class type compl_in_channel =object..end
method really_input : Bytes.t -> int -> int -> unitint
 argument specifies. The octets are placed at the position denoted
 by the first int argument into the string.
 When the end of the channel is reached before the passed number of
 octets are read, the exception End_of_file is raised.
method really_input_string : int -> stringreally_input_string ic len reads len characters from channel ic
        and returns them in a new string.
        Raise End_of_file if the end of file is reached before len
        characters have been read.method input_char : unit -> charEnd_of_filemethod input_line : unit -> stringinput_line is called, the exception End_of_file
 is raised.method input_byte : unit -> intEnd_of_file