import { Arbitrary } from './definition/Arbitrary';
/**
 * Constraints to be applied on `fc.falsy()`
 */
export interface FalsyContraints {
    withBigInt?: boolean;
}
/**
 * Typing for values generated by `fc.falsy()`
 */
export declare type FalsyType<TConstraints extends FalsyContraints = {}> = false | null | 0 | '' | typeof NaN | undefined | (TConstraints extends {
    withBigInt: true;
} ? 0n : never);
/**
 * For falsy values:
 * - ''
 * - 0
 * - NaN
 * - false
 * - null
 * - undefined
 * - 0n (whenever withBigInt: true)
 *
 * @param constraints
 */
declare function falsy<TConstraints extends FalsyContraints>(constraints?: TConstraints): Arbitrary<FalsyType<TConstraints>>;
export { falsy };