import { Primitive } from './isPrimitive';
import { ValidationException } from './ValidationException';
/**
 * Is the value an empty string, null, undefined or NaN?
 *
 * @example
 * ```ts
 * isEmptyPrimitive('') // true
 * isEmptyPrimitive('example') // false
 * ```
 *
 * @param value the value to check
 * @returns a boolean indicating whether the value is the expected type
 */
export declare const isEmptyPrimitive: (value: unknown) => value is Primitive;
/**
 * Validate that the value is an empty string, null, undefined or NaN.
 *
 * @example
 * ```ts
 * validateEmptyPrimitive('') // null
 * validateEmptyPrimitive('example') // ValidationException
 * ```
 *
 * @param value the value to check
 * @returns `null` if the value is the expected type or a `ValidationException`
 * if not
 */
export declare const validateEmptyPrimitive: (value: unknown) => ValidationException | null;
/**
 * Assert that the value is an empty string, null, undefined or NaN.
 *
 * @example
 * ```ts
 * assertEmptyPrimitive('') // void
 * assertEmptyPrimitive('example') // throws AssertionException
 * ```
 *
 * @param value the value to check
 * @throws an `AssertionException` if the value is not the expected type
 */
export declare const assertEmptyPrimitive: (value: unknown) => asserts value is Primitive;