export declare const dir: (name: string) => Dir

export declare const dirData: (contents: DirContents) => DirData

export declare const file: (name: string, lines: string[]) => File

export declare const fileData: (lines: string[]) => FileData

export declare const asDir: (fso: FsObj) => Option<Dir>

export declare const asFile: (fso: FsObj) => Option<File>

export declare const match: <Z>(
  onDir: (dir: Dir) => Z,
  onFile: (File: Tag<'File', Name & Pick<Tag<'FileData', { lines: string[] }>, 'lines'>>) => Z
) => (fso: FsObj) => Z

export type Dir = Tag<'Dir', Name & OmitTag<DirData>>

export type DirContents = Record<string, FsObjData>

export type DirData = Tag<'DirData', { contents: ReadonlyRecord<string, FsObjData> }>

export type File = Tag<'File', Name & OmitTag<FileData>>

export type FileData = Tag<'FileData', { lines: string[] }>

export type FsObj = File | Dir

export type FsObjData = FileData | DirData

export type Name = { name: string }

export declare const lookup: (name: string) => (dir: DirData) => Option<FsObjData>