| 1 | "use strict";
|
| 2 |
|
| 3 | Object.defineProperty(exports, "__esModule", {
|
| 4 | value: true
|
| 5 | });
|
| 6 | exports.once = once;
|
| 7 | var _async = require("./async.js");
|
| 8 | function once(fn) {
|
| 9 | let result;
|
| 10 | let resultP;
|
| 11 | let promiseReferenced = false;
|
| 12 | return function* () {
|
| 13 | if (!result) {
|
| 14 | if (resultP) {
|
| 15 | promiseReferenced = true;
|
| 16 | return yield* (0, _async.waitFor)(resultP);
|
| 17 | }
|
| 18 | if (!(yield* (0, _async.isAsync)())) {
|
| 19 | try {
|
| 20 | result = {
|
| 21 | ok: true,
|
| 22 | value: yield* fn()
|
| 23 | };
|
| 24 | } catch (error) {
|
| 25 | result = {
|
| 26 | ok: false,
|
| 27 | value: error
|
| 28 | };
|
| 29 | }
|
| 30 | } else {
|
| 31 | let resolve, reject;
|
| 32 | resultP = new Promise((res, rej) => {
|
| 33 | resolve = res;
|
| 34 | reject = rej;
|
| 35 | });
|
| 36 | try {
|
| 37 | result = {
|
| 38 | ok: true,
|
| 39 | value: yield* fn()
|
| 40 | };
|
| 41 | resultP = null;
|
| 42 | if (promiseReferenced) resolve(result.value);
|
| 43 | } catch (error) {
|
| 44 | result = {
|
| 45 | ok: false,
|
| 46 | value: error
|
| 47 | };
|
| 48 | resultP = null;
|
| 49 | if (promiseReferenced) reject(error);
|
| 50 | }
|
| 51 | }
|
| 52 | }
|
| 53 | if (result.ok) return result.value;else throw result.value;
|
| 54 | };
|
| 55 | }
|
| 56 | 0 && 0;
|
| 57 |
|
| 58 |
|