import { ValidationException } from './ValidationException';
/**
 * Is the value a Symbol?
 * See: https://developer.mozilla.org/en-US/docs/Glossary/Symbol
 *
 * @example
 * ```ts
 * isSymbol(Symbol('')) // true
 * isSymbol('') // false
 * ```
 *
 * @param value the value to check
 * @returns a boolean indicating whether the value is the expected type
 */
export declare const isSymbol: (value: unknown) => value is symbol;
/**
 * Validate that the value is a Symbol.
 * See: https://developer.mozilla.org/en-US/docs/Glossary/Symbol
 *
 * @example
 * ```ts
 * validateSymbol(Symbol('')) // null
 * validateSymbol('') // ValidationException
 * ```
 *
 * @param value the value to check
 * @returns `null` if the value is the expected type or a `ValidationException`
 * if not
 */
export declare const validateSymbol: (value: unknown) => ValidationException | null;
/**
 * Assert that the value is a Symbol.
 * See: https://developer.mozilla.org/en-US/docs/Glossary/Symbol
 *
 * @example
 * ```ts
 * assertSymbol(Symbol('')) // void
 * assertSymbol('') // throws AssertionException
 * ```
 *
 * @param value the value to check
 * @throws an `AssertionException` if the value is not the expected type
 */
export declare const assertSymbol: (value: unknown) => asserts value is symbol;