import { OperatorFunction } from 'rxjs';
/** Reduces an array from a stream of `ReducerAction`. */
export declare function actionArrayReducer<T>(): OperatorFunction<ReducerAction<T>, T[]>;
export interface AddAction<T> {
    action: 'add';
    value: T;
}
export interface ClearAction {
    action: 'clear';
}
export interface PushAction {
    action: 'push';
}
export interface RemoveAction<T> {
    action: 'remove';
    value: T;
}
export interface UpdateAction<T> {
    action: 'update';
    newValue: T;
    oldValue: T;
}
export declare type ReducerAction<T> = AddAction<T> | ClearAction | PushAction | RemoveAction<T> | UpdateAction<T>;