import type { Identity, IMapping, IParser } from './parser';
import type { Parse } from './parse';
export interface Optional<Parser extends IParser = IParser, Mapping extends IMapping = Identity> extends IParser<Mapping> {
    type: 'Optional';
    parser: Parser;
}
export type ParseOptional<Parser extends IParser, Input extends string> = (Parse<Parser, Input> extends [infer Result extends unknown, infer Rest extends string] ? [[Result], Rest] : [[], Input]);