| 1 | "use strict";
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| 2 |
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| 3 | Object.defineProperty(exports, "__esModule", {
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| 4 | value: true
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| 5 | });
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| 6 | exports.once = once;
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| 7 | var _async = require("./async");
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| 8 | function once(fn) {
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| 9 | let result;
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| 10 | let resultP;
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| 11 | return function* () {
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| 12 | if (result) return result;
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| 13 | if (!(yield* (0, _async.isAsync)())) return result = yield* fn();
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| 14 | if (resultP) return yield* (0, _async.waitFor)(resultP);
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| 15 | let resolve, reject;
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| 16 | resultP = new Promise((res, rej) => {
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| 17 | resolve = res;
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| 18 | reject = rej;
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| 19 | });
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| 20 | try {
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| 21 | result = yield* fn();
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| 22 | resultP = null;
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| 23 | resolve(result);
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| 24 | return result;
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| 25 | } catch (error) {
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| 26 | reject(error);
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| 27 | throw error;
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| 28 | }
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| 29 | };
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| 30 | }
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| 31 | 0 && 0;
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| 32 |
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| 33 |
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