import { OptionalPrimitive, Primitive, Validator } from './types';
export declare function isPrimitive(value: any): value is Primitive;
export declare function isOptionalPrimitive(value: any): value is OptionalPrimitive;
export declare function isTuplePrimitive(value: any): value is [Primitive] | readonly [Primitive];
export declare function isTupleOptional(value: any): value is [OptionalPrimitive] | readonly [OptionalPrimitive];
export declare function isOptionalArray(value: any): value is [Validator, '?'] | readonly [Validator, '?'];
export declare function isObjectOptional(value: any): value is Validator & {
    '?': true;
};
export declare function isTupleBody(value: any): value is [Validator] | readonly [Validator] | [Validator, '?'] | readonly [Validator, '?'];
export declare function isUnion<T extends string>(value: any): value is [T] | string[] | readonly string[];