weakref/esm/weak_value_map.js

Extend built-in collections with weak references for efficient garbage collection and optimal performance in memory-intensive applications with IterableWeakSet, IterableWeakMap, and WeakValueMap.

var __classPrivateFieldGet = (this && this.__classPrivateFieldGet) || function (receiver, state, kind, f) {
    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
    if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it");
    return kind === "m" ? f : kind === "a" ? f.call(receiver) : f ? f.value : state.get(receiver);
};
var _WeakValueMap_map, _WeakValueMap_registry;
export class WeakValueMap {
    constructor(iterable) {
        _WeakValueMap_map.set(this, new Map());
        _WeakValueMap_registry.set(this, new FinalizationRegistry(__classPrivateFieldGet(this, _WeakValueMap_map, "f").delete.bind(__classPrivateFieldGet(this, _WeakValueMap_map, "f"))));
        for (const [key, value] of iterable ?? []) {
            this.set(key, value);
        }
    }
    get size() {
        return __classPrivateFieldGet(this, _WeakValueMap_map, "f").size;
    }
    clear() {
        for (const key of __classPrivateFieldGet(this, _WeakValueMap_map, "f").keys()) {
            this.delete(key);
        }
    }
    delete(key) {
        const ref = __classPrivateFieldGet(this, _WeakValueMap_map, "f").get(key);
        if (ref) {
            __classPrivateFieldGet(this, _WeakValueMap_map, "f").delete(key);
            __classPrivateFieldGet(this, _WeakValueMap_registry, "f").unregister(ref);
            return true;
        }
        return false;
    }
    get(key) {
        return __classPrivateFieldGet(this, _WeakValueMap_map, "f").get(key)?.deref();
    }
    has(key) {
        return __classPrivateFieldGet(this, _WeakValueMap_map, "f").has(key);
    }
    set(key, value) {
        const ref = new WeakRef(value);
        __classPrivateFieldGet(this, _WeakValueMap_map, "f").set(key, ref);
        __classPrivateFieldGet(this, _WeakValueMap_registry, "f").register(value, key, ref);
        return this;
    }
    get [(_WeakValueMap_map = new WeakMap(), _WeakValueMap_registry = new WeakMap(), Symbol.toStringTag)]() {
        return "WeakValueMap";
    }
    forEach(callbackfn, thisArg) {
        for (const [key, value] of this[Symbol.iterator]()) {
            callbackfn.call(thisArg, value, key, this);
        }
    }
    *[Symbol.iterator]() {
        for (const [key, ref] of __classPrivateFieldGet(this, _WeakValueMap_map, "f")) {
            yield [key, ref.deref()];
        }
    }
    entries() {
        return this[Symbol.iterator]();
    }
    keys() {
        return __classPrivateFieldGet(this, _WeakValueMap_map, "f").keys();
    }
    *values() {
        for (const ref of __classPrivateFieldGet(this, _WeakValueMap_map, "f").values()) {
            yield ref.deref();
        }
    }
}