import { Observable } from "rxjs";
import { type ReadonlySignal } from "../types/index.js";
/**
 * @deprecated Use `Signal.from(observable)` instead. `signalize` re-subscribes
 * to the source on every read: sources without a synchronous (replayed)
 * emission are stuck at `defaultValue` forever, and stateful cold pipelines
 * restart on each read. `Signal.from` keeps the upstream subscription alive
 * (`keepAlive`) and serves hot reads from cache;
 * `Signal.from(obs, { keepAlive: "none" })` reproduces the legacy behavior.
 */
export declare function signalize<T>(observable: Observable<T>): ReadonlySignal<T>;
/**
 * @deprecated Use `Signal.from(observable, { default: defaultValue })` instead
 * (see the no-default overload for details).
 */
export declare function signalize<T>(observable: Observable<T>, defaultValue: T): ReadonlySignal<T>;