import { CSVRecord, CSVRecordAssembler, CSVRecordAssemblerTransformerStreamOptions, Token } from '../../core/types';
import { FlexibleCSVArrayRecordAssembler } from '../models/FlexibleCSVArrayRecordAssembler';
import { FlexibleCSVObjectRecordAssembler } from '../models/FlexibleCSVObjectRecordAssembler';
/**
 * A transform stream that converts a stream of tokens into a stream of CSV records.
 *
 * For most use cases, prefer the factory function {@link createCSVRecordAssemblerTransformer}.
 * Use this class directly only when you need a custom assembler implementation.
 *
 * @category Low-level API
 *
 * @template Header The type of the header row.
 * @template Format The output format ('object' or 'array').
 * @param assembler - A CSVRecordAssembler instance (required). Use {@link createCSVRecordAssembler} to create one.
 * @param options - Stream-specific options (backpressureCheckInterval, etc.)
 * @param writableStrategy - Strategy for the writable side (default: `{ highWaterMark: 1024, size: () => 1 }`)
 * @param readableStrategy - Strategy for the readable side (default: `{ highWaterMark: 256, size: () => 1 }`)
 *
 * @see {@link https://github.com/kamiazya/web-csv-toolbox/blob/main/docs/how-to-guides/choosing-the-right-api.md | Choosing the Right API} for guidance on selecting the appropriate API level.
 *
 * @example Custom assembler implementation
 * ```ts
 * import { CSVRecordAssemblerTransformer, type CSVObjectRecordAssembler, type Token } from 'web-csv-toolbox';
 *
 * // Custom assembler for specialized record formats
 * class MyCustomAssembler implements CSVObjectRecordAssembler<readonly string[]> {
 *   *assemble(
 *     input?: Token | Iterable<Token>,
 *     options?: { stream?: boolean }
 *   ): IterableIterator<Record<string, string>> {
 *     // Custom assembly logic
 *   }
 * }
 *
 * const customAssembler = new MyCustomAssembler();
 * tokenStream.pipeThrough(new CSVRecordAssemblerTransformer(customAssembler));
 * ```
 */
export declare class CSVRecordAssemblerTransformer<Header extends ReadonlyArray<string>, Format extends "object" | "array" = "object"> extends TransformStream<Token, CSVRecord<Header, Format>> {
    readonly assembler: CSVRecordAssembler<Header, Format> | FlexibleCSVObjectRecordAssembler<Header> | FlexibleCSVArrayRecordAssembler<Header>;
    /**
     * Yields to the event loop to allow backpressure handling.
     * Can be overridden for testing purposes.
     * @internal
     */
    protected yieldToEventLoop(): Promise<void>;
    constructor(assembler: CSVRecordAssembler<Header, Format> | FlexibleCSVObjectRecordAssembler<Header> | FlexibleCSVArrayRecordAssembler<Header>, options?: CSVRecordAssemblerTransformerStreamOptions, writableStrategy?: QueuingStrategy<Token>, readableStrategy?: QueuingStrategy<CSVRecord<Header, Format>>);
}