import type { StoreApi } from '../store/types';
import type { DeriveGetter } from '../types';
import type { NonFunction } from '../types/functions';
declare const QUERY_PARAM_CONFIG: unique symbol;
/**
 * Selects how a query parameter participates in the query key.
 */
export type QueryParamKey<T> = false | ((value: T) => unknown);
/**
 * A query value derived from stores via `$`.
 */
export type ReactiveParam<T, State> = ($: DeriveGetter, store: StoreApi<State>) => T;
/**
 * Query parameter wrapper for values whose fetcher value and key value differ.
 */
export type QueryParamConfig<T, State> = {
    readonly [QUERY_PARAM_CONFIG]: true;
    readonly key: QueryParamKey<T>;
    readonly value: NonFunction<T> | ReactiveParam<T, State>;
};
/**
 * A direct, reactive, or key-configured query parameter.
 */
export type QueryParam<T, State> = NonFunction<T> | ReactiveParam<T, State> | QueryParamConfig<T, State>;
/**
 * Wraps a query parameter when its full fetcher value should be excluded
 * from the query key or represented by a smaller key value.
 */
export declare function queryParam<T, State>(value: NonFunction<T> | ReactiveParam<T, State>, options: {
    key: QueryParamKey<T>;
}): QueryParamConfig<T, State>;
/**
 * Checks if a `QueryParam` value is a custom `queryParam(...)` config.
 */
export declare function isQueryParamConfig<T, State>(value: QueryParam<T, State>): value is QueryParamConfig<T, State>;
export {};
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