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Module IO (.ml)

module IO: sig .. end

For handling input from files and stdin, and output to stdout and stderr.

Input 

val string_of_file : string -> string
val string_of_stdin : unit -> string

Output 

val print_to_file : string -> string -> unit
val print_to_stdout : string -> unit
val print_to_stderr : string -> unit
val print_to_stderr_red : string -> unit
val print_to_stderr_green : string -> unit
val print_to_stderr_yellow : string -> unit