import { VLogger } from "./util/VLogger";
import { WatcherDefinition } from "./VWatcherOptions";
/**
 * Manages watchers for reactive property observation.
 * Provides Vue.js-like watch functionality for tracking property changes.
 */
export declare class VWatcher {
    #private;
    /**
     * Creates a new VWatcher instance.
     * @param logger Optional logger instance for debugging.
     */
    constructor(logger?: VLogger);
    /**
     * Registers a watcher for a property path.
     * @param path The property path to watch (e.g., "count", "user.name").
     * @param definition The watcher definition (callback function or options object).
     * @param getCurrentValue A function that returns the current value of the property.
     */
    register(path: string, definition: WatcherDefinition, getCurrentValue: (path: string) => any): void;
    /**
     * Checks all watchers against the current changes and triggers callbacks as needed.
     * @param changes The list of changed property paths.
     * @param getValue A function that returns the current value of a property.
     * @param context The context object to use as 'this' when calling handlers.
     */
    notify(changes: string[], getValue: (path: string) => any, context: any): void;
    /**
     * Updates the cached old values for all watchers.
     * This should be called after processing to ensure old values are current.
     * @param getValue A function that returns the current value of a property.
     */
    updateCachedValues(getValue: (path: string) => any): void;
    /**
     * Clears all registered watchers.
     */
    clear(): void;
    /**
     * Gets the number of registered watchers.
     */
    get count(): number;
}