import { N as NarrowedTo } from './NarrowedTo-CDIykNaN.cjs';
import 'type-fest';

/**
 * A function that checks if the passed parameter is a boolean and narrows its type accordingly.
 *
 * @param data - The variable to check.
 * @returns True if the passed input is a boolean, false otherwise.
 * @signature
 *    R.isBoolean(data)
 * @example
 *    R.isBoolean(true) //=> true
 *    R.isBoolean(false) //=> true
 *    R.isBoolean('somethingElse') //=> false
 * @category Guard
 */
declare function isBoolean<T>(data: T | boolean): data is NarrowedTo<T, boolean>;

export { isBoolean };