import { Reducer } from '../../utils';
import { UseComboboxMergedProps, UseComboboxReducerAction, UseComboboxState } from '../index.types';
/**
 * The useCombobox version of useControlledReducer, which also
 * checks if the controlled prop selectedItem changed between
 * renders. If so, it will also update inputValue with its
 * string equivalent. It uses the common useEnhancedReducer to
 * compute the rest of the state.
 *
 * @param reducer Reducer function from downshift.
 * @param props The hook props, also passed to createInitialState.
 * @param createInitialState Function that returns the initial state.
 * @param isStateEqual Function that checks if a previous state is equal to the next.
 * @returns An array with the state and an action dispatcher.
 */
export declare function useControlledReducer<Item>(reducer: Reducer<UseComboboxState<Item>, UseComboboxReducerAction<Item>>, props: UseComboboxMergedProps<Item>, createInitialState: (props: UseComboboxMergedProps<Item>) => UseComboboxState<Item>, isStateEqual: (prev: UseComboboxState<Item>, next: UseComboboxState<Item>) => boolean): [UseComboboxState<Item>, (action: UseComboboxReducerAction<Item>) => void];