import { Observable } from 'rxjs';
import { A as Atom, D as DestroyableAtom, S as Signal } from './types-CxOJPpKX.js';
import { S as SignalObserveOptions } from './observe-Dt3_PKtB.js';

/**
 * Provider for a value of a state.
 */
type Query<T> = Readonly<{
    /** Returns the value of a state */
    get: () => T;
    /** `Observable` for value changes.  */
    value$: Observable<T>;
}>;
/**
 * Creates a Query for the given Atom
 */
declare function toQuery<T>(source: Atom<T>): Query<T>;
/**
 * Creates an Atom from a Query
 */
declare function fromQuery<T>(query: Query<T>): DestroyableAtom<T>;

/**
 * Action of Rx-Effects
 */
type Action<Event> = {
    readonly event$: Observable<Event>;
    (event: Event): void;
} & ([Event] extends [undefined | void] ? {
    (event?: Event): void;
} : {
    (event: Event): void;
});
declare function toAction<T>(source: Signal<T>, options?: SignalObserveOptions): Action<T>;
declare function fromAction<T>(action: Action<T>): Signal<T>;

export { fromAction, fromQuery, toAction, toQuery };