59 lines
1.3 KiB
Plaintext
59 lines
1.3 KiB
Plaintext
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.once = once;
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var _async = require("./async.js");
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function once(fn) {
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let result;
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let resultP;
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let promiseReferenced = false;
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return function* () {
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if (!result) {
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if (resultP) {
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promiseReferenced = true;
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return yield* (0, _async.waitFor)(resultP);
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}
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if (!(yield* (0, _async.isAsync)())) {
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try {
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result = {
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ok: true,
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value: yield* fn()
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};
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} catch (error) {
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result = {
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ok: false,
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value: error
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};
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}
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} else {
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let resolve, reject;
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resultP = new Promise((res, rej) => {
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resolve = res;
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reject = rej;
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});
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try {
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result = {
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ok: true,
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value: yield* fn()
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};
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resultP = null;
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if (promiseReferenced) resolve(result.value);
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} catch (error) {
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result = {
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ok: false,
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value: error
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};
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resultP = null;
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if (promiseReferenced) reject(error);
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}
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}
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}
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if (result.ok) return result.value;else throw result.value;
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};
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}
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0 && 0;
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//# sourceMappingURL=functional.js.map
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