jiuyiUniapp/shop/utils/vue-i18n.js

/*!
 * vue-i18n v8.18.2
 * (c) 2020 kazuya kawaguchi
 * Released under the MIT License.
 */
(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
		typeof define === 'function' && define.amd ? define(factory) :
			(global.VueI18n = factory());
}(this, (function () {
	'use strict';

	/*  */

	/**
	 * constants
	 */

	var numberFormatKeys = [
		'style',
		'currency',
		'currencyDisplay',
		'useGrouping',
		'minimumIntegerDigits',
		'minimumFractionDigits',
		'maximumFractionDigits',
		'minimumSignificantDigits',
		'maximumSignificantDigits',
		'localeMatcher',
		'formatMatcher',
		'unit'
	];

	/**
	 * utilities
	 */

	function warn(msg, err) {
		if (typeof console !== 'undefined') {
			console.warn('[vue-i18n] ' + msg);
			/* istanbul ignore if */
			if (err) {
				console.warn(err.stack);
			}
		}
	}

	function error(msg, err) {
		if (typeof console !== 'undefined') {
			console.error('[vue-i18n] ' + msg);
			/* istanbul ignore if */
			if (err) {
				console.error(err.stack);
			}
		}
	}

	var isArray = Array.isArray;

	function isObject(obj) {
		return obj !== null && typeof obj === 'object'
	}

	function isBoolean(val) {
		return typeof val === 'boolean'
	}

	function isString(val) {
		return typeof val === 'string'
	}

	var toString = Object.prototype.toString;
	var OBJECT_STRING = '[object Object]';

	function isPlainObject(obj) {
		return toString.call(obj) === OBJECT_STRING
	}

	function isNull(val) {
		return val === null || val === undefined
	}

	function parseArgs() {
		var args = [], len = arguments.length;
		while (len--) args[len] = arguments[len];

		var locale = null;
		var params = null;
		if (args.length === 1) {
			if (isObject(args[0]) || Array.isArray(args[0])) {
				params = args[0];
			} else if (typeof args[0] === 'string') {
				locale = args[0];
			}
		} else if (args.length === 2) {
			if (typeof args[0] === 'string') {
				locale = args[0];
			}
			/* istanbul ignore if */
			if (isObject(args[1]) || Array.isArray(args[1])) {
				params = args[1];
			}
		}

		return {locale: locale, params: params}
	}

	function looseClone(obj) {
		return JSON.parse(JSON.stringify(obj))
	}

	function remove(arr, item) {
		if (arr.length) {
			var index = arr.indexOf(item);
			if (index > -1) {
				return arr.splice(index, 1)
			}
		}
	}

	function includes(arr, item) {
		return !!~arr.indexOf(item)
	}

	var hasOwnProperty = Object.prototype.hasOwnProperty;

	function hasOwn(obj, key) {
		return hasOwnProperty.call(obj, key)
	}

	function merge(target) {
		var arguments$1 = arguments;

		var output = Object(target);
		for (var i = 1; i < arguments.length; i++) {
			var source = arguments$1[i];
			if (source !== undefined && source !== null) {
				var key = (void 0);
				for (key in source) {
					if (hasOwn(source, key)) {
						if (isObject(source[key])) {
							output[key] = merge(output[key], source[key]);
						} else {
							output[key] = source[key];
						}
					}
				}
			}
		}
		return output
	}

	function looseEqual(a, b) {
		if (a === b) {
			return true
		}
		var isObjectA = isObject(a);
		var isObjectB = isObject(b);
		if (isObjectA && isObjectB) {
			try {
				var isArrayA = Array.isArray(a);
				var isArrayB = Array.isArray(b);
				if (isArrayA && isArrayB) {
					return a.length === b.length && a.every(function (e, i) {
						return looseEqual(e, b[i])
					})
				} else if (!isArrayA && !isArrayB) {
					var keysA = Object.keys(a);
					var keysB = Object.keys(b);
					return keysA.length === keysB.length && keysA.every(function (key) {
						return looseEqual(a[key], b[key])
					})
				} else {
					/* istanbul ignore next */
					return false
				}
			} catch (e) {
				/* istanbul ignore next */
				return false
			}
		} else if (!isObjectA && !isObjectB) {
			return String(a) === String(b)
		} else {
			return false
		}
	}

	/*  */

	function extend(Vue) {
		if (!Vue.prototype.hasOwnProperty('$i18n')) {
			// $FlowFixMe
			Object.defineProperty(Vue.prototype, '$i18n', {
				get: function get() {
					return this._i18n
				}
			});
		}

		Vue.prototype.$t = function (key) {
			var values = [], len = arguments.length - 1;
			while (len-- > 0) values[len] = arguments[len + 1];

			var i18n = this.$i18n;
			return i18n._t.apply(i18n, [key, i18n.locale, i18n._getMessages(), this].concat(values))
		};

		Vue.prototype.$tc = function (key, choice) {
			var values = [], len = arguments.length - 2;
			while (len-- > 0) values[len] = arguments[len + 2];

			var i18n = this.$i18n;
			return i18n._tc.apply(i18n, [key, i18n.locale, i18n._getMessages(), this, choice].concat(values))
		};

		Vue.prototype.$te = function (key, locale) {
			var i18n = this.$i18n;
			return i18n._te(key, i18n.locale, i18n._getMessages(), locale)
		};

		Vue.prototype.$d = function (value) {
			var ref;

			var args = [], len = arguments.length - 1;
			while (len-- > 0) args[len] = arguments[len + 1];
			return (ref = this.$i18n).d.apply(ref, [value].concat(args))
		};

		Vue.prototype.$n = function (value) {
			var ref;

			var args = [], len = arguments.length - 1;
			while (len-- > 0) args[len] = arguments[len + 1];
			return (ref = this.$i18n).n.apply(ref, [value].concat(args))
		};
	}

	/*  */

	var mixin = {
		beforeCreate: function beforeCreate() {
			var options = this.$options;
			options.i18n = options.i18n || (options.__i18n ? {} : null);

			if (options.i18n) {
				if (options.i18n instanceof VueI18n) {
					// init locale messages via custom blocks
					if (options.__i18n) {
						try {
							var localeMessages = {};
							options.__i18n.forEach(function (resource) {
								localeMessages = merge(localeMessages, JSON.parse(resource));
							});
							Object.keys(localeMessages).forEach(function (locale) {
								options.i18n.mergeLocaleMessage(locale, localeMessages[locale]);
							});
						} catch (e) {
							{
								error("Cannot parse locale messages via custom blocks.", e);
							}
						}
					}
					this._i18n = options.i18n;
					this._i18nWatcher = this._i18n.watchI18nData();
				} else if (isPlainObject(options.i18n)) {
					var rootI18n = this.$root && this.$root.$i18n && this.$root.$i18n instanceof VueI18n
						? this.$root.$i18n
						: null;
					// component local i18n
					if (rootI18n) {
						options.i18n.root = this.$root;
						options.i18n.formatter = rootI18n.formatter;
						options.i18n.fallbackLocale = rootI18n.fallbackLocale;
						options.i18n.formatFallbackMessages = rootI18n.formatFallbackMessages;
						options.i18n.silentTranslationWarn = rootI18n.silentTranslationWarn;
						options.i18n.silentFallbackWarn = rootI18n.silentFallbackWarn;
						options.i18n.pluralizationRules = rootI18n.pluralizationRules;
						options.i18n.preserveDirectiveContent = rootI18n.preserveDirectiveContent;
					}

					// init locale messages via custom blocks
					if (options.__i18n) {
						try {
							var localeMessages$1 = {};
							options.__i18n.forEach(function (resource) {
								localeMessages$1 = merge(localeMessages$1, JSON.parse(resource));
							});
							options.i18n.messages = localeMessages$1;
						} catch (e) {
							{
								warn("Cannot parse locale messages via custom blocks.", e);
							}
						}
					}

					var ref = options.i18n;
					var sharedMessages = ref.sharedMessages;
					if (sharedMessages && isPlainObject(sharedMessages)) {
						options.i18n.messages = merge(options.i18n.messages, sharedMessages);
					}

					this._i18n = new VueI18n(options.i18n);
					this._i18nWatcher = this._i18n.watchI18nData();

					if (options.i18n.sync === undefined || !!options.i18n.sync) {
						this._localeWatcher = this.$i18n.watchLocale();
					}

					if (rootI18n) {
						rootI18n.onComponentInstanceCreated(this._i18n);
					}
				} else {
					{
						warn("Cannot be interpreted 'i18n' option.");
					}
				}
			} else if (this.$root && this.$root.$i18n && this.$root.$i18n instanceof VueI18n) {
				// root i18n
				this._i18n = this.$root.$i18n;
			} else if (options.parent && options.parent.$i18n && options.parent.$i18n instanceof VueI18n) {
				// parent i18n
				this._i18n = options.parent.$i18n;
			}
		},

		beforeMount: function beforeMount() {
			var options = this.$options;
			options.i18n = options.i18n || (options.__i18n ? {} : null);

			if (options.i18n) {
				if (options.i18n instanceof VueI18n) {
					// init locale messages via custom blocks
					this._i18n.subscribeDataChanging(this);
					this._subscribing = true;
				} else if (isPlainObject(options.i18n)) {
					this._i18n.subscribeDataChanging(this);
					this._subscribing = true;
				} else {
					{
						warn("Cannot be interpreted 'i18n' option.");
					}
				}
			} else if (this.$root && this.$root.$i18n && this.$root.$i18n instanceof VueI18n) {
				this._i18n.subscribeDataChanging(this);
				this._subscribing = true;
			} else if (options.parent && options.parent.$i18n && options.parent.$i18n instanceof VueI18n) {
				this._i18n.subscribeDataChanging(this);
				this._subscribing = true;
			}
		},

		beforeDestroy: function beforeDestroy() {
			if (!this._i18n) {
				return
			}

			var self = this;
			this.$nextTick(function () {
				if (self._subscribing) {
					self._i18n.unsubscribeDataChanging(self);
					delete self._subscribing;
				}

				if (self._i18nWatcher) {
					self._i18nWatcher();
					self._i18n.destroyVM();
					delete self._i18nWatcher;
				}

				if (self._localeWatcher) {
					self._localeWatcher();
					delete self._localeWatcher;
				}
			});
		}
	};

	/*  */

	var interpolationComponent = {
		name: 'i18n',
		functional: true,
		props: {
			tag: {
				type: [String, Boolean],
				default: 'span'
			},
			path: {
				type: String,
				required: true
			},
			locale: {
				type: String
			},
			places: {
				type: [Array, Object]
			}
		},
		render: function render(h, ref) {
			var data = ref.data;
			var parent = ref.parent;
			var props = ref.props;
			var slots = ref.slots;

			var $i18n = parent.$i18n;
			if (!$i18n) {
				{
					warn('Cannot find VueI18n instance!');
				}
				return
			}

			var path = props.path;
			var locale = props.locale;
			var places = props.places;
			var params = slots();
			var children = $i18n.i(
				path,
				locale,
				onlyHasDefaultPlace(params) || places
					? useLegacyPlaces(params.default, places)
					: params
			);

			var tag = (!!props.tag && props.tag !== true) || props.tag === false ? props.tag : 'span';
			return tag ? h(tag, data, children) : children
		}
	};

	function onlyHasDefaultPlace(params) {
		var prop;
		for (prop in params) {
			if (prop !== 'default') {
				return false
			}
		}
		return Boolean(prop)
	}

	function useLegacyPlaces(children, places) {
		var params = places ? createParamsFromPlaces(places) : {};

		if (!children) {
			return params
		}

		// Filter empty text nodes
		children = children.filter(function (child) {
			return child.tag || child.text.trim() !== ''
		});

		var everyPlace = children.every(vnodeHasPlaceAttribute);
		if (everyPlace) {
			warn('`place` attribute is deprecated in next major version. Please switch to Vue slots.');
		}

		return children.reduce(
			everyPlace ? assignChildPlace : assignChildIndex,
			params
		)
	}

	function createParamsFromPlaces(places) {
		{
			warn('`places` prop is deprecated in next major version. Please switch to Vue slots.');
		}

		return Array.isArray(places)
			? places.reduce(assignChildIndex, {})
			: Object.assign({}, places)
	}

	function assignChildPlace(params, child) {
		if (child.data && child.data.attrs && child.data.attrs.place) {
			params[child.data.attrs.place] = child;
		}
		return params
	}

	function assignChildIndex(params, child, index) {
		params[index] = child;
		return params
	}

	function vnodeHasPlaceAttribute(vnode) {
		return Boolean(vnode.data && vnode.data.attrs && vnode.data.attrs.place)
	}

	/*  */

	var numberComponent = {
		name: 'i18n-n',
		functional: true,
		props: {
			tag: {
				type: [String, Boolean],
				default: 'span'
			},
			value: {
				type: Number,
				required: true
			},
			format: {
				type: [String, Object]
			},
			locale: {
				type: String
			}
		},
		render: function render(h, ref) {
			var props = ref.props;
			var parent = ref.parent;
			var data = ref.data;

			var i18n = parent.$i18n;

			if (!i18n) {
				{
					warn('Cannot find VueI18n instance!');
				}
				return null
			}

			var key = null;
			var options = null;

			if (isString(props.format)) {
				key = props.format;
			} else if (isObject(props.format)) {
				if (props.format.key) {
					key = props.format.key;
				}

				// Filter out number format options only
				options = Object.keys(props.format).reduce(function (acc, prop) {
					var obj;

					if (includes(numberFormatKeys, prop)) {
						return Object.assign({}, acc, (obj = {}, obj[prop] = props.format[prop], obj))
					}
					return acc
				}, null);
			}

			var locale = props.locale || i18n.locale;
			var parts = i18n._ntp(props.value, locale, key, options);

			var values = parts.map(function (part, index) {
				var obj;

				var slot = data.scopedSlots && data.scopedSlots[part.type];
				return slot ? slot((obj = {}, obj[part.type] = part.value, obj.index = index, obj.parts = parts, obj)) : part.value
			});

			var tag = (!!props.tag && props.tag !== true) || props.tag === false ? props.tag : 'span';
			return tag
				? h(tag, {
					attrs: data.attrs,
					'class': data['class'],
					staticClass: data.staticClass
				}, values)
				: values
		}
	};

	/*  */

	function bind(el, binding, vnode) {
		if (!assert(el, vnode)) {
			return
		}

		t(el, binding, vnode);
	}

	function update(el, binding, vnode, oldVNode) {
		if (!assert(el, vnode)) {
			return
		}

		var i18n = vnode.context.$i18n;
		if (localeEqual(el, vnode) &&
			(looseEqual(binding.value, binding.oldValue) &&
				looseEqual(el._localeMessage, i18n.getLocaleMessage(i18n.locale)))) {
			return
		}

		t(el, binding, vnode);
	}

	function unbind(el, binding, vnode, oldVNode) {
		var vm = vnode.context;
		if (!vm) {
			warn('Vue instance does not exists in VNode context');
			return
		}

		var i18n = vnode.context.$i18n || {};
		if (!binding.modifiers.preserve && !i18n.preserveDirectiveContent) {
			el.textContent = '';
		}
		el._vt = undefined;
		delete el['_vt'];
		el._locale = undefined;
		delete el['_locale'];
		el._localeMessage = undefined;
		delete el['_localeMessage'];
	}

	function assert(el, vnode) {
		var vm = vnode.context;
		if (!vm) {
			warn('Vue instance does not exists in VNode context');
			return false
		}

		if (!vm.$i18n) {
			warn('VueI18n instance does not exists in Vue instance');
			return false
		}

		return true
	}

	function localeEqual(el, vnode) {
		var vm = vnode.context;
		return el._locale === vm.$i18n.locale
	}

	function t(el, binding, vnode) {
		var ref$1, ref$2;

		var value = binding.value;

		var ref = parseValue(value);
		var path = ref.path;
		var locale = ref.locale;
		var args = ref.args;
		var choice = ref.choice;
		if (!path && !locale && !args) {
			warn('value type not supported');
			return
		}

		if (!path) {
			warn('`path` is required in v-t directive');
			return
		}

		var vm = vnode.context;
		if (choice != null) {
			el._vt = el.textContent = (ref$1 = vm.$i18n).tc.apply(ref$1, [path, choice].concat(makeParams(locale, args)));
		} else {
			el._vt = el.textContent = (ref$2 = vm.$i18n).t.apply(ref$2, [path].concat(makeParams(locale, args)));
		}
		el._locale = vm.$i18n.locale;
		el._localeMessage = vm.$i18n.getLocaleMessage(vm.$i18n.locale);
	}

	function parseValue(value) {
		var path;
		var locale;
		var args;
		var choice;

		if (isString(value)) {
			path = value;
		} else if (isPlainObject(value)) {
			path = value.path;
			locale = value.locale;
			args = value.args;
			choice = value.choice;
		}

		return {path: path, locale: locale, args: args, choice: choice}
	}

	function makeParams(locale, args) {
		var params = [];

		locale && params.push(locale);
		if (args && (Array.isArray(args) || isPlainObject(args))) {
			params.push(args);
		}

		return params
	}

	var Vue;

	function install(_Vue) {
		/* istanbul ignore if */
		if (install.installed && _Vue === Vue) {
			warn('already installed.');
			return
		}
		install.installed = true;

		Vue = _Vue;

		var version = (Vue.version && Number(Vue.version.split('.')[0])) || -1;
		/* istanbul ignore if */
		if (version < 2) {
			warn(("vue-i18n (" + (install.version) + ") need to use Vue 2.0 or later (Vue: " + (Vue.version) + ")."));
			return
		}

		extend(Vue);
		Vue.mixin(mixin);
		Vue.directive('t', {bind: bind, update: update, unbind: unbind});
		Vue.component(interpolationComponent.name, interpolationComponent);
		Vue.component(numberComponent.name, numberComponent);

		// use simple mergeStrategies to prevent i18n instance lose '__proto__'
		var strats = Vue.config.optionMergeStrategies;
		strats.i18n = function (parentVal, childVal) {
			return childVal === undefined
				? parentVal
				: childVal
		};
	}

	/*  */

	var BaseFormatter = function BaseFormatter() {
		this._caches = Object.create(null);
	};

	BaseFormatter.prototype.interpolate = function interpolate(message, values) {
		if (!values) {
			return [message]
		}
		var tokens = this._caches[message];
		if (!tokens) {
			tokens = parse(message);
			this._caches[message] = tokens;
		}
		return compile(tokens, values)
	};


	var RE_TOKEN_LIST_VALUE = /^(?:\d)+/;
	var RE_TOKEN_NAMED_VALUE = /^(?:\w)+/;

	function parse(format) {
		var tokens = [];
		var position = 0;

		var text = '';
		while (position < format.length) {
			var char = format[position++];
			if (char === '{') {
				if (text) {
					tokens.push({type: 'text', value: text});
				}

				text = '';
				var sub = '';
				char = format[position++];
				while (char !== undefined && char !== '}') {
					sub += char;
					char = format[position++];
				}
				var isClosed = char === '}';

				var type = RE_TOKEN_LIST_VALUE.test(sub)
					? 'list'
					: isClosed && RE_TOKEN_NAMED_VALUE.test(sub)
						? 'named'
						: 'unknown';
				tokens.push({value: sub, type: type});
			} else if (char === '%') {
				// when found rails i18n syntax, skip text capture
				if (format[(position)] !== '{') {
					text += char;
				}
			} else {
				text += char;
			}
		}

		text && tokens.push({type: 'text', value: text});

		return tokens
	}

	function compile(tokens, values) {
		var compiled = [];
		var index = 0;

		var mode = Array.isArray(values)
			? 'list'
			: isObject(values)
				? 'named'
				: 'unknown';
		if (mode === 'unknown') {
			return compiled
		}

		while (index < tokens.length) {
			var token = tokens[index];
			switch (token.type) {
				case 'text':
					compiled.push(token.value);
					break
				case 'list':
					compiled.push(values[parseInt(token.value, 10)]);
					break
				case 'named':
					if (mode === 'named') {
						compiled.push((values)[token.value]);
					} else {
						{
							warn(("Type of token '" + (token.type) + "' and format of value '" + mode + "' don't match!"));
						}
					}
					break
				case 'unknown': {
					warn("Detect 'unknown' type of token!");
				}
					break
			}
			index++;
		}

		return compiled
	}

	/*  */

	/**
	 *  Path parser
	 *  - Inspired:
	 *    Vue.js Path parser
	 */

		// actions
	var APPEND = 0;
	var PUSH = 1;
	var INC_SUB_PATH_DEPTH = 2;
	var PUSH_SUB_PATH = 3;

	// states
	var BEFORE_PATH = 0;
	var IN_PATH = 1;
	var BEFORE_IDENT = 2;
	var IN_IDENT = 3;
	var IN_SUB_PATH = 4;
	var IN_SINGLE_QUOTE = 5;
	var IN_DOUBLE_QUOTE = 6;
	var AFTER_PATH = 7;
	var ERROR = 8;

	var pathStateMachine = [];

	pathStateMachine[BEFORE_PATH] = {
		'ws': [BEFORE_PATH],
		'ident': [IN_IDENT, APPEND],
		'[': [IN_SUB_PATH],
		'eof': [AFTER_PATH]
	};

	pathStateMachine[IN_PATH] = {
		'ws': [IN_PATH],
		'.': [BEFORE_IDENT],
		'[': [IN_SUB_PATH],
		'eof': [AFTER_PATH]
	};

	pathStateMachine[BEFORE_IDENT] = {
		'ws': [BEFORE_IDENT],
		'ident': [IN_IDENT, APPEND],
		'0': [IN_IDENT, APPEND],
		'number': [IN_IDENT, APPEND]
	};

	pathStateMachine[IN_IDENT] = {
		'ident': [IN_IDENT, APPEND],
		'0': [IN_IDENT, APPEND],
		'number': [IN_IDENT, APPEND],
		'ws': [IN_PATH, PUSH],
		'.': [BEFORE_IDENT, PUSH],
		'[': [IN_SUB_PATH, PUSH],
		'eof': [AFTER_PATH, PUSH]
	};

	pathStateMachine[IN_SUB_PATH] = {
		"'": [IN_SINGLE_QUOTE, APPEND],
		'"': [IN_DOUBLE_QUOTE, APPEND],
		'[': [IN_SUB_PATH, INC_SUB_PATH_DEPTH],
		']': [IN_PATH, PUSH_SUB_PATH],
		'eof': ERROR,
		'else': [IN_SUB_PATH, APPEND]
	};

	pathStateMachine[IN_SINGLE_QUOTE] = {
		"'": [IN_SUB_PATH, APPEND],
		'eof': ERROR,
		'else': [IN_SINGLE_QUOTE, APPEND]
	};

	pathStateMachine[IN_DOUBLE_QUOTE] = {
		'"': [IN_SUB_PATH, APPEND],
		'eof': ERROR,
		'else': [IN_DOUBLE_QUOTE, APPEND]
	};

	/**
	 * Check if an expression is a literal value.
	 */

	var literalValueRE = /^\s?(?:true|false|-?[\d.]+|'[^']*'|"[^"]*")\s?$/;

	function isLiteral(exp) {
		return literalValueRE.test(exp)
	}

	/**
	 * Strip quotes from a string
	 */

	function stripQuotes(str) {
		var a = str.charCodeAt(0);
		var b = str.charCodeAt(str.length - 1);
		return a === b && (a === 0x22 || a === 0x27)
			? str.slice(1, -1)
			: str
	}

	/**
	 * Determine the type of a character in a keypath.
	 */

	function getPathCharType(ch) {
		if (ch === undefined || ch === null) {
			return 'eof'
		}

		var code = ch.charCodeAt(0);

		switch (code) {
			case 0x5B: // [
			case 0x5D: // ]
			case 0x2E: // .
			case 0x22: // "
			case 0x27: // '
				return ch

			case 0x5F: // _
			case 0x24: // $
			case 0x2D: // -
				return 'ident'

			case 0x09: // Tab
			case 0x0A: // Newline
			case 0x0D: // Return
			case 0xA0:  // No-break space
			case 0xFEFF:  // Byte Order Mark
			case 0x2028:  // Line Separator
			case 0x2029:  // Paragraph Separator
				return 'ws'
		}

		return 'ident'
	}

	/**
	 * Format a subPath, return its plain form if it is
	 * a literal string or number. Otherwise prepend the
	 * dynamic indicator (*).
	 */

	function formatSubPath(path) {
		var trimmed = path.trim();
		// invalid leading 0
		if (path.charAt(0) === '0' && isNaN(path)) {
			return false
		}

		return isLiteral(trimmed) ? stripQuotes(trimmed) : '*' + trimmed
	}

	/**
	 * Parse a string path into an array of segments
	 */

	function parse$1(path) {
		var keys = [];
		var index = -1;
		var mode = BEFORE_PATH;
		var subPathDepth = 0;
		var c;
		var key;
		var newChar;
		var type;
		var transition;
		var action;
		var typeMap;
		var actions = [];

		actions[PUSH] = function () {
			if (key !== undefined) {
				keys.push(key);
				key = undefined;
			}
		};

		actions[APPEND] = function () {
			if (key === undefined) {
				key = newChar;
			} else {
				key += newChar;
			}
		};

		actions[INC_SUB_PATH_DEPTH] = function () {
			actions[APPEND]();
			subPathDepth++;
		};

		actions[PUSH_SUB_PATH] = function () {
			if (subPathDepth > 0) {
				subPathDepth--;
				mode = IN_SUB_PATH;
				actions[APPEND]();
			} else {
				subPathDepth = 0;
				if (key === undefined) {
					return false
				}
				key = formatSubPath(key);
				if (key === false) {
					return false
				} else {
					actions[PUSH]();
				}
			}
		};

		function maybeUnescapeQuote() {
			var nextChar = path[index + 1];
			if ((mode === IN_SINGLE_QUOTE && nextChar === "'") ||
				(mode === IN_DOUBLE_QUOTE && nextChar === '"')) {
				index++;
				newChar = '\\' + nextChar;
				actions[APPEND]();
				return true
			}
		}

		while (mode !== null) {
			index++;
			c = path[index];

			if (c === '\\' && maybeUnescapeQuote()) {
				continue
			}

			type = getPathCharType(c);
			typeMap = pathStateMachine[mode];
			transition = typeMap[type] || typeMap['else'] || ERROR;

			if (transition === ERROR) {
				return // parse error
			}

			mode = transition[0];
			action = actions[transition[1]];
			if (action) {
				newChar = transition[2];
				newChar = newChar === undefined
					? c
					: newChar;
				if (action() === false) {
					return
				}
			}

			if (mode === AFTER_PATH) {
				return keys
			}
		}
	}


	var I18nPath = function I18nPath() {
		this._cache = Object.create(null);
	};

	/**
	 * External parse that check for a cache hit first
	 */
	I18nPath.prototype.parsePath = function parsePath(path) {
		var hit = this._cache[path];
		if (!hit) {
			hit = parse$1(path);
			if (hit) {
				this._cache[path] = hit;
			}
		}
		return hit || []
	};

	/**
	 * Get path value from path string
	 */
	I18nPath.prototype.getPathValue = function getPathValue(obj, path) {
		if (!isObject(obj)) {
			return null
		}

		var paths = this.parsePath(path);
		if (paths.length === 0) {
			return null
		} else {
			var length = paths.length;
			var last = obj;
			var i = 0;
			while (i < length) {
				var value = last[paths[i]];
				if (value === undefined) {
					return null
				}
				last = value;
				i++;
			}

			return last
		}
	};

	/*  */


	var htmlTagMatcher = /<\/?[\w\s="/.':;#-\/]+>/;
	var linkKeyMatcher = /(?:@(?:\.[a-z]+)?:(?:[\w\-_|.]+|\([\w\-_|.]+\)))/g;
	var linkKeyPrefixMatcher = /^@(?:\.([a-z]+))?:/;
	var bracketsMatcher = /[()]/g;
	var defaultModifiers = {
		'upper': function (str) {
			return str.toLocaleUpperCase();
		},
		'lower': function (str) {
			return str.toLocaleLowerCase();
		},
		'capitalize': function (str) {
			return ("" + (str.charAt(0).toLocaleUpperCase()) + (str.substr(1)));
		}
	};

	var defaultFormatter = new BaseFormatter();

	var VueI18n = function VueI18n(options) {
		var this$1 = this;
		if (options === void 0) options = {};

		// Auto install if it is not done yet and `window` has `Vue`.
		// To allow users to avoid auto-installation in some cases,
		// this code should be placed here. See #290
		/* istanbul ignore if */
		if (!Vue && typeof window !== 'undefined' && window.Vue) {
			install(window.Vue);
		}

		var locale = options.locale || 'en-US';
		var fallbackLocale = options.fallbackLocale === false
			? false
			: options.fallbackLocale || 'en-US';
		var messages = options.messages || {};
		var dateTimeFormats = options.dateTimeFormats || {};
		var numberFormats = options.numberFormats || {};

		this._vm = null;
		this._formatter = options.formatter || defaultFormatter;
		this._modifiers = options.modifiers || {};
		this._missing = options.missing || null;
		this._root = options.root || null;
		this._sync = options.sync === undefined ? true : !!options.sync;
		this._fallbackRoot = options.fallbackRoot === undefined
			? true
			: !!options.fallbackRoot;
		this._formatFallbackMessages = options.formatFallbackMessages === undefined
			? false
			: !!options.formatFallbackMessages;
		this._silentTranslationWarn = options.silentTranslationWarn === undefined
			? false
			: options.silentTranslationWarn;
		this._silentFallbackWarn = options.silentFallbackWarn === undefined
			? false
			: !!options.silentFallbackWarn;
		this._dateTimeFormatters = {};
		this._numberFormatters = {};
		this._path = new I18nPath();
		this._dataListeners = [];
		this._componentInstanceCreatedListener = options.componentInstanceCreatedListener || null;
		this._preserveDirectiveContent = options.preserveDirectiveContent === undefined
			? false
			: !!options.preserveDirectiveContent;
		this.pluralizationRules = options.pluralizationRules || {};
		this._warnHtmlInMessage = options.warnHtmlInMessage || 'off';
		this._postTranslation = options.postTranslation || null;

		/**
		 * @param choice {number} a choice index given by the input to $tc: `$tc('path.to.rule', choiceIndex)`
		 * @param choicesLength {number} an overall amount of available choices
		 * @returns a final choice index
		 */
		this.getChoiceIndex = function (choice, choicesLength) {
			var thisPrototype = Object.getPrototypeOf(this$1);
			if (thisPrototype && thisPrototype.getChoiceIndex) {
				var prototypeGetChoiceIndex = (thisPrototype.getChoiceIndex);
				return (prototypeGetChoiceIndex).call(this$1, choice, choicesLength)
			}

			// Default (old) getChoiceIndex implementation - english-compatible
			var defaultImpl = function (_choice, _choicesLength) {
				_choice = Math.abs(_choice);

				if (_choicesLength === 2) {
					return _choice
						? _choice > 1
							? 1
							: 0
						: 1
				}

				return _choice ? Math.min(_choice, 2) : 0
			};

			if (this$1.locale in this$1.pluralizationRules) {
				return this$1.pluralizationRules[this$1.locale].apply(this$1, [choice, choicesLength])
			} else {
				return defaultImpl(choice, choicesLength)
			}
		};


		this._exist = function (message, key) {
			if (!message || !key) {
				return false
			}
			if (!isNull(this$1._path.getPathValue(message, key))) {
				return true
			}
			// fallback for flat key
			if (message[key]) {
				return true
			}
			return false
		};

		if (this._warnHtmlInMessage === 'warn' || this._warnHtmlInMessage === 'error') {
			Object.keys(messages).forEach(function (locale) {
				this$1._checkLocaleMessage(locale, this$1._warnHtmlInMessage, messages[locale]);
			});
		}

		this._initVM({
			locale: locale,
			fallbackLocale: fallbackLocale,
			messages: messages,
			dateTimeFormats: dateTimeFormats,
			numberFormats: numberFormats
		});
	};

	var prototypeAccessors = {
		vm: {configurable: true},
		messages: {configurable: true},
		dateTimeFormats: {configurable: true},
		numberFormats: {configurable: true},
		availableLocales: {configurable: true},
		locale: {configurable: true},
		fallbackLocale: {configurable: true},
		formatFallbackMessages: {configurable: true},
		missing: {configurable: true},
		formatter: {configurable: true},
		silentTranslationWarn: {configurable: true},
		silentFallbackWarn: {configurable: true},
		preserveDirectiveContent: {configurable: true},
		warnHtmlInMessage: {configurable: true},
		postTranslation: {configurable: true}
	};

	VueI18n.prototype._checkLocaleMessage = function _checkLocaleMessage(locale, level, message) {
		var paths = [];

		var fn = function (level, locale, message, paths) {
			if (isPlainObject(message)) {
				Object.keys(message).forEach(function (key) {
					var val = message[key];
					if (isPlainObject(val)) {
						paths.push(key);
						paths.push('.');
						fn(level, locale, val, paths);
						paths.pop();
						paths.pop();
					} else {
						paths.push(key);
						fn(level, locale, val, paths);
						paths.pop();
					}
				});
			} else if (Array.isArray(message)) {
				message.forEach(function (item, index) {
					if (isPlainObject(item)) {
						paths.push(("[" + index + "]"));
						paths.push('.');
						fn(level, locale, item, paths);
						paths.pop();
						paths.pop();
					} else {
						paths.push(("[" + index + "]"));
						fn(level, locale, item, paths);
						paths.pop();
					}
				});
			} else if (isString(message)) {
				var ret = htmlTagMatcher.test(message);
				if (ret) {
					var msg = "Detected HTML in message '" + message + "' of keypath '" + (paths.join('')) + "' at '" + locale + "'. Consider component interpolation with '<i18n>' to avoid XSS. See https://bit.ly/2ZqJzkp";
					if (level === 'warn') {
						warn(msg);
					} else if (level === 'error') {
						error(msg);
					}
				}
			}
		};

		fn(level, locale, message, paths);
	};

	VueI18n.prototype._initVM = function _initVM(data) {
		var silent = Vue.config.silent;
		Vue.config.silent = true;
		this._vm = new Vue({data: data});
		Vue.config.silent = silent;
	};

	VueI18n.prototype.destroyVM = function destroyVM() {
		this._vm.$destroy();
	};

	VueI18n.prototype.subscribeDataChanging = function subscribeDataChanging(vm) {
		this._dataListeners.push(vm);
	};

	VueI18n.prototype.unsubscribeDataChanging = function unsubscribeDataChanging(vm) {
		remove(this._dataListeners, vm);
	};

	VueI18n.prototype.watchI18nData = function watchI18nData() {
		var self = this;
		return this._vm.$watch('$data', function () {
			var i = self._dataListeners.length;
			while (i--) {
				Vue.nextTick(function () {
					self._dataListeners[i] && self._dataListeners[i].$forceUpdate();
				});
			}
		}, {deep: true})
	};

	VueI18n.prototype.watchLocale = function watchLocale() {
		/* istanbul ignore if */
		if (!this._sync || !this._root) {
			return null
		}
		var target = this._vm;
		return this._root.$i18n.vm.$watch('locale', function (val) {
			target.$set(target, 'locale', val);
			target.$forceUpdate();
		}, {immediate: true})
	};

	VueI18n.prototype.onComponentInstanceCreated = function onComponentInstanceCreated(newI18n) {
		if (this._componentInstanceCreatedListener) {
			this._componentInstanceCreatedListener(newI18n, this);
		}
	};

	prototypeAccessors.vm.get = function () {
		return this._vm
	};

	prototypeAccessors.messages.get = function () {
		return looseClone(this._getMessages())
	};
	prototypeAccessors.dateTimeFormats.get = function () {
		return looseClone(this._getDateTimeFormats())
	};
	prototypeAccessors.numberFormats.get = function () {
		return looseClone(this._getNumberFormats())
	};
	prototypeAccessors.availableLocales.get = function () {
		return Object.keys(this.messages).sort()
	};

	prototypeAccessors.locale.get = function () {
		return this._vm.locale
	};
	prototypeAccessors.locale.set = function (locale) {
		this._vm.$set(this._vm, 'locale', locale);
	};

	prototypeAccessors.fallbackLocale.get = function () {
		return this._vm.fallbackLocale
	};
	prototypeAccessors.fallbackLocale.set = function (locale) {
		this._localeChainCache = {};
		this._vm.$set(this._vm, 'fallbackLocale', locale);
	};

	prototypeAccessors.formatFallbackMessages.get = function () {
		return this._formatFallbackMessages
	};
	prototypeAccessors.formatFallbackMessages.set = function (fallback) {
		this._formatFallbackMessages = fallback;
	};

	prototypeAccessors.missing.get = function () {
		return this._missing
	};
	prototypeAccessors.missing.set = function (handler) {
		this._missing = handler;
	};

	prototypeAccessors.formatter.get = function () {
		return this._formatter
	};
	prototypeAccessors.formatter.set = function (formatter) {
		this._formatter = formatter;
	};

	prototypeAccessors.silentTranslationWarn.get = function () {
		return this._silentTranslationWarn
	};
	prototypeAccessors.silentTranslationWarn.set = function (silent) {
		this._silentTranslationWarn = silent;
	};

	prototypeAccessors.silentFallbackWarn.get = function () {
		return this._silentFallbackWarn
	};
	prototypeAccessors.silentFallbackWarn.set = function (silent) {
		this._silentFallbackWarn = silent;
	};

	prototypeAccessors.preserveDirectiveContent.get = function () {
		return this._preserveDirectiveContent
	};
	prototypeAccessors.preserveDirectiveContent.set = function (preserve) {
		this._preserveDirectiveContent = preserve;
	};

	prototypeAccessors.warnHtmlInMessage.get = function () {
		return this._warnHtmlInMessage
	};
	prototypeAccessors.warnHtmlInMessage.set = function (level) {
		var this$1 = this;

		var orgLevel = this._warnHtmlInMessage;
		this._warnHtmlInMessage = level;
		if (orgLevel !== level && (level === 'warn' || level === 'error')) {
			var messages = this._getMessages();
			Object.keys(messages).forEach(function (locale) {
				this$1._checkLocaleMessage(locale, this$1._warnHtmlInMessage, messages[locale]);
			});
		}
	};

	prototypeAccessors.postTranslation.get = function () {
		return this._postTranslation
	};
	prototypeAccessors.postTranslation.set = function (handler) {
		this._postTranslation = handler;
	};

	VueI18n.prototype._getMessages = function _getMessages() {
		return this._vm.messages
	};
	VueI18n.prototype._getDateTimeFormats = function _getDateTimeFormats() {
		return this._vm.dateTimeFormats
	};
	VueI18n.prototype._getNumberFormats = function _getNumberFormats() {
		return this._vm.numberFormats
	};

	VueI18n.prototype._warnDefault = function _warnDefault(locale, key, result, vm, values, interpolateMode) {
		if (!isNull(result)) {
			return result
		}
		if (this._missing) {
			var missingRet = this._missing.apply(null, [locale, key, vm, values]);
			if (isString(missingRet)) {
				return missingRet
			}
		} else {
			if (!this._isSilentTranslationWarn(key)) {
				warn(
					"Cannot translate the value of keypath '" + key + "'. " +
					'Use the value of keypath as default.'
				);
			}
		}

		if (this._formatFallbackMessages) {
			var parsedArgs = parseArgs.apply(void 0, values);
			return this._render(key, interpolateMode, parsedArgs.params, key)
		} else {
			return key
		}
	};

	VueI18n.prototype._isFallbackRoot = function _isFallbackRoot(val) {
		return !val && !isNull(this._root) && this._fallbackRoot
	};

	VueI18n.prototype._isSilentFallbackWarn = function _isSilentFallbackWarn(key) {
		return this._silentFallbackWarn instanceof RegExp
			? this._silentFallbackWarn.test(key)
			: this._silentFallbackWarn
	};

	VueI18n.prototype._isSilentFallback = function _isSilentFallback(locale, key) {
		return this._isSilentFallbackWarn(key) && (this._isFallbackRoot() || locale !== this.fallbackLocale)
	};

	VueI18n.prototype._isSilentTranslationWarn = function _isSilentTranslationWarn(key) {
		return this._silentTranslationWarn instanceof RegExp
			? this._silentTranslationWarn.test(key)
			: this._silentTranslationWarn
	};

	VueI18n.prototype._interpolate = function _interpolate(
		locale,
		message,
		key,
		host,
		interpolateMode,
		values,
		visitedLinkStack
	) {
		if (!message) {
			return null
		}

		var pathRet = this._path.getPathValue(message, key);
		if (Array.isArray(pathRet) || isPlainObject(pathRet)) {
			return pathRet
		}

		var ret;
		if (isNull(pathRet)) {
			/* istanbul ignore else */
			if (isPlainObject(message)) {
				ret = message[key];
				if (!isString(ret)) {
					if (!this._isSilentTranslationWarn(key) && !this._isSilentFallback(locale, key)) {
						warn(("Value of key '" + key + "' is not a string!"));
					}
					return null
				}
			} else {
				return null
			}
		} else {
			/* istanbul ignore else */
			if (isString(pathRet)) {
				ret = pathRet;
			} else {
				if (!this._isSilentTranslationWarn(key) && !this._isSilentFallback(locale, key)) {
					warn(("Value of key '" + key + "' is not a string!"));
				}
				return null
			}
		}

		// Check for the existence of links within the translated string
		if (ret.indexOf('@:') >= 0 || ret.indexOf('@.') >= 0) {
			ret = this._link(locale, message, ret, host, 'raw', values, visitedLinkStack);
		}

		return this._render(ret, interpolateMode, values, key)
	};

	VueI18n.prototype._link = function _link(
		locale,
		message,
		str,
		host,
		interpolateMode,
		values,
		visitedLinkStack
	) {
		var ret = str;

		// Match all the links within the local
		// We are going to replace each of
		// them with its translation
		var matches = ret.match(linkKeyMatcher);
		for (var idx in matches) {
			// ie compatible: filter custom array
			// prototype method
			if (!matches.hasOwnProperty(idx)) {
				continue
			}
			var link = matches[idx];
			var linkKeyPrefixMatches = link.match(linkKeyPrefixMatcher);
			var linkPrefix = linkKeyPrefixMatches[0];
			var formatterName = linkKeyPrefixMatches[1];

			// Remove the leading @:, @.case: and the brackets
			var linkPlaceholder = link.replace(linkPrefix, '').replace(bracketsMatcher, '');

			if (includes(visitedLinkStack, linkPlaceholder)) {
				{
					warn(("Circular reference found. \"" + link + "\" is already visited in the chain of " + (visitedLinkStack.reverse().join(' <- '))));
				}
				return ret
			}
			visitedLinkStack.push(linkPlaceholder);

			// Translate the link
			var translated = this._interpolate(
				locale, message, linkPlaceholder, host,
				interpolateMode === 'raw' ? 'string' : interpolateMode,
				interpolateMode === 'raw' ? undefined : values,
				visitedLinkStack
			);

			if (this._isFallbackRoot(translated)) {
				if (!this._isSilentTranslationWarn(linkPlaceholder)) {
					warn(("Fall back to translate the link placeholder '" + linkPlaceholder + "' with root locale."));
				}
				/* istanbul ignore if */
				if (!this._root) {
					throw Error('unexpected error')
				}
				var root = this._root.$i18n;
				translated = root._translate(
					root._getMessages(), root.locale, root.fallbackLocale,
					linkPlaceholder, host, interpolateMode, values
				);
			}
			translated = this._warnDefault(
				locale, linkPlaceholder, translated, host,
				Array.isArray(values) ? values : [values],
				interpolateMode
			);

			if (this._modifiers.hasOwnProperty(formatterName)) {
				translated = this._modifiers[formatterName](translated);
			} else if (defaultModifiers.hasOwnProperty(formatterName)) {
				translated = defaultModifiers[formatterName](translated);
			}

			visitedLinkStack.pop();

			// Replace the link with the translated
			ret = !translated ? ret : ret.replace(link, translated);
		}

		return ret
	};

	VueI18n.prototype._render = function _render(message, interpolateMode, values, path) {
		var ret = this._formatter.interpolate(message, values, path);

		// If the custom formatter refuses to work - apply the default one
		if (!ret) {
			ret = defaultFormatter.interpolate(message, values, path);
		}

		// if interpolateMode is **not** 'string' ('row'),
		// return the compiled data (e.g. ['foo', VNode, 'bar']) with formatter
		return interpolateMode === 'string' && !isString(ret) ? ret.join('') : ret
	};

	VueI18n.prototype._appendItemToChain = function _appendItemToChain(chain, item, blocks) {
		var follow = false;
		if (!includes(chain, item)) {
			follow = true;
			if (item) {
				follow = item[item.length - 1] !== '!';
				item = item.replace(/!/g, '');
				chain.push(item);
				if (blocks && blocks[item]) {
					follow = blocks[item];
				}
			}
		}
		return follow
	};

	VueI18n.prototype._appendLocaleToChain = function _appendLocaleToChain(chain, locale, blocks) {
		var follow;
		var tokens = locale.split('-');
		do {
			var item = tokens.join('-');
			follow = this._appendItemToChain(chain, item, blocks);
			tokens.splice(-1, 1);
		} while (tokens.length && (follow === true))
		return follow
	};

	VueI18n.prototype._appendBlockToChain = function _appendBlockToChain(chain, block, blocks) {
		var follow = true;
		for (var i = 0; (i < block.length) && (isBoolean(follow)); i++) {
			var locale = block[i];
			if (isString(locale)) {
				follow = this._appendLocaleToChain(chain, locale, blocks);
			}
		}
		return follow
	};

	VueI18n.prototype._getLocaleChain = function _getLocaleChain(start, fallbackLocale) {
		if (start === '') {
			return []
		}

		if (!this._localeChainCache) {
			this._localeChainCache = {};
		}

		var chain = this._localeChainCache[start];
		if (!chain) {
			if (!fallbackLocale) {
				fallbackLocale = this.fallbackLocale;
			}
			chain = [];

			// first block defined by start
			var block = [start];

			// while any intervening block found
			while (isArray(block)) {
				block = this._appendBlockToChain(
					chain,
					block,
					fallbackLocale
				);
			}

			// last block defined by default
			var defaults;
			if (isArray(fallbackLocale)) {
				defaults = fallbackLocale;
			} else if (isObject(fallbackLocale)) {
				/* $FlowFixMe */
				if (fallbackLocale['default']) {
					defaults = fallbackLocale['default'];
				} else {
					defaults = null;
				}
			} else {
				defaults = fallbackLocale;
			}

			// convert defaults to array
			if (isString(defaults)) {
				block = [defaults];
			} else {
				block = defaults;
			}
			if (block) {
				this._appendBlockToChain(
					chain,
					block,
					null
				);
			}
			this._localeChainCache[start] = chain;
		}
		return chain
	};

	VueI18n.prototype._translate = function _translate(
		messages,
		locale,
		fallback,
		key,
		host,
		interpolateMode,
		args
	) {
		var chain = this._getLocaleChain(locale, fallback);
		var res;
		for (var i = 0; i < chain.length; i++) {
			var step = chain[i];
			res =
				this._interpolate(step, messages[step], key, host, interpolateMode, args, [key]);
			if (!isNull(res)) {
				if (step !== locale && "development" !== 'production' && !this._isSilentTranslationWarn(key) && !this._isSilentFallbackWarn(key)) {
					warn(("Fall back to translate the keypath '" + key + "' with '" + step + "' locale."));
				}
				return res
			}
		}
		return null
	};

	VueI18n.prototype._t = function _t(key, _locale, messages, host) {
		var ref;

		var values = [], len = arguments.length - 4;
		while (len-- > 0) values[len] = arguments[len + 4];
		if (!key) {
			return ''
		}

		var parsedArgs = parseArgs.apply(void 0, values);
		var locale = parsedArgs.locale || _locale;

		var ret = this._translate(
			messages, locale, this.fallbackLocale, key,
			host, 'string', parsedArgs.params
		);
		if (this._isFallbackRoot(ret)) {
			if (!this._isSilentTranslationWarn(key) && !this._isSilentFallbackWarn(key)) {
				warn(("Fall back to translate the keypath '" + key + "' with root locale."));
			}
			/* istanbul ignore if */
			if (!this._root) {
				throw Error('unexpected error')
			}
			return (ref = this._root).$t.apply(ref, [key].concat(values))
		} else {
			ret = this._warnDefault(locale, key, ret, host, values, 'string');
			if (this._postTranslation && ret !== null && ret !== undefined) {
				ret = this._postTranslation(ret, key);
			}
			return ret
		}
	};

	VueI18n.prototype.t = function t(key) {
		var ref;

		var values = [], len = arguments.length - 1;
		while (len-- > 0) values[len] = arguments[len + 1];
		return (ref = this)._t.apply(ref, [key, this.locale, this._getMessages(), null].concat(values))
	};

	VueI18n.prototype._i = function _i(key, locale, messages, host, values) {
		var ret =
			this._translate(messages, locale, this.fallbackLocale, key, host, 'raw', values);
		if (this._isFallbackRoot(ret)) {
			if (!this._isSilentTranslationWarn(key)) {
				warn(("Fall back to interpolate the keypath '" + key + "' with root locale."));
			}
			if (!this._root) {
				throw Error('unexpected error')
			}
			return this._root.$i18n.i(key, locale, values)
		} else {
			return this._warnDefault(locale, key, ret, host, [values], 'raw')
		}
	};

	VueI18n.prototype.i = function i(key, locale, values) {
		/* istanbul ignore if */
		if (!key) {
			return ''
		}

		if (!isString(locale)) {
			locale = this.locale;
		}

		return this._i(key, locale, this._getMessages(), null, values)
	};

	VueI18n.prototype._tc = function _tc(
		key,
		_locale,
		messages,
		host,
		choice
	) {
		var ref;

		var values = [], len = arguments.length - 5;
		while (len-- > 0) values[len] = arguments[len + 5];
		if (!key) {
			return ''
		}
		if (choice === undefined) {
			choice = 1;
		}

		var predefined = {'count': choice, 'n': choice};
		var parsedArgs = parseArgs.apply(void 0, values);
		parsedArgs.params = Object.assign(predefined, parsedArgs.params);
		values = parsedArgs.locale === null ? [parsedArgs.params] : [parsedArgs.locale, parsedArgs.params];
		return this.fetchChoice((ref = this)._t.apply(ref, [key, _locale, messages, host].concat(values)), choice)
	};

	VueI18n.prototype.fetchChoice = function fetchChoice(message, choice) {
		/* istanbul ignore if */
		if (!message && !isString(message)) {
			return null
		}
		var choices = message.split('|');

		choice = this.getChoiceIndex(choice, choices.length);
		if (!choices[choice]) {
			return message
		}
		return choices[choice].trim()
	};

	VueI18n.prototype.tc = function tc(key, choice) {
		var ref;

		var values = [], len = arguments.length - 2;
		while (len-- > 0) values[len] = arguments[len + 2];
		return (ref = this)._tc.apply(ref, [key, this.locale, this._getMessages(), null, choice].concat(values))
	};

	VueI18n.prototype._te = function _te(key, locale, messages) {
		var args = [], len = arguments.length - 3;
		while (len-- > 0) args[len] = arguments[len + 3];

		var _locale = parseArgs.apply(void 0, args).locale || locale;
		return this._exist(messages[_locale], key)
	};

	VueI18n.prototype.te = function te(key, locale) {
		return this._te(key, this.locale, this._getMessages(), locale)
	};

	VueI18n.prototype.getLocaleMessage = function getLocaleMessage(locale) {
		return looseClone(this._vm.messages[locale] || {})
	};

	VueI18n.prototype.setLocaleMessage = function setLocaleMessage(locale, message) {
		if (this._warnHtmlInMessage === 'warn' || this._warnHtmlInMessage === 'error') {
			this._checkLocaleMessage(locale, this._warnHtmlInMessage, message);
		}
		this._vm.$set(this._vm.messages, locale, message);
	};

	VueI18n.prototype.mergeLocaleMessage = function mergeLocaleMessage(locale, message) {
		if (this._warnHtmlInMessage === 'warn' || this._warnHtmlInMessage === 'error') {
			this._checkLocaleMessage(locale, this._warnHtmlInMessage, message);
		}
		this._vm.$set(this._vm.messages, locale, merge({}, this._vm.messages[locale] || {}, message));
	};

	VueI18n.prototype.getDateTimeFormat = function getDateTimeFormat(locale) {
		return looseClone(this._vm.dateTimeFormats[locale] || {})
	};

	VueI18n.prototype.setDateTimeFormat = function setDateTimeFormat(locale, format) {
		this._vm.$set(this._vm.dateTimeFormats, locale, format);
		this._clearDateTimeFormat(locale, format);
	};

	VueI18n.prototype.mergeDateTimeFormat = function mergeDateTimeFormat(locale, format) {
		this._vm.$set(this._vm.dateTimeFormats, locale, merge(this._vm.dateTimeFormats[locale] || {}, format));
		this._clearDateTimeFormat(locale, format);
	};

	VueI18n.prototype._clearDateTimeFormat = function _clearDateTimeFormat(locale, format) {
		for (var key in format) {
			var id = locale + "__" + key;

			if (!this._dateTimeFormatters.hasOwnProperty(id)) {
				continue
			}

			delete this._dateTimeFormatters[id];
		}
	};

	VueI18n.prototype._localizeDateTime = function _localizeDateTime(
		value,
		locale,
		fallback,
		dateTimeFormats,
		key
	) {
		var _locale = locale;
		var formats = dateTimeFormats[_locale];

		var chain = this._getLocaleChain(locale, fallback);
		for (var i = 0; i < chain.length; i++) {
			var current = _locale;
			var step = chain[i];
			formats = dateTimeFormats[step];
			_locale = step;
			// fallback locale
			if (isNull(formats) || isNull(formats[key])) {
				if (step !== locale && "development" !== 'production' && !this._isSilentTranslationWarn(key) && !this._isSilentFallbackWarn(key)) {
					warn(("Fall back to '" + step + "' datetime formats from '" + current + "' datetime formats."));
				}
			} else {
				break
			}
		}

		if (isNull(formats) || isNull(formats[key])) {
			return null
		} else {
			var format = formats[key];
			var id = _locale + "__" + key;
			var formatter = this._dateTimeFormatters[id];
			if (!formatter) {
				formatter = this._dateTimeFormatters[id] = new Intl.DateTimeFormat(_locale, format);
			}
			return formatter.format(value)
		}
	};

	VueI18n.prototype._d = function _d(value, locale, key) {
		/* istanbul ignore if */
		if (!VueI18n.availabilities.dateTimeFormat) {
			warn('Cannot format a Date value due to not supported Intl.DateTimeFormat.');
			return ''
		}

		if (!key) {
			return new Intl.DateTimeFormat(locale).format(value)
		}

		var ret =
			this._localizeDateTime(value, locale, this.fallbackLocale, this._getDateTimeFormats(), key);
		if (this._isFallbackRoot(ret)) {
			if (!this._isSilentTranslationWarn(key) && !this._isSilentFallbackWarn(key)) {
				warn(("Fall back to datetime localization of root: key '" + key + "'."));
			}
			/* istanbul ignore if */
			if (!this._root) {
				throw Error('unexpected error')
			}
			return this._root.$i18n.d(value, key, locale)
		} else {
			return ret || ''
		}
	};

	VueI18n.prototype.d = function d(value) {
		var args = [], len = arguments.length - 1;
		while (len-- > 0) args[len] = arguments[len + 1];

		var locale = this.locale;
		var key = null;

		if (args.length === 1) {
			if (isString(args[0])) {
				key = args[0];
			} else if (isObject(args[0])) {
				if (args[0].locale) {
					locale = args[0].locale;
				}
				if (args[0].key) {
					key = args[0].key;
				}
			}
		} else if (args.length === 2) {
			if (isString(args[0])) {
				key = args[0];
			}
			if (isString(args[1])) {
				locale = args[1];
			}
		}

		return this._d(value, locale, key)
	};

	VueI18n.prototype.getNumberFormat = function getNumberFormat(locale) {
		return looseClone(this._vm.numberFormats[locale] || {})
	};

	VueI18n.prototype.setNumberFormat = function setNumberFormat(locale, format) {
		this._vm.$set(this._vm.numberFormats, locale, format);
		this._clearNumberFormat(locale, format);
	};

	VueI18n.prototype.mergeNumberFormat = function mergeNumberFormat(locale, format) {
		this._vm.$set(this._vm.numberFormats, locale, merge(this._vm.numberFormats[locale] || {}, format));
		this._clearNumberFormat(locale, format);
	};

	VueI18n.prototype._clearNumberFormat = function _clearNumberFormat(locale, format) {
		for (var key in format) {
			var id = locale + "__" + key;

			if (!this._numberFormatters.hasOwnProperty(id)) {
				continue
			}

			delete this._numberFormatters[id];
		}
	};

	VueI18n.prototype._getNumberFormatter = function _getNumberFormatter(
		value,
		locale,
		fallback,
		numberFormats,
		key,
		options
	) {
		var _locale = locale;
		var formats = numberFormats[_locale];

		var chain = this._getLocaleChain(locale, fallback);
		for (var i = 0; i < chain.length; i++) {
			var current = _locale;
			var step = chain[i];
			formats = numberFormats[step];
			_locale = step;
			// fallback locale
			if (isNull(formats) || isNull(formats[key])) {
				if (step !== locale && "development" !== 'production' && !this._isSilentTranslationWarn(key) && !this._isSilentFallbackWarn(key)) {
					warn(("Fall back to '" + step + "' number formats from '" + current + "' number formats."));
				}
			} else {
				break
			}
		}

		if (isNull(formats) || isNull(formats[key])) {
			return null
		} else {
			var format = formats[key];

			var formatter;
			if (options) {
				// If options specified - create one time number formatter
				formatter = new Intl.NumberFormat(_locale, Object.assign({}, format, options));
			} else {
				var id = _locale + "__" + key;
				formatter = this._numberFormatters[id];
				if (!formatter) {
					formatter = this._numberFormatters[id] = new Intl.NumberFormat(_locale, format);
				}
			}
			return formatter
		}
	};

	VueI18n.prototype._n = function _n(value, locale, key, options) {
		/* istanbul ignore if */
		if (!VueI18n.availabilities.numberFormat) {
			{
				warn('Cannot format a Number value due to not supported Intl.NumberFormat.');
			}
			return ''
		}

		if (!key) {
			var nf = !options ? new Intl.NumberFormat(locale) : new Intl.NumberFormat(locale, options);
			return nf.format(value)
		}

		var formatter = this._getNumberFormatter(value, locale, this.fallbackLocale, this._getNumberFormats(), key, options);
		var ret = formatter && formatter.format(value);
		if (this._isFallbackRoot(ret)) {
			if (!this._isSilentTranslationWarn(key) && !this._isSilentFallbackWarn(key)) {
				warn(("Fall back to number localization of root: key '" + key + "'."));
			}
			/* istanbul ignore if */
			if (!this._root) {
				throw Error('unexpected error')
			}
			return this._root.$i18n.n(value, Object.assign({}, {key: key, locale: locale}, options))
		} else {
			return ret || ''
		}
	};

	VueI18n.prototype.n = function n(value) {
		var args = [], len = arguments.length - 1;
		while (len-- > 0) args[len] = arguments[len + 1];

		var locale = this.locale;
		var key = null;
		var options = null;

		if (args.length === 1) {
			if (isString(args[0])) {
				key = args[0];
			} else if (isObject(args[0])) {
				if (args[0].locale) {
					locale = args[0].locale;
				}
				if (args[0].key) {
					key = args[0].key;
				}

				// Filter out number format options only
				options = Object.keys(args[0]).reduce(function (acc, key) {
					var obj;

					if (includes(numberFormatKeys, key)) {
						return Object.assign({}, acc, (obj = {}, obj[key] = args[0][key], obj))
					}
					return acc
				}, null);
			}
		} else if (args.length === 2) {
			if (isString(args[0])) {
				key = args[0];
			}
			if (isString(args[1])) {
				locale = args[1];
			}
		}

		return this._n(value, locale, key, options)
	};

	VueI18n.prototype._ntp = function _ntp(value, locale, key, options) {
		/* istanbul ignore if */
		if (!VueI18n.availabilities.numberFormat) {
			{
				warn('Cannot format to parts a Number value due to not supported Intl.NumberFormat.');
			}
			return []
		}

		if (!key) {
			var nf = !options ? new Intl.NumberFormat(locale) : new Intl.NumberFormat(locale, options);
			return nf.formatToParts(value)
		}

		var formatter = this._getNumberFormatter(value, locale, this.fallbackLocale, this._getNumberFormats(), key, options);
		var ret = formatter && formatter.formatToParts(value);
		if (this._isFallbackRoot(ret)) {
			if (!this._isSilentTranslationWarn(key)) {
				warn(("Fall back to format number to parts of root: key '" + key + "' ."));
			}
			/* istanbul ignore if */
			if (!this._root) {
				throw Error('unexpected error')
			}
			return this._root.$i18n._ntp(value, locale, key, options)
		} else {
			return ret || []
		}
	};

	Object.defineProperties(VueI18n.prototype, prototypeAccessors);

	var availabilities;
	// $FlowFixMe
	Object.defineProperty(VueI18n, 'availabilities', {
		get: function get() {
			if (!availabilities) {
				var intlDefined = typeof Intl !== 'undefined';
				availabilities = {
					dateTimeFormat: intlDefined && typeof Intl.DateTimeFormat !== 'undefined',
					numberFormat: intlDefined && typeof Intl.NumberFormat !== 'undefined'
				};
			}

			return availabilities
		}
	});

	VueI18n.install = install;
	VueI18n.version = '8.18.2';

	return VueI18n;

})));