import { type ReadonlySignal, type Signal } from './signals.js';
type SignalLike<T> = Pick<Signal<T>, 'peek' | 'subscribe'> & Partial<Pick<Signal<T>, '__isSignal'>>;
type PrimitiveLike = string | number | bigint | boolean | symbol | null | undefined;
export interface FieldRef<T> {
    readonly __isSignal: true;
    readonly value: T;
    peek(): T;
    subscribe(fn: (value: T) => void): () => void;
    map<U>(selector: (value: T) => U): ReadonlySignal<U>;
    valueOf(): T;
    toString(): string;
    [Symbol.toPrimitive](hint: string): PrimitiveLike;
}
export declare function createFieldRef<T>(signal: SignalLike<T>): FieldRef<T>;
export {};
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