75 lines
2.2 KiB
JavaScript
75 lines
2.2 KiB
JavaScript
import { _ as _overload_yield } from "./_overload_yield.js";
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function _async_generator(gen) {
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var front, back;
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function send(key, arg) {
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return new Promise(function(resolve, reject) {
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var request = { key: key, arg: arg, resolve: resolve, reject: reject, next: null };
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if (back) back = back.next = request;
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else {
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front = back = request;
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resume(key, arg);
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}
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});
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}
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function resume(key, arg) {
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try {
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var result = gen[key](arg);
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var value = result.value;
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var overloaded = value instanceof _overload_yield;
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Promise.resolve(overloaded ? value.v : value).then(function(arg) {
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if (overloaded) {
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var nextKey = key === "return" ? "return" : "next";
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if (!value.k || arg.done) return resume(nextKey, arg);
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else arg = gen[nextKey](arg).value;
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}
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settle(result.done ? "return" : "normal", arg);
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}, function(err) {
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resume("throw", err);
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});
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} catch (err) {
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settle("throw", err);
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}
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}
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function settle(type, value) {
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switch (type) {
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case "return":
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front.resolve({ value: value, done: true });
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break;
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case "throw":
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front.reject(value);
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break;
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default:
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front.resolve({ value: value, done: false });
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break;
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}
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front = front.next;
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if (front) resume(front.key, front.arg);
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else back = null;
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}
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this._invoke = send;
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if (typeof gen.return !== "function") this.return = undefined;
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}
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_async_generator.prototype[(typeof Symbol === "function" && Symbol.asyncIterator) || "@@asyncIterator"] = function() {
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return this;
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};
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_async_generator.prototype.next = function(arg) {
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return this._invoke("next", arg);
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};
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_async_generator.prototype.throw = function(arg) {
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return this._invoke("throw", arg);
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};
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_async_generator.prototype.return = function(arg) {
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return this._invoke("return", arg);
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};
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export { _async_generator as _ };
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