(*  Title:      Pure/ML-Systems/polyml.ML

Compatibility wrapper for Poly/ML 5.3.0.

*)

use "ML-Systems/unsynchronized.ML";

open Thread;

structure ML_Name_Space =

struct

  open PolyML.NameSpace;

  type T = PolyML.NameSpace.nameSpace;

  val global = PolyML.globalNameSpace;

end;

fun reraise exn =

  (case PolyML.exceptionLocation exn of

    NONE => raise exn

  | SOME location => PolyML.raiseWithLocation (exn, location));

use "ML-Systems/polyml_common.ML";

use "ML-Systems/multithreading_polyml.ML";

val pointer_eq = PolyML.pointerEq;

fun share_common_data () = PolyML.shareCommonData PolyML.rootFunction;

use "ML-Systems/compiler_polyml-5.3.ML";

PolyML.Compiler.reportUnreferencedIds := true;

(* toplevel pretty printing *)

val pretty_ml =

  let

    fun convert len (PolyML.PrettyBlock (ind, _, context, prts)) =

          let

            fun property name default =

              (case List.find (fn PolyML.ContextProperty (a, _) => name = a | _ => false) context of

                SOME (PolyML.ContextProperty (_, b)) => b

              | NONE => default);

            val bg = property "begin" "";

            val en = property "end" "";

            val len' = property "length" len;

          in ML_Pretty.Block ((bg, en), map (convert len') prts, ind) end

      | convert len (PolyML.PrettyString s) =

          ML_Pretty.String (s, case Int.fromString len of SOME i => i | NONE => size s)

      | convert _ (PolyML.PrettyBreak (wd, _)) =

          ML_Pretty.Break (if wd < 99999 then (false, wd) else (true, 2));

  in convert "" end;

fun ml_pretty (ML_Pretty.Block ((bg, en), prts, ind)) =

      let val context =

        (if bg = "" then [] else [PolyML.ContextProperty ("begin", bg)]) @

        (if en = "" then [] else [PolyML.ContextProperty ("end", en)])

      in PolyML.PrettyBlock (ind, false, context, map ml_pretty prts) end

  | ml_pretty (ML_Pretty.String (s, len)) =

      if len = size s then PolyML.PrettyString s

      else PolyML.PrettyBlock

        (0, false, [PolyML.ContextProperty ("length", Int.toString len)], [PolyML.PrettyString s])

  | ml_pretty (ML_Pretty.Break (false, wd)) = PolyML.PrettyBreak (wd, 0)

  | ml_pretty (ML_Pretty.Break (true, _)) = PolyML.PrettyBreak (99999, 0);

fun toplevel_pp context (_: string list) pp =

  use_text context (1, "pp") false

    ("PolyML.addPrettyPrinter (fn _ => fn _ => ml_pretty o Pretty.to_ML o (" ^ pp ^ "))");