import { Reducer, SetStateAction } from 'react';
export declare type Initializer<T> = T | (() => T);
export declare type SyncDispatch<S, A = SetStateAction<S>> = (action: A) => S;
export interface RefState<State, Action = SetStateAction<State>> {
    current: State;
    setState: SyncDispatch<State, Action>;
}
interface UseRefState {
    <S>(initial: Initializer<S>): RefState<S>;
    <S = undefined>(): RefState<S | undefined>;
    <S, A = void>(reducer: Reducer<S, A>, initial: S): RefState<S, A>;
    <S, I = S, A = void>(reducer: Reducer<S, A>, initArg: I, initializer: (i: I) => S): RefState<S, A>;
    <S = undefined, A = void>(reducer: Reducer<S | undefined, A>): RefState<S | undefined, A>;
}
declare const _default: UseRefState;
export default _default;