/**
 * Converts full-width Japanese characters to half-width equivalents
 * Supports: numbers (０-９), period (．), comma (，), minus (－)
 */
export declare const convertFullWidthToHalfWidth: (str: string) => string;
/**
 * Escapes special regex characters in a string
 */
export declare const escapeRegex: (str: string) => string;
/**
 * Checks if a string is a minus sign (half-width, full-width, katakana, or mathematical)
 */
export declare const isMinusSign: (str: string) => boolean;
/**
 * Converts any minus sign variant to half-width minus
 */
export declare const normalizeMinusSign: (str: string) => string;
/**
 * Parses a value prop (string or number) to a number, removing separator if present
 */
export declare const parseValueProp: (value: string | number | readonly string[] | null | undefined, separator?: string) => number;
/**
 * Normalizes the input string by removing invalid characters
 * and ensuring proper decimal point handling
 */
export declare const normalizeNumericInput: (input: string, allowDecimal: boolean, allowNegative: boolean, maxLength?: number) => string;
/**
 * Count digit characters (0-9) from the start of string up to (but not including) position.
 * Used to preserve cursor position when reformatting (e.g. adding/removing thousand separators).
 */
export declare const countDigitsBefore: (str: string, position: number) => number;
/**
 * Find the position in the formatted string where the digit count from the start equals digitCount.
 * Returns the position right after the digitCount-th digit (suitable for selectionStart).
 * When digitCount is 0, returns 0 (cursor at start); never returns past-the-end for cursor placement.
 */
export declare const positionAfterDigitCount: (str: string, digitCount: number) => number;
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