import type { AsyncState } from './types.js';
/**
 * Decorator that syncs an async state and automatically updates the decorated property
 * with the latest value from a Promise or AsyncIterable.
 *
 * The decorator accepts a factory function that will be called for each component instance
 * to create the async state to sync.
 *
 * @example
 * ```ts
 * class MyElement extends LitElement {
 *   @sync(() => fetchData())
 *   accessor data: string | undefined;
 *
 *   @sync(() => pollingGenerator())
 *   accessor liveData: number | undefined;
 *
 *   @sync(function() { return this.myAsyncMethod() })
 *   accessor computed: string | undefined;
 * }
 * ```
 *
 * @param stateFactory - A function that returns the async state to sync (Promise, AsyncIterable, or direct value)
 * @returns A property decorator function
 */
export declare function sync<T>(stateFactory: (this: any) => AsyncState<T>): (target: ClassAccessorDecoratorTarget<any, T | undefined>, context: ClassAccessorDecoratorContext) => ClassAccessorDecoratorResult<any, T | undefined>;
//# sourceMappingURL=decorator.d.ts.map