@quick-game/cli
Version:
Command line interface for rapid qg development
27 lines • 744 B
JavaScript
// Copyright 2020 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
const UNINITIALIZED = Symbol('uninitialized');
const ERROR_STATE = Symbol('error');
export function lazy(producer) {
let value = UNINITIALIZED;
let error = null;
return () => {
if (value === ERROR_STATE) {
throw error;
}
else if (value !== UNINITIALIZED) {
return value;
}
try {
value = producer();
return value;
}
catch (err) {
error = err;
value = ERROR_STATE;
throw error;
}
};
}
//# sourceMappingURL=Lazy.js.map