import type { BuildExecutor, BuildOptions, BuildResult } from '../build-adapter.js';
/**
 * Concurrency-limited build executor wrapper.
 *
 * @remarks
 * Runs up to `limit` builds concurrently. Use for independent route-module
 * and HMR browser builds where FIFO serialization is unnecessary.
 */
export declare class ParallelBuildExecutor implements BuildExecutor {
    private readonly inner;
    private readonly limit;
    private activeCount;
    private queue;
    constructor(inner: BuildExecutor, limit: number);
    build(options: BuildOptions): Promise<BuildResult>;
    private drainQueue;
    unwrap(): BuildExecutor;
    getConcurrencyLimitForTests(): number;
    getActiveCountForTests(): number;
    getQueuedCountForTests(): number;
}