node-ejs-renderer/node_modules/webpack/lib/util/memoize.js
2024-06-09 13:55:01 -04:00

35 lines
722 B
JavaScript

/*
MIT License http://www.opensource.org/licenses/mit-license.php
*/
"use strict";
/** @template T @typedef {function(): T} FunctionReturning */
/**
* @template T
* @param {FunctionReturning<T>} fn memorized function
* @returns {FunctionReturning<T>} new function
*/
const memoize = fn => {
let cache = false;
/** @type {T | undefined} */
let result = undefined;
return () => {
if (cache) {
return /** @type {T} */ (result);
} else {
result = fn();
cache = true;
// Allow to clean up memory for fn
// and all dependent resources
// eslint-disable-next-line no-warning-comments
// @ts-ignore
fn = undefined;
return /** @type {T} */ (result);
}
};
};
module.exports = memoize;