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

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 : Stdlib.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
end