import { Supply } from './Supply.js';
import { Subscriber } from './Subscriber.js';
import { WritableSignal } from './WritableSignal.js';
export declare class Signal<T> implements WritableSignal<T> {
    #private;
    private static equals;
    private value;
    private readonly subscribers;
    private readonly invalidators;
    get supply(): Supply<T>;
    constructor(initialValue: T);
    get(): T;
    set(value: T): void;
    update(updater: (value: T) => T): void;
    subscribe(subscriber: Subscriber<T>): () => void;
    subscribeDeferred(subscriber: Subscriber<T>): () => void;
    notify(): void;
    derive<U>(callback: (value: T) => U): Signal<U>;
    private invoke;
}