import Dep from './dep';
import { SimpleSet } from "../shared/env";
export interface WatcherOptions {
    deep?: boolean;
    lazy?: boolean;
    sync?: boolean;
    before?: Function;
}
export default class Watcher {
    vm: any;
    id: number;
    expression: string;
    cb: Function;
    deep: boolean;
    lazy: boolean;
    sync: boolean;
    dirty: boolean;
    deps: Array<Dep>;
    newDeps: Array<Dep>;
    depIds: SimpleSet;
    newDepIds: SimpleSet;
    getter: Function;
    value: any;
    before: Function;
    active: boolean;
    constructor(vm: any, expOrFn: string | Function, cb: Function, options?: WatcherOptions);
    /**
     * Evaluate the getter, and re-collect dependencies.
     */
    get(): any;
    addDep(dep: Dep): void;
    /**
     * Clean up for dependency collection.
     */
    cleanupDeps(): void;
    /**
     * Subscriber interface.
     * Will be called when a dependency changes.
     */
    update(): void;
    /**
     * Scheduler job interface.
     * Will be called by the scheduler.
     */
    run(): void;
    /**
     * Evaluate the value of the watcher.
     * This only gets called for lazy watchers.
     */
    evaluate(): void;
    /**
     * Depend on all deps collected by this watcher.
     */
    depend(): void;
}