Remove global existence check
This commit is contained in:
Brent Burgoyne
@@ -8,7 +8,447 @@
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* the same directory.
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*/
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if (typeof global.regeneratorRuntime !== "object") {
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require('./_runtime')
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var iteratorSymbol = typeof Symbol === "function" && Symbol.iterator || "@@iterator";
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var runtime = global.regeneratorRuntime = exports;
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var hasOwn = Object.prototype.hasOwnProperty;
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var wrap = runtime.wrap = function wrap(innerFn, outerFn, self, tryList) {
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return new Generator(innerFn, outerFn, self || null, tryList || []);
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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 that we use as the .constructor property for
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// functions that return Generator objects.
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var GF = function GeneratorFunction() {};
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var GFp = function GeneratorFunctionPrototype() {};
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var Gp = GFp.prototype = Generator.prototype;
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(GFp.constructor = GF).prototype =
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Gp.constructor = GFp;
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// Ensure isGeneratorFunction works when Function#name not supported.
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var GFName = "GeneratorFunction";
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if (GF.name !== GFName) GF.name = GFName;
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if (GF.name !== GFName) throw new Error(GFName + " renamed?");
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runtime.isGeneratorFunction = function(genFun) {
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var ctor = genFun && genFun.constructor;
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return ctor ? GF.name === ctor.name : false;
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};
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runtime.mark = function(genFun) {
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genFun.__proto__ = GFp;
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genFun.prototype = Object.create(Gp);
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return genFun;
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};
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runtime.async = function(innerFn, outerFn, self, tryList) {
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return new Promise(function(resolve, reject) {
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var generator = wrap(innerFn, outerFn, self, tryList);
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var callNext = step.bind(generator.next);
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var callThrow = step.bind(generator["throw"]);
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function step(arg) {
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var info;
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var value;
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try {
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info = this(arg);
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value = info.value;
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} catch (error) {
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return reject(error);
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}
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if (info.done) {
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resolve(value);
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} else {
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Promise.resolve(value).then(callNext, callThrow);
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}
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}
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callNext();
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});
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};
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function Generator(innerFn, outerFn, self, tryList) {
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var generator = outerFn ? Object.create(outerFn.prototype) : this;
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var context = new Context(tryList);
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var state = GenStateSuspendedStart;
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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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throw new Error("Generator has already finished");
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}
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while (true) {
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var delegate = context.delegate;
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var info;
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if (delegate) {
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try {
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info = delegate.iterator[method](arg);
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// Delegate generator ran and handled its own exceptions so
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// regardless of what the method was, we continue as if it is
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// "next" with an undefined arg.
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method = "next";
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arg = undefined;
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} catch (uncaught) {
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context.delegate = null;
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// Like returning generator.throw(uncaught), but without the
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// overhead of an extra function call.
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method = "throw";
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arg = uncaught;
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continue;
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}
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if (info.done) {
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context[delegate.resultName] = info.value;
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context.next = delegate.nextLoc;
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} else {
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state = GenStateSuspendedYield;
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return info;
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}
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context.delegate = null;
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}
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if (method === "next") {
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if (state === GenStateSuspendedStart &&
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typeof arg !== "undefined") {
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// https://people.mozilla.org/~jorendorff/es6-draft.html#sec-generatorresume
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throw new TypeError(
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"attempt to send " + JSON.stringify(arg) + " to newborn generator"
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);
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}
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if (state === GenStateSuspendedYield) {
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context.sent = arg;
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} else {
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delete context.sent;
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}
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} else if (method === "throw") {
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if (state === GenStateSuspendedStart) {
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state = GenStateCompleted;
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throw arg;
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}
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if (context.dispatchException(arg)) {
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// If the dispatched exception was caught by a catch block,
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// then let that catch block handle the exception normally.
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method = "next";
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arg = undefined;
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}
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} else if (method === "return") {
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context.abrupt("return", arg);
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}
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state = GenStateExecuting;
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try {
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var value = innerFn.call(self, context);
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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 ? GenStateCompleted : GenStateSuspendedYield;
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info = {
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value: value,
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done: context.done
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};
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if (value === ContinueSentinel) {
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if (context.delegate && method === "next") {
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// Deliberately forget the last sent value so that we don't
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// accidentally pass it on to the delegate.
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arg = undefined;
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}
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} else {
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return info;
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}
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} catch (thrown) {
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state = GenStateCompleted;
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if (method === "next") {
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context.dispatchException(thrown);
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} else {
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arg = thrown;
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}
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}
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}
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}
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generator.next = invoke.bind(generator, "next");
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generator["throw"] = invoke.bind(generator, "throw");
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generator["return"] = invoke.bind(generator, "return");
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return generator;
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}
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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(triple) {
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var entry = { tryLoc: triple[0] };
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if (1 in triple) {
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entry.catchLoc = triple[1];
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}
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if (2 in triple) {
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entry.finallyLoc = triple[2];
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}
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this.tryEntries.push(entry);
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}
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function resetTryEntry(entry, i) {
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var record = entry.completion || {};
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record.type = i === 0 ? "normal" : "return";
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delete record.arg;
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entry.completion = record;
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}
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function Context(tryList) {
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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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tryList.forEach(pushTryEntry, this);
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this.reset();
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}
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runtime.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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var iterator = iterable;
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if (iteratorSymbol in iterable) {
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iterator = iterable[iteratorSymbol]();
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} else if (!isNaN(iterable.length)) {
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var i = -1;
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iterator = function next() {
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while (++i < iterable.length) {
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if (i in iterable) {
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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.done = true;
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return next;
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};
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iterator.next = iterator;
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}
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return iterator;
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}
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runtime.values = values;
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Context.prototype = {
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constructor: Context,
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reset: function() {
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this.prev = 0;
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this.next = 0;
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this.sent = undefined;
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this.done = false;
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this.delegate = null;
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this.tryEntries.forEach(resetTryEntry);
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// Pre-initialize at least 20 temporary variables to enable hidden
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// class optimizations for simple generators.
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for (var tempIndex = 0, tempName;
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hasOwn.call(this, tempName = "t" + tempIndex) || tempIndex < 20;
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++tempIndex) {
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this[tempName] = null;
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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;
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if (rootRecord.type === "throw") {
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throw rootRecord.arg;
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}
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return this.rval;
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},
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dispatchException: function(exception) {
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if (this.done) {
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throw exception;
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}
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var context = this;
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function handle(loc, caught) {
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record.type = "throw";
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record.arg = exception;
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context.next = loc;
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return !!caught;
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}
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for (var i = this.tryEntries.length - 1; i >= 0; --i) {
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var entry = this.tryEntries[i];
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var record = entry.completion;
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if (entry.tryLoc === "root") {
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// Exception thrown outside of any try block that could handle
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// it, so set the completion value of the entire function to
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// throw the exception.
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return handle("end");
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}
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if (entry.tryLoc <= this.prev) {
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var hasCatch = hasOwn.call(entry, "catchLoc");
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var hasFinally = hasOwn.call(entry, "finallyLoc");
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if (hasCatch && hasFinally) {
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if (this.prev < entry.catchLoc) {
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return handle(entry.catchLoc, true);
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} else if (this.prev < entry.finallyLoc) {
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return handle(entry.finallyLoc);
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}
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} else if (hasCatch) {
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if (this.prev < entry.catchLoc) {
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return handle(entry.catchLoc, true);
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}
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} else if (hasFinally) {
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if (this.prev < entry.finallyLoc) {
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return handle(entry.finallyLoc);
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}
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} else {
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throw new Error("try statement without catch or finally");
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}
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}
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}
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},
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_findFinallyEntry: function(finallyLoc) {
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for (var i = this.tryEntries.length - 1; i >= 0; --i) {
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var entry = this.tryEntries[i];
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if (entry.tryLoc <= this.prev &&
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hasOwn.call(entry, "finallyLoc") && (
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entry.finallyLoc === finallyLoc ||
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this.prev < entry.finallyLoc)) {
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return entry;
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}
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}
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},
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abrupt: function(type, arg) {
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var entry = this._findFinallyEntry();
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var record = entry ? entry.completion : {};
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record.type = type;
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record.arg = arg;
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if (entry) {
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this.next = entry.finallyLoc;
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} else {
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this.complete(record);
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}
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return ContinueSentinel;
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},
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complete: function(record) {
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if (record.type === "throw") {
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throw record.arg;
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}
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if (record.type === "break" || record.type === "continue") {
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this.next = record.arg;
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} else if (record.type === "return") {
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this.rval = record.arg;
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this.next = "end";
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}
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return ContinueSentinel;
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},
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finish: function(finallyLoc) {
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var entry = this._findFinallyEntry(finallyLoc);
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return this.complete(entry.completion);
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},
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"catch": function(tryLoc) {
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for (var i = this.tryEntries.length - 1; i >= 0; --i) {
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var entry = this.tryEntries[i];
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if (entry.tryLoc === tryLoc) {
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var record = entry.completion;
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var thrown;
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if (record.type === "throw") {
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thrown = record.arg;
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resetTryEntry(entry, i);
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}
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return thrown;
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}
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}
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// The context.catch method must only be called with a location
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// argument that corresponds to a known catch block.
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throw new Error("illegal catch attempt");
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},
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delegateYield: function(iterable, resultName, nextLoc) {
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this.delegate = {
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iterator: values(iterable),
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resultName: resultName,
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nextLoc: nextLoc
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};
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return ContinueSentinel;
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}
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};
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