/**
 * Type definition for the reactive expression.
 * 'this' is typed as the component instance.
 */
type WatchExpression<T = any> = (this: T) => any;
/**
 * The 's' (stream) utility: Provides "Auto-Tracked" reactivity.
 *
 * Unlike standard 'watch', it treats the expression as a dynamic stream.
 * It surgically extracts dependencies via regex from the function source,
 * removing the need for manual reference arrays.
 *
 * It creates a placeholder <in-watch> and registers it to the component
 * instance for O(1) targeted updates.
 */
export declare const s: (exp: WatchExpression) => string;
export {};