sig
val fprintf :
Pervasives.out_channel -> ('a, Pervasives.out_channel, unit) format -> 'a
val printf : ('a, Pervasives.out_channel, unit) format -> 'a
val eprintf : ('a, Pervasives.out_channel, unit) format -> 'a
val sprintf : ('a, unit, string) format -> 'a
val bprintf : Buffer.t -> ('a, Buffer.t, unit) format -> 'a
end