src/HOL/Tools/record_package.ML

-(*  Title:      HOL/Tools/record_package.ML
-    Author:     Wolfgang Naraschewski, Norbert Schirmer and Markus Wenzel, TU Muenchen
-
-Extensible records with structural subtyping in HOL.
-*)
-
-
-signature BASIC_RECORD_PACKAGE =
-sig
-  val record_simproc: simproc
-  val record_eq_simproc: simproc
-  val record_upd_simproc: simproc
-  val record_split_simproc: (term -> int) -> simproc
-  val record_ex_sel_eq_simproc: simproc
-  val record_split_tac: int -> tactic
-  val record_split_simp_tac: thm list -> (term -> int) -> int -> tactic
-  val record_split_name: string
-  val record_split_wrapper: string * wrapper
-  val print_record_type_abbr: bool ref
-  val print_record_type_as_fields: bool ref
-end;
-
-signature RECORD_PACKAGE =
-sig
-  include BASIC_RECORD_PACKAGE
-  val timing: bool ref
-  val record_quick_and_dirty_sensitive: bool ref
-  val updateN: string
-  val updN: string
-  val ext_typeN: string
-  val extN: string
-  val makeN: string
-  val moreN: string
-  val ext_dest: string
-
-  val last_extT: typ -> (string * typ list) option
-  val dest_recTs : typ -> (string * typ list) list
-  val get_extT_fields:  theory -> typ -> (string * typ) list * (string * typ)
-  val get_recT_fields:  theory -> typ -> (string * typ) list * (string * typ)
-  val get_parent: theory -> string -> (typ list * string) option
-  val get_extension: theory -> string -> (string * typ list) option
-  val get_extinjects: theory -> thm list
-  val get_simpset: theory -> simpset
-  val print_records: theory -> unit
-  val read_typ: Proof.context -> string -> (string * sort) list -> typ * (string * sort) list
-  val cert_typ: Proof.context -> typ -> (string * sort) list -> typ * (string * sort) list
-  val add_record: bool -> string list * string -> string option -> (string * string * mixfix) list
-    -> theory -> theory
-  val add_record_i: bool -> string list * string -> (typ list * string) option
-    -> (string * typ * mixfix) list -> theory -> theory
-  val setup: theory -> theory
-end;
-
-
-structure RecordPackage: RECORD_PACKAGE =
-struct
-
-val eq_reflection = thm "eq_reflection";
-val rec_UNIV_I = thm "rec_UNIV_I";
-val rec_True_simp = thm "rec_True_simp";
-val Pair_eq = thm "Product_Type.prod.inject";
-val atomize_all = thm "HOL.atomize_all";
-val atomize_imp = thm "HOL.atomize_imp";
-val meta_allE = thm "Pure.meta_allE";
-val prop_subst = thm "prop_subst";
-val Pair_sel_convs = [fst_conv,snd_conv];
-val K_record_comp = @{thm "K_record_comp"};
-val K_comp_convs = [@{thm o_apply}, K_record_comp]
-
-(** name components **)
-
-val rN = "r";
-val wN = "w";
-val moreN = "more";
-val schemeN = "_scheme";
-val ext_typeN = "_ext_type";
-val extN ="_ext";
-val casesN = "_cases";
-val ext_dest = "_sel";
-val updateN = "_update";
-val updN = "_upd";
-val makeN = "make";
-val fields_selN = "fields";
-val extendN = "extend";
-val truncateN = "truncate";
-
-(*see typedef_package.ML*)
-val RepN = "Rep_";
-val AbsN = "Abs_";
-
-(*** utilities ***)
-
-fun but_last xs = fst (split_last xs);
-
-fun varifyT midx =
-  let fun varify (a, S) = TVar ((a, midx + 1), S);
-  in map_type_tfree varify end;
-
-fun domain_type' T =
-    domain_type T handle Match => T;
-
-fun range_type' T =
-    range_type T handle Match => T;
-
-(* messages *)
-
-fun trace_thm str thm =
-    tracing (str ^ (Pretty.string_of (Display.pretty_thm thm)));
-
-fun trace_thms str thms =
-    (tracing str; map (trace_thm "") thms);
-
-fun trace_term str t =
-    tracing (str ^ Syntax.string_of_term_global Pure.thy t);
-
-(* timing *)
-
-val timing = ref false;
-fun timeit_msg s x = if !timing then (warning s; timeit x) else x ();
-fun timing_msg s = if !timing then warning s else ();
-
-(* syntax *)
-
-fun prune n xs = Library.drop (n, xs);
-fun prefix_base s = Long_Name.map_base_name (fn bname => s ^ bname);
-
-val Trueprop = HOLogic.mk_Trueprop;
-fun All xs t = Term.list_all_free (xs, t);
-
-infix 9 $$;
-infix 0 :== ===;
-infixr 0 ==>;
-
-val (op $$) = Term.list_comb;
-val (op :==) = PrimitiveDefs.mk_defpair;
-val (op ===) = Trueprop o HOLogic.mk_eq;
-val (op ==>) = Logic.mk_implies;
-
-(* morphisms *)
-
-fun mk_RepN name = suffix ext_typeN (prefix_base RepN name);
-fun mk_AbsN name = suffix ext_typeN (prefix_base AbsN name);
-
-fun mk_Rep name repT absT  =
-  Const (suffix ext_typeN (prefix_base RepN name),absT --> repT);
-
-fun mk_Abs name repT absT =
-  Const (mk_AbsN name,repT --> absT);
-
-(* constructor *)
-
-fun mk_extC (name,T) Ts  = (suffix extN name, Ts ---> T);
-
-fun mk_ext (name,T) ts =
-  let val Ts = map fastype_of ts
-  in list_comb (Const (mk_extC (name,T) Ts),ts) end;
-
-(* cases *)
-
-fun mk_casesC (name,T,vT) Ts = (suffix casesN name, (Ts ---> vT) --> T --> vT)
-
-fun mk_cases (name,T,vT) f =
-  let val Ts = binder_types (fastype_of f)
-  in Const (mk_casesC (name,T,vT) Ts) $ f end;
-
-(* selector *)
-
-fun mk_selC sT (c,T) = (c,sT --> T);
-
-fun mk_sel s (c,T) =
-  let val sT = fastype_of s
-  in Const (mk_selC sT (c,T)) $ s end;
-
-(* updates *)
-
-fun mk_updC sfx sT (c,T) = (suffix sfx c, (T --> T) --> sT --> sT);
-
-fun mk_upd' sfx c v sT =
-  let val vT = domain_type (fastype_of v);
-  in Const (mk_updC sfx sT (c, vT)) $ v  end;
-
-fun mk_upd sfx c v s = mk_upd' sfx c v (fastype_of s) $ s
-
-(* types *)
-
-fun dest_recT (typ as Type (c_ext_type, Ts as (T::_))) =
-      (case try (unsuffix ext_typeN) c_ext_type of
-        NONE => raise TYPE ("RecordPackage.dest_recT", [typ], [])
-      | SOME c => ((c, Ts), List.last Ts))
-  | dest_recT typ = raise TYPE ("RecordPackage.dest_recT", [typ], []);
-
-fun is_recT T =
-  (case try dest_recT T of NONE => false | SOME _ => true);
-
-fun dest_recTs T =
-  let val ((c, Ts), U) = dest_recT T
-  in (c, Ts) :: dest_recTs U
-  end handle TYPE _ => [];
-
-fun last_extT T =
-  let val ((c, Ts), U) = dest_recT T
-  in (case last_extT U of
-        NONE => SOME (c,Ts)
-      | SOME l => SOME l)
-  end handle TYPE _ => NONE
-
-fun rec_id i T =
-  let val rTs = dest_recTs T
-      val rTs' = if i < 0 then rTs else Library.take (i,rTs)
-  in Library.foldl (fn (s,(c,T)) => s ^ c) ("",rTs') end;
-
-(*** extend theory by record definition ***)
-
-(** record info **)
-
-(* type record_info and parent_info  *)
-
-type record_info =
- {args: (string * sort) list,
-  parent: (typ list * string) option,
-  fields: (string * typ) list,
-  extension: (string * typ list),
-  induct: thm
- };
-
-fun make_record_info args parent fields extension induct =
- {args = args, parent = parent, fields = fields, extension = extension,
-  induct = induct}: record_info;
-
-
-type parent_info =
- {name: string,
-  fields: (string * typ) list,
-  extension: (string * typ list),
-  induct: thm
-};
-
-fun make_parent_info name fields extension induct =
- {name = name, fields = fields, extension = extension, induct = induct}: parent_info;
-
-
-(* theory data *)
-
-type record_data =
- {records: record_info Symtab.table,
-  sel_upd:
-   {selectors: unit Symtab.table,
-    updates: string Symtab.table,
-    simpset: Simplifier.simpset},
-  equalities: thm Symtab.table,
-  extinjects: thm list,
-  extsplit: thm Symtab.table, (* maps extension name to split rule *)
-  splits: (thm*thm*thm*thm) Symtab.table,    (* !!,!,EX - split-equalities,induct rule *)
-  extfields: (string*typ) list Symtab.table, (* maps extension to its fields *)
-  fieldext: (string*typ list) Symtab.table   (* maps field to its extension *)
-};
-
-fun make_record_data
-      records sel_upd equalities extinjects extsplit splits extfields fieldext =
- {records = records, sel_upd = sel_upd,
-  equalities = equalities, extinjects=extinjects, extsplit = extsplit, splits = splits,
-  extfields = extfields, fieldext = fieldext }: record_data;
-
-structure RecordsData = TheoryDataFun
-(
-  type T = record_data;
-  val empty =
-    make_record_data Symtab.empty
-      {selectors = Symtab.empty, updates = Symtab.empty, simpset = HOL_basic_ss}
-       Symtab.empty [] Symtab.empty Symtab.empty Symtab.empty Symtab.empty;
-
-  val copy = I;
-  val extend = I;
-  fun merge _
-   ({records = recs1,
-     sel_upd = {selectors = sels1, updates = upds1, simpset = ss1},
-     equalities = equalities1,
-     extinjects = extinjects1,
-     extsplit = extsplit1,
-     splits = splits1,
-     extfields = extfields1,
-     fieldext = fieldext1},
-    {records = recs2,
-     sel_upd = {selectors = sels2, updates = upds2, simpset = ss2},
-     equalities = equalities2,
-     extinjects = extinjects2,
-     extsplit = extsplit2,
-     splits = splits2,
-     extfields = extfields2,
-     fieldext = fieldext2}) =
-    make_record_data
-      (Symtab.merge (K true) (recs1, recs2))
-      {selectors = Symtab.merge (K true) (sels1, sels2),
-        updates = Symtab.merge (K true) (upds1, upds2),
-        simpset = Simplifier.merge_ss (ss1, ss2)}
-      (Symtab.merge Thm.eq_thm_prop (equalities1, equalities2))
-      (Library.merge Thm.eq_thm_prop (extinjects1, extinjects2))
-      (Symtab.merge Thm.eq_thm_prop (extsplit1,extsplit2))
-      (Symtab.merge (fn ((a,b,c,d),(w,x,y,z))
-                     => Thm.eq_thm (a,w) andalso Thm.eq_thm (b,x) andalso
-                        Thm.eq_thm (c,y) andalso Thm.eq_thm (d,z))
-                    (splits1, splits2))
-      (Symtab.merge (K true) (extfields1,extfields2))
-      (Symtab.merge (K true) (fieldext1,fieldext2));
-);
-
-fun print_records thy =
-  let
-    val {records = recs, ...} = RecordsData.get thy;
-    val prt_typ = Syntax.pretty_typ_global thy;
-
-    fun pretty_parent NONE = []
-      | pretty_parent (SOME (Ts, name)) =
-          [Pretty.block [prt_typ (Type (name, Ts)), Pretty.str " +"]];
-
-    fun pretty_field (c, T) = Pretty.block
-      [Pretty.str (Sign.extern_const thy c), Pretty.str " ::",
-        Pretty.brk 1, Pretty.quote (prt_typ T)];
-
-    fun pretty_record (name, {args, parent, fields, ...}: record_info) =
-      Pretty.block (Pretty.fbreaks (Pretty.block
-        [prt_typ (Type (name, map TFree args)), Pretty.str " = "] ::
-        pretty_parent parent @ map pretty_field fields));
-  in map pretty_record (Symtab.dest recs) |> Pretty.chunks |> Pretty.writeln end;
-
-
-(* access 'records' *)
-
-val get_record = Symtab.lookup o #records o RecordsData.get;
-
-fun put_record name info thy =
-  let
-    val {records, sel_upd, equalities, extinjects,extsplit,splits,extfields,fieldext} =
-          RecordsData.get thy;
-    val data = make_record_data (Symtab.update (name, info) records)
-      sel_upd equalities extinjects extsplit splits extfields fieldext;
-  in RecordsData.put data thy end;
-
-
-(* access 'sel_upd' *)
-
-val get_sel_upd = #sel_upd o RecordsData.get;
-
-val is_selector = Symtab.defined o #selectors o get_sel_upd;
-val get_updates = Symtab.lookup o #updates o get_sel_upd;
-fun get_simpset thy = Simplifier.theory_context thy (#simpset (get_sel_upd thy));
-
-fun put_sel_upd names simps = RecordsData.map (fn {records,
-  sel_upd = {selectors, updates, simpset},
-    equalities, extinjects, extsplit, splits, extfields, fieldext} =>
-  make_record_data records
-    {selectors = fold (fn name => Symtab.update (name, ())) names selectors,
-      updates = fold (fn name => Symtab.update ((suffix updateN) name, name)) names updates,
-      simpset = Simplifier.addsimps (simpset, simps)}
-      equalities extinjects extsplit splits extfields fieldext);
-
-
-(* access 'equalities' *)
-
-fun add_record_equalities name thm thy =
-  let
-    val {records, sel_upd, equalities, extinjects, extsplit, splits, extfields,fieldext} =
-          RecordsData.get thy;
-    val data = make_record_data records sel_upd
-           (Symtab.update_new (name, thm) equalities) extinjects extsplit
-           splits extfields fieldext;
-  in RecordsData.put data thy end;
-
-val get_equalities =Symtab.lookup o #equalities o RecordsData.get;
-
-
-(* access 'extinjects' *)
-
-fun add_extinjects thm thy =
-  let
-    val {records, sel_upd, equalities, extinjects, extsplit, splits, extfields,fieldext} =
-          RecordsData.get thy;
-    val data =
-      make_record_data records sel_upd equalities (insert Thm.eq_thm_prop thm extinjects) extsplit
-        splits extfields fieldext;
-  in RecordsData.put data thy end;
-
-val get_extinjects = rev o #extinjects o RecordsData.get;
-
-
-(* access 'extsplit' *)
-
-fun add_extsplit name thm thy =
-  let
-    val {records, sel_upd, equalities, extinjects, extsplit, splits, extfields,fieldext} =
-          RecordsData.get thy;
-    val data = make_record_data records sel_upd
-      equalities extinjects (Symtab.update_new (name, thm) extsplit) splits
-      extfields fieldext;
-  in RecordsData.put data thy end;
-
-val get_extsplit = Symtab.lookup o #extsplit o RecordsData.get;
-
-
-(* access 'splits' *)
-
-fun add_record_splits name thmP thy =
-  let
-    val {records, sel_upd, equalities, extinjects, extsplit, splits, extfields,fieldext} =
-          RecordsData.get thy;
-    val data = make_record_data records sel_upd
-      equalities extinjects extsplit (Symtab.update_new (name, thmP) splits)
-      extfields fieldext;
-  in RecordsData.put data thy end;
-
-val get_splits = Symtab.lookup o #splits o RecordsData.get;
-
-
-(* parent/extension of named record *)
-
-val get_parent = (Option.join o Option.map #parent) oo (Symtab.lookup o #records o RecordsData.get);
-val get_extension = Option.map #extension oo (Symtab.lookup o #records o RecordsData.get);
-
-
-(* access 'extfields' *)
-
-fun add_extfields name fields thy =
-  let
-    val {records, sel_upd, equalities, extinjects, extsplit,splits, extfields, fieldext} =
-          RecordsData.get thy;
-    val data = make_record_data records sel_upd
-         equalities extinjects extsplit splits
-         (Symtab.update_new (name, fields) extfields) fieldext;
-  in RecordsData.put data thy end;
-
-val get_extfields = Symtab.lookup o #extfields o RecordsData.get;
-
-fun get_extT_fields thy T =
-  let
-    val ((name,Ts),moreT) = dest_recT T;
-    val recname = let val (nm::recn::rst) = rev (Long_Name.explode name)
-                  in Long_Name.implode (rev (nm::rst)) end;
-    val midx = maxidx_of_typs (moreT::Ts);
-    val varifyT = varifyT midx;
-    val {records,extfields,...} = RecordsData.get thy;
-    val (flds,(more,_)) = split_last (Symtab.lookup_list extfields name);
-    val args = map varifyT (snd (#extension (the (Symtab.lookup records recname))));
-
-    val subst = fold (Sign.typ_match thy) (but_last args ~~ but_last Ts) (Vartab.empty);
-    val flds' = map (apsnd ((Envir.norm_type subst) o varifyT)) flds;
-  in (flds',(more,moreT)) end;
-
-fun get_recT_fields thy T =
-  let
-    val (root_flds,(root_more,root_moreT)) = get_extT_fields thy T;
-    val (rest_flds,rest_more) =
-           if is_recT root_moreT then get_recT_fields thy root_moreT
-           else ([],(root_more,root_moreT));
-  in (root_flds@rest_flds,rest_more) end;
-
-
-(* access 'fieldext' *)
-
-fun add_fieldext extname_types fields thy =
-  let
-    val {records, sel_upd, equalities, extinjects, extsplit, splits, extfields, fieldext} =
-           RecordsData.get thy;
-    val fieldext' =
-      fold (fn field => Symtab.update_new (field, extname_types)) fields fieldext;
-    val data=make_record_data records sel_upd equalities extinjects extsplit
-              splits extfields fieldext';
-  in RecordsData.put data thy end;
-
-
-val get_fieldext = Symtab.lookup o #fieldext o RecordsData.get;
-
-
-(* parent records *)
-
-fun add_parents thy NONE parents = parents
-  | add_parents thy (SOME (types, name)) parents =
-      let
-        fun err msg = error (msg ^ " parent record " ^ quote name);
-
-        val {args, parent, fields, extension, induct} =
-          (case get_record thy name of SOME info => info | NONE => err "Unknown");
-        val _ = if length types <> length args then err "Bad number of arguments for" else ();
-
-        fun bad_inst ((x, S), T) =
-          if Sign.of_sort thy (T, S) then NONE else SOME x
-        val bads = List.mapPartial bad_inst (args ~~ types);
-        val _ = null bads orelse err ("Ill-sorted instantiation of " ^ commas bads ^ " in");
-
-        val inst = map fst args ~~ types;
-        val subst = Term.map_type_tfree (the o AList.lookup (op =) inst o fst);
-        val parent' = Option.map (apfst (map subst)) parent;
-        val fields' = map (apsnd subst) fields;
-        val extension' = apsnd (map subst) extension;
-      in
-        add_parents thy parent'
-          (make_parent_info name fields' extension' induct :: parents)
-      end;
-
-
-
-(** concrete syntax for records **)
-
-(* decode type *)
-
-fun decode_type thy t =
-  let
-    fun get_sort xs n = AList.lookup (op =) xs (n: indexname) |> the_default (Sign.defaultS thy);
-    val map_sort = Sign.intern_sort thy;
-  in
-    Syntax.typ_of_term (get_sort (Syntax.term_sorts map_sort t)) map_sort t
-    |> Sign.intern_tycons thy
-  end;
-
-
-(* parse translations *)
-
-fun gen_field_tr mark sfx (t as Const (c, _) $ Const (name, _) $ arg) =
-      if c = mark then Syntax.const (suffix sfx name) $ (Abs ("_",dummyT, arg))
-      else raise TERM ("gen_field_tr: " ^ mark, [t])
-  | gen_field_tr mark _ t = raise TERM ("gen_field_tr: " ^ mark, [t]);
-
-fun gen_fields_tr sep mark sfx (tm as Const (c, _) $ t $ u) =
-      if c = sep then gen_field_tr mark sfx t :: gen_fields_tr sep mark sfx u
-      else [gen_field_tr mark sfx tm]
-  | gen_fields_tr _ mark sfx tm = [gen_field_tr mark sfx tm];
-
-
-fun record_update_tr [t, u] =
-      Library.foldr (op $) (rev (gen_fields_tr "_updates" "_update" updateN u), t)
-  | record_update_tr ts = raise TERM ("record_update_tr", ts);
-
-fun update_name_tr (Free (x, T) :: ts) = Free (suffix updateN x, T) $$ ts
-  | update_name_tr (Const (x, T) :: ts) = Const (suffix updateN x, T) $$ ts
-  | update_name_tr (((c as Const ("_constrain", _)) $ t $ ty) :: ts) =
-      (c $ update_name_tr [t] $ (Syntax.const "fun" $ ty $ Syntax.const "dummy")) $$ ts
-  | update_name_tr ts = raise TERM ("update_name_tr", ts);
-
-fun dest_ext_field mark (t as (Const (c,_) $ Const (name,_) $ arg)) =
-     if c = mark then (name,arg) else raise TERM ("dest_ext_field: " ^ mark, [t])
-  | dest_ext_field _ t = raise TERM ("dest_ext_field", [t])
-
-fun dest_ext_fields sep mark (trm as (Const (c,_) $ t $ u)) =
-     if c = sep then dest_ext_field mark t::dest_ext_fields sep mark u
-     else [dest_ext_field mark trm]
-  | dest_ext_fields _ mark t = [dest_ext_field mark t]
-
-fun gen_ext_fields_tr sep mark sfx more ctxt t =
-  let
-    val thy = ProofContext.theory_of ctxt;
-    val msg = "error in record input: ";
-    val fieldargs = dest_ext_fields sep mark t;
-    fun splitargs (field::fields) ((name,arg)::fargs) =
-          if can (unsuffix name) field
-          then let val (args,rest) = splitargs fields fargs
-               in (arg::args,rest) end
-          else raise TERM (msg ^ "expecting field " ^ field ^ " but got " ^ name, [t])
-      | splitargs [] (fargs as (_::_)) = ([],fargs)
-      | splitargs (_::_) [] = raise TERM (msg ^ "expecting more fields", [t])
-      | splitargs _ _ = ([],[]);
-
-    fun mk_ext (fargs as (name,arg)::_) =
-         (case get_fieldext thy (Sign.intern_const thy name) of
-            SOME (ext,_) => (case get_extfields thy ext of
-                               SOME flds
-                                 => let val (args,rest) =
-                                               splitargs (map fst (but_last flds)) fargs;
-                                        val more' = mk_ext rest;
-                                    in list_comb (Syntax.const (suffix sfx ext),args@[more'])
-                                    end
-                             | NONE => raise TERM(msg ^ "no fields defined for "
-                                                   ^ ext,[t]))
-          | NONE => raise TERM (msg ^ name ^" is no proper field",[t]))
-      | mk_ext [] = more
-
-  in mk_ext fieldargs end;
-
-fun gen_ext_type_tr sep mark sfx more ctxt t =
-  let
-    val thy = ProofContext.theory_of ctxt;
-    val msg = "error in record-type input: ";
-    val fieldargs = dest_ext_fields sep mark t;
-    fun splitargs (field::fields) ((name,arg)::fargs) =
-          if can (unsuffix name) field
-          then let val (args,rest) = splitargs fields fargs
-               in (arg::args,rest) end
-          else raise TERM (msg ^ "expecting field " ^ field ^ " but got " ^ name, [t])
-      | splitargs [] (fargs as (_::_)) = ([],fargs)
-      | splitargs (_::_) [] = raise TERM (msg ^ "expecting more fields", [t])
-      | splitargs _ _ = ([],[]);
-
-    fun mk_ext (fargs as (name,arg)::_) =
-         (case get_fieldext thy (Sign.intern_const thy name) of
-            SOME (ext,alphas) =>
-              (case get_extfields thy ext of
-                 SOME flds
-                  => (let
-                       val flds' = but_last flds;
-                       val types = map snd flds';
-                       val (args,rest) = splitargs (map fst flds') fargs;
-                       val argtypes = map (Sign.certify_typ thy o decode_type thy) args;
-                       val midx =  fold (fn T => fn i => Int.max (maxidx_of_typ T, i))
-                                    argtypes 0;
-                       val varifyT = varifyT midx;
-                       val vartypes = map varifyT types;
-
-                       val subst = fold (Sign.typ_match thy) (vartypes ~~ argtypes)
-                                            Vartab.empty;
-                       val alphas' = map ((Syntax.term_of_typ (! Syntax.show_sorts)) o
-                                          Envir.norm_type subst o varifyT)
-                                         (but_last alphas);
-
-                       val more' = mk_ext rest;
-                     in list_comb (Syntax.const (suffix sfx ext),alphas'@[more'])
-                     end handle TYPE_MATCH => raise
-                           TERM (msg ^ "type is no proper record (extension)", [t]))
-               | NONE => raise TERM (msg ^ "no fields defined for " ^ ext,[t]))
-          | NONE => raise TERM (msg ^ name ^" is no proper field",[t]))
-      | mk_ext [] = more
-
-  in mk_ext fieldargs end;
-
-fun gen_adv_record_tr sep mark sfx unit ctxt [t] =
-      gen_ext_fields_tr sep mark sfx unit ctxt t
-  | gen_adv_record_tr _ _ _ _ _ ts = raise TERM ("gen_record_tr", ts);
-
-fun gen_adv_record_scheme_tr sep mark sfx ctxt [t, more] =
-      gen_ext_fields_tr sep mark sfx more ctxt t
-  | gen_adv_record_scheme_tr _ _ _ _ ts = raise TERM ("gen_record_scheme_tr", ts);
-
-fun gen_adv_record_type_tr sep mark sfx unit ctxt [t] =
-      gen_ext_type_tr sep mark sfx unit ctxt t
-  | gen_adv_record_type_tr _ _ _ _ _ ts = raise TERM ("gen_record_tr", ts);
-
-fun gen_adv_record_type_scheme_tr sep mark sfx ctxt [t, more] =
-      gen_ext_type_tr sep mark sfx more ctxt t
-  | gen_adv_record_type_scheme_tr _ _ _ _ ts = raise TERM ("gen_record_scheme_tr", ts);
-
-val adv_record_tr = gen_adv_record_tr "_fields" "_field" extN HOLogic.unit;
-val adv_record_scheme_tr = gen_adv_record_scheme_tr "_fields" "_field" extN;
-
-val adv_record_type_tr =
-      gen_adv_record_type_tr "_field_types" "_field_type" ext_typeN
-        (Syntax.term_of_typ false (HOLogic.unitT));
-val adv_record_type_scheme_tr =
-      gen_adv_record_type_scheme_tr "_field_types" "_field_type" ext_typeN;
-
-
-val parse_translation =
- [("_record_update", record_update_tr),
-  ("_update_name", update_name_tr)];
-
-
-val adv_parse_translation =
- [("_record",adv_record_tr),
-  ("_record_scheme",adv_record_scheme_tr),
-  ("_record_type",adv_record_type_tr),
-  ("_record_type_scheme",adv_record_type_scheme_tr)];
-
-
-(* print translations *)
-
-val print_record_type_abbr = ref true;
-val print_record_type_as_fields = ref true;
-
-fun gen_field_upds_tr' mark sfx (tm as Const (name_field, _) $ k $ u) =
-  let val t = (case k of (Abs (_,_,(Abs (_,_,t)$Bound 0))) 
-                  => if null (loose_bnos t) then t else raise Match
-               | Abs (x,_,t) => if null (loose_bnos t) then t else raise Match
-               | _ => raise Match)
-
-      (* (case k of (Const ("K_record",_)$t) => t
-               | Abs (x,_,Const ("K_record",_)$t$Bound 0) => t
-               | _ => raise Match)*)
-  in
-    (case try (unsuffix sfx) name_field of
-      SOME name =>
-        apfst (cons (Syntax.const mark $ Syntax.free name $ t)) (gen_field_upds_tr' mark sfx u)
-     | NONE => ([], tm))
-  end
-  | gen_field_upds_tr' _ _ tm = ([], tm);
-
-fun record_update_tr' tm =
-  let val (ts, u) = gen_field_upds_tr' "_update" updateN tm in
-    if null ts then raise Match
-    else Syntax.const "_record_update" $ u $
-          foldr1 (fn (v, w) => Syntax.const "_updates" $ v $ w) (rev ts)
-  end;
-
-fun gen_field_tr' sfx tr' name =
-  let val name_sfx = suffix sfx name
-  in (name_sfx, fn [t, u] => tr' (Syntax.const name_sfx $ t $ u) | _ => raise Match) end;
-
-fun record_tr' sep mark record record_scheme unit ctxt t =
-  let
-    val thy = ProofContext.theory_of ctxt;
-    fun field_lst t =
-      (case strip_comb t of
-        (Const (ext,_),args as (_::_))
-         => (case try (unsuffix extN) (Sign.intern_const thy ext) of
-               SOME ext'
-               => (case get_extfields thy ext' of
-                     SOME flds
-                     => (let
-                          val (f::fs) = but_last (map fst flds);
-                          val flds' = Sign.extern_const thy f :: map Long_Name.base_name fs;
-                          val (args',more) = split_last args;
-                         in (flds'~~args')@field_lst more end
-                         handle Library.UnequalLengths => [("",t)])
-                   | NONE => [("",t)])
-             | NONE => [("",t)])
-       | _ => [("",t)])
-
-    val (flds,(_,more)) = split_last (field_lst t);
-    val _ = if null flds then raise Match else ();
-    val flds' = map (fn (n,t)=>Syntax.const mark$Syntax.const n$t) flds;
-    val flds'' = foldr1 (fn (x,y) => Syntax.const sep$x$y) flds';
-
-  in if unit more
-     then Syntax.const record$flds''
-     else Syntax.const record_scheme$flds''$more
-  end
-
-fun gen_record_tr' name =
-  let val name_sfx = suffix extN name;
-      val unit = (fn Const (@{const_syntax "Product_Type.Unity"},_) => true | _ => false);
-      fun tr' ctxt ts = record_tr' "_fields" "_field" "_record" "_record_scheme" unit ctxt
-                       (list_comb (Syntax.const name_sfx,ts))
-  in (name_sfx,tr')
-  end
-
-fun print_translation names =
-  map (gen_field_tr' updateN record_update_tr') names;
-
-
-(* record_type_abbr_tr' tries to reconstruct the record name type abbreviation from *)
-(* the (nested) extension types.                                                    *)
-fun record_type_abbr_tr' default_tr' abbr alphas zeta lastExt schemeT ctxt tm =
-  let
-      val thy = ProofContext.theory_of ctxt;
-      (* tm is term representation of a (nested) field type. We first reconstruct the      *)
-      (* type from tm so that we can continue on the type level rather then the term level.*)
-
-      (* WORKAROUND:
-       * If a record type occurs in an error message of type inference there
-       * may be some internal frees donoted by ??:
-       * (Const "_tfree",_)$Free ("??'a",_).
-
-       * This will unfortunately be translated to Type ("??'a",[]) instead of
-       * TFree ("??'a",_) by typ_of_term, which will confuse unify below.
-       * fixT works around.
-       *)
-      fun fixT (T as Type (x,[])) =
-            if String.isPrefix "??'" x then TFree (x,Sign.defaultS thy) else T
-        | fixT (Type (x,xs)) = Type (x,map fixT xs)
-        | fixT T = T;
-
-      val T = fixT (decode_type thy tm);
-      val midx = maxidx_of_typ T;
-      val varifyT = varifyT midx;
-
-      fun mk_type_abbr subst name alphas =
-          let val abbrT = Type (name, map (fn a => varifyT (TFree (a, Sign.defaultS thy))) alphas);
-          in Syntax.term_of_typ (! Syntax.show_sorts)
-               (Sign.extern_typ thy (Envir.norm_type subst abbrT)) end;
-
-      fun match rT T = (Sign.typ_match thy (varifyT rT,T)
-                                                Vartab.empty);
-
-   in if !print_record_type_abbr
-      then (case last_extT T of
-             SOME (name,_)
-              => if name = lastExt
-                 then
-                  (let
-                     val subst = match schemeT T
-                   in
-                    if HOLogic.is_unitT (Envir.norm_type subst (varifyT (TFree(zeta,Sign.defaultS thy))))
-                    then mk_type_abbr subst abbr alphas
-                    else mk_type_abbr subst (suffix schemeN abbr) (alphas@[zeta])
-                   end handle TYPE_MATCH => default_tr' ctxt tm)
-                 else raise Match (* give print translation of specialised record a chance *)
-            | _ => raise Match)
-       else default_tr' ctxt tm
-  end
-
-fun record_type_tr' sep mark record record_scheme ctxt t =
-  let
-    val thy = ProofContext.theory_of ctxt;
-
-    val T = decode_type thy t;
-    val varifyT = varifyT (Term.maxidx_of_typ T);
-
-    fun term_of_type T = Syntax.term_of_typ (!Syntax.show_sorts) (Sign.extern_typ thy T);
-
-    fun field_lst T =
-      (case T of
-        Type (ext, args)
-         => (case try (unsuffix ext_typeN) ext of
-               SOME ext'
-               => (case get_extfields thy ext' of
-                     SOME flds
-                     => (case get_fieldext thy (fst (hd flds)) of
-                           SOME (_, alphas)
-                           => (let
-                                val (f :: fs) = but_last flds;
-                                val flds' = apfst (Sign.extern_const thy) f
-                                  :: map (apfst Long_Name.base_name) fs;
-                                val (args', more) = split_last args;
-                                val alphavars = map varifyT (but_last alphas);
-                                val subst = fold2 (curry (Sign.typ_match thy))
-                                  alphavars args' Vartab.empty;
-                                val flds'' = (map o apsnd)
-                                  (Envir.norm_type subst o varifyT) flds';
-                              in flds'' @ field_lst more end
-                              handle TYPE_MATCH => [("", T)]
-                                  | Library.UnequalLengths => [("", T)])
-                         | NONE => [("", T)])
-                   | NONE => [("", T)])
-             | NONE => [("", T)])
-        | _ => [("", T)])
-
-    val (flds, (_, moreT)) = split_last (field_lst T);
-    val flds' = map (fn (n, T) => Syntax.const mark $ Syntax.const n $ term_of_type T) flds;
-    val flds'' = foldr1 (fn (x, y) => Syntax.const sep $ x $ y) flds' handle Empty => raise Match;
-
-  in if not (!print_record_type_as_fields) orelse null flds then raise Match
-     else if moreT = HOLogic.unitT
-          then Syntax.const record$flds''
-          else Syntax.const record_scheme$flds''$term_of_type moreT
-  end
-
-
-fun gen_record_type_tr' name =
-  let val name_sfx = suffix ext_typeN name;
-      fun tr' ctxt ts = record_type_tr' "_field_types" "_field_type"
-                       "_record_type" "_record_type_scheme" ctxt
-                       (list_comb (Syntax.const name_sfx,ts))
-  in (name_sfx,tr')
-  end
-
-
-fun gen_record_type_abbr_tr' abbr alphas zeta lastExt schemeT name =
-  let val name_sfx = suffix ext_typeN name;
-      val default_tr' = record_type_tr' "_field_types" "_field_type"
-                               "_record_type" "_record_type_scheme"
-      fun tr' ctxt ts =
-          record_type_abbr_tr' default_tr' abbr alphas zeta lastExt schemeT ctxt
-                               (list_comb (Syntax.const name_sfx,ts))
-  in (name_sfx, tr') end;
-
-(** record simprocs **)
-
-val record_quick_and_dirty_sensitive = ref false;
-
-
-fun quick_and_dirty_prove stndrd thy asms prop tac =
-  if !record_quick_and_dirty_sensitive andalso !quick_and_dirty
-  then Goal.prove (ProofContext.init thy) [] []
-        (Logic.list_implies (map Logic.varify asms,Logic.varify prop))
-        (K (SkipProof.cheat_tac @{theory HOL}))
-        (* standard can take quite a while for large records, thats why
-         * we varify the proposition manually here.*)
-  else let val prf = Goal.prove (ProofContext.init thy) [] asms prop tac;
-       in if stndrd then standard prf else prf end;
-
-fun quick_and_dirty_prf noopt opt () =
-      if !record_quick_and_dirty_sensitive andalso !quick_and_dirty
-      then noopt ()
-      else opt ();
-
-local
-fun abstract_over_fun_app (Abs (f,fT,t)) =
-  let
-     val (f',t') = Term.dest_abs (f,fT,t);
-     val T = domain_type fT;
-     val (x,T') = hd (Term.variant_frees t' [("x",T)]);
-     val f_x = Free (f',fT)$(Free (x,T'));
-     fun is_constr (Const (c,_)$_) = can (unsuffix extN) c
-       | is_constr _ = false;
-     fun subst (t as u$w) = if Free (f',fT)=u
-                            then if is_constr w then f_x
-                                 else raise TERM ("abstract_over_fun_app",[t])
-                            else subst u$subst w
-       | subst (Abs (x,T,t)) = (Abs (x,T,subst t))
-       | subst t = t
-     val t'' = abstract_over (f_x,subst t');
-     val vars = strip_qnt_vars "all" t'';
-     val bdy = strip_qnt_body "all" t'';
-
-  in list_abs ((x,T')::vars,bdy) end
-  | abstract_over_fun_app t = raise TERM ("abstract_over_fun_app",[t]);
-(* Generates a theorem of the kind:
- * !!f x*. PROP P (f ( r x* ) x* == !!r x*. PROP P r x*
- *)
-fun mk_fun_apply_eq (Abs (f, fT, t)) thy =
-  let
-    val rT = domain_type fT;
-    val vars = Term.strip_qnt_vars "all" t;
-    val Ts = map snd vars;
-    val n = length vars;
-    fun app_bounds 0 t = t$Bound 0
-      | app_bounds n t = if n > 0 then app_bounds (n-1) (t$Bound n) else t
-
-
-    val [P,r] = Term.variant_frees t [("P",rT::Ts--->Term.propT),("r",Ts--->rT)];
-    val prop = Logic.mk_equals
-                (list_all ((f,fT)::vars,
-                           app_bounds (n - 1) ((Free P)$(Bound n$app_bounds (n-1) (Free r)))),
-                 list_all ((fst r,rT)::vars,
-                           app_bounds (n - 1) ((Free P)$Bound n)));
-    val prove_standard = quick_and_dirty_prove true thy;
-    val thm = prove_standard [] prop (fn _ =>
-	 EVERY [rtac equal_intr_rule 1,
-                Goal.norm_hhf_tac 1,REPEAT (etac meta_allE 1), atac 1,
-                Goal.norm_hhf_tac 1,REPEAT (etac meta_allE 1), atac 1]);
-  in thm end
-  | mk_fun_apply_eq t thy = raise TERM ("mk_fun_apply_eq",[t]);
-
-in
-(* During proof of theorems produced by record_simproc you can end up in
- * situations like "!!f ... . ... f r ..." where f is an extension update function.
- * In order to split "f r" we transform this to "!!r ... . ... r ..." so that the
- * usual split rules for extensions can apply.
- *)
-val record_split_f_more_simproc =
-  Simplifier.simproc @{theory HOL} "record_split_f_more_simp" ["x"]
-    (fn thy => fn _ => fn t =>
-      (case t of (Const ("all", Type (_, [Type (_, [Type("fun",[T,T']), _]), _])))$
-                  (trm as Abs _) =>
-         (case rec_id (~1) T of
-            "" => NONE
-          | n => if T=T'
-                 then (let
-                        val P=cterm_of thy (abstract_over_fun_app trm);
-                        val thm = mk_fun_apply_eq trm thy;
-                        val PV = cterm_of thy (hd (OldTerm.term_vars (prop_of thm)));
-                        val thm' = cterm_instantiate [(PV,P)] thm;
-                       in SOME  thm' end handle TERM _ => NONE)
-                else NONE)
-       | _ => NONE))
-end
-
-fun prove_split_simp thy ss T prop =
-  let
-    val {sel_upd={simpset,...},extsplit,...} = RecordsData.get thy;
-    val extsplits =
-            Library.foldl (fn (thms,(n,_)) => the_list (Symtab.lookup extsplit n) @ thms)
-                    ([],dest_recTs T);
-    val thms = (case get_splits thy (rec_id (~1) T) of
-                   SOME (all_thm,_,_,_) =>
-                     all_thm::(case extsplits of [thm] => [] | _ => extsplits)
-                              (* [thm] is the same as all_thm *)
-                 | NONE => extsplits)
-    val thms'=K_comp_convs@thms;
-    val ss' = (Simplifier.inherit_context ss simpset
-                addsimps thms'
-                addsimprocs [record_split_f_more_simproc]);
-  in
-    quick_and_dirty_prove true thy [] prop (fn _ => simp_tac ss' 1)
-  end;
-
-
-local
-fun eq (s1:string) (s2:string) = (s1 = s2);
-fun has_field extfields f T =
-     exists (fn (eN,_) => exists (eq f o fst) (Symtab.lookup_list extfields eN))
-       (dest_recTs T);
-
-fun K_skeleton n (T as Type (_,[_,kT])) (b as Bound i) (Abs (x,xT,t)) =
-     if null (loose_bnos t) then ((n,kT),(Abs (x,xT,Bound (i+1)))) else ((n,T),b)
-  | K_skeleton n T b _ = ((n,T),b);
-
-(*
-fun K_skeleton n _ b ((K_rec as Const ("Record.K_record",Type (_,[kT,_])))$_) = 
-      ((n,kT),K_rec$b)
-  | K_skeleton n _ (Bound i) 
-      (Abs (x,T,(K_rec as Const ("Record.K_record",Type (_,[kT,_])))$_$Bound 0)) =
-        ((n,kT),Abs (x,T,(K_rec$Bound (i+1)$Bound 0)))
-  | K_skeleton n T b  _ = ((n,T),b);
- *)
-
-fun normalize_rhs thm =
-  let
-     val ss = HOL_basic_ss addsimps K_comp_convs; 
-     val rhs = thm |> Thm.cprop_of |> Thm.dest_comb |> snd;
-     val rhs' = (Simplifier.rewrite ss rhs);
-  in Thm.transitive thm rhs' end;
-in
-(* record_simproc *)
-(* Simplifies selections of an record update:
- *  (1)  S (S_update k r) = k (S r)
- *  (2)  S (X_update k r) = S r
- * The simproc skips multiple updates at once, eg:
- *  S (X_update x (Y_update y (S_update k r))) = k (S r)
- * But be careful in (2) because of the extendibility of records.
- * - If S is a more-selector we have to make sure that the update on component
- *   X does not affect the selected subrecord.
- * - If X is a more-selector we have to make sure that S is not in the updated
- *   subrecord.
- *)
-val record_simproc =
-  Simplifier.simproc @{theory HOL} "record_simp" ["x"]
-    (fn thy => fn ss => fn t =>
-      (case t of (sel as Const (s, Type (_,[domS,rangeS])))$
-                   ((upd as Const (u,Type(_,[_,Type (_,[rT,_])]))) $ k $ r)=>
-        if is_selector thy s then
-          (case get_updates thy u of SOME u_name =>
-            let
-              val {sel_upd={updates,...},extfields,...} = RecordsData.get thy;
-
-              fun mk_eq_terms ((upd as Const (u,Type(_,[kT,_]))) $ k $ r) =
-                  (case Symtab.lookup updates u of
-                     NONE => NONE
-                   | SOME u_name
-                     => if u_name = s
-                        then (case mk_eq_terms r of
-                               NONE =>
-                                 let
-                                   val rv = ("r",rT)
-                                   val rb = Bound 0
-                                   val (kv,kb) = K_skeleton "k" kT (Bound 1) k;
-                                  in SOME (upd$kb$rb,kb$(sel$rb),[kv,rv]) end
-                              | SOME (trm,trm',vars) =>
-                                 let
-                                   val (kv,kb) = K_skeleton "k" kT (Bound (length vars)) k;
-                                 in SOME (upd$kb$trm,kb$trm',kv::vars) end)
-                        else if has_field extfields u_name rangeS
-                             orelse has_field extfields s (domain_type kT)
-                             then NONE
-                             else (case mk_eq_terms r of
-                                     SOME (trm,trm',vars)
-                                     => let
-                                          val (kv,kb) = 
-                                                 K_skeleton "k" kT (Bound (length vars)) k;
-                                        in SOME (upd$kb$trm,trm',kv::vars) end
-                                   | NONE
-                                     => let
-                                          val rv = ("r",rT)
-                                          val rb = Bound 0
-                                          val (kv,kb) = K_skeleton "k" kT (Bound 1) k;
-                                        in SOME (upd$kb$rb,sel$rb,[kv,rv]) end))
-                | mk_eq_terms r = NONE
-            in
-              (case mk_eq_terms (upd$k$r) of
-                 SOME (trm,trm',vars)
-                 => SOME (prove_split_simp thy ss domS
-                                 (list_all(vars, Logic.mk_equals (sel $ trm, trm'))))
-               | NONE => NONE)
-            end
-          | NONE => NONE)
-        else NONE
-      | _ => NONE));
-
-(* record_upd_simproc *)
-(* simplify multiple updates:
- *  (1)  "N_update y (M_update g (N_update x (M_update f r))) =
-          (N_update (y o x) (M_update (g o f) r))"
- *  (2)  "r(|M:= M r|) = r"
- * For (2) special care of "more" updates has to be taken:
- *    r(|more := m; A := A r|)
- * If A is contained in the fields of m we cannot remove the update A := A r!
- * (But r(|more := r; A := A (r(|more := r|))|) = r(|more := r|)
-*)
-val record_upd_simproc =
-  Simplifier.simproc @{theory HOL} "record_upd_simp" ["x"]
-    (fn thy => fn ss => fn t =>
-      (case t of ((upd as Const (u, Type(_,[_,Type(_,[rT,_])]))) $ k $ r) =>
-         let datatype ('a,'b) calc = Init of 'b | Inter of 'a
-             val {sel_upd={selectors,updates,...},extfields,...} = RecordsData.get thy;
-
-             (*fun mk_abs_var x t = (x, fastype_of t);*)
-             fun sel_name u = Long_Name.base_name (unsuffix updateN u);
-
-             fun seed s (upd as Const (more,Type(_,[mT,_]))$ k $ r) =
-                  if has_field extfields s (domain_type' mT) then upd else seed s r
-               | seed _ r = r;
-
-             fun grow u uT k kT vars (sprout,skeleton) =
-                   if sel_name u = moreN
-                   then let val (kv,kb) = K_skeleton "k" kT (Bound (length vars)) k;
-                        in ((Const (u,uT)$k$sprout,Const (u,uT)$kb$skeleton),kv::vars) end
-                   else ((sprout,skeleton),vars);
-
-
-             fun dest_k (Abs (x,T,((sel as Const (s,_))$r))) =
-                  if null (loose_bnos r) then SOME (x,T,sel,s,r) else NONE
-               | dest_k (Abs (_,_,(Abs (x,T,((sel as Const (s,_))$r)))$Bound 0)) =
-                  (* eta expanded variant *)
-                  if null (loose_bnos r) then SOME (x,T,sel,s,r) else NONE
-               | dest_k _ = NONE;
-
-             fun is_upd_same (sprout,skeleton) u k =
-               (case dest_k k of SOME (x,T,sel,s,r) =>
-                   if (unsuffix updateN u) = s andalso (seed s sprout) = r
-                   then SOME (fn t => Abs (x,T,incr_boundvars 1 t),sel,seed s skeleton)
-                   else NONE
-                | NONE => NONE);
-
-             fun init_seed r = ((r,Bound 0), [("r", rT)]);
-
-             fun add (n:string) f fmaps =
-               (case AList.lookup (op =) fmaps n of
-                  NONE => AList.update (op =) (n,[f]) fmaps
-                | SOME fs => AList.update (op =) (n,f::fs) fmaps)
-
-             fun comps (n:string) T fmaps =
-               (case AList.lookup (op =) fmaps n of
-                 SOME fs =>
-                   foldr1 (fn (f,g) => Const ("Fun.comp",(T-->T)-->(T-->T)-->(T-->T))$f$g) fs
-                | NONE => error ("record_upd_simproc.comps"))
-
-             (* mk_updterm returns either
-              *  - Init (orig-term, orig-term-skeleton, vars) if no optimisation can be made,
-              *     where vars are the bound variables in the skeleton
-              *  - Inter (orig-term-skeleton,simplified-term-skeleton,
-              *           vars, (term-sprout, skeleton-sprout))
-              *     where "All vars. orig-term-skeleton = simplified-term-skeleton" is
-              *     the desired simplification rule,
-              *     the sprouts accumulate the "more-updates" on the way from the seed
-              *     to the outermost update. It is only relevant to calculate the
-              *     possible simplification for (2)
-              * The algorithm first walks down the updates to the seed-record while
-              * memorising the updates in the already-table. While walking up the
-              * updates again, the optimised term is constructed.
-              *)
-             fun mk_updterm upds already
-                 (t as ((upd as Const (u,uT as (Type (_,[kT,_])))) $ k $ r)) =
-                 if Symtab.defined upds u
-                 then let
-                         fun rest already = mk_updterm upds already
-                      in if u mem_string already
-                         then (case (rest already r) of
-                                 Init ((sprout,skel),vars) =>
-                                 let
-                                   val n = sel_name u;
-                                   val (kv,kb) = K_skeleton n kT (Bound (length vars)) k;
-                                   val (sprout',vars')= grow u uT k kT (kv::vars) (sprout,skel);
-                                 in Inter (upd$kb$skel,skel,vars',add n kb [],sprout') end
-                               | Inter (trm,trm',vars,fmaps,sprout) =>
-                                 let
-                                   val n = sel_name u;
-                                   val (kv,kb) = K_skeleton n kT (Bound (length vars)) k;
-                                   val (sprout',vars') = grow u uT k kT (kv::vars) sprout;
-                                 in Inter(upd$kb$trm,trm',kv::vars',add n kb fmaps,sprout')
-                                 end)
-                         else
-                          (case rest (u::already) r of
-                             Init ((sprout,skel),vars) =>
-                              (case is_upd_same (sprout,skel) u k of
-                                 SOME (K_rec,sel,skel') =>
-                                 let
-                                   val (sprout',vars') = grow u uT k kT vars (sprout,skel);
-                                  in Inter(upd$(K_rec (sel$skel'))$skel,skel,vars',[],sprout')
-                                  end
-                               | NONE =>
-                                 let
-                                   val n = sel_name u;
-                                   val (kv,kb) = K_skeleton n kT (Bound (length vars)) k;
-                                 in Init ((upd$k$sprout,upd$kb$skel),kv::vars) end)
-                           | Inter (trm,trm',vars,fmaps,sprout) =>
-                               (case is_upd_same sprout u k of
-                                  SOME (K_rec,sel,skel) =>
-                                  let
-                                    val (sprout',vars') = grow u uT k kT vars sprout
-                                  in Inter(upd$(K_rec (sel$skel))$trm,trm',vars',fmaps,sprout')
-                                  end
-                                | NONE =>
-                                  let
-                                    val n = sel_name u
-                                    val T = domain_type kT
-                                    val (kv,kb) = K_skeleton n kT (Bound (length vars)) k;
-                                    val (sprout',vars') = grow u uT k kT (kv::vars) sprout
-                                    val fmaps' = add n kb fmaps
-                                  in Inter (upd$kb$trm,upd$comps n T fmaps'$trm'
-                                           ,vars',fmaps',sprout') end))
-                     end
-                 else Init (init_seed t)
-               | mk_updterm _ _ t = Init (init_seed t);
-
-         in (case mk_updterm updates [] t of
-               Inter (trm,trm',vars,_,_)
-                => SOME (normalize_rhs 
-                          (prove_split_simp thy ss rT
-                            (list_all(vars, Logic.mk_equals (trm, trm')))))
-             | _ => NONE)
-         end
-       | _ => NONE))
-end
-
-(* record_eq_simproc *)
-(* looks up the most specific record-equality.
- * Note on efficiency:
- * Testing equality of records boils down to the test of equality of all components.
- * Therefore the complexity is: #components * complexity for single component.
- * Especially if a record has a lot of components it may be better to split up
- * the record first and do simplification on that (record_split_simp_tac).
- * e.g. r(|lots of updates|) = x
- *
- *               record_eq_simproc       record_split_simp_tac
- * Complexity: #components * #updates     #updates
- *
- *)
-val record_eq_simproc =
-  Simplifier.simproc @{theory HOL} "record_eq_simp" ["r = s"]
-    (fn thy => fn _ => fn t =>
-      (case t of Const ("op =", Type (_, [T, _])) $ _ $ _ =>
-        (case rec_id (~1) T of
-           "" => NONE
-         | name => (case get_equalities thy name of
-                                NONE => NONE
-                              | SOME thm => SOME (thm RS Eq_TrueI)))
-       | _ => NONE));
-
-(* record_split_simproc *)
-(* splits quantified occurrences of records, for which P holds. P can peek on the
- * subterm starting at the quantified occurrence of the record (including the quantifier)
- * P t = 0: do not split
- * P t = ~1: completely split
- * P t > 0: split up to given bound of record extensions
- *)
-fun record_split_simproc P =
-  Simplifier.simproc @{theory HOL} "record_split_simp" ["x"]
-    (fn thy => fn _ => fn t =>
-      (case t of (Const (quantifier, Type (_, [Type (_, [T, _]), _])))$trm =>
-         if quantifier = "All" orelse quantifier = "all" orelse quantifier = "Ex"
-         then (case rec_id (~1) T of
-                 "" => NONE
-               | name
-                  => let val split = P t
-                     in if split <> 0 then
-                        (case get_splits thy (rec_id split T) of
-                              NONE => NONE
-                            | SOME (all_thm, All_thm, Ex_thm,_)
-                               => SOME (case quantifier of
-                                          "all" => all_thm
-                                        | "All" => All_thm RS eq_reflection
-                                        | "Ex"  => Ex_thm RS eq_reflection
-                                        | _     => error "record_split_simproc"))
-                        else NONE
-                      end)
-         else NONE
-       | _ => NONE))
-
-val record_ex_sel_eq_simproc =
-  Simplifier.simproc @{theory HOL} "record_ex_sel_eq_simproc" ["Ex t"]
-    (fn thy => fn ss => fn t =>
-       let
-         fun prove prop =
-           quick_and_dirty_prove true thy [] prop
-             (fn _ => simp_tac (Simplifier.inherit_context ss (get_simpset thy)
-               addsimps simp_thms addsimprocs [record_split_simproc (K ~1)]) 1);
-
-         fun mkeq (lr,Teq,(sel,Tsel),x) i =
-              if is_selector thy sel then
-                 let val x' = if not (loose_bvar1 (x,0))
-                              then Free ("x" ^ string_of_int i, range_type Tsel)
-                              else raise TERM ("",[x]);
-                     val sel' = Const (sel,Tsel)$Bound 0;
-                     val (l,r) = if lr then (sel',x') else (x',sel');
-                  in Const ("op =",Teq)$l$r end
-              else raise TERM ("",[Const (sel,Tsel)]);
-
-         fun dest_sel_eq (Const ("op =",Teq)$(Const (sel,Tsel)$Bound 0)$X) =
-                           (true,Teq,(sel,Tsel),X)
-           | dest_sel_eq (Const ("op =",Teq)$X$(Const (sel,Tsel)$Bound 0)) =
-                           (false,Teq,(sel,Tsel),X)
-           | dest_sel_eq _ = raise TERM ("",[]);
-
-       in
-         (case t of
-           (Const ("Ex",Tex)$Abs(s,T,t)) =>
-             (let val eq = mkeq (dest_sel_eq t) 0;
-                 val prop = list_all ([("r",T)],
-                              Logic.mk_equals (Const ("Ex",Tex)$Abs(s,T,eq),
-                                               HOLogic.true_const));
-             in SOME (prove prop) end
-             handle TERM _ => NONE)
-          | _ => NONE)
-         end)
-
-
-
-
-local
-val inductive_atomize = thms "induct_atomize";
-val inductive_rulify = thms "induct_rulify";
-in
-(* record_split_simp_tac *)
-(* splits (and simplifies) all records in the goal for which P holds.
- * For quantified occurrences of a record
- * P can peek on the whole subterm (including the quantifier); for free variables P
- * can only peek on the variable itself.
- * P t = 0: do not split
- * P t = ~1: completely split
- * P t > 0: split up to given bound of record extensions
- *)
-fun record_split_simp_tac thms P i st =
-  let
-    val thy = Thm.theory_of_thm st;
-
-    val has_rec = exists_Const
-      (fn (s, Type (_, [Type (_, [T, _]), _])) =>
-          (s = "all" orelse s = "All" orelse s = "Ex") andalso is_recT T
-        | _ => false);
-
-    val goal = nth (Thm.prems_of st) (i - 1);
-    val frees = List.filter (is_recT o type_of) (OldTerm.term_frees goal);
-
-    fun mk_split_free_tac free induct_thm i =
-        let val cfree = cterm_of thy free;
-            val (_$(_$r)) = concl_of induct_thm;
-            val crec = cterm_of thy r;
-            val thm  = cterm_instantiate [(crec,cfree)] induct_thm;
-        in EVERY [simp_tac (HOL_basic_ss addsimps inductive_atomize) i,
-                  rtac thm i,
-                  simp_tac (HOL_basic_ss addsimps inductive_rulify) i]
-        end;
-
-    fun split_free_tac P i (free as Free (n,T)) =
-        (case rec_id (~1) T of
-           "" => NONE
-         | name => let val split = P free
-                   in if split <> 0 then
-                      (case get_splits thy (rec_id split T) of
-                             NONE => NONE
-                           | SOME (_,_,_,induct_thm)
-                               => SOME (mk_split_free_tac free induct_thm i))
-                      else NONE
-                   end)
-     | split_free_tac _ _ _ = NONE;
-
-    val split_frees_tacs = List.mapPartial (split_free_tac P i) frees;
-
-    val simprocs = if has_rec goal then [record_split_simproc P] else [];
-    val thms' = K_comp_convs@thms
-  in st |> ((EVERY split_frees_tacs)
-           THEN (Simplifier.full_simp_tac (get_simpset thy addsimps thms' addsimprocs simprocs) i))
-  end handle Empty => Seq.empty;
-end;
-
-
-(* record_split_tac *)
-(* splits all records in the goal, which are quantified by ! or !!. *)
-fun record_split_tac i st =
-  let
-    val thy = Thm.theory_of_thm st;
-
-    val has_rec = exists_Const
-      (fn (s, Type (_, [Type (_, [T, _]), _])) =>
-          (s = "all" orelse s = "All") andalso is_recT T
-        | _ => false);
-
-    val goal = nth (Thm.prems_of st) (i - 1);
-
-    fun is_all t =
-      (case t of (Const (quantifier, _)$_) =>
-         if quantifier = "All" orelse quantifier = "all" then ~1 else 0
-       | _ => 0);
-
-  in if has_rec goal
-     then Simplifier.full_simp_tac
-           (HOL_basic_ss addsimprocs [record_split_simproc is_all]) i st
-     else Seq.empty
-  end handle Subscript => Seq.empty;
-
-(* wrapper *)
-
-val record_split_name = "record_split_tac";
-val record_split_wrapper = (record_split_name, fn tac => record_split_tac ORELSE' tac);
-
-
-
-(** theory extender interface **)
-
-(* prepare arguments *)
-
-fun read_raw_parent ctxt raw_T =
-  (case ProofContext.read_typ_abbrev ctxt raw_T of
-    Type (name, Ts) => (Ts, name)
-  | T => error ("Bad parent record specification: " ^ Syntax.string_of_typ ctxt T));
-
-fun read_typ ctxt raw_T env =
-  let
-    val ctxt' = fold (Variable.declare_typ o TFree) env ctxt;
-    val T = Syntax.read_typ ctxt' raw_T;
-    val env' = OldTerm.add_typ_tfrees (T, env);
-  in (T, env') end;
-
-fun cert_typ ctxt raw_T env =
-  let
-    val thy = ProofContext.theory_of ctxt;
-    val T = Type.no_tvars (Sign.certify_typ thy raw_T) handle TYPE (msg, _, _) => error msg;
-    val env' = OldTerm.add_typ_tfrees (T, env);
-  in (T, env') end;
-
-
-(* attributes *)
-
-fun case_names_fields x = RuleCases.case_names ["fields"] x;
-fun induct_type_global name = [case_names_fields, Induct.induct_type name];
-fun cases_type_global name = [case_names_fields, Induct.cases_type name];
-
-(* tactics *)
-
-fun simp_all_tac ss simps = ALLGOALS (Simplifier.asm_full_simp_tac (ss addsimps simps));
-
-(* do case analysis / induction according to rule on last parameter of ith subgoal
- * (or on s if there are no parameters);
- * Instatiation of record variable (and predicate) in rule is calculated to
- * avoid problems with higher order unification.
- *)
-
-fun try_param_tac s rule i st =
-  let
-    val cert = cterm_of (Thm.theory_of_thm st);
-    val g = nth (prems_of st) (i - 1);
-    val params = Logic.strip_params g;
-    val concl = HOLogic.dest_Trueprop (Logic.strip_assums_concl g);
-    val rule' = Thm.lift_rule (Thm.cprem_of st i) rule;
-    val (P, ys) = strip_comb (HOLogic.dest_Trueprop
-      (Logic.strip_assums_concl (prop_of rule')));
-    (* ca indicates if rule is a case analysis or induction rule *)
-    val (x, ca) = (case rev (Library.drop (length params, ys)) of
-        [] => (head_of (fst (HOLogic.dest_eq (HOLogic.dest_Trueprop
-          (hd (rev (Logic.strip_assums_hyp (hd (prems_of rule')))))))), true)
-      | [x] => (head_of x, false));
-    val rule'' = cterm_instantiate (map (pairself cert) (case (rev params) of
-        [] => (case AList.lookup (op =) (map dest_Free (OldTerm.term_frees (prop_of st))) s of
-          NONE => sys_error "try_param_tac: no such variable"
-        | SOME T => [(P, if ca then concl else lambda (Free (s, T)) concl),
-            (x, Free (s, T))])
-      | (_, T) :: _ => [(P, list_abs (params, if ca then concl
-          else incr_boundvars 1 (Abs (s, T, concl)))),
-        (x, list_abs (params, Bound 0))])) rule'
-  in compose_tac (false, rule'', nprems_of rule) i st end;
-
-
-(* !!x1 ... xn. ... ==> EX x1 ... xn. P x1 ... xn;
-   instantiates x1 ... xn with parameters x1 ... xn *)
-fun ex_inst_tac i st =
-  let
-    val thy = Thm.theory_of_thm st;
-    val g = nth (prems_of st) (i - 1);
-    val params = Logic.strip_params g;
-    val exI' = Thm.lift_rule (Thm.cprem_of st i) exI;
-    val (_$(_$x)) = Logic.strip_assums_concl (hd (prems_of exI'));
-    val cx = cterm_of thy (fst (strip_comb x));
-
-  in Seq.single (Library.foldl (fn (st,v) =>
-        Seq.hd
-        (compose_tac (false, cterm_instantiate
-                                [(cx,cterm_of thy (list_abs (params,Bound v)))] exI',1)
-                i st)) (st,((length params) - 1) downto 0))
-  end;
-
-fun extension_typedef name repT alphas thy =
-  let
-    fun get_thms thy name =
-      let
-        val SOME { Abs_induct = abs_induct,
-          Abs_inject=abs_inject, Abs_inverse = abs_inverse, ...} = TypedefPackage.get_info thy name;
-        val rewrite_rule = MetaSimplifier.rewrite_rule [rec_UNIV_I, rec_True_simp];
-      in map rewrite_rule [abs_inject, abs_inverse, abs_induct] end;
-    val tname = Binding.name (Long_Name.base_name name);
-  in
-    thy
-    |> TypecopyPackage.typecopy (Binding.suffix_name ext_typeN tname, alphas) repT NONE
-    |-> (fn (name, _) => `(fn thy => get_thms thy name))
-  end;
-
-fun mixit convs refls =
-  let fun f ((res,lhs,rhs),refl) = ((refl,List.revAppend (lhs,refl::tl rhs))::res,hd rhs::lhs,tl rhs);
-  in #1 (Library.foldl f (([],[],convs),refls)) end;
-
-
-fun extension_definition full name fields names alphas zeta moreT more vars thy =
-  let
-    val base = Long_Name.base_name;
-    val fieldTs = (map snd fields);
-    val alphas_zeta = alphas@[zeta];
-    val alphas_zetaTs = map (fn n => TFree (n, HOLogic.typeS)) alphas_zeta;
-    val vT = TFree (Name.variant alphas_zeta "'v", HOLogic.typeS);
-    val extT_name = suffix ext_typeN name
-    val extT = Type (extT_name, alphas_zetaTs);
-    val repT = foldr1 HOLogic.mk_prodT (fieldTs@[moreT]);
-    val fields_more = fields@[(full moreN,moreT)];
-    val fields_moreTs = fieldTs@[moreT];
-    val bfields_more = map (apfst base) fields_more;
-    val r = Free (rN,extT)
-    val len = length fields;
-    val idxms = 0 upto len;
-
-    (* prepare declarations and definitions *)
-
-    (*fields constructor*)
-    val ext_decl = (mk_extC (name,extT) fields_moreTs);
-    (*
-    val ext_spec = Const ext_decl :==
-         (foldr (uncurry lambda)
-            (mk_Abs name repT extT $ (foldr1 HOLogic.mk_prod (vars@[more]))) (vars@[more]))
-    *)
-    val ext_spec = list_comb (Const ext_decl,vars@[more]) :==
-         (mk_Abs name repT extT $ (foldr1 HOLogic.mk_prod (vars@[more])));
-
-    fun mk_ext args = list_comb (Const ext_decl, args);
-
-    (*destructors*)
-    val _ = timing_msg "record extension preparing definitions";
-    val dest_decls = map (mk_selC extT o (apfst (suffix ext_dest))) bfields_more;
-
-    fun mk_dest_spec (i, (c,T)) =
-      let val snds = (funpow i HOLogic.mk_snd (mk_Rep name repT extT $ r))
-      in Const (mk_selC extT (suffix ext_dest c,T))
-         :== (lambda r (if i=len then snds else HOLogic.mk_fst snds))
-      end;
-    val dest_specs =
-      ListPair.map mk_dest_spec (idxms, fields_more);
-
-    (*updates*)
-    val upd_decls = map (mk_updC updN extT) bfields_more;
-    fun mk_upd_spec (c,T) =
-      let
-        val args = map (fn (n,nT) => if n=c then Free (base c,T --> T)$
-                                                  (mk_sel r (suffix ext_dest n,nT))
-                                     else (mk_sel r (suffix ext_dest n,nT)))
-                       fields_more;
-      in Const (mk_updC updN extT (c,T))$(Free (base c,T --> T))$r
-          :== mk_ext args
-      end;
-    val upd_specs = map mk_upd_spec fields_more;
-
-    (* 1st stage: defs_thy *)
-    fun mk_defs () =
-      thy
-      |> extension_typedef name repT (alphas @ [zeta])
-      ||> Sign.add_consts_i
-            (map (Syntax.no_syn o apfst Binding.name) (apfst base ext_decl :: dest_decls @ upd_decls))
-      ||>> PureThy.add_defs false
-            (map (Thm.no_attributes o apfst Binding.name) (ext_spec :: dest_specs))
-      ||>> PureThy.add_defs false
-            (map (Thm.no_attributes o apfst Binding.name) upd_specs)
-      |-> (fn args as ((_, dest_defs), upd_defs) =>
-          fold Code.add_default_eqn dest_defs
-          #> fold Code.add_default_eqn upd_defs
-          #> pair args);
-    val ((([abs_inject, abs_inverse, abs_induct], ext_def :: dest_defs), upd_defs), defs_thy) =
-      timeit_msg "record extension type/selector/update defs:" mk_defs;
-
-    (* prepare propositions *)
-    val _ = timing_msg "record extension preparing propositions";
-    val vars_more = vars@[more];
-    val named_vars_more = (names@[full moreN])~~vars_more;
-    val variants = map (fn (Free (x,_))=>x) vars_more;
-    val ext = mk_ext vars_more;
-    val s     = Free (rN, extT);
-    val w     = Free (wN, extT);
-    val P = Free (Name.variant variants "P", extT-->HOLogic.boolT);
-    val C = Free (Name.variant variants "C", HOLogic.boolT);
-
-    val inject_prop =
-      let val vars_more' = map (fn (Free (x,T)) => Free (x ^ "'",T)) vars_more;
-      in All (map dest_Free (vars_more@vars_more'))
-          ((HOLogic.eq_const extT $
-            mk_ext vars_more$mk_ext vars_more')
-           ===
-           foldr1 HOLogic.mk_conj (map HOLogic.mk_eq (vars_more ~~ vars_more')))
-      end;
-
-    val induct_prop =
-      (All (map dest_Free vars_more) (Trueprop (P $ ext)), Trueprop (P $ s));
-
-    val cases_prop =
-      (All (map dest_Free vars_more)
-        (Trueprop (HOLogic.mk_eq (s,ext)) ==> Trueprop C))
-      ==> Trueprop C;
-
-    (*destructors*)
-    val dest_conv_props =
-       map (fn (c, x as Free (_,T)) => mk_sel ext (suffix ext_dest c,T) === x) named_vars_more;
-
-    (*updates*)
-    fun mk_upd_prop (i,(c,T)) =
-      let val x' = Free (Name.variant variants (base c ^ "'"),T --> T)
-          val args' = nth_map i  (K (x'$nth vars_more i)) vars_more
-      in mk_upd updN c x' ext === mk_ext args'  end;
-    val upd_conv_props = ListPair.map mk_upd_prop (idxms, fields_more);
-
-    val surjective_prop =
-      let val args =
-           map (fn (c, Free (_,T)) => mk_sel s (suffix ext_dest c,T)) named_vars_more;
-      in s === mk_ext args end;
-
-    val split_meta_prop =
-      let val P = Free (Name.variant variants "P", extT-->Term.propT) in
-        Logic.mk_equals
-         (All [dest_Free s] (P $ s), All (map dest_Free vars_more) (P $ ext))
-      end;
-
-    fun prove stndrd = quick_and_dirty_prove stndrd defs_thy;
-    val prove_standard = quick_and_dirty_prove true defs_thy;
-    fun prove_simp stndrd simps =
-      let val tac = simp_all_tac HOL_ss simps
-      in fn prop => prove stndrd [] prop (K tac) end;
-
-    fun inject_prf () = (prove_simp true [ext_def,abs_inject,Pair_eq] inject_prop);
-    val inject = timeit_msg "record extension inject proof:" inject_prf;
-
-    fun induct_prf () =
-      let val (assm, concl) = induct_prop
-      in prove_standard [assm] concl (fn {prems, ...} =>
-           EVERY [try_param_tac rN abs_induct 1,
-                  simp_tac (HOL_ss addsimps [split_paired_all]) 1,
-                  resolve_tac (map (rewrite_rule [ext_def]) prems) 1])
-      end;
-    val induct = timeit_msg "record extension induct proof:" induct_prf;
-
-    fun cases_prf_opt () =
-      let
-        val (_$(Pvar$_)) = concl_of induct;
-        val ind = cterm_instantiate
-                    [(cterm_of defs_thy Pvar, cterm_of defs_thy
-                            (lambda w (HOLogic.imp$HOLogic.mk_eq(r,w)$C)))]
-                    induct;
-        in standard (ObjectLogic.rulify (mp OF [ind, refl])) end;
-
-    fun cases_prf_noopt () =
-        prove_standard [] cases_prop (fn _ =>
-         EVERY [asm_full_simp_tac (HOL_basic_ss addsimps [atomize_all, atomize_imp]) 1,
-                try_param_tac rN induct 1,
-                rtac impI 1,
-                REPEAT (etac allE 1),
-                etac mp 1,
-                rtac refl 1])
-
-    val cases_prf = quick_and_dirty_prf cases_prf_noopt cases_prf_opt;
-    val cases = timeit_msg "record extension cases proof:" cases_prf;
-
-    fun dest_convs_prf () = map (prove_simp false
-                      ([ext_def,abs_inverse]@Pair_sel_convs@dest_defs)) dest_conv_props;
-    val dest_convs = timeit_msg "record extension dest_convs proof:" dest_convs_prf;
-    fun dest_convs_standard_prf () = map standard dest_convs;
-
-    val dest_convs_standard =
-        timeit_msg "record extension dest_convs_standard proof:" dest_convs_standard_prf;
-
-    fun upd_convs_prf_noopt () = map (prove_simp true (dest_convs_standard@upd_defs))
-                                       upd_conv_props;
-    fun upd_convs_prf_opt () =
-      let
-
-        fun mkrefl (c,T) = Thm.reflexive
-                    (cterm_of defs_thy (Free (Name.variant variants (base c ^ "'"),T-->T)));
-        val refls = map mkrefl fields_more;
-        val dest_convs' = map mk_meta_eq dest_convs;
-        val map_eqs = map (uncurry Thm.combination) (refls ~~ dest_convs');
-
-        val constr_refl = Thm.reflexive (cterm_of defs_thy (head_of ext));
-
-        fun mkthm (udef,(fld_refl,thms)) =
-          let val bdyeq = Library.foldl (uncurry Thm.combination) (constr_refl,thms);
-               (* (|N=N (|N=N,M=M,K=K,more=more|)
-                    M=M (|N=N,M=M,K=K,more=more|)
-                    K=K'
-                    more = more (|N=N,M=M,K=K,more=more|) =
-                  (|N=N,M=M,K=K',more=more|)
-                *)
-              val (_$(_$v$r)$_) = prop_of udef;
-              val (_$(v'$_)$_) = prop_of fld_refl;
-              val udef' = cterm_instantiate
-                            [(cterm_of defs_thy v,cterm_of defs_thy v'),
-                             (cterm_of defs_thy r,cterm_of defs_thy ext)] udef;
-          in  standard (Thm.transitive udef' bdyeq) end;
-      in map mkthm (rev upd_defs  ~~ (mixit dest_convs' map_eqs)) end;
-
-    val upd_convs_prf = quick_and_dirty_prf upd_convs_prf_noopt upd_convs_prf_opt;
-
-    val upd_convs =
-         timeit_msg "record extension upd_convs proof:" upd_convs_prf;
-
-    fun surjective_prf () =
-      prove_standard [] surjective_prop (fn _ =>
-          (EVERY [try_param_tac rN induct 1,
-                  simp_tac (HOL_basic_ss addsimps dest_convs_standard) 1]));
-    val surjective = timeit_msg "record extension surjective proof:" surjective_prf;
-
-    fun split_meta_prf () =
-        prove_standard [] split_meta_prop (fn _ =>
-         EVERY [rtac equal_intr_rule 1, Goal.norm_hhf_tac 1,
-                etac meta_allE 1, atac 1,
-                rtac (prop_subst OF [surjective]) 1,
-                REPEAT (etac meta_allE 1), atac 1]);
-    val split_meta = timeit_msg "record extension split_meta proof:" split_meta_prf;
-
-
-    val (([inject',induct',cases',surjective',split_meta'],
-          [dest_convs',upd_convs']),
-      thm_thy) =
-      defs_thy
-      |> (PureThy.add_thms o map (Thm.no_attributes o apfst Binding.name))
-           [("ext_inject", inject),
-            ("ext_induct", induct),
-            ("ext_cases", cases),
-            ("ext_surjective", surjective),
-            ("ext_split", split_meta)]
-      ||>> (PureThy.add_thmss o map (Thm.no_attributes o apfst Binding.name))
-            [("dest_convs", dest_convs_standard), ("upd_convs", upd_convs)]
-
-  in (thm_thy,extT,induct',inject',dest_convs',split_meta',upd_convs')
-  end;
-
-fun chunks []      []   = []
-  | chunks []      xs   = [xs]
-  | chunks (l::ls) xs  = Library.take (l,xs)::chunks ls (Library.drop (l,xs));
-
-fun chop_last [] = error "last: list should not be empty"
-  | chop_last [x] = ([],x)
-  | chop_last (x::xs) = let val (tl,l) = chop_last xs in (x::tl,l) end;
-
-fun subst_last s []      = error "subst_last: list should not be empty"
-  | subst_last s ([x])   = [s]
-  | subst_last s (x::xs) = (x::subst_last s xs);
-
-(* mk_recordT builds up the record type from the current extension tpye extT and a list
- * of parent extensions, starting with the root of the record hierarchy
-*)
-fun mk_recordT extT =
-    fold_rev (fn (parent, Ts) => fn T => Type (parent, subst_last T Ts)) extT;
-
-
-
-fun obj_to_meta_all thm =
-  let
-    fun E thm = case (SOME (spec OF [thm]) handle THM _ => NONE) of
-                  SOME thm' => E thm'
-                | NONE => thm;
-    val th1 = E thm;
-    val th2 = Drule.forall_intr_vars th1;
-  in th2 end;
-
-fun meta_to_obj_all thm =
-  let
-    val thy = Thm.theory_of_thm thm;
-    val prop = Thm.prop_of thm;
-    val params = Logic.strip_params prop;
-    val concl = HOLogic.dest_Trueprop (Logic.strip_assums_concl prop);
-    val ct = cterm_of thy
-      (HOLogic.mk_Trueprop (HOLogic.list_all (params, concl)));
-    val thm' = Seq.hd (REPEAT (rtac allI 1) (Thm.trivial ct));
-  in
-    Thm.implies_elim thm' thm
-  end;
-
-
-
-(* record_definition *)
-
-fun record_definition (args, bname) parent (parents: parent_info list) raw_fields thy =
-  let
-    val external_names = NameSpace.external_names (Sign.naming_of thy);
-
-    val alphas = map fst args;
-    val name = Sign.full_bname thy bname;
-    val full = Sign.full_bname_path thy bname;
-    val base = Long_Name.base_name;
-
-    val (bfields, field_syntax) = split_list (map (fn (x, T, mx) => ((x, T), mx)) raw_fields);
-
-    val parent_fields = List.concat (map #fields parents);
-    val parent_chunks = map (length o #fields) parents;
-    val parent_names = map fst parent_fields;
-    val parent_types = map snd parent_fields;
-    val parent_fields_len = length parent_fields;
-    val parent_variants = Name.variant_list [moreN, rN, rN ^ "'", wN] (map base parent_names);
-    val parent_vars = ListPair.map Free (parent_variants, parent_types);
-    val parent_len = length parents;
-    val parents_idx = (map #name parents) ~~ (0 upto (parent_len - 1));
-
-    val fields = map (apfst full) bfields;
-    val names = map fst fields;
-    val extN = full bname;
-    val types = map snd fields;
-    val alphas_fields = List.foldr OldTerm.add_typ_tfree_names [] types;
-    val alphas_ext = alphas inter alphas_fields;
-    val len = length fields;
-    val variants =
-      Name.variant_list (moreN :: rN :: (rN ^ "'") :: wN :: parent_variants) (map fst bfields);
-    val vars = ListPair.map Free (variants, types);
-    val named_vars = names ~~ vars;
-    val idxs = 0 upto (len - 1);
-    val idxms = 0 upto len;
-
-    val all_fields = parent_fields @ fields;
-    val all_names = parent_names @ names;
-    val all_types = parent_types @ types;
-    val all_len = parent_fields_len + len;
-    val all_variants = parent_variants @ variants;
-    val all_vars = parent_vars @ vars;
-    val all_named_vars = (parent_names ~~ parent_vars) @ named_vars;
-
-
-    val zeta = Name.variant alphas "'z";
-    val moreT = TFree (zeta, HOLogic.typeS);
-    val more = Free (moreN, moreT);
-    val full_moreN = full moreN;
-    val bfields_more = bfields @ [(moreN,moreT)];
-    val fields_more = fields @ [(full_moreN,moreT)];
-    val vars_more = vars @ [more];
-    val named_vars_more = named_vars @[(full_moreN,more)];
-    val all_vars_more = all_vars @ [more];
-    val all_named_vars_more = all_named_vars @ [(full_moreN,more)];
-
-    (* 1st stage: extension_thy *)
-    val (extension_thy,extT,ext_induct,ext_inject,ext_dest_convs,ext_split,u_convs) =
-      thy
-      |> Sign.add_path bname
-      |> extension_definition full extN fields names alphas_ext zeta moreT more vars;
-
-    val _ = timing_msg "record preparing definitions";
-    val Type extension_scheme = extT;
-    val extension_name = unsuffix ext_typeN (fst extension_scheme);
-    val extension = let val (n,Ts) = extension_scheme in (n,subst_last HOLogic.unitT Ts) end;
-    val extension_names =
-         (map ((unsuffix ext_typeN) o fst o #extension) parents) @ [extN];
-    val extension_id = Library.foldl (op ^) ("",extension_names);
-
-
-    fun rec_schemeT n = mk_recordT (map #extension (prune n parents)) extT;
-    val rec_schemeT0 = rec_schemeT 0;
-
-    fun recT n =
-      let val (c,Ts) = extension
-      in mk_recordT (map #extension (prune n parents)) (Type (c,subst_last HOLogic.unitT Ts))
-      end;
-    val recT0 = recT 0;
-
-    fun mk_rec args n =
-      let val (args',more) = chop_last args;
-          fun mk_ext' (((name,T),args),more) = mk_ext (name,T) (args@[more]);
-          fun build Ts =
-           List.foldr mk_ext' more (prune n (extension_names ~~ Ts ~~ (chunks parent_chunks args')))
-      in
-        if more = HOLogic.unit
-        then build (map recT (0 upto parent_len))
-        else build (map rec_schemeT (0 upto parent_len))
-      end;
-
-    val r_rec0 = mk_rec all_vars_more 0;
-    val r_rec_unit0 = mk_rec (all_vars@[HOLogic.unit]) 0;
-
-    fun r n = Free (rN, rec_schemeT n)
-    val r0 = r 0;
-    fun r_unit n = Free (rN, recT n)
-    val r_unit0 = r_unit 0;
-    val w = Free (wN, rec_schemeT 0)
-
-    (* prepare print translation functions *)
-    val field_tr's =
-      print_translation (distinct (op =) (maps external_names (full_moreN :: names)));
-
-    val adv_ext_tr's =
-    let
-      val trnames = external_names extN;
-    in map (gen_record_tr') trnames end;
-
-    val adv_record_type_abbr_tr's =
-      let val trnames = external_names (hd extension_names);
-          val lastExt = unsuffix ext_typeN (fst extension);
-      in map (gen_record_type_abbr_tr' name alphas zeta lastExt rec_schemeT0) trnames
-      end;
-
-    val adv_record_type_tr's =
-      let val trnames = if parent_len > 0 then external_names extN else [];
-                        (* avoid conflict with adv_record_type_abbr_tr's *)
-      in map (gen_record_type_tr') trnames
-      end;
-
-
-    (* prepare declarations *)
-
-    val sel_decls = map (mk_selC rec_schemeT0) bfields_more;
-    val upd_decls = map (mk_updC updateN rec_schemeT0) bfields_more;
-    val make_decl = (makeN, all_types ---> recT0);
-    val fields_decl = (fields_selN, types ---> Type extension);
-    val extend_decl = (extendN, recT0 --> moreT --> rec_schemeT0);
-    val truncate_decl = (truncateN, rec_schemeT0 --> recT0);
-
-    (* prepare definitions *)
-
-    fun parent_more s =
-         if null parents then s
-         else mk_sel s (Long_Name.qualify (#name (List.last parents)) moreN, extT);
-
-    fun parent_more_upd v s =
-      if null parents then v$s
-      else let val mp = Long_Name.qualify (#name (List.last parents)) moreN;
-           in mk_upd updateN mp v s end;
-
-    (*record (scheme) type abbreviation*)
-    val recordT_specs =
-      [(Binding.name (suffix schemeN bname), alphas @ [zeta], rec_schemeT0, Syntax.NoSyn),
-        (Binding.name bname, alphas, recT0, Syntax.NoSyn)];
-
-    (*selectors*)
-    fun mk_sel_spec (c,T) =
-         Const (mk_selC rec_schemeT0 (c,T))
-          :== (lambda r0 (Const (mk_selC extT (suffix ext_dest c,T))$parent_more r0));
-    val sel_specs = map mk_sel_spec fields_more;
-
-    (*updates*)
-
-    fun mk_upd_spec (c,T) =
-      let
-        val new = mk_upd' updN c (Free (base c,T-->T)) extT(*(parent_more r0)*);
-      in Const (mk_updC updateN rec_schemeT0 (c,T))$(Free (base c,T-->T))$r0
-          :== (parent_more_upd new r0)
-      end;
-    val upd_specs = map mk_upd_spec fields_more;
-
-    (*derived operations*)
-    val make_spec = Const (full makeN, all_types ---> recT0) $$ all_vars :==
-      mk_rec (all_vars @ [HOLogic.unit]) 0;
-    val fields_spec = Const (full fields_selN, types ---> Type extension) $$ vars :==
-      mk_rec (all_vars @ [HOLogic.unit]) parent_len;
-    val extend_spec =
-      Const (full extendN, recT0-->moreT-->rec_schemeT0) $ r_unit0 $ more :==
-      mk_rec ((map (mk_sel r_unit0) all_fields) @ [more]) 0;
-    val truncate_spec = Const (full truncateN, rec_schemeT0 --> recT0) $ r0 :==
-      mk_rec ((map (mk_sel r0) all_fields) @ [HOLogic.unit]) 0;
-
-    (* 2st stage: defs_thy *)
-
-    fun mk_defs () =
-      extension_thy
-      |> Sign.add_trfuns
-          ([],[],field_tr's, [])
-      |> Sign.add_advanced_trfuns
-          ([],[],adv_ext_tr's @ adv_record_type_tr's @ adv_record_type_abbr_tr's,[])
-      |> Sign.parent_path
-      |> Sign.add_tyabbrs_i recordT_specs
-      |> Sign.add_path bname
-      |> Sign.add_consts_i
-          (map2 (fn (x, T) => fn mx => (Binding.name x, T, mx))
-            sel_decls (field_syntax @ [Syntax.NoSyn]))
-      |> (Sign.add_consts_i o map (fn (x, T) => (Binding.name x, T, Syntax.NoSyn)))
-          (upd_decls @ [make_decl, fields_decl, extend_decl, truncate_decl])
-      |> ((PureThy.add_defs false o map (Thm.no_attributes o apfst Binding.name)) sel_specs)
-      ||>> ((PureThy.add_defs false o map (Thm.no_attributes o apfst Binding.name)) upd_specs)
-      ||>> ((PureThy.add_defs false o map (Thm.no_attributes o apfst Binding.name))
-             [make_spec, fields_spec, extend_spec, truncate_spec])
-      |-> (fn defs as ((sel_defs, upd_defs), derived_defs) =>
-          fold Code.add_default_eqn sel_defs
-          #> fold Code.add_default_eqn upd_defs
-          #> fold Code.add_default_eqn derived_defs
-          #> pair defs)
-    val (((sel_defs, upd_defs), derived_defs), defs_thy) =
-      timeit_msg "record trfuns/tyabbrs/selectors/updates/make/fields/extend/truncate defs:"
-        mk_defs;
-
-
-    (* prepare propositions *)
-    val _ = timing_msg "record preparing propositions";
-    val P = Free (Name.variant all_variants "P", rec_schemeT0-->HOLogic.boolT);
-    val C = Free (Name.variant all_variants "C", HOLogic.boolT);
-    val P_unit = Free (Name.variant all_variants "P", recT0-->HOLogic.boolT);
-
-    (*selectors*)
-    val sel_conv_props =
-       map (fn (c, x as Free (_,T)) => mk_sel r_rec0 (c,T) === x) named_vars_more;
-
-    (*updates*)
-    fun mk_upd_prop (i,(c,T)) =
-      let val x' = Free (Name.variant all_variants (base c ^ "'"),T-->T);
-          val n = parent_fields_len + i;
-          val args' = nth_map n (K (x'$nth all_vars_more n)) all_vars_more
-      in mk_upd updateN c x' r_rec0 === mk_rec args' 0  end;
-    val upd_conv_props = ListPair.map mk_upd_prop (idxms, fields_more);
-
-    (*induct*)
-    val induct_scheme_prop =
-      All (map dest_Free all_vars_more) (Trueprop (P $ r_rec0)) ==> Trueprop (P $ r0);
-    val induct_prop =
-      (All (map dest_Free all_vars) (Trueprop (P_unit $ r_rec_unit0)),
-       Trueprop (P_unit $ r_unit0));
-
-    (*surjective*)
-    val surjective_prop =
-      let val args = map (fn (c,Free (_,T)) => mk_sel r0 (c,T)) all_named_vars_more
-      in r0 === mk_rec args 0 end;
-
-    (*cases*)
-    val cases_scheme_prop =
-      (All (map dest_Free all_vars_more)
-        (Trueprop (HOLogic.mk_eq (r0,r_rec0)) ==> Trueprop C))
-      ==> Trueprop C;
-
-    val cases_prop =
-      (All (map dest_Free all_vars)
-        (Trueprop (HOLogic.mk_eq (r_unit0,r_rec_unit0)) ==> Trueprop C))
-       ==> Trueprop C;
-
-    (*split*)
-    val split_meta_prop =
-      let val P = Free (Name.variant all_variants "P", rec_schemeT0-->Term.propT) in
-        Logic.mk_equals
-         (All [dest_Free r0] (P $ r0), All (map dest_Free all_vars_more) (P $ r_rec0))
-      end;
-
-    val split_object_prop =
-      let fun ALL vs t = List.foldr (fn ((v,T),t) => HOLogic.mk_all (v,T,t)) t vs
-      in (ALL [dest_Free r0] (P $ r0)) === (ALL (map dest_Free all_vars_more) (P $ r_rec0))
-      end;
-
-
-    val split_ex_prop =
-      let fun EX vs t = List.foldr (fn ((v,T),t) => HOLogic.mk_exists (v,T,t)) t vs
-      in (EX [dest_Free r0] (P $ r0)) === (EX (map dest_Free all_vars_more) (P $ r_rec0))
-      end;
-
-    (*equality*)
-    val equality_prop =
-      let
-        val s' = Free (rN ^ "'", rec_schemeT0)
-        fun mk_sel_eq (c,Free (_,T)) =  mk_sel r0 (c,T) === mk_sel s' (c,T)
-        val seleqs = map mk_sel_eq all_named_vars_more
-      in All (map dest_Free [r0,s']) (Logic.list_implies (seleqs,r0 === s')) end;
-
-    (* 3rd stage: thms_thy *)
-
-    fun prove stndrd = quick_and_dirty_prove stndrd defs_thy;
-    val prove_standard = quick_and_dirty_prove true defs_thy;
-
-    fun prove_simp stndrd ss simps =
-      let val tac = simp_all_tac ss simps
-      in fn prop => prove stndrd [] prop (K tac) end;
-
-    val ss = get_simpset defs_thy;
-
-    fun sel_convs_prf () = map (prove_simp false ss
-                           (sel_defs@ext_dest_convs)) sel_conv_props;
-    val sel_convs = timeit_msg "record sel_convs proof:" sel_convs_prf;
-    fun sel_convs_standard_prf () = map standard sel_convs
-    val sel_convs_standard =
-          timeit_msg "record sel_convs_standard proof:" sel_convs_standard_prf;
-
-    fun upd_convs_prf () =
-          map (prove_simp true ss (upd_defs@u_convs)) upd_conv_props;
-
-    val upd_convs = timeit_msg "record upd_convs proof:" upd_convs_prf;
-
-    val parent_induct = if null parents then [] else [#induct (hd (rev parents))];
-
-    fun induct_scheme_prf () = prove_standard [] induct_scheme_prop (fn _ =>
-          (EVERY [if null parent_induct
-                  then all_tac else try_param_tac rN (hd parent_induct) 1,
-                  try_param_tac rN ext_induct 1,
-                  asm_simp_tac HOL_basic_ss 1]));
-    val induct_scheme = timeit_msg "record induct_scheme proof:" induct_scheme_prf;
-
-    fun induct_prf () =
-      let val (assm, concl) = induct_prop;
-      in
-        prove_standard [assm] concl (fn {prems, ...} =>
-          try_param_tac rN induct_scheme 1
-          THEN try_param_tac "more" @{thm unit.induct} 1
-          THEN resolve_tac prems 1)
-      end;
-    val induct = timeit_msg "record induct proof:" induct_prf;
-
-    fun surjective_prf () =
-      prove_standard [] surjective_prop (fn prems =>
-          (EVERY [try_param_tac rN induct_scheme 1,
-                  simp_tac (ss addsimps sel_convs_standard) 1]))
-    val surjective = timeit_msg "record surjective proof:" surjective_prf;
-
-    fun cases_scheme_prf_opt () =
-      let
-        val (_$(Pvar$_)) = concl_of induct_scheme;
-        val ind = cterm_instantiate
-                    [(cterm_of defs_thy Pvar, cterm_of defs_thy
-                            (lambda w (HOLogic.imp$HOLogic.mk_eq(r0,w)$C)))]
-                    induct_scheme;
-        in standard (ObjectLogic.rulify (mp OF [ind, refl])) end;
-
-    fun cases_scheme_prf_noopt () =
-        prove_standard [] cases_scheme_prop (fn _ =>
-         EVERY [asm_full_simp_tac (HOL_basic_ss addsimps [atomize_all, atomize_imp]) 1,
-               try_param_tac rN induct_scheme 1,
-               rtac impI 1,
-               REPEAT (etac allE 1),
-               etac mp 1,
-               rtac refl 1])
-    val cases_scheme_prf = quick_and_dirty_prf cases_scheme_prf_noopt cases_scheme_prf_opt;
-    val cases_scheme = timeit_msg "record cases_scheme proof:" cases_scheme_prf;
-
-    fun cases_prf () =
-      prove_standard [] cases_prop  (fn _ =>
-        try_param_tac rN cases_scheme 1
-        THEN simp_all_tac HOL_basic_ss [unit_all_eq1]);
-    val cases = timeit_msg "record cases proof:" cases_prf;
-
-    fun split_meta_prf () =
-        prove false [] split_meta_prop (fn _ =>
-         EVERY [rtac equal_intr_rule 1, Goal.norm_hhf_tac 1,
-                etac meta_allE 1, atac 1,
-                rtac (prop_subst OF [surjective]) 1,
-                REPEAT (etac meta_allE 1), atac 1]);
-    val split_meta = timeit_msg "record split_meta proof:" split_meta_prf;
-    val split_meta_standard = standard split_meta;
-
-    fun split_object_prf_opt () =
-      let
-        val cPI= cterm_of defs_thy (lambda r0 (Trueprop (P$r0)));
-        val (_$Abs(_,_,P$_)) = fst (Logic.dest_equals (concl_of split_meta_standard));
-        val cP = cterm_of defs_thy P;
-        val split_meta' = cterm_instantiate [(cP,cPI)] split_meta_standard;
-        val (l,r) = HOLogic.dest_eq (HOLogic.dest_Trueprop split_object_prop);
-        val cl = cterm_of defs_thy (HOLogic.mk_Trueprop l);
-        val cr = cterm_of defs_thy (HOLogic.mk_Trueprop r);
-        val thl = assume cl                 (*All r. P r*) (* 1 *)
-                |> obj_to_meta_all          (*!!r. P r*)
-                |> equal_elim split_meta'   (*!!n m more. P (ext n m more)*)
-                |> meta_to_obj_all          (*All n m more. P (ext n m more)*) (* 2*)
-                |> implies_intr cl          (* 1 ==> 2 *)
-        val thr = assume cr                           (*All n m more. P (ext n m more)*)
-                |> obj_to_meta_all                    (*!!n m more. P (ext n m more)*)
-                |> equal_elim (symmetric split_meta') (*!!r. P r*)
-                |> meta_to_obj_all                    (*All r. P r*)
-                |> implies_intr cr                    (* 2 ==> 1 *)
-     in standard (thr COMP (thl COMP iffI)) end;
-
-    fun split_object_prf_noopt () =
-        prove_standard [] split_object_prop (fn _ =>
-         EVERY [rtac iffI 1,
-                REPEAT (rtac allI 1), etac allE 1, atac 1,
-                rtac allI 1, rtac induct_scheme 1,REPEAT (etac allE 1),atac 1]);
-
-    val split_object_prf = quick_and_dirty_prf split_object_prf_noopt split_object_prf_opt;
-    val split_object = timeit_msg "record split_object proof:" split_object_prf;
-
-
-    fun split_ex_prf () =
-        prove_standard [] split_ex_prop (fn _ =>
-          EVERY [rtac iffI 1,
-                   etac exE 1,
-                   simp_tac (HOL_basic_ss addsimps [split_meta_standard]) 1,
-                   ex_inst_tac 1,
-                   (*REPEAT (rtac exI 1),*)
-                   atac 1,
-                 REPEAT (etac exE 1),
-                 rtac exI 1,
-                 atac 1]);
-    val split_ex = timeit_msg "record split_ex proof:" split_ex_prf;
-
-    fun equality_tac thms =
-      let val (s'::s::eqs) = rev thms;
-          val ss' = ss addsimps (s'::s::sel_convs_standard);
-          val eqs' = map (simplify ss') eqs;
-      in simp_tac (HOL_basic_ss addsimps (s'::s::eqs')) 1 end;
-
-   fun equality_prf () = prove_standard [] equality_prop (fn {context, ...} =>
-      fn st => let val [s, s'] = map #1 (rev (Tactic.innermost_params 1 st)) in
-        st |> (res_inst_tac context [((rN, 0), s)] cases_scheme 1
-        THEN res_inst_tac context [((rN, 0), s')] cases_scheme 1
-        THEN (METAHYPS equality_tac 1))
-             (* simp_all_tac ss (sel_convs) would also work but is less efficient *)
-      end);
-     val equality = timeit_msg "record equality proof:" equality_prf;
-
-    val ((([sel_convs',upd_convs',sel_defs',upd_defs',[split_meta',split_object',split_ex'],derived_defs'],
-            [surjective',equality']),[induct_scheme',induct',cases_scheme',cases']), thms_thy) =
-      defs_thy
-      |> (PureThy.add_thmss o map (Thm.no_attributes o apfst Binding.name))
-         [("select_convs", sel_convs_standard),
-          ("update_convs", upd_convs),
-          ("select_defs", sel_defs),
-          ("update_defs", upd_defs),
-          ("splits", [split_meta_standard,split_object,split_ex]),
-          ("defs", derived_defs)]
-      ||>> (PureThy.add_thms o map (Thm.no_attributes o apfst Binding.name))
-          [("surjective", surjective),
-           ("equality", equality)]
-      ||>> (PureThy.add_thms o (map o apfst o apfst) Binding.name)
-        [(("induct_scheme", induct_scheme), induct_type_global (suffix schemeN name)),
-         (("induct", induct), induct_type_global name),
-         (("cases_scheme", cases_scheme), cases_type_global (suffix schemeN name)),
-         (("cases", cases), cases_type_global name)];
-
-
-    val sel_upd_simps = sel_convs' @ upd_convs';
-    val iffs = [ext_inject]
-    val final_thy =
-      thms_thy
-      |> (snd oo PureThy.add_thmss)
-          [((Binding.name "simps", sel_upd_simps),
-            [Simplifier.simp_add, Nitpick_Const_Simp_Thms.add]),
-           ((Binding.name "iffs", iffs), [iff_add])]
-      |> put_record name (make_record_info args parent fields extension induct_scheme')
-      |> put_sel_upd (names @ [full_moreN]) sel_upd_simps
-      |> add_record_equalities extension_id equality'
-      |> add_extinjects ext_inject
-      |> add_extsplit extension_name ext_split
-      |> add_record_splits extension_id (split_meta',split_object',split_ex',induct_scheme')
-      |> add_extfields extension_name (fields @ [(full_moreN,moreT)])
-      |> add_fieldext (extension_name,snd extension) (names @ [full_moreN])
-      |> Sign.parent_path;
-
-  in final_thy
-  end;
-
-
-(* add_record *)
-
-(*we do all preparations and error checks here, deferring the real
-  work to record_definition*)
-fun gen_add_record prep_typ prep_raw_parent quiet_mode (params, bname) raw_parent raw_fields thy =
-  let
-    val _ = Theory.requires thy "Record" "record definitions";
-    val _ = if quiet_mode then () else writeln ("Defining record " ^ quote bname ^ " ...");
-
-    val ctxt = ProofContext.init thy;
-
-
-    (* parents *)
-
-    fun prep_inst T = fst (cert_typ ctxt T []);
-
-    val parent = Option.map (apfst (map prep_inst) o prep_raw_parent ctxt) raw_parent
-      handle ERROR msg => cat_error msg ("The error(s) above in parent record specification");
-    val parents = add_parents thy parent [];
-
-    val init_env =
-      (case parent of
-        NONE => []
-      | SOME (types, _) => List.foldr OldTerm.add_typ_tfrees [] types);
-
-
-    (* fields *)
-
-    fun prep_field (c, raw_T, mx) env =
-      let val (T, env') = prep_typ ctxt raw_T env handle ERROR msg =>
-        cat_error msg ("The error(s) above occured in record field " ^ quote c)
-      in ((c, T, mx), env') end;
-
-    val (bfields, envir) = fold_map prep_field raw_fields init_env;
-    val envir_names = map fst envir;
-
-
-    (* args *)
-
-    val defaultS = Sign.defaultS thy;
-    val args = map (fn x => (x, AList.lookup (op =) envir x |> the_default defaultS)) params;
-
-
-    (* errors *)
-
-    val name = Sign.full_bname thy bname;
-    val err_dup_record =
-      if is_none (get_record thy name) then []
-      else ["Duplicate definition of record " ^ quote name];
-
-    val err_dup_parms =
-      (case duplicates (op =) params of
-        [] => []
-      | dups => ["Duplicate parameter(s) " ^ commas dups]);
-
-    val err_extra_frees =
-      (case subtract (op =) params envir_names of
-        [] => []
-      | extras => ["Extra free type variable(s) " ^ commas extras]);
-
-    val err_no_fields = if null bfields then ["No fields present"] else [];
-
-    val err_dup_fields =
-      (case duplicates (op =) (map #1 bfields) of
-        [] => []
-      | dups => ["Duplicate field(s) " ^ commas_quote dups]);
-
-    val err_bad_fields =
-      if forall (not_equal moreN o #1) bfields then []
-      else ["Illegal field name " ^ quote moreN];
-
-    val err_dup_sorts =
-      (case duplicates (op =) envir_names of
-        [] => []
-      | dups => ["Inconsistent sort constraints for " ^ commas dups]);
-
-    val errs =
-      err_dup_record @ err_dup_parms @ err_extra_frees @ err_no_fields @
-      err_dup_fields @ err_bad_fields @ err_dup_sorts;
-  in
-    if null errs then () else error (cat_lines errs)  ;
-    thy |> record_definition (args, bname) parent parents bfields
-  end
-  handle ERROR msg => cat_error msg ("Failed to define record " ^ quote bname);
-
-val add_record = gen_add_record read_typ read_raw_parent;
-val add_record_i = gen_add_record cert_typ (K I);
-
-(* setup theory *)
-
-val setup =
-  Sign.add_trfuns ([], parse_translation, [], []) #>
-  Sign.add_advanced_trfuns ([], adv_parse_translation, [], []) #>
-  Simplifier.map_simpset (fn ss =>
-    ss addsimprocs [record_simproc, record_upd_simproc, record_eq_simproc]);
-
-(* outer syntax *)
-
-local structure P = OuterParse and K = OuterKeyword in
-
-val record_decl =
-  P.type_args -- P.name --
-    (P.$$$ "=" |-- Scan.option (P.typ --| P.$$$ "+") -- Scan.repeat1 P.const);
-
-val _ =
-  OuterSyntax.command "record" "define extensible record" K.thy_decl
-    (record_decl >> (fn (x, (y, z)) => Toplevel.theory (add_record false x y z)));
-
-end;
-
-end;
-
-
-structure BasicRecordPackage: BASIC_RECORD_PACKAGE = RecordPackage;
-open BasicRecordPackage;