File size: 1,300 Bytes
11897b6 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | "use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.once = once;
var _async = require("./async.js");
function once(fn) {
let result;
let resultP;
let promiseReferenced = false;
return function* () {
if (!result) {
if (resultP) {
promiseReferenced = true;
return yield* (0, _async.waitFor)(resultP);
}
if (!(yield* (0, _async.isAsync)())) {
try {
result = {
ok: true,
value: yield* fn()
};
} catch (error) {
result = {
ok: false,
value: error
};
}
} else {
let resolve, reject;
resultP = new Promise((res, rej) => {
resolve = res;
reject = rej;
});
try {
result = {
ok: true,
value: yield* fn()
};
resultP = null;
if (promiseReferenced) resolve(result.value);
} catch (error) {
result = {
ok: false,
value: error
};
resultP = null;
if (promiseReferenced) reject(error);
}
}
}
if (result.ok) return result.value;else throw result.value;
};
}
0 && 0;
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