import Primitive from './primitive';
import Nillable from './nillable';
import Nullable from './nullable';
import Optional from './optional';
import type { StringState, FunctionMaybe } from '../types';
declare class String<T extends string> extends Primitive<string, T, StringState<string, T>> {
    filter(value: unknown, defaultable: false, quiet: true): boolean;
    filter(value: unknown, defaultable?: boolean, quiet?: false): T;
    filter(value: unknown, defaultable?: boolean, quiet?: boolean): T | boolean;
    test(value: unknown): value is T;
    anyOf(values: string[]): String<T>;
    noneOf(values: string[]): String<T>;
    nillable(): Nillable<T>;
    nullable(): Nullable<T>;
    optional(): Optional<T>;
    length(value: number): String<T>;
    matches<U extends string>(guard: (value: string) => value is U): String<T & U>;
    matches(value: (guard: string) => boolean): String<T>;
    matches(value: RegExp): String<T>;
    max(value: FunctionMaybe<number>): String<T>;
    min(value: FunctionMaybe<number>): String<T>;
}
export default String;