Owi.Formattype formatter = Format.formatterval pp_nothing : formatter -> unit -> unitval pp_space : formatter -> unit -> unitval pp_bool : formatter -> bool -> unitval pp_char : formatter -> char -> unitval pp_int : formatter -> int -> unitval pp_flush : formatter -> unit -> unitval pp_string : formatter -> string -> unitval pp_newline : formatter -> unit -> unitval sprintf : ('a, unit, string) format -> 'aval ksprintf : (string -> 'a) -> ('b, unit, string, 'a) format4 -> 'b