src/Pure/Isar/code.ML
author haftmann
Thu Oct 04 19:41:51 2007 +0200 (2007-10-04 ago)
changeset 24837 cacc5744be75
parent 24731 c25aa6ae64ec
child 24844 98c006a30218
permissions -rw-r--r--
clarified terminology
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(*  Title:      Pure/Isar/code.ML
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    ID:         $Id$
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    Author:     Florian Haftmann, TU Muenchen
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Abstract executable content of theory.  Management of data dependent on
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executable content.
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*)
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signature CODE =
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sig
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  val add_func: thm -> theory -> theory
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  val add_liberal_func: thm -> theory -> theory
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  val add_default_func: thm -> theory -> theory
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  val add_default_func_attr: Attrib.src
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  val del_func: thm -> theory -> theory
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  val add_funcl: string * thm list Susp.T -> theory -> theory
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  val add_inline: thm -> theory -> theory
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  val del_inline: thm -> theory -> theory
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  val add_inline_proc: string * (theory -> cterm list -> thm list) -> theory -> theory
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  val del_inline_proc: string -> theory -> theory
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  val add_preproc: string * (theory -> thm list -> thm list) -> theory -> theory
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  val del_preproc: string -> theory -> theory
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  val add_post: thm -> theory -> theory
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  val del_post: thm -> theory -> theory
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  val add_datatype: (string * typ) list -> theory -> theory
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  val add_datatype_cmd: string list -> theory -> theory
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  val coregular_algebra: theory -> Sorts.algebra
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  val operational_algebra: theory -> (sort -> sort) * Sorts.algebra
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  val these_funcs: theory -> string -> thm list
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  val get_datatype: theory -> string -> ((string * sort) list * (string * typ list) list)
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  val get_datatype_of_constr: theory -> string -> string option
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  val default_typ: theory -> string -> typ
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  val preprocess_conv: cterm -> thm
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  val preprocess_term: theory -> term -> term
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  val postprocess_conv: cterm -> thm
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  val postprocess_term: theory -> term -> term
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  val add_attribute: string * (Args.T list -> attribute * Args.T list) -> theory -> theory
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  val print_codesetup: theory -> unit
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end;
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signature CODE_DATA_ARGS =
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sig
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  type T
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  val empty: T
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  val merge: Pretty.pp -> T * T -> T
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  val purge: theory option -> string list option -> T -> T
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end;
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signature CODE_DATA =
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sig
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  type T
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  val get: theory -> T
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  val change: theory -> (T -> T) -> T
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  val change_yield: theory -> (T -> 'a * T) -> 'a * T
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end;
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signature PRIVATE_CODE =
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sig
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  include CODE
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  val declare_data: Object.T -> (Pretty.pp -> Object.T * Object.T -> Object.T)
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    -> (theory option -> string list option -> Object.T -> Object.T) -> serial
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  val get_data: serial * ('a -> Object.T) * (Object.T -> 'a)
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    -> theory -> 'a
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  val change_data: serial * ('a -> Object.T) * (Object.T -> 'a)
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    -> theory -> ('a -> 'a) -> 'a
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  val change_yield_data: serial * ('a -> Object.T) * (Object.T -> 'a)
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    -> theory -> ('a -> 'b * 'a) -> 'b * 'a
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end;
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structure Code : PRIVATE_CODE =
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struct
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(** preliminaries **)
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(* certificate theorems *)
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fun string_of_lthms r = case Susp.peek r
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 of SOME thms => (map string_of_thm o rev) thms
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  | NONE => ["[...]"];
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fun pretty_lthms ctxt r = case Susp.peek r
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 of SOME thms => map (ProofContext.pretty_thm ctxt) thms
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  | NONE => [Pretty.str "[...]"];
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fun certificate thy f r =
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  case Susp.peek r
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   of SOME thms => (Susp.value o f thy) thms
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     | NONE => let
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          val thy_ref = Theory.check_thy thy;
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        in Susp.delay (fn () => (f (Theory.deref thy_ref) o Susp.force) r) end;
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fun merge' _ ([], []) = (false, [])
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  | merge' _ ([], ys) = (true, ys)
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  | merge' eq (xs, ys) = fold_rev
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      (fn y => fn (t, xs) => (t orelse not (member eq xs y), insert eq y xs)) ys (false, xs);
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fun merge_alist eq_key eq (xys as (xs, ys)) =
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  if eq_list (eq_pair eq_key eq) (xs, ys)
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  then (false, xs)
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  else (true, AList.merge eq_key eq xys);
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val merge_thms = merge' Thm.eq_thm_prop;
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fun merge_lthms (r1, r2) =
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  if Susp.same (r1, r2)
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    then (false, r1)
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  else case Susp.peek r1
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   of SOME [] => (true, r2)
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    | _ => case Susp.peek r2
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       of SOME [] => (true, r1)
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        | _ => (apsnd (Susp.delay o K)) (merge_thms (Susp.force r1, Susp.force r2));
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(* pairs of (selected, deleted) defining equations *)
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type sdthms = thm list Susp.T * thm list;
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fun add_drop_redundant thm (sels, dels) =
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  let
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    val thy = Thm.theory_of_thm thm;
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    val args_of = snd o strip_comb o fst o Logic.dest_equals o Thm.plain_prop_of;
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    val args = args_of thm;
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    fun matches [] _ = true
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      | matches (Var _ :: xs) [] = matches xs []
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      | matches (_ :: _) [] = false
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      | matches (x :: xs) (y :: ys) = Pattern.matches thy (x, y) andalso matches xs ys;
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    fun drop thm' = not (matches args (args_of thm'))
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      orelse (warning ("code generator: dropping redundant defining equation\n" ^ string_of_thm thm'); false);
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    val (keeps, drops) = List.partition drop sels;
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  in (thm :: keeps, dels |> remove Thm.eq_thm_prop thm |> fold (insert Thm.eq_thm_prop) drops) end;
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fun add_thm thm (sels, dels) =
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  apfst Susp.value (add_drop_redundant thm (Susp.force sels, dels));
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fun add_lthms lthms (sels, []) =
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      (Susp.delay (fn () => fold add_drop_redundant
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        (Susp.force lthms) (Susp.force sels, []) |> fst), [])
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        (*FIXME*)
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  | add_lthms lthms (sels, dels) =
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      fold add_thm (Susp.force lthms) (sels, dels);
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fun del_thm thm (sels, dels) =
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  (Susp.value (remove Thm.eq_thm_prop thm (Susp.force sels)), thm :: dels);
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fun pretty_sdthms ctxt (sels, _) = pretty_lthms ctxt sels;
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fun merge_sdthms ((sels1, dels1), (sels2, dels2)) =
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  let
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    val (dels_t, dels) = merge_thms (dels1, dels2);
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  in if dels_t
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    then let
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      val (_, sels) = merge_thms
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        (subtract Thm.eq_thm_prop dels2 (Susp.force sels1), Susp.force sels2);
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      val (_, dels) = merge_thms
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        (subtract Thm.eq_thm_prop (Susp.force sels2) dels1, dels2);
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    in (true, ((Susp.delay o K) sels, dels)) end
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    else let
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      val (sels_t, sels) = merge_lthms (sels1, sels2);
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    in (sels_t, (sels, dels)) end
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  end;
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(* code attributes *)
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structure CodeAttr = TheoryDataFun (
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  type T = (string * (Args.T list -> attribute * Args.T list)) list;
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  val empty = [];
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  val copy = I;
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  val extend = I;
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  fun merge _ = AList.merge (op =) (K true);
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);
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fun add_attribute (attr as (name, _)) =
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  let
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    fun add_parser ("", parser) attrs = attrs @ [("", parser)]
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      | add_parser (name, parser) attrs = (name, Args.$$$ name |-- parser) :: attrs;
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    fun error "" = error ("Code attribute already declared")
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      | error name = error ("Code attribute " ^ name ^ " already declared")
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  in CodeAttr.map (fn attrs => if AList.defined (op =) attrs name
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    then error name else add_parser attr attrs)
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  end;
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val _ =
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  let
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    val code_attr = Attrib.syntax (Scan.peek (fn context =>
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      List.foldr op || Scan.fail (map snd (CodeAttr.get (Context.theory_of context)))));
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  in
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    Context.add_setup (Attrib.add_attributes
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      [("code", code_attr, "declare theorems for code generation")])
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  end;
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(** exeuctable content **)
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datatype thmproc = Preproc of {
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  inlines: thm list,
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  inline_procs: (string * (serial * (theory -> cterm list -> thm list))) list,
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  preprocs: (string * (serial * (theory -> thm list -> thm list))) list,
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  posts: thm list
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};
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fun mk_thmproc (((inlines, inline_procs), preprocs), posts) =
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  Preproc { inlines = inlines, inline_procs = inline_procs, preprocs = preprocs,
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    posts = posts };
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fun map_thmproc f (Preproc { inlines, inline_procs, preprocs, posts }) =
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  mk_thmproc (f (((inlines, inline_procs), preprocs), posts));
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fun merge_thmproc (Preproc { inlines = inlines1, inline_procs = inline_procs1,
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    preprocs = preprocs1, posts = posts1 },
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  Preproc { inlines = inlines2, inline_procs = inline_procs2,
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      preprocs = preprocs2, posts= posts2 }) =
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    let
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      val (touched1, inlines) = merge_thms (inlines1, inlines2);
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      val (touched2, inline_procs) = merge_alist (op =) (eq_fst (op =)) (inline_procs1, inline_procs2);
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      val (touched3, preprocs) = merge_alist (op =) (eq_fst (op =)) (preprocs1, preprocs2);
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      val (_, posts) = merge_thms (posts1, posts2);
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    in (touched1 orelse touched2 orelse touched3,
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      mk_thmproc (((inlines, inline_procs), preprocs), posts)) end;
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fun join_func_thms (tabs as (tab1, tab2)) =
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  let
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    val cs1 = Symtab.keys tab1;
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    val cs2 = Symtab.keys tab2;
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    val cs' = filter (member (op =) cs2) cs1;
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    val cs'' = subtract (op =) cs' cs1 @ subtract (op =) cs' cs2;
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    val cs''' = ref [] : string list ref;
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    fun merge c x = let val (touched, thms') = merge_sdthms x in
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      (if touched then cs''' := cons c (!cs''') else (); thms') end;
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  in (cs'' @ !cs''', Symtab.join merge tabs) end;
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fun merge_funcs (thms1, thms2) =
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  let
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    val (consts, thms) = join_func_thms (thms1, thms2);
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  in (SOME consts, thms) end;
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val eq_string = op = : string * string -> bool;
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fun eq_dtyp ((vs1, cs1), (vs2, cs2)) = 
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  gen_eq_set (eq_pair eq_string (gen_eq_set eq_string)) (vs1, vs2)
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    andalso gen_eq_set (eq_fst eq_string) (cs1, cs2);
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fun merge_dtyps (tabs as (tab1, tab2)) =
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  let
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    val tycos1 = Symtab.keys tab1;
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    val tycos2 = Symtab.keys tab2;
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    val tycos' = filter (member eq_string tycos2) tycos1;
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    val new_types = not (gen_eq_set (op =) (tycos1, tycos2));
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    val diff_types = not (gen_eq_set (eq_pair (op =) eq_dtyp)
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      (AList.make (the o Symtab.lookup tab1) tycos',
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       AList.make (the o Symtab.lookup tab2) tycos'));
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    fun join _ (cos as (_, cos2)) = if eq_dtyp cos
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      then raise Symtab.SAME else cos2;
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  in ((new_types, diff_types), Symtab.join join tabs) end;
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datatype spec = Spec of {
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  funcs: sdthms Symtab.table,
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  dtyps: ((string * sort) list * (string * typ list) list) Symtab.table
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};
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fun mk_spec (funcs, dtyps) =
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  Spec { funcs = funcs, dtyps = dtyps };
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fun map_spec f (Spec { funcs = funcs, dtyps = dtyps }) =
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  mk_spec (f (funcs, dtyps));
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fun merge_spec (Spec { funcs = funcs1, dtyps = dtyps1 },
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  Spec { funcs = funcs2, dtyps = dtyps2 }) =
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  let
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    val (touched_cs, funcs) = merge_funcs (funcs1, funcs2);
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    val ((new_types, diff_types), dtyps) = merge_dtyps (dtyps1, dtyps2);
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    val touched = if new_types orelse diff_types then NONE else touched_cs;
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  in (touched, mk_spec (funcs, dtyps)) end;
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datatype exec = Exec of {
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  thmproc: thmproc,
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  spec: spec
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};
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fun mk_exec (thmproc, spec) =
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  Exec { thmproc = thmproc, spec = spec };
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fun map_exec f (Exec { thmproc = thmproc, spec = spec }) =
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  mk_exec (f (thmproc, spec));
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fun merge_exec (Exec { thmproc = thmproc1, spec = spec1 },
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  Exec { thmproc = thmproc2, spec = spec2 }) =
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  let
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    val (touched', thmproc) = merge_thmproc (thmproc1, thmproc2);
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    val (touched_cs, spec) = merge_spec (spec1, spec2);
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    val touched = if touched' then NONE else touched_cs;
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  in (touched, mk_exec (thmproc, spec)) end;
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val empty_exec = mk_exec (mk_thmproc ((([], []), []), []),
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  mk_spec (Symtab.empty, Symtab.empty));
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fun the_thmproc (Exec { thmproc = Preproc x, ...}) = x;
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fun the_spec (Exec { spec = Spec x, ...}) = x;
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val the_funcs = #funcs o the_spec;
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val the_dtyps = #dtyps o the_spec;
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val map_thmproc = map_exec o apfst o map_thmproc;
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val map_funcs = map_exec o apsnd o map_spec o apfst;
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val map_dtyps = map_exec o apsnd o map_spec o apsnd;
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(* data slots dependent on executable content *)
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(*private copy avoids potential conflict of table exceptions*)
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structure Datatab = TableFun(type key = int val ord = int_ord);
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local
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type kind = {
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  empty: Object.T,
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  merge: Pretty.pp -> Object.T * Object.T -> Object.T,
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  purge: theory option -> string list option -> Object.T -> Object.T
haftmann@24219
   312
};
haftmann@24219
   313
haftmann@24219
   314
val kinds = ref (Datatab.empty: kind Datatab.table);
haftmann@24219
   315
val kind_keys = ref ([]: serial list);
haftmann@24219
   316
haftmann@24219
   317
fun invoke f k = case Datatab.lookup (! kinds) k
haftmann@24219
   318
 of SOME kind => f kind
haftmann@24219
   319
  | NONE => sys_error "Invalid code data identifier";
haftmann@24219
   320
haftmann@24219
   321
in
haftmann@24219
   322
haftmann@24219
   323
fun declare_data empty merge purge =
haftmann@24219
   324
  let
haftmann@24219
   325
    val k = serial ();
haftmann@24219
   326
    val kind = {empty = empty, merge = merge, purge = purge};
haftmann@24219
   327
    val _ = change kinds (Datatab.update (k, kind));
haftmann@24219
   328
    val _ = change kind_keys (cons k);
haftmann@24219
   329
  in k end;
haftmann@24219
   330
haftmann@24219
   331
fun invoke_empty k = invoke (fn kind => #empty kind) k;
haftmann@24219
   332
haftmann@24219
   333
fun invoke_merge_all pp = Datatab.join
haftmann@24219
   334
  (invoke (fn kind => #merge kind pp));
haftmann@24219
   335
haftmann@24219
   336
fun invoke_purge_all thy_opt cs =
haftmann@24219
   337
  fold (fn k => Datatab.map_entry k
haftmann@24219
   338
    (invoke (fn kind => #purge kind thy_opt cs) k)) (! kind_keys);
haftmann@24219
   339
haftmann@24219
   340
end; (*local*)
haftmann@24219
   341
haftmann@24219
   342
haftmann@24219
   343
(* theory store *)
haftmann@24219
   344
haftmann@24219
   345
local
haftmann@24219
   346
haftmann@24219
   347
type data = Object.T Datatab.table;
haftmann@24219
   348
haftmann@24219
   349
structure CodeData = TheoryDataFun
haftmann@24219
   350
(
haftmann@24219
   351
  type T = exec * data ref;
haftmann@24219
   352
  val empty = (empty_exec, ref Datatab.empty : data ref);
haftmann@24219
   353
  fun copy (exec, data) = (exec, ref (! data));
haftmann@24219
   354
  val extend = copy;
haftmann@24219
   355
  fun merge pp ((exec1, data1), (exec2, data2)) =
haftmann@24219
   356
    let
haftmann@24219
   357
      val (touched, exec) = merge_exec (exec1, exec2);
haftmann@24219
   358
      val data1' = invoke_purge_all NONE touched (! data1);
haftmann@24219
   359
      val data2' = invoke_purge_all NONE touched (! data2);
haftmann@24219
   360
      val data = invoke_merge_all pp (data1', data2');
haftmann@24219
   361
    in (exec, ref data) end;
haftmann@24219
   362
);
haftmann@24219
   363
haftmann@24219
   364
val _ = Context.add_setup CodeData.init;
haftmann@24219
   365
haftmann@24219
   366
fun ch r f = let val x = f (! r) in (r := x; x) end;
haftmann@24219
   367
fun thy_data f thy = f ((snd o CodeData.get) thy);
haftmann@24219
   368
haftmann@24219
   369
fun get_ensure_init kind data_ref =
haftmann@24219
   370
  case Datatab.lookup (! data_ref) kind
haftmann@24219
   371
   of SOME x => x
haftmann@24219
   372
    | NONE => let val y = invoke_empty kind
haftmann@24219
   373
        in (change data_ref (Datatab.update (kind, y)); y) end;
haftmann@24219
   374
haftmann@24219
   375
in
haftmann@24219
   376
haftmann@24219
   377
(* access to executable content *)
haftmann@24219
   378
haftmann@24219
   379
val get_exec = fst o CodeData.get;
haftmann@24219
   380
haftmann@24219
   381
fun map_exec_purge touched f thy =
haftmann@24219
   382
  CodeData.map (fn (exec, data) => 
haftmann@24219
   383
    (f exec, ref (invoke_purge_all (SOME thy) touched (! data)))) thy;
haftmann@24219
   384
haftmann@24219
   385
haftmann@24219
   386
(* access to data dependent on abstract executable content *)
haftmann@24219
   387
haftmann@24219
   388
fun get_data (kind, _, dest) = thy_data (get_ensure_init kind #> dest);
haftmann@24219
   389
haftmann@24219
   390
fun change_data (kind, mk, dest) =
haftmann@24219
   391
  let
haftmann@24219
   392
    fun chnge data_ref f =
haftmann@24219
   393
      let
haftmann@24219
   394
        val data = get_ensure_init kind data_ref;
haftmann@24219
   395
        val data' = f (dest data);
haftmann@24219
   396
      in (change data_ref (Datatab.update (kind, mk data')); data') end;
haftmann@24219
   397
  in thy_data chnge end;
haftmann@24219
   398
haftmann@24219
   399
fun change_yield_data (kind, mk, dest) =
haftmann@24219
   400
  let
haftmann@24219
   401
    fun chnge data_ref f =
haftmann@24219
   402
      let
haftmann@24219
   403
        val data = get_ensure_init kind data_ref;
haftmann@24219
   404
        val (x, data') = f (dest data);
haftmann@24219
   405
      in (x, (change data_ref (Datatab.update (kind, mk data')); data')) end;
haftmann@24219
   406
  in thy_data chnge end;
haftmann@24219
   407
haftmann@24219
   408
end; (*local*)
haftmann@24219
   409
haftmann@24219
   410
haftmann@24219
   411
(* print executable content *)
haftmann@24219
   412
haftmann@24219
   413
fun print_codesetup thy =
haftmann@24219
   414
  let
haftmann@24219
   415
    val ctxt = ProofContext.init thy;
haftmann@24219
   416
    val exec = get_exec thy;
haftmann@24219
   417
    fun pretty_func (s, lthms) =
haftmann@24219
   418
      (Pretty.block o Pretty.fbreaks) (
haftmann@24219
   419
        Pretty.str s :: pretty_sdthms ctxt lthms
haftmann@24219
   420
      );
haftmann@24219
   421
    fun pretty_dtyp (s, []) =
haftmann@24219
   422
          Pretty.str s
haftmann@24219
   423
      | pretty_dtyp (s, cos) =
haftmann@24219
   424
          (Pretty.block o Pretty.breaks) (
haftmann@24219
   425
            Pretty.str s
haftmann@24219
   426
            :: Pretty.str "="
haftmann@24219
   427
            :: separate (Pretty.str "|") (map (fn (c, []) => Pretty.str c
haftmann@24219
   428
                 | (c, tys) =>
haftmann@24219
   429
                     (Pretty.block o Pretty.breaks)
haftmann@24423
   430
                        (Pretty.str (CodeUnit.string_of_const thy c)
haftmann@24423
   431
                          :: Pretty.str "of" :: map (Pretty.quote o Sign.pretty_typ thy) tys)) cos)
haftmann@24219
   432
          );
haftmann@24219
   433
    val inlines = (#inlines o the_thmproc) exec;
haftmann@24219
   434
    val inline_procs = (map fst o #inline_procs o the_thmproc) exec;
haftmann@24219
   435
    val preprocs = (map fst o #preprocs o the_thmproc) exec;
haftmann@24219
   436
    val funs = the_funcs exec
haftmann@24423
   437
      |> Symtab.dest
haftmann@24219
   438
      |> (map o apfst) (CodeUnit.string_of_const thy)
haftmann@24219
   439
      |> sort (string_ord o pairself fst);
haftmann@24219
   440
    val dtyps = the_dtyps exec
haftmann@24219
   441
      |> Symtab.dest
haftmann@24219
   442
      |> map (fn (dtco, (vs, cos)) => (Sign.string_of_typ thy (Type (dtco, map TFree vs)), cos))
haftmann@24219
   443
      |> sort (string_ord o pairself fst)
haftmann@24219
   444
  in
haftmann@24219
   445
    (Pretty.writeln o Pretty.chunks) [
haftmann@24219
   446
      Pretty.block (
haftmann@24219
   447
        Pretty.str "defining equations:"
haftmann@24219
   448
        :: Pretty.fbrk
haftmann@24219
   449
        :: (Pretty.fbreaks o map pretty_func) funs
haftmann@24219
   450
      ),
haftmann@24219
   451
      Pretty.block (
haftmann@24219
   452
        Pretty.str "inlining theorems:"
haftmann@24219
   453
        :: Pretty.fbrk
haftmann@24219
   454
        :: (Pretty.fbreaks o map (ProofContext.pretty_thm ctxt)) inlines
haftmann@24219
   455
      ),
haftmann@24219
   456
      Pretty.block (
haftmann@24219
   457
        Pretty.str "inlining procedures:"
haftmann@24219
   458
        :: Pretty.fbrk
haftmann@24219
   459
        :: (Pretty.fbreaks o map Pretty.str) inline_procs
haftmann@24219
   460
      ),
haftmann@24219
   461
      Pretty.block (
haftmann@24219
   462
        Pretty.str "preprocessors:"
haftmann@24219
   463
        :: Pretty.fbrk
haftmann@24219
   464
        :: (Pretty.fbreaks o map Pretty.str) preprocs
haftmann@24219
   465
      ),
haftmann@24219
   466
      Pretty.block (
haftmann@24219
   467
        Pretty.str "datatypes:"
haftmann@24219
   468
        :: Pretty.fbrk
haftmann@24219
   469
        :: (Pretty.fbreaks o map pretty_dtyp) dtyps
haftmann@24219
   470
      )
haftmann@24219
   471
    ]
haftmann@24219
   472
  end;
haftmann@24219
   473
haftmann@24219
   474
haftmann@24219
   475
haftmann@24219
   476
(** theorem transformation and certification **)
haftmann@24219
   477
haftmann@24219
   478
fun common_typ_funcs [] = []
haftmann@24219
   479
  | common_typ_funcs [thm] = [thm]
haftmann@24219
   480
  | common_typ_funcs (thms as thm :: _) =
haftmann@24219
   481
      let
haftmann@24219
   482
        val thy = Thm.theory_of_thm thm;
haftmann@24219
   483
        fun incr_thm thm max =
haftmann@24219
   484
          let
haftmann@24219
   485
            val thm' = incr_indexes max thm;
haftmann@24219
   486
            val max' = Thm.maxidx_of thm' + 1;
haftmann@24219
   487
          in (thm', max') end;
haftmann@24219
   488
        val (thms', maxidx) = fold_map incr_thm thms 0;
haftmann@24219
   489
        val ty1 :: tys = map (snd o CodeUnit.head_func) thms';
haftmann@24219
   490
        fun unify ty env = Sign.typ_unify thy (ty1, ty) env
haftmann@24219
   491
          handle Type.TUNIFY =>
haftmann@24219
   492
            error ("Type unificaton failed, while unifying defining equations\n"
haftmann@24219
   493
            ^ (cat_lines o map Display.string_of_thm) thms
haftmann@24219
   494
            ^ "\nwith types\n"
haftmann@24219
   495
            ^ (cat_lines o map (CodeUnit.string_of_typ thy)) (ty1 :: tys));
haftmann@24219
   496
        val (env, _) = fold unify tys (Vartab.empty, maxidx)
haftmann@24219
   497
        val instT = Vartab.fold (fn (x_i, (sort, ty)) =>
haftmann@24219
   498
          cons (Thm.ctyp_of thy (TVar (x_i, sort)), Thm.ctyp_of thy ty)) env [];
haftmann@24219
   499
      in map (Thm.instantiate (instT, [])) thms' end;
haftmann@24219
   500
haftmann@24423
   501
fun const_of_func thy = Class.unoverload_const thy o CodeUnit.head_func;
haftmann@24423
   502
haftmann@24219
   503
fun certify_const thy const thms =
haftmann@24219
   504
  let
haftmann@24423
   505
    fun cert thm = if const = const_of_func thy thm
haftmann@24219
   506
      then thm else error ("Wrong head of defining equation,\nexpected constant "
haftmann@24219
   507
        ^ CodeUnit.string_of_const thy const ^ "\n" ^ string_of_thm thm)
haftmann@24219
   508
  in map cert thms end;
haftmann@24219
   509
haftmann@24219
   510
haftmann@24219
   511
haftmann@24219
   512
(** operational sort algebra and class discipline **)
haftmann@24219
   513
haftmann@24219
   514
local
haftmann@24219
   515
haftmann@24219
   516
fun aggr_neutr f y [] = y
haftmann@24219
   517
  | aggr_neutr f y (x::xs) = aggr_neutr f (f y x) xs;
haftmann@24219
   518
haftmann@24219
   519
fun aggregate f [] = NONE
haftmann@24219
   520
  | aggregate f (x::xs) = SOME (aggr_neutr f x xs);
haftmann@24219
   521
haftmann@24219
   522
fun inter_sorts thy =
haftmann@24219
   523
  let
haftmann@24219
   524
    val algebra = Sign.classes_of thy;
haftmann@24219
   525
    val inters = curry (Sorts.inter_sort algebra);
haftmann@24219
   526
  in aggregate (map2 inters) end;
haftmann@24219
   527
haftmann@24219
   528
fun specific_constraints thy (class, tyco) =
haftmann@24219
   529
  let
haftmann@24219
   530
    val vs = Name.invents Name.context "" (Sign.arity_number thy tyco);
haftmann@24837
   531
    val classparams = (map fst o these o Option.map snd
haftmann@24423
   532
      o try (AxClass.params_of_class thy)) class;
haftmann@24837
   533
    val funcs = classparams
haftmann@24423
   534
      |> map (fn c => Class.inst_const thy (c, tyco))
haftmann@24423
   535
      |> map (Symtab.lookup ((the_funcs o get_exec) thy))
haftmann@24219
   536
      |> (map o Option.map) (Susp.force o fst)
haftmann@24219
   537
      |> maps these
haftmann@24423
   538
      |> map (Thm.transfer thy)
haftmann@24423
   539
    fun sorts_of [Type (_, tys)] = map (snd o dest_TVar) tys
haftmann@24423
   540
      | sorts_of tys = map (snd o dest_TVar) tys;
haftmann@24423
   541
    val sorts = map (sorts_of o Sign.const_typargs thy o CodeUnit.head_func) funcs;
haftmann@24219
   542
  in sorts end;
haftmann@24219
   543
haftmann@24219
   544
fun weakest_constraints thy (class, tyco) =
haftmann@24219
   545
  let
wenzelm@24731
   546
    val all_superclasses = Sign.complete_sort thy [class];
haftmann@24219
   547
  in case inter_sorts thy (maps (fn class => specific_constraints thy (class, tyco)) all_superclasses)
haftmann@24219
   548
   of SOME sorts => sorts
haftmann@24219
   549
    | NONE => Sign.arity_sorts thy tyco [class]
haftmann@24219
   550
  end;
haftmann@24219
   551
haftmann@24219
   552
fun strongest_constraints thy (class, tyco) =
haftmann@24219
   553
  let
haftmann@24219
   554
    val algebra = Sign.classes_of thy;
haftmann@24219
   555
    val all_subclasses = class :: Graph.all_preds ((#classes o Sorts.rep_algebra) algebra) [class];
haftmann@24219
   556
    val inst_subclasses = filter (can (Sorts.mg_domain algebra tyco) o single) all_subclasses;
haftmann@24219
   557
  in case inter_sorts thy (maps (fn class => specific_constraints thy (class, tyco)) inst_subclasses)
haftmann@24219
   558
   of SOME sorts => sorts
haftmann@24219
   559
    | NONE => replicate
wenzelm@24731
   560
        (Sign.arity_number thy tyco) (Sign.minimize_sort thy (Sign.all_classes thy))
haftmann@24219
   561
  end;
haftmann@24219
   562
haftmann@24837
   563
fun gen_classparam_typ constr thy class (c, tyco) = 
haftmann@24219
   564
  let
haftmann@24219
   565
    val (var, cs) = try (AxClass.params_of_class thy) class |> the_default ("'a", [])
haftmann@24219
   566
    val ty = (the o AList.lookup (op =) cs) c;
haftmann@24219
   567
    val sort_args = Name.names (Name.declare var Name.context) "'a"
haftmann@24219
   568
      (constr thy (class, tyco));
haftmann@24219
   569
    val ty_inst = Type (tyco, map TFree sort_args);
haftmann@24219
   570
  in Logic.varifyT (map_type_tfree (K ty_inst) ty) end;
haftmann@24219
   571
haftmann@24219
   572
fun retrieve_algebra thy operational =
haftmann@24219
   573
  Sorts.subalgebra (Sign.pp thy) operational
haftmann@24219
   574
    (weakest_constraints thy)
haftmann@24219
   575
    (Sign.classes_of thy);
haftmann@24219
   576
haftmann@24219
   577
in
haftmann@24219
   578
haftmann@24219
   579
fun coregular_algebra thy = retrieve_algebra thy (K true) |> snd;
haftmann@24219
   580
fun operational_algebra thy =
haftmann@24219
   581
  let
haftmann@24219
   582
    fun add_iff_operational class =
haftmann@24219
   583
      can (AxClass.get_definition thy) class ? cons class;
haftmann@24219
   584
    val operational_classes = fold add_iff_operational (Sign.all_classes thy) []
haftmann@24219
   585
  in retrieve_algebra thy (member (op =) operational_classes) end;
haftmann@24219
   586
haftmann@24837
   587
val classparam_weakest_typ = gen_classparam_typ weakest_constraints;
haftmann@24837
   588
val classparam_strongest_typ = gen_classparam_typ strongest_constraints;
haftmann@24219
   589
haftmann@24219
   590
fun assert_func_typ thm =
haftmann@24219
   591
  let
haftmann@24219
   592
    val thy = Thm.theory_of_thm thm;
haftmann@24837
   593
    fun check_typ_classparam tyco (c, thm) =
haftmann@24219
   594
          let
haftmann@24423
   595
            val SOME class = AxClass.class_of_param thy c;
haftmann@24219
   596
            val (_, ty) = CodeUnit.head_func thm;
haftmann@24837
   597
            val ty_decl = classparam_weakest_typ thy class (c, tyco);
haftmann@24837
   598
            val ty_strongest = classparam_strongest_typ thy class (c, tyco);
haftmann@24219
   599
            fun constrain thm = 
haftmann@24219
   600
              let
haftmann@24219
   601
                val max = Thm.maxidx_of thm + 1;
haftmann@24219
   602
                val ty_decl' = Logic.incr_tvar max ty_decl;
haftmann@24219
   603
                val (_, ty') = CodeUnit.head_func thm;
haftmann@24219
   604
                val (env, _) = Sign.typ_unify thy (ty_decl', ty') (Vartab.empty, max);
haftmann@24219
   605
                val instT = Vartab.fold (fn (x_i, (sort, ty)) =>
haftmann@24219
   606
                  cons (Thm.ctyp_of thy (TVar (x_i, sort)), Thm.ctyp_of thy ty)) env [];
haftmann@24219
   607
              in Thm.instantiate (instT, []) thm end;
haftmann@24219
   608
          in if Sign.typ_instance thy (ty_strongest, ty)
haftmann@24219
   609
            then if Sign.typ_instance thy (ty, ty_decl)
haftmann@24219
   610
            then thm
haftmann@24219
   611
            else (warning ("Constraining type\n" ^ CodeUnit.string_of_typ thy ty
haftmann@24219
   612
              ^ "\nof defining equation\n"
haftmann@24219
   613
              ^ string_of_thm thm
haftmann@24219
   614
              ^ "\nto permitted most general type\n"
haftmann@24219
   615
              ^ CodeUnit.string_of_typ thy ty_decl);
haftmann@24219
   616
              constrain thm)
haftmann@24219
   617
            else CodeUnit.bad_thm ("Type\n" ^ CodeUnit.string_of_typ thy ty
haftmann@24219
   618
              ^ "\nof defining equation\n"
haftmann@24219
   619
              ^ string_of_thm thm
haftmann@24219
   620
              ^ "\nis incompatible with permitted least general type\n"
haftmann@24219
   621
              ^ CodeUnit.string_of_typ thy ty_strongest)
haftmann@24423
   622
          end;
haftmann@24423
   623
    fun check_typ_fun (c, thm) =
haftmann@24219
   624
      let
haftmann@24219
   625
        val (_, ty) = CodeUnit.head_func thm;
haftmann@24219
   626
        val ty_decl = Sign.the_const_type thy c;
haftmann@24219
   627
      in if Sign.typ_equiv thy (Type.strip_sorts ty_decl, Type.strip_sorts ty)
haftmann@24219
   628
        then thm
haftmann@24219
   629
        else CodeUnit.bad_thm ("Type\n" ^ CodeUnit.string_of_typ thy ty
haftmann@24219
   630
           ^ "\nof defining equation\n"
haftmann@24219
   631
           ^ string_of_thm thm
haftmann@24219
   632
           ^ "\nis incompatible with declared function type\n"
haftmann@24219
   633
           ^ CodeUnit.string_of_typ thy ty_decl)
haftmann@24219
   634
      end;
haftmann@24423
   635
    fun check_typ (c, thm) =
haftmann@24423
   636
      case Class.param_const thy c
haftmann@24837
   637
       of SOME (c, tyco) => check_typ_classparam tyco (c, thm)
haftmann@24423
   638
        | NONE => check_typ_fun (c, thm);
haftmann@24423
   639
  in check_typ (const_of_func thy thm, thm) end;
haftmann@24219
   640
haftmann@24283
   641
val mk_func = CodeUnit.error_thm (assert_func_typ o CodeUnit.mk_func);
haftmann@24624
   642
val mk_liberal_func = CodeUnit.warning_thm (assert_func_typ o CodeUnit.mk_func);
haftmann@24624
   643
val mk_default_func = CodeUnit.try_thm (assert_func_typ o CodeUnit.mk_func);
haftmann@24219
   644
haftmann@24219
   645
end;
haftmann@24219
   646
haftmann@24219
   647
haftmann@24219
   648
haftmann@24219
   649
(** interfaces and attributes **)
haftmann@24219
   650
haftmann@24624
   651
fun delete_force msg key xs =
haftmann@24624
   652
  if AList.defined (op =) xs key then AList.delete (op =) key xs
haftmann@24624
   653
  else error ("No such " ^ msg ^ ": " ^ quote key);
haftmann@24624
   654
haftmann@24423
   655
fun get_datatype thy tyco =
haftmann@24423
   656
  case Symtab.lookup ((the_dtyps o get_exec) thy) tyco
haftmann@24423
   657
   of SOME spec => spec
haftmann@24423
   658
    | NONE => Sign.arity_number thy tyco
haftmann@24423
   659
        |> Name.invents Name.context "'a"
haftmann@24423
   660
        |> map (rpair [])
haftmann@24423
   661
        |> rpair [];
haftmann@24423
   662
haftmann@24423
   663
fun get_datatype_of_constr thy c =
haftmann@24423
   664
  case (snd o strip_type o Sign.the_const_type thy) c
haftmann@24423
   665
   of Type (tyco, _) => if member (op =)
haftmann@24423
   666
       ((the_default [] o Option.map (map fst o snd) o Symtab.lookup ((the_dtyps o get_exec) thy)) tyco) c
haftmann@24423
   667
       then SOME tyco else NONE
haftmann@24423
   668
    | _ => NONE;
haftmann@24423
   669
haftmann@24423
   670
fun get_constr_typ thy c =
haftmann@24423
   671
  case get_datatype_of_constr thy c
haftmann@24423
   672
   of SOME tyco => let
haftmann@24423
   673
          val (vs, cos) = get_datatype thy tyco;
haftmann@24423
   674
          val SOME tys = AList.lookup (op =) cos c;
haftmann@24423
   675
          val ty = tys ---> Type (tyco, map TFree vs);
haftmann@24423
   676
        in SOME (Logic.varifyT ty) end
haftmann@24423
   677
    | NONE => NONE;
haftmann@24423
   678
haftmann@24624
   679
fun add_func thm thy =
haftmann@24624
   680
  let
haftmann@24624
   681
    val func = mk_func thm;
haftmann@24624
   682
    val c = const_of_func thy func;
haftmann@24624
   683
    val _ = if (is_some o AxClass.class_of_param thy) c
haftmann@24624
   684
      then error ("Rejected polymorphic equation for overloaded constant:\n"
haftmann@24624
   685
        ^ string_of_thm thm)
haftmann@24624
   686
      else ();
haftmann@24624
   687
    val _ = if (is_some o get_datatype_of_constr thy) c
haftmann@24624
   688
      then error ("Rejected equation for datatype constructor:\n"
haftmann@24624
   689
        ^ string_of_thm func)
haftmann@24624
   690
      else ();
haftmann@24624
   691
  in
haftmann@24624
   692
    (map_exec_purge (SOME [c]) o map_funcs) (Symtab.map_default
haftmann@24624
   693
      (c, (Susp.value [], [])) (add_thm func)) thy
haftmann@24624
   694
  end;
haftmann@24219
   695
haftmann@24624
   696
fun add_liberal_func thm thy =
haftmann@24624
   697
  case mk_liberal_func thm
haftmann@24624
   698
   of SOME func => let
haftmann@24624
   699
          val c = const_of_func thy func
haftmann@24624
   700
        in if (is_some o AxClass.class_of_param thy) c
haftmann@24624
   701
          orelse (is_some o get_datatype_of_constr thy) c
haftmann@24624
   702
          then thy
haftmann@24624
   703
          else map_exec_purge (SOME [c]) (map_funcs
haftmann@24624
   704
            (Symtab.map_default
haftmann@24624
   705
              (c, (Susp.value [], [])) (add_thm func))) thy
haftmann@24624
   706
        end
haftmann@24624
   707
    | NONE => thy;
haftmann@24624
   708
haftmann@24624
   709
fun add_default_func thm thy =
haftmann@24624
   710
  case mk_default_func thm
haftmann@24624
   711
   of SOME func => let
haftmann@24624
   712
          val c = const_of_func thy func
haftmann@24624
   713
        in if (is_some o AxClass.class_of_param thy) c
haftmann@24624
   714
          orelse (is_some o get_datatype_of_constr thy) c
haftmann@24624
   715
          then thy
haftmann@24624
   716
          else map_exec_purge (SOME [c]) (map_funcs
haftmann@24624
   717
          (Symtab.map_default
haftmann@24624
   718
            (c, (Susp.value [], [])) (add_thm func))) thy
haftmann@24624
   719
        end
haftmann@24624
   720
    | NONE => thy;
haftmann@24219
   721
haftmann@24219
   722
fun del_func thm thy =
haftmann@24659
   723
  case mk_liberal_func thm
haftmann@24659
   724
   of SOME func => let
haftmann@24659
   725
          val c = const_of_func thy func;
haftmann@24659
   726
        in map_exec_purge (SOME [c]) (map_funcs
haftmann@24659
   727
          (Symtab.map_entry c (del_thm func))) thy
haftmann@24659
   728
        end
haftmann@24659
   729
    | NONE => thy;
haftmann@24219
   730
haftmann@24219
   731
fun add_funcl (const, lthms) thy =
haftmann@24219
   732
  let
haftmann@24219
   733
    val lthms' = certificate thy (fn thy => certify_const thy const) lthms;
haftmann@24219
   734
      (*FIXME must check compatibility with sort algebra;
haftmann@24219
   735
        alas, naive checking results in non-termination!*)
haftmann@24219
   736
  in
haftmann@24423
   737
    map_exec_purge (SOME [const]) (map_funcs (Symtab.map_default (const, (Susp.value [], []))
haftmann@24219
   738
      (add_lthms lthms'))) thy
haftmann@24219
   739
  end;
haftmann@24219
   740
haftmann@24624
   741
val add_default_func_attr = Attrib.internal (fn _ => Thm.declaration_attribute
haftmann@24624
   742
  (fn thm => Context.mapping (add_default_func thm) I));
haftmann@24219
   743
haftmann@24423
   744
fun add_datatype raw_cs thy =
haftmann@24219
   745
  let
haftmann@24423
   746
    val cs = map (fn c_ty as (_, ty) => (Class.unoverload_const thy c_ty, ty)) raw_cs;
haftmann@24423
   747
    val (tyco, vs_cos) = CodeUnit.constrset_of_consts thy cs;
haftmann@24423
   748
    val purge_cs = map fst (snd vs_cos);
haftmann@24423
   749
    val purge_cs' = case Symtab.lookup ((the_dtyps o get_exec) thy) tyco
haftmann@24423
   750
     of SOME (vs, cos) => if null cos then NONE else SOME (purge_cs @ map fst cos)
haftmann@24423
   751
      | NONE => NONE;
haftmann@24219
   752
  in
haftmann@24219
   753
    thy
haftmann@24423
   754
    |> map_exec_purge purge_cs' (map_dtyps (Symtab.update (tyco, vs_cos))
haftmann@24423
   755
        #> map_funcs (fold (Symtab.delete_safe o fst) cs))
haftmann@24219
   756
  end;
haftmann@24219
   757
haftmann@24423
   758
fun add_datatype_cmd raw_cs thy =
haftmann@24423
   759
  let
haftmann@24423
   760
    val cs = map (CodeUnit.read_bare_const thy) raw_cs;
haftmann@24423
   761
  in add_datatype cs thy end;
haftmann@24219
   762
haftmann@24219
   763
fun add_inline thm thy =
haftmann@24219
   764
  (map_exec_purge NONE o map_thmproc o apfst o apfst o apfst)
haftmann@24219
   765
    (insert Thm.eq_thm_prop (CodeUnit.error_thm CodeUnit.mk_rew thm)) thy;
haftmann@24219
   766
        (*fully applied in order to get right context for mk_rew!*)
haftmann@24219
   767
haftmann@24219
   768
fun del_inline thm thy =
haftmann@24219
   769
  (map_exec_purge NONE o map_thmproc o apfst o apfst o apfst)
haftmann@24219
   770
    (remove Thm.eq_thm_prop (CodeUnit.error_thm CodeUnit.mk_rew thm)) thy;
haftmann@24219
   771
        (*fully applied in order to get right context for mk_rew!*)
haftmann@24219
   772
haftmann@24219
   773
fun add_inline_proc (name, f) =
haftmann@24219
   774
  (map_exec_purge NONE o map_thmproc o apfst o apfst o apsnd)
haftmann@24219
   775
    (AList.update (op =) (name, (serial (), f)));
haftmann@24219
   776
haftmann@24219
   777
fun del_inline_proc name =
haftmann@24219
   778
  (map_exec_purge NONE o map_thmproc o apfst o apfst o apsnd)
haftmann@24219
   779
    (delete_force "inline procedure" name);
haftmann@24219
   780
haftmann@24219
   781
fun add_preproc (name, f) =
haftmann@24219
   782
  (map_exec_purge NONE o map_thmproc o apfst o apsnd)
haftmann@24219
   783
    (AList.update (op =) (name, (serial (), f)));
haftmann@24219
   784
haftmann@24219
   785
fun del_preproc name =
haftmann@24219
   786
  (map_exec_purge NONE o map_thmproc o apfst o apsnd)
haftmann@24219
   787
    (delete_force "preprocessor" name);
haftmann@24219
   788
haftmann@24219
   789
fun add_post thm thy =
haftmann@24219
   790
  (map_exec_purge NONE o map_thmproc o apsnd)
haftmann@24219
   791
    (insert Thm.eq_thm_prop (CodeUnit.error_thm CodeUnit.mk_rew thm)) thy;
haftmann@24219
   792
        (*fully applied in order to get right context for mk_rew!*)
haftmann@24219
   793
haftmann@24219
   794
fun del_post thm thy =
haftmann@24219
   795
  (map_exec_purge NONE o map_thmproc o apsnd)
haftmann@24219
   796
    (remove Thm.eq_thm_prop (CodeUnit.error_thm CodeUnit.mk_rew thm)) thy;
haftmann@24219
   797
        (*fully applied in order to get right context for mk_rew!*)
haftmann@24219
   798
haftmann@24219
   799
val _ = Context.add_setup
haftmann@24219
   800
  (let
haftmann@24219
   801
    fun mk_attribute f = Thm.declaration_attribute (fn thm => Context.mapping (f thm) I);
haftmann@24219
   802
    fun add_simple_attribute (name, f) =
haftmann@24219
   803
      add_attribute (name, Scan.succeed (mk_attribute f));
haftmann@24219
   804
    fun add_del_attribute (name, (add, del)) =
haftmann@24219
   805
      add_attribute (name, Args.del |-- Scan.succeed (mk_attribute del)
haftmann@24219
   806
        || Scan.succeed (mk_attribute add))
haftmann@24219
   807
  in
haftmann@24624
   808
    add_del_attribute ("func", (add_func, del_func))
haftmann@24219
   809
    #> add_del_attribute ("inline", (add_inline, del_inline))
haftmann@24219
   810
    #> add_del_attribute ("post", (add_post, del_post))
haftmann@24219
   811
  end);
haftmann@24219
   812
haftmann@24219
   813
haftmann@24219
   814
(** post- and preprocessing **)
haftmann@24219
   815
haftmann@24219
   816
local
haftmann@24219
   817
haftmann@24219
   818
fun gen_apply_inline_proc prep post thy f x =
haftmann@24219
   819
  let
haftmann@24219
   820
    val cts = prep x;
haftmann@24219
   821
    val rews = map CodeUnit.assert_rew (f thy cts);
haftmann@24219
   822
  in post rews x end;
haftmann@24219
   823
haftmann@24219
   824
val apply_inline_proc = gen_apply_inline_proc (maps
haftmann@24219
   825
  ((fn [args, rhs] => rhs :: (snd o Drule.strip_comb) args) o snd o Drule.strip_comb o Thm.cprop_of))
haftmann@24219
   826
  (fn rews => map (CodeUnit.rewrite_func rews));
haftmann@24219
   827
val apply_inline_proc_cterm = gen_apply_inline_proc single
haftmann@24219
   828
  (MetaSimplifier.rewrite false);
haftmann@24219
   829
haftmann@24219
   830
fun apply_preproc thy f [] = []
haftmann@24219
   831
  | apply_preproc thy f (thms as (thm :: _)) =
haftmann@24219
   832
      let
haftmann@24423
   833
        val const = const_of_func thy thm;
haftmann@24219
   834
        val thms' = f thy thms;
haftmann@24219
   835
      in certify_const thy const thms' end;
haftmann@24219
   836
haftmann@24219
   837
fun rhs_conv conv thm =
haftmann@24219
   838
  let
haftmann@24219
   839
    val thm' = (conv o Thm.rhs_of) thm;
haftmann@24219
   840
  in Thm.transitive thm thm' end
haftmann@24219
   841
haftmann@24837
   842
fun term_of_conv thy f =
haftmann@24837
   843
  Thm.cterm_of thy
haftmann@24837
   844
  #> f
haftmann@24837
   845
  #> Thm.prop_of
haftmann@24837
   846
  #> Logic.dest_equals
haftmann@24837
   847
  #> snd;
haftmann@24837
   848
haftmann@24219
   849
in
haftmann@24219
   850
haftmann@24219
   851
fun preprocess thy thms =
haftmann@24219
   852
  thms
haftmann@24219
   853
  |> fold (fn (_, (_, f)) => apply_preproc thy f) ((#preprocs o the_thmproc o get_exec) thy)
haftmann@24219
   854
  |> map (CodeUnit.rewrite_func ((#inlines o the_thmproc o get_exec) thy))
haftmann@24219
   855
  |> fold (fn (_, (_, f)) => apply_inline_proc thy f) ((#inline_procs o the_thmproc o get_exec) thy)
haftmann@24219
   856
(*FIXME - must check: rewrite rule, defining equation, proper constant |> map (snd o check_func false thy) *)
haftmann@24423
   857
  |> common_typ_funcs
haftmann@24423
   858
  |> map (Conv.fconv_rule (Class.unoverload thy));
haftmann@24219
   859
haftmann@24219
   860
fun preprocess_conv ct =
haftmann@24219
   861
  let
haftmann@24219
   862
    val thy = Thm.theory_of_cterm ct;
haftmann@24219
   863
  in
haftmann@24219
   864
    ct
haftmann@24219
   865
    |> MetaSimplifier.rewrite false ((#inlines o the_thmproc o get_exec) thy)
haftmann@24219
   866
    |> fold (fn (_, (_, f)) => rhs_conv (apply_inline_proc_cterm thy f))
haftmann@24219
   867
        ((#inline_procs o the_thmproc o get_exec) thy)
haftmann@24423
   868
    |> rhs_conv (Class.unoverload thy)
haftmann@24219
   869
  end;
haftmann@24219
   870
haftmann@24837
   871
fun preprocess_term thy = term_of_conv thy preprocess_conv;
haftmann@24837
   872
haftmann@24219
   873
fun postprocess_conv ct =
haftmann@24219
   874
  let
haftmann@24219
   875
    val thy = Thm.theory_of_cterm ct;
haftmann@24219
   876
  in
haftmann@24219
   877
    ct
haftmann@24423
   878
    |> Class.overload thy
haftmann@24423
   879
    |> rhs_conv (MetaSimplifier.rewrite false ((#posts o the_thmproc o get_exec) thy))
haftmann@24219
   880
  end;
haftmann@24219
   881
haftmann@24837
   882
fun postprocess_term thy = term_of_conv thy postprocess_conv;
haftmann@24837
   883
haftmann@24219
   884
end; (*local*)
haftmann@24219
   885
haftmann@24423
   886
fun default_typ_proto thy c = case Class.param_const thy c
haftmann@24837
   887
 of SOME (c, tyco) => classparam_weakest_typ thy ((the o AxClass.class_of_param thy) c)
haftmann@24423
   888
      (c, tyco) |> SOME
haftmann@24423
   889
  | NONE => (case AxClass.class_of_param thy c
haftmann@24423
   890
     of SOME class => SOME (Term.map_type_tvar
haftmann@24423
   891
          (K (TVar (("'a", 0), [class]))) (Sign.the_const_type thy c))
haftmann@24423
   892
      | NONE => get_constr_typ thy c);
haftmann@24219
   893
haftmann@24219
   894
local
haftmann@24219
   895
haftmann@24219
   896
fun get_funcs thy const =
haftmann@24423
   897
  Symtab.lookup ((the_funcs o get_exec) thy) const
haftmann@24219
   898
  |> Option.map (Susp.force o fst)
haftmann@24219
   899
  |> these
haftmann@24219
   900
  |> map (Thm.transfer thy);
haftmann@24219
   901
haftmann@24219
   902
in
haftmann@24219
   903
haftmann@24219
   904
fun these_funcs thy const =
haftmann@24219
   905
  let
haftmann@24219
   906
    fun drop_refl thy = filter_out (is_equal o Term.fast_term_ord o Logic.dest_equals
haftmann@24219
   907
      o ObjectLogic.drop_judgment thy o Thm.plain_prop_of);
haftmann@24219
   908
  in
haftmann@24219
   909
    get_funcs thy const
haftmann@24219
   910
    |> preprocess thy
haftmann@24219
   911
    |> drop_refl thy
haftmann@24219
   912
  end;
haftmann@24219
   913
haftmann@24423
   914
fun default_typ thy c = case default_typ_proto thy c
haftmann@24219
   915
 of SOME ty => ty
haftmann@24423
   916
  | NONE => (case get_funcs thy c
haftmann@24423
   917
     of thm :: _ => snd (CodeUnit.head_func (Conv.fconv_rule (Class.unoverload thy) thm))
haftmann@24219
   918
      | [] => Sign.the_const_type thy c);
haftmann@24219
   919
haftmann@24219
   920
end; (*local*)
haftmann@24219
   921
haftmann@24219
   922
end; (*struct*)
haftmann@24219
   923
haftmann@24219
   924
haftmann@24219
   925
(** type-safe interfaces for data depedent on executable content **)
haftmann@24219
   926
haftmann@24219
   927
functor CodeDataFun(Data: CODE_DATA_ARGS): CODE_DATA =
haftmann@24219
   928
struct
haftmann@24219
   929
haftmann@24219
   930
type T = Data.T;
haftmann@24219
   931
exception Data of T;
haftmann@24219
   932
fun dest (Data x) = x
haftmann@24219
   933
haftmann@24219
   934
val kind = Code.declare_data (Data Data.empty)
haftmann@24219
   935
  (fn pp => fn (Data x1, Data x2) => Data (Data.merge pp (x1, x2)))
haftmann@24219
   936
  (fn thy_opt => fn cs => fn Data x => Data (Data.purge thy_opt cs x));
haftmann@24219
   937
haftmann@24219
   938
val data_op = (kind, Data, dest);
haftmann@24219
   939
haftmann@24219
   940
val get = Code.get_data data_op;
haftmann@24219
   941
val change = Code.change_data data_op;
haftmann@24219
   942
fun change_yield thy = Code.change_yield_data data_op thy;
haftmann@24219
   943
haftmann@24219
   944
end;
haftmann@24219
   945
haftmann@24219
   946
structure Code : CODE =
haftmann@24219
   947
struct
haftmann@24219
   948
haftmann@24219
   949
open Code;
haftmann@24219
   950
haftmann@24219
   951
end;