Reason · Reason lets you write simple, fast and quality type safe code while leveraging both the JavaScript & OCaml ecosystems.

sig
 val fprintf :
  Stdlib.out_channel -> ('a, Stdlib.out_channel, unit) Stdlib.format -> 'a
 val printf : ('a, Stdlib.out_channel, unit) Stdlib.format -> 'a
 val eprintf : ('a, Stdlib.out_channel, unit) Stdlib.format -> 'a
 val sprintf : ('a, unit, string) Stdlib.format -> 'a
 val bprintf :
  Stdlib.Buffer.t -> ('a, Stdlib.Buffer.t, unit) Stdlib.format -> 'a
 val ifprintf : 'b -> ('a, 'b, 'c, unit) Stdlib.format4 -> 'a
 val ibprintf :
  Stdlib.Buffer.t -> ('a, Stdlib.Buffer.t, unit) Stdlib.format -> 'a
 val kfprintf :
  (Stdlib.out_channel -> 'd) ->
  Stdlib.out_channel ->
  ('a, Stdlib.out_channel, unit, 'd) Stdlib.format4 -> 'a
 val ikfprintf : ('b -> 'd) -> 'b -> ('a, 'b, 'c, 'd) Stdlib.format4 -> 'a
 val ksprintf :
  (string -> 'd) -> ('a, unit, string, 'd) Stdlib.format4 -> 'a
 val kbprintf :
  (Stdlib.Buffer.t -> 'd) ->
  Stdlib.Buffer.t -> ('a, Stdlib.Buffer.t, unit, 'd) Stdlib.format4 -> 'a
 val ikbprintf :
  (Stdlib.Buffer.t -> 'd) ->
  Stdlib.Buffer.t -> ('a, Stdlib.Buffer.t, unit, 'd) Stdlib.format4 -> 'a
 val kprintf : (string -> 'b) -> ('a, unit, string, 'b) Stdlib.format4 -> 'a
end