLocaleDataError = /** @class */ (function (_super) {
    __extends(MissingLocaleDataError, _super);
    function MissingLocaleDataError() {
        var _this = _super !== null && _super.apply(this, arguments) || this;
        _this.type = 'MISSING_LOCALE_DATA';
        return _this;
    }
    return MissingLocaleDataError;
}(Error));
export function isMissingLocaleDataError(e) {
    return e.type === 'MISSING_LOCALE_DATA';
}
export function unpackData(locale, localeData, 
/** By default shallow merge the dictionaries. */
reducer) {
    if (reducer === void 0) { reducer = function (all, d) { return (__assign(__assign({}, all), d)); }; }
    var localeHierarchy = getLocaleHierarchy(locale, localeData.aliases, localeData.parentLocales);
    var dataToMerge = localeHierarchy
        .map(function (l) { return localeData.data[l]; })
        .filter(Boolean);
    if (!dataToMerge.length) {
        throw new MissingLocaleDataError("Missing locale data for \"" + locale + "\", lookup hierarchy: " + localeHierarchy.join(', '));
    }
    dataToMerge.reverse();
    return dataToMerge.reduce(reducer, {});
}
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