setup-python/node_modules/ts-jest/dist/util/memoize.js
Danny McCormick 39c08a0eaa Initial pass
2019-06-26 21:12:00 -04:00

48 lines
1.5 KiB
JavaScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var cacheProp = Symbol.for('[memoize]');
function Memoize(keyBuilder) {
return function (_, propertyKey, descriptor) {
if (descriptor.value != null) {
descriptor.value = memoize(propertyKey, descriptor.value, keyBuilder || (function (v) { return v; }));
}
else if (descriptor.get != null) {
descriptor.get = memoize(propertyKey, descriptor.get, keyBuilder || (function () { return propertyKey; }));
}
};
}
exports.Memoize = Memoize;
function ensureCache(target, reset) {
if (reset === void 0) { reset = false; }
if (reset || !target[cacheProp]) {
Object.defineProperty(target, cacheProp, {
value: Object.create(null),
configurable: true,
});
}
return target[cacheProp];
}
function ensureChildCache(target, key, reset) {
if (reset === void 0) { reset = false; }
var dict = ensureCache(target);
if (reset || !dict[key]) {
dict[key] = new Map();
}
return dict[key];
}
function memoize(namespace, func, keyBuilder) {
return function () {
var args = [];
for (var _i = 0; _i < arguments.length; _i++) {
args[_i] = arguments[_i];
}
var cache = ensureChildCache(this, namespace);
var key = keyBuilder.apply(this, args);
if (cache.has(key))
return cache.get(key);
var res = func.apply(this, args);
cache.set(key, res);
return res;
};
}