export declare const CR = "\r";
export type CR = typeof CR;
export declare const CRLF = "\r\n";
export type CRLF = typeof CRLF;
export declare const LF = "\n";
export type LF = typeof LF;
export type Newline = CRLF | CR | LF;
/**
 * COMMA is a symbol for comma(,).
 */
export declare const COMMA = ",";
/**
 * DOUBLE_QUOTE is a symbol for double quote(").
 */
export declare const DOUBLE_QUOTE = "\"";
export declare const DEFAULT_DELIMITER = ",";
export type DEFAULT_DELIMITER = typeof DEFAULT_DELIMITER;
export declare const DEFAULT_QUOTATION = "\"";
export type DEFAULT_QUOTATION = typeof DEFAULT_QUOTATION;
/**
 * Default threshold (in bytes) for Blob reading strategy.
 *
 * Files smaller than this use `blob.arrayBuffer()` (faster),
 * files equal or larger use `blob.stream()` (memory-efficient).
 *
 * This value is determined by benchmarks.
 *
 * @category Constants
 */
export declare const DEFAULT_ARRAY_BUFFER_THRESHOLD: number;
/**
 * Default maximum buffer size for CSV lexer in characters (UTF-16 code units).
 *
 * @remarks
 * This constant defines the maximum size of the internal buffer used by the CSV lexer
 * during tokenization. The buffer size is measured in UTF-16 code units (JavaScript string length).
 * Approximately 10MB for ASCII text, but may vary for non-ASCII characters.
 *
 * @category Constants
 */
export declare const DEFAULT_LEXER_MAX_BUFFER_SIZE: number;
/**
 * Default maximum field count per record for CSV record assembler.
 *
 * @remarks
 * This constant defines the maximum number of fields (columns) allowed in a single CSV record.
 * This limit helps prevent memory exhaustion attacks from malformed CSV data.
 *
 * @category Constants
 */
export declare const DEFAULT_ASSEMBLER_MAX_FIELD_COUNT = 100000;
/**
 * Default maximum binary size in bytes for ArrayBuffer/Uint8Array inputs.
 *
 * @remarks
 * This constant defines the maximum size for binary data (ArrayBuffer or Uint8Array)
 * to prevent memory exhaustion attacks. Approximately 100MB.
 *
 * @category Constants
 */
export declare const DEFAULT_BINARY_MAX_SIZE: number;
/**
 * Default backpressure check interval for stream transformers.
 *
 * @remarks
 * This constant defines how often stream transformers check for backpressure
 * (measured in number of items processed). The transformer yields to the event loop
 * when backpressure is detected to prevent blocking the main thread.
 *
 * Used by CSVLexerTransformer, StringCSVParserStream, and BinaryCSVParserStream.
 *
 * @category Constants
 */
export declare const DEFAULT_STREAM_BACKPRESSURE_CHECK_INTERVAL = 100;
/**
 * Default backpressure check interval for record assembler transformer.
 *
 * @remarks
 * This constant defines how often the record assembler transformer checks for backpressure
 * (measured in number of records processed). A lower value than general stream transformers
 * is used because record assembly is a more granular operation.
 *
 * Used by CSVRecordAssemblerTransformer.
 *
 * @category Constants
 */
export declare const DEFAULT_ASSEMBLER_BACKPRESSURE_CHECK_INTERVAL = 10;
/**
 * Delimiter type enumeration for unified token format.
 *
 * Used in the new FieldToken format to indicate what follows the field value.
 * This enables a more efficient token format where only field tokens are emitted.
 *
 * @category Constants
 */
export declare enum Delimiter {
    /** Next token is a field (followed by field delimiter like comma) */
    Field = 0,
    /** Next token is a record delimiter (newline) */
    Record = 1
}