Utilities for printing debug messages.
val eprint : string -> unit
eprint message prints to stderr message, followed by a newline and flush. This is the same as prerr_endline.
val eprints : string -> 'a -> ('a -> Sexplib.Sexp.t) -> unit
eprints message a sexp_of_a prints to stderr message and a as a sexp, followed by a newline and flush.
val eprintf : ('r, unit, string, unit) format4 -> 'r
eprintf message arg1 ... argn prints to stderr message, with sprintf-style format characters instantiated, followed by a newline and flush.
module Make : 
functor (M : sig .. end) -> sig .. end
Debug.Make produces a debug function used to wrap a function to display arguments before calling and display results after returning. Intended usage is:
      module Foo = struct
        type t = ...
        let invariant = ...
        let bar t x y : Result.t = ...
      end
      module Foo_debug = struct
        open Foo
        include Debug.Make ()
        let debug x = debug invariant ~module_name:"Foo" x
        let bar t x y =
          debug "bar" [t] (t, x, y) <:sexp_of< t * X.t * Y.t >> <:sexp_of< Result.t >>
            (fun () -> bar t x y)
      end
val check_invariant : bool ref
val show_messages : bool ref
val debug : 't Invariant.t ->
module_name:string ->
string ->
't list ->
'args ->
('args -> Sexplib.Sexp.t) ->
('result -> Sexplib.Sexp.t) -> (unit -> 'result) -> 'result