import { DeclensionInput, GenderDetectionInput } from './contracts';
export declare class InputValidationError extends TypeError {
}
/**
 * Validates and normalizes declension input.
 *
 * Validates that the input is a valid declension input object and normalizes all string fields
 * to NFC (Canonical Decomposition followed by Canonical Composition) form to ensure Unicode
 * characters are in a consistent form for reliable pattern matching with Cyrillic characters.
 *
 * @param input - The input to validate and normalize
 * @returns A new validated and normalized input object
 * @throws {InputValidationError} If validation fails
 */
export declare function validateDeclensionInput<T extends DeclensionInput>(input: T): T;
/**
 * Validates and normalizes gender detection input.
 *
 * Validates that the input is a valid gender detection input object and normalizes all string
 * fields to NFC (Canonical Decomposition followed by Canonical Composition) form to ensure
 * Unicode characters are in a consistent form for reliable pattern matching with Cyrillic characters.
 *
 * @param input - The input to validate and normalize
 * @returns A new validated and normalized input object
 * @throws {InputValidationError} If validation fails
 */
export declare function validateGenderDetectionInput<T extends GenderDetectionInput>(input: T): T;