748 lines
24 KiB
JavaScript
748 lines
24 KiB
JavaScript
/**
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* Copyright (c) 2014-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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var runtime = (function (exports) {
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"use strict";
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var Op = Object.prototype;
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var hasOwn = Op.hasOwnProperty;
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var undefined; // More compressible than void 0.
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var $Symbol = typeof Symbol === "function" ? Symbol : {};
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var iteratorSymbol = $Symbol.iterator || "@@iterator";
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var asyncIteratorSymbol = $Symbol.asyncIterator || "@@asyncIterator";
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var toStringTagSymbol = $Symbol.toStringTag || "@@toStringTag";
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function define(obj, key, value) {
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Object.defineProperty(obj, key, {
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value: value,
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enumerable: true,
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configurable: true,
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writable: true
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});
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return obj[key];
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}
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try {
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// IE 8 has a broken Object.defineProperty that only works on DOM objects.
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define({}, "");
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} catch (err) {
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define = function(obj, key, value) {
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return obj[key] = value;
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};
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}
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function wrap(innerFn, outerFn, self, tryLocsList) {
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// If outerFn provided and outerFn.prototype is a Generator, then outerFn.prototype instanceof Generator.
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var protoGenerator = outerFn && outerFn.prototype instanceof Generator ? outerFn : Generator;
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var generator = Object.create(protoGenerator.prototype);
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var context = new Context(tryLocsList || []);
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// The ._invoke method unifies the implementations of the .next,
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// .throw, and .return methods.
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generator._invoke = makeInvokeMethod(innerFn, self, context);
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return generator;
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}
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exports.wrap = wrap;
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// Try/catch helper to minimize deoptimizations. Returns a completion
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// record like context.tryEntries[i].completion. This interface could
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// have been (and was previously) designed to take a closure to be
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// invoked without arguments, but in all the cases we care about we
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// already have an existing method we want to call, so there's no need
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// to create a new function object. We can even get away with assuming
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// the method takes exactly one argument, since that happens to be true
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// in every case, so we don't have to touch the arguments object. The
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// only additional allocation required is the completion record, which
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// has a stable shape and so hopefully should be cheap to allocate.
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function tryCatch(fn, obj, arg) {
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try {
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return { type: "normal", arg: fn.call(obj, arg) };
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} catch (err) {
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return { type: "throw", arg: err };
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}
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}
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var GenStateSuspendedStart = "suspendedStart";
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var GenStateSuspendedYield = "suspendedYield";
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var GenStateExecuting = "executing";
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var GenStateCompleted = "completed";
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// Returning this object from the innerFn has the same effect as
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// breaking out of the dispatch switch statement.
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var ContinueSentinel = {};
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// Dummy constructor functions that we use as the .constructor and
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// .constructor.prototype properties for functions that return Generator
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// objects. For full spec compliance, you may wish to configure your
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// minifier not to mangle the names of these two functions.
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function Generator() {}
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function GeneratorFunction() {}
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function GeneratorFunctionPrototype() {}
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// This is a polyfill for %IteratorPrototype% for environments that
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// don't natively support it.
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var IteratorPrototype = {};
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IteratorPrototype[iteratorSymbol] = function () {
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return this;
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};
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var getProto = Object.getPrototypeOf;
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var NativeIteratorPrototype = getProto && getProto(getProto(values([])));
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if (NativeIteratorPrototype &&
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NativeIteratorPrototype !== Op &&
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hasOwn.call(NativeIteratorPrototype, iteratorSymbol)) {
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// This environment has a native %IteratorPrototype%; use it instead
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// of the polyfill.
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IteratorPrototype = NativeIteratorPrototype;
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}
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var Gp = GeneratorFunctionPrototype.prototype =
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Generator.prototype = Object.create(IteratorPrototype);
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GeneratorFunction.prototype = Gp.constructor = GeneratorFunctionPrototype;
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GeneratorFunctionPrototype.constructor = GeneratorFunction;
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GeneratorFunction.displayName = define(
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GeneratorFunctionPrototype,
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toStringTagSymbol,
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"GeneratorFunction"
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);
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// Helper for defining the .next, .throw, and .return methods of the
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// Iterator interface in terms of a single ._invoke method.
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function defineIteratorMethods(prototype) {
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["next", "throw", "return"].forEach(function(method) {
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define(prototype, method, function(arg) {
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return this._invoke(method, arg);
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});
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});
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}
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exports.isGeneratorFunction = function(genFun) {
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var ctor = typeof genFun === "function" && genFun.constructor;
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return ctor
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? ctor === GeneratorFunction ||
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// For the native GeneratorFunction constructor, the best we can
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// do is to check its .name property.
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(ctor.displayName || ctor.name) === "GeneratorFunction"
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: false;
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};
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exports.mark = function(genFun) {
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if (Object.setPrototypeOf) {
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Object.setPrototypeOf(genFun, GeneratorFunctionPrototype);
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} else {
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genFun.__proto__ = GeneratorFunctionPrototype;
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define(genFun, toStringTagSymbol, "GeneratorFunction");
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}
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genFun.prototype = Object.create(Gp);
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return genFun;
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};
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// Within the body of any async function, `await x` is transformed to
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// `yield regeneratorRuntime.awrap(x)`, so that the runtime can test
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// `hasOwn.call(value, "__await")` to determine if the yielded value is
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// meant to be awaited.
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exports.awrap = function(arg) {
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return { __await: arg };
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};
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function AsyncIterator(generator, PromiseImpl) {
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function invoke(method, arg, resolve, reject) {
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var record = tryCatch(generator[method], generator, arg);
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if (record.type === "throw") {
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reject(record.arg);
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} else {
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var result = record.arg;
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var value = result.value;
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if (value &&
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typeof value === "object" &&
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hasOwn.call(value, "__await")) {
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return PromiseImpl.resolve(value.__await).then(function(value) {
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invoke("next", value, resolve, reject);
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}, function(err) {
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invoke("throw", err, resolve, reject);
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});
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}
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return PromiseImpl.resolve(value).then(function(unwrapped) {
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// When a yielded Promise is resolved, its final value becomes
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// the .value of the Promise<{value,done}> result for the
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// current iteration.
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result.value = unwrapped;
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resolve(result);
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}, function(error) {
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// If a rejected Promise was yielded, throw the rejection back
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// into the async generator function so it can be handled there.
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return invoke("throw", error, resolve, reject);
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});
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}
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}
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var previousPromise;
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function enqueue(method, arg) {
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function callInvokeWithMethodAndArg() {
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return new PromiseImpl(function(resolve, reject) {
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invoke(method, arg, resolve, reject);
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});
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}
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return previousPromise =
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// If enqueue has been called before, then we want to wait until
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// all previous Promises have been resolved before calling invoke,
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// so that results are always delivered in the correct order. If
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// enqueue has not been called before, then it is important to
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// call invoke immediately, without waiting on a callback to fire,
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// so that the async generator function has the opportunity to do
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// any necessary setup in a predictable way. This predictability
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// is why the Promise constructor synchronously invokes its
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// executor callback, and why async functions synchronously
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// execute code before the first await. Since we implement simple
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// async functions in terms of async generators, it is especially
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// important to get this right, even though it requires care.
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previousPromise ? previousPromise.then(
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callInvokeWithMethodAndArg,
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// Avoid propagating failures to Promises returned by later
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// invocations of the iterator.
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callInvokeWithMethodAndArg
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) : callInvokeWithMethodAndArg();
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}
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// Define the unified helper method that is used to implement .next,
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// .throw, and .return (see defineIteratorMethods).
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this._invoke = enqueue;
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}
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defineIteratorMethods(AsyncIterator.prototype);
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AsyncIterator.prototype[asyncIteratorSymbol] = function () {
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return this;
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};
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exports.AsyncIterator = AsyncIterator;
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// Note that simple async functions are implemented on top of
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// AsyncIterator objects; they just return a Promise for the value of
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// the final result produced by the iterator.
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exports.async = function(innerFn, outerFn, self, tryLocsList, PromiseImpl) {
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if (PromiseImpl === void 0) PromiseImpl = Promise;
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var iter = new AsyncIterator(
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wrap(innerFn, outerFn, self, tryLocsList),
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PromiseImpl
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);
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return exports.isGeneratorFunction(outerFn)
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? iter // If outerFn is a generator, return the full iterator.
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: iter.next().then(function(result) {
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return result.done ? result.value : iter.next();
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});
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};
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function makeInvokeMethod(innerFn, self, context) {
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var state = GenStateSuspendedStart;
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return function invoke(method, arg) {
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if (state === GenStateExecuting) {
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throw new Error("Generator is already running");
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}
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if (state === GenStateCompleted) {
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if (method === "throw") {
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throw arg;
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}
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// Be forgiving, per 25.3.3.3.3 of the spec:
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// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-generatorresume
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return doneResult();
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}
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context.method = method;
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context.arg = arg;
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while (true) {
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var delegate = context.delegate;
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if (delegate) {
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var delegateResult = maybeInvokeDelegate(delegate, context);
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if (delegateResult) {
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if (delegateResult === ContinueSentinel) continue;
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return delegateResult;
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}
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}
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if (context.method === "next") {
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// Setting context._sent for legacy support of Babel's
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// function.sent implementation.
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context.sent = context._sent = context.arg;
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} else if (context.method === "throw") {
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if (state === GenStateSuspendedStart) {
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state = GenStateCompleted;
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throw context.arg;
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}
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context.dispatchException(context.arg);
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} else if (context.method === "return") {
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context.abrupt("return", context.arg);
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}
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state = GenStateExecuting;
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var record = tryCatch(innerFn, self, context);
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if (record.type === "normal") {
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// If an exception is thrown from innerFn, we leave state ===
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// GenStateExecuting and loop back for another invocation.
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state = context.done
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? GenStateCompleted
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: GenStateSuspendedYield;
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if (record.arg === ContinueSentinel) {
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continue;
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}
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return {
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value: record.arg,
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done: context.done
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};
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} else if (record.type === "throw") {
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state = GenStateCompleted;
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// Dispatch the exception by looping back around to the
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// context.dispatchException(context.arg) call above.
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context.method = "throw";
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context.arg = record.arg;
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}
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}
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};
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}
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// Call delegate.iterator[context.method](context.arg) and handle the
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// result, either by returning a { value, done } result from the
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// delegate iterator, or by modifying context.method and context.arg,
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// setting context.delegate to null, and returning the ContinueSentinel.
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function maybeInvokeDelegate(delegate, context) {
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var method = delegate.iterator[context.method];
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if (method === undefined) {
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// A .throw or .return when the delegate iterator has no .throw
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// method always terminates the yield* loop.
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context.delegate = null;
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if (context.method === "throw") {
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// Note: ["return"] must be used for ES3 parsing compatibility.
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if (delegate.iterator["return"]) {
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// If the delegate iterator has a return method, give it a
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// chance to clean up.
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context.method = "return";
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context.arg = undefined;
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maybeInvokeDelegate(delegate, context);
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if (context.method === "throw") {
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// If maybeInvokeDelegate(context) changed context.method from
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// "return" to "throw", let that override the TypeError below.
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return ContinueSentinel;
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}
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}
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context.method = "throw";
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context.arg = new TypeError(
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"The iterator does not provide a 'throw' method");
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}
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return ContinueSentinel;
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}
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var record = tryCatch(method, delegate.iterator, context.arg);
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if (record.type === "throw") {
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context.method = "throw";
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context.arg = record.arg;
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context.delegate = null;
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return ContinueSentinel;
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}
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var info = record.arg;
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if (! info) {
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context.method = "throw";
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context.arg = new TypeError("iterator result is not an object");
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context.delegate = null;
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return ContinueSentinel;
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}
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if (info.done) {
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// Assign the result of the finished delegate to the temporary
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// variable specified by delegate.resultName (see delegateYield).
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context[delegate.resultName] = info.value;
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// Resume execution at the desired location (see delegateYield).
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context.next = delegate.nextLoc;
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// If context.method was "throw" but the delegate handled the
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// exception, let the outer generator proceed normally. If
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// context.method was "next", forget context.arg since it has been
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// "consumed" by the delegate iterator. If context.method was
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// "return", allow the original .return call to continue in the
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// outer generator.
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if (context.method !== "return") {
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context.method = "next";
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context.arg = undefined;
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}
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} else {
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// Re-yield the result returned by the delegate method.
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return info;
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}
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// The delegate iterator is finished, so forget it and continue with
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// the outer generator.
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context.delegate = null;
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return ContinueSentinel;
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}
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// Define Generator.prototype.{next,throw,return} in terms of the
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// unified ._invoke helper method.
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defineIteratorMethods(Gp);
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define(Gp, toStringTagSymbol, "Generator");
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// A Generator should always return itself as the iterator object when the
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// @@iterator function is called on it. Some browsers' implementations of the
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// iterator prototype chain incorrectly implement this, causing the Generator
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// object to not be returned from this call. This ensures that doesn't happen.
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// See https://github.com/facebook/regenerator/issues/274 for more details.
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Gp[iteratorSymbol] = function() {
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return this;
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};
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Gp.toString = function() {
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return "[object Generator]";
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};
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function pushTryEntry(locs) {
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var entry = { tryLoc: locs[0] };
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if (1 in locs) {
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entry.catchLoc = locs[1];
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}
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if (2 in locs) {
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entry.finallyLoc = locs[2];
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entry.afterLoc = locs[3];
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}
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this.tryEntries.push(entry);
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}
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function resetTryEntry(entry) {
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var record = entry.completion || {};
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record.type = "normal";
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delete record.arg;
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entry.completion = record;
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}
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function Context(tryLocsList) {
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// The root entry object (effectively a try statement without a catch
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// or a finally block) gives us a place to store values thrown from
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// locations where there is no enclosing try statement.
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this.tryEntries = [{ tryLoc: "root" }];
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tryLocsList.forEach(pushTryEntry, this);
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this.reset(true);
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}
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exports.keys = function(object) {
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var keys = [];
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for (var key in object) {
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keys.push(key);
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}
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keys.reverse();
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// Rather than returning an object with a next method, we keep
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// things simple and return the next function itself.
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return function next() {
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while (keys.length) {
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var key = keys.pop();
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if (key in object) {
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next.value = key;
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next.done = false;
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return next;
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}
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}
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// To avoid creating an additional object, we just hang the .value
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// and .done properties off the next function object itself. This
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// also ensures that the minifier will not anonymize the function.
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next.done = true;
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return next;
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};
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};
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function values(iterable) {
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if (iterable) {
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var iteratorMethod = iterable[iteratorSymbol];
|
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if (iteratorMethod) {
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return iteratorMethod.call(iterable);
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}
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|
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if (typeof iterable.next === "function") {
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return iterable;
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}
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if (!isNaN(iterable.length)) {
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var i = -1, next = function next() {
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while (++i < iterable.length) {
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if (hasOwn.call(iterable, i)) {
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next.value = iterable[i];
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next.done = false;
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return next;
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}
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}
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next.value = undefined;
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next.done = true;
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return next;
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};
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return next.next = next;
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}
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}
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|
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// Return an iterator with no values.
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return { next: doneResult };
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}
|
|
exports.values = values;
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|
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function doneResult() {
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return { value: undefined, done: true };
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}
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|
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Context.prototype = {
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constructor: Context,
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|
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reset: function(skipTempReset) {
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this.prev = 0;
|
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this.next = 0;
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|
// Resetting context._sent for legacy support of Babel's
|
|
// function.sent implementation.
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|
this.sent = this._sent = undefined;
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this.done = false;
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this.delegate = null;
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|
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this.method = "next";
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this.arg = undefined;
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this.tryEntries.forEach(resetTryEntry);
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if (!skipTempReset) {
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for (var name in this) {
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|
// Not sure about the optimal order of these conditions:
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|
if (name.charAt(0) === "t" &&
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hasOwn.call(this, name) &&
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!isNaN(+name.slice(1))) {
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this[name] = undefined;
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}
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}
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}
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},
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stop: function() {
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this.done = true;
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var rootEntry = this.tryEntries[0];
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var rootRecord = rootEntry.completion;
|
|
if (rootRecord.type === "throw") {
|
|
throw rootRecord.arg;
|
|
}
|
|
|
|
return this.rval;
|
|
},
|
|
|
|
dispatchException: function(exception) {
|
|
if (this.done) {
|
|
throw exception;
|
|
}
|
|
|
|
var context = this;
|
|
function handle(loc, caught) {
|
|
record.type = "throw";
|
|
record.arg = exception;
|
|
context.next = loc;
|
|
|
|
if (caught) {
|
|
// If the dispatched exception was caught by a catch block,
|
|
// then let that catch block handle the exception normally.
|
|
context.method = "next";
|
|
context.arg = undefined;
|
|
}
|
|
|
|
return !! caught;
|
|
}
|
|
|
|
for (var i = this.tryEntries.length - 1; i >= 0; --i) {
|
|
var entry = this.tryEntries[i];
|
|
var record = entry.completion;
|
|
|
|
if (entry.tryLoc === "root") {
|
|
// Exception thrown outside of any try block that could handle
|
|
// it, so set the completion value of the entire function to
|
|
// throw the exception.
|
|
return handle("end");
|
|
}
|
|
|
|
if (entry.tryLoc <= this.prev) {
|
|
var hasCatch = hasOwn.call(entry, "catchLoc");
|
|
var hasFinally = hasOwn.call(entry, "finallyLoc");
|
|
|
|
if (hasCatch && hasFinally) {
|
|
if (this.prev < entry.catchLoc) {
|
|
return handle(entry.catchLoc, true);
|
|
} else if (this.prev < entry.finallyLoc) {
|
|
return handle(entry.finallyLoc);
|
|
}
|
|
|
|
} else if (hasCatch) {
|
|
if (this.prev < entry.catchLoc) {
|
|
return handle(entry.catchLoc, true);
|
|
}
|
|
|
|
} else if (hasFinally) {
|
|
if (this.prev < entry.finallyLoc) {
|
|
return handle(entry.finallyLoc);
|
|
}
|
|
|
|
} else {
|
|
throw new Error("try statement without catch or finally");
|
|
}
|
|
}
|
|
}
|
|
},
|
|
|
|
abrupt: function(type, arg) {
|
|
for (var i = this.tryEntries.length - 1; i >= 0; --i) {
|
|
var entry = this.tryEntries[i];
|
|
if (entry.tryLoc <= this.prev &&
|
|
hasOwn.call(entry, "finallyLoc") &&
|
|
this.prev < entry.finallyLoc) {
|
|
var finallyEntry = entry;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (finallyEntry &&
|
|
(type === "break" ||
|
|
type === "continue") &&
|
|
finallyEntry.tryLoc <= arg &&
|
|
arg <= finallyEntry.finallyLoc) {
|
|
// Ignore the finally entry if control is not jumping to a
|
|
// location outside the try/catch block.
|
|
finallyEntry = null;
|
|
}
|
|
|
|
var record = finallyEntry ? finallyEntry.completion : {};
|
|
record.type = type;
|
|
record.arg = arg;
|
|
|
|
if (finallyEntry) {
|
|
this.method = "next";
|
|
this.next = finallyEntry.finallyLoc;
|
|
return ContinueSentinel;
|
|
}
|
|
|
|
return this.complete(record);
|
|
},
|
|
|
|
complete: function(record, afterLoc) {
|
|
if (record.type === "throw") {
|
|
throw record.arg;
|
|
}
|
|
|
|
if (record.type === "break" ||
|
|
record.type === "continue") {
|
|
this.next = record.arg;
|
|
} else if (record.type === "return") {
|
|
this.rval = this.arg = record.arg;
|
|
this.method = "return";
|
|
this.next = "end";
|
|
} else if (record.type === "normal" && afterLoc) {
|
|
this.next = afterLoc;
|
|
}
|
|
|
|
return ContinueSentinel;
|
|
},
|
|
|
|
finish: function(finallyLoc) {
|
|
for (var i = this.tryEntries.length - 1; i >= 0; --i) {
|
|
var entry = this.tryEntries[i];
|
|
if (entry.finallyLoc === finallyLoc) {
|
|
this.complete(entry.completion, entry.afterLoc);
|
|
resetTryEntry(entry);
|
|
return ContinueSentinel;
|
|
}
|
|
}
|
|
},
|
|
|
|
"catch": function(tryLoc) {
|
|
for (var i = this.tryEntries.length - 1; i >= 0; --i) {
|
|
var entry = this.tryEntries[i];
|
|
if (entry.tryLoc === tryLoc) {
|
|
var record = entry.completion;
|
|
if (record.type === "throw") {
|
|
var thrown = record.arg;
|
|
resetTryEntry(entry);
|
|
}
|
|
return thrown;
|
|
}
|
|
}
|
|
|
|
// The context.catch method must only be called with a location
|
|
// argument that corresponds to a known catch block.
|
|
throw new Error("illegal catch attempt");
|
|
},
|
|
|
|
delegateYield: function(iterable, resultName, nextLoc) {
|
|
this.delegate = {
|
|
iterator: values(iterable),
|
|
resultName: resultName,
|
|
nextLoc: nextLoc
|
|
};
|
|
|
|
if (this.method === "next") {
|
|
// Deliberately forget the last sent value so that we don't
|
|
// accidentally pass it on to the delegate.
|
|
this.arg = undefined;
|
|
}
|
|
|
|
return ContinueSentinel;
|
|
}
|
|
};
|
|
|
|
// Regardless of whether this script is executing as a CommonJS module
|
|
// or not, return the runtime object so that we can declare the variable
|
|
// regeneratorRuntime in the outer scope, which allows this module to be
|
|
// injected easily by `bin/regenerator --include-runtime script.js`.
|
|
return exports;
|
|
|
|
}(
|
|
// If this script is executing as a CommonJS module, use module.exports
|
|
// as the regeneratorRuntime namespace. Otherwise create a new empty
|
|
// object. Either way, the resulting object will be used to initialize
|
|
// the regeneratorRuntime variable at the top of this file.
|
|
typeof module === "object" ? module.exports : {}
|
|
));
|
|
|
|
try {
|
|
regeneratorRuntime = runtime;
|
|
} catch (accidentalStrictMode) {
|
|
// This module should not be running in strict mode, so the above
|
|
// assignment should always work unless something is misconfigured. Just
|
|
// in case runtime.js accidentally runs in strict mode, we can escape
|
|
// strict mode using a global Function call. This could conceivably fail
|
|
// if a Content Security Policy forbids using Function, but in that case
|
|
// the proper solution is to fix the accidental strict mode problem. If
|
|
// you've misconfigured your bundler to force strict mode and applied a
|
|
// CSP to forbid Function, and you're not willing to fix either of those
|
|
// problems, please detail your unique predicament in a GitHub issue.
|
|
Function("r", "regeneratorRuntime = r")(runtime);
|
|
}
|