import { Callbag, Source } from 'callbag';
import { Change, MsgType, State, SubState } from 'callbag-state';
import { Watcher } from './watcher';
export declare type KeyFunc<T> = (t: T) => number | string;
export declare type KeyMap<T> = {
    [key: string]: {
        index: number;
        item: T;
    };
};
export declare type Addition<T> = {
    index: number;
    item: T;
};
export declare type Deletion<T> = {
    index: number;
    item: T;
};
export declare type Move<T> = {
    oldIndex: number;
    newIndex: number;
    item: T;
};
export declare type ListChanges<T> = {
    additions: Addition<T>[];
    deletions: Deletion<T>[];
    moves: Move<T>[];
};
export declare type KeyedChangeStream<T> = Source<[Change<T[]>, ListChanges<T>]>;
export declare type KeyedStateMsgType = MsgType | typeof _Latest | typeof _KeyChangeStream | typeof _Watcher;
export declare type KeyedState<T> = Callbag<T[], T[]> & {
    get(): T[];
    set(t: T[]): void;
    clear(): void;
    keyfunc: (t: T) => string | number;
    state: State<T[]>;
    changestream: KeyedChangeStream<T>;
    watcher: Watcher<T>;
    changes(): Source<ListChanges<T>>;
    index(k: string | number): Source<number> & {
        get(): number | undefined;
    };
    key(k: string | number): SubState<T[], number>;
};
export declare function isKeyedState<T>(cb: Source<T[]>): cb is KeyedState<T>;
export declare const _Latest = 100;
export declare const _KeyChangeStream = 201;
export declare const _Watcher = 202;