import { type StaticParser, type StaticEnsure } from './static';
import { type IParser, type IProperties, type IMapping } from './parser';
export type StaticUnion<Parsers extends IParser[], Result extends unknown = never> = StaticEnsure<Parsers extends [infer Left extends IParser, ...infer Right extends IParser[]] ? StaticUnion<Right, Result | StaticParser<Left>> : Result>;
export interface IUnion<Output extends unknown = unknown> extends IParser<Output> {
    type: 'Union';
    parsers: IParser[];
}
export declare function Union<Parsers extends IParser[], Mapping extends IMapping = IMapping<StaticUnion<Parsers>>>(parsers: [...Parsers], mapping: Mapping): IUnion<ReturnType<Mapping>>;
export declare function Union<Parsers extends IParser[]>(parsers: [...Parsers]): IUnion<StaticUnion<Parsers>>;
/** True if the value is a Union parser */
export declare function IsUnion(value: unknown): value is IUnion;
export declare function ParseUnion<Context extends IProperties, Parsers extends IParser[]>(context: Context, parsers: [...Parsers], input: string): [] | [unknown, string];