import { AnyToken, CSVArrayRecord, CSVRecordAssemblerAssembleOptions, CSVRecordAssemblerCommonOptions } from '../../core/types';
/**
 * Flexible CSV Array Record Assembler implementation.
 *
 * An optimized assembler that works with unified field tokens.
 * No switch statement needed - simply processes each field and checks
 * the `delimiter` property to determine when a record is complete.
 *
 * @remarks
 * This implementation provides better performance by eliminating
 * the token type switch statement and reducing token iteration count by 50%.
 */
export declare class FlexibleCSVArrayRecordAssembler<const Header extends ReadonlyArray<string>> {
    #private;
    constructor(options?: CSVRecordAssemblerCommonOptions<Header>);
    /**
     * Assembles tokens into CSV records.
     * @param input - A single token or an iterable of tokens. Omit to flush remaining data.
     * @param options - Assembler options.
     * @returns An iterable iterator of CSV records.
     */
    assemble(input?: AnyToken | Iterable<AnyToken>, options?: CSVRecordAssemblerAssembleOptions): IterableIterator<CSVArrayRecord<Header>>;
}