/**
 * Format keys that can be used in mask format
 */
export declare const FORMAT_KEYS: string[];
/**
 * Cell represents a single mask field or separator in the format
 */
export interface Cell {
    /** Text content of this cell */
    text: string;
    /** Mask key if this is an editable field (e.g., 'YYYY', 'MM'), undefined for separators */
    mask?: string;
    /** Start position in the format string */
    start: number;
    /** End position in the format string */
    end: number;
}
/**
 * Get valid range for a mask field
 * @param key Mask key (e.g., 'YYYY', 'MM', 'DD')
 * @returns [min, max] tuple
 */
export declare function getMaskRange(key: string): [number, number];
/**
 * MaskFormat class parses format string into cells for mask input
 */
export default class MaskFormat {
    /** All cells including separators */
    cells: Cell[];
    /** Only editable mask cells (excludes separators) */
    maskCells: Cell[];
    constructor(format: string);
    /**
     * Check if text matches this format
     * @param text Input text to validate
     * @returns true if text structure matches format
     */
    match(text: string): boolean;
}