`sig type in_channel type scanbuf = Scanf.Scanning.in_channel val stdin : Scanf.Scanning.in_channel type file_name = string val open_in : Scanf.Scanning.file_name -> Scanf.Scanning.in_channel val open_in_bin : Scanf.Scanning.file_name -> Scanf.Scanning.in_channel val close_in : Scanf.Scanning.in_channel -> unit val from_file : Scanf.Scanning.file_name -> Scanf.Scanning.in_channel val from_file_bin : string -> Scanf.Scanning.in_channel val from_string : string -> Scanf.Scanning.in_channel val from_function : (unit -> char) -> Scanf.Scanning.in_channel val from_channel : Pervasives.in_channel -> Scanf.Scanning.in_channel val end_of_input : Scanf.Scanning.in_channel -> bool val beginning_of_input : Scanf.Scanning.in_channel -> bool val name_of_input : Scanf.Scanning.in_channel -> string val stdib : Scanf.Scanning.in_channel end`