src/HOL/Nominal/nominal_package.ML
author berghofe
Fri Sep 26 14:53:10 2008 +0200 (2008-09-26)
changeset 28373 5e2c526cfaf0
parent 28084 a05ca48ef263
child 28641 f6e1b2beb766
permissions -rw-r--r--
Added fresh_star_const.
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(*  Title:      HOL/Nominal/nominal_package.ML
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    ID:         $Id$
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    Author:     Stefan Berghofer and Christian Urban, TU Muenchen
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Nominal datatype package for Isabelle/HOL.
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*)
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signature NOMINAL_PACKAGE =
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sig
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  val add_nominal_datatype : bool -> string list -> (string list * bstring * mixfix *
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    (bstring * string list * mixfix) list) list -> theory -> theory
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  type descr
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  type nominal_datatype_info
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  val get_nominal_datatypes : theory -> nominal_datatype_info Symtab.table
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  val get_nominal_datatype : theory -> string -> nominal_datatype_info option
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  val mk_perm: typ list -> term -> term -> term
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  val perm_of_pair: term * term -> term
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  val mk_not_sym: thm list -> thm list
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  val perm_simproc: simproc
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  val fresh_const: typ -> typ -> term
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  val fresh_star_const: typ -> typ -> term
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end
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structure NominalPackage : NOMINAL_PACKAGE =
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struct
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val finite_emptyI = thm "finite.emptyI";
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val finite_Diff = thm "finite_Diff";
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val finite_Un = thm "finite_Un";
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val Un_iff = thm "Un_iff";
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val In0_eq = thm "In0_eq";
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val In1_eq = thm "In1_eq";
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val In0_not_In1 = thm "In0_not_In1";
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val In1_not_In0 = thm "In1_not_In0";
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val Un_assoc = thm "Un_assoc";
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val Collect_disj_eq = thm "Collect_disj_eq";
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val empty_def = thm "empty_def";
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val empty_iff = thm "empty_iff";
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open DatatypeAux;
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open NominalAtoms;
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(** FIXME: DatatypePackage should export this function **)
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local
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fun dt_recs (DtTFree _) = []
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  | dt_recs (DtType (_, dts)) = List.concat (map dt_recs dts)
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  | dt_recs (DtRec i) = [i];
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fun dt_cases (descr: descr) (_, args, constrs) =
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  let
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    fun the_bname i = Sign.base_name (#1 (valOf (AList.lookup (op =) descr i)));
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    val bnames = map the_bname (distinct op = (List.concat (map dt_recs args)));
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  in map (fn (c, _) => space_implode "_" (Sign.base_name c :: bnames)) constrs end;
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fun induct_cases descr =
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  DatatypeProp.indexify_names (List.concat (map (dt_cases descr) (map #2 descr)));
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fun exhaust_cases descr i = dt_cases descr (valOf (AList.lookup (op =) descr i));
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in
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fun mk_case_names_induct descr = RuleCases.case_names (induct_cases descr);
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fun mk_case_names_exhausts descr new =
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  map (RuleCases.case_names o exhaust_cases descr o #1)
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    (List.filter (fn ((_, (name, _, _))) => name mem_string new) descr);
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end;
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(* theory data *)
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type descr = (int * (string * dtyp list * (string * (dtyp list * dtyp) list) list)) list;
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type nominal_datatype_info =
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  {index : int,
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   descr : descr,
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   sorts : (string * sort) list,
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   rec_names : string list,
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   rec_rewrites : thm list,
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   induction : thm,
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   distinct : thm list,
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   inject : thm list};
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structure NominalDatatypesData = TheoryDataFun
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(
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  type T = nominal_datatype_info Symtab.table;
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  val empty = Symtab.empty;
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  val copy = I;
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  val extend = I;
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  fun merge _ tabs : T = Symtab.merge (K true) tabs;
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);
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val get_nominal_datatypes = NominalDatatypesData.get;
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val put_nominal_datatypes = NominalDatatypesData.put;
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val map_nominal_datatypes = NominalDatatypesData.map;
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val get_nominal_datatype = Symtab.lookup o get_nominal_datatypes;
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(**** make datatype info ****)
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fun make_dt_info descr sorts induct reccomb_names rec_thms
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    (((i, (_, (tname, _, _))), distinct), inject) =
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  (tname,
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   {index = i,
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    descr = descr,
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    sorts = sorts,
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    rec_names = reccomb_names,
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    rec_rewrites = rec_thms,
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    induction = induct,
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    distinct = distinct,
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    inject = inject});
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(*******************************)
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val (_ $ (_ $ (_ $ (distinct_f $ _) $ _))) = hd (prems_of distinct_lemma);
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(** simplification procedure for sorting permutations **)
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val dj_cp = thm "dj_cp";
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fun dest_permT (Type ("fun", [Type ("List.list", [Type ("*", [T, _])]),
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      Type ("fun", [_, U])])) = (T, U);
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fun permTs_of (Const ("Nominal.perm", T) $ t $ u) = fst (dest_permT T) :: permTs_of u
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  | permTs_of _ = [];
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fun perm_simproc' thy ss (Const ("Nominal.perm", T) $ t $ (u as Const ("Nominal.perm", U) $ r $ s)) =
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      let
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        val (aT as Type (a, []), S) = dest_permT T;
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        val (bT as Type (b, []), _) = dest_permT U
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      in if aT mem permTs_of u andalso aT <> bT then
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          let
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            val a' = Sign.base_name a;
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            val b' = Sign.base_name b;
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            val cp = PureThy.get_thm thy ("cp_" ^ a' ^ "_" ^ b' ^ "_inst");
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            val dj = PureThy.get_thm thy ("dj_" ^ b' ^ "_" ^ a');
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            val dj_cp' = [cp, dj] MRS dj_cp;
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            val cert = SOME o cterm_of thy
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          in
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            SOME (mk_meta_eq (Drule.instantiate' [SOME (ctyp_of thy S)]
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              [cert t, cert r, cert s] dj_cp'))
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          end
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        else NONE
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      end
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  | perm_simproc' thy ss _ = NONE;
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val perm_simproc =
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  Simplifier.simproc (the_context ()) "perm_simp" ["pi1 \<bullet> (pi2 \<bullet> x)"] perm_simproc';
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val meta_spec = thm "meta_spec";
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fun projections rule =
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  ProjectRule.projections (ProofContext.init (Thm.theory_of_thm rule)) rule
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  |> map (standard #> RuleCases.save rule);
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val supp_prod = thm "supp_prod";
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val fresh_prod = thm "fresh_prod";
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val supports_fresh = thm "supports_fresh";
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val supports_def = thm "Nominal.supports_def";
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val fresh_def = thm "fresh_def";
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val supp_def = thm "supp_def";
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val rev_simps = thms "rev.simps";
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val app_simps = thms "append.simps";
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val at_fin_set_supp = thm "at_fin_set_supp";
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val at_fin_set_fresh = thm "at_fin_set_fresh";
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val abs_fun_eq1 = thm "abs_fun_eq1";
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val collect_simp = rewrite_rule [mk_meta_eq mem_Collect_eq];
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fun mk_perm Ts t u =
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  let
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    val T = fastype_of1 (Ts, t);
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    val U = fastype_of1 (Ts, u)
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  in Const ("Nominal.perm", T --> U --> U) $ t $ u end;
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fun perm_of_pair (x, y) =
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  let
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    val T = fastype_of x;
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    val pT = mk_permT T
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  in Const ("List.list.Cons", HOLogic.mk_prodT (T, T) --> pT --> pT) $
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    HOLogic.mk_prod (x, y) $ Const ("List.list.Nil", pT)
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  end;
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fun mk_not_sym ths = maps (fn th => case prop_of th of
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    _ $ (Const ("Not", _) $ (Const ("op =", _) $ _ $ _)) => [th, th RS not_sym]
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  | _ => [th]) ths;
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fun fresh_const T U = Const ("Nominal.fresh", T --> U --> HOLogic.boolT);
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fun fresh_star_const T U =
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  Const ("Nominal.fresh_star", HOLogic.mk_setT T --> U --> HOLogic.boolT);
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fun gen_add_nominal_datatype prep_typ err flat_names new_type_names dts thy =
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  let
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    (* this theory is used just for parsing *)
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    val tmp_thy = thy |>
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      Theory.copy |>
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      Sign.add_types (map (fn (tvs, tname, mx, _) =>
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        (tname, length tvs, mx)) dts);
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    val atoms = atoms_of thy;
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    val classes = map (NameSpace.map_base (fn s => "pt_" ^ s)) atoms;
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    val cp_classes = List.concat (map (fn atom1 => map (fn atom2 =>
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      Sign.intern_class thy ("cp_" ^ Sign.base_name atom1 ^ "_" ^
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        Sign.base_name atom2)) atoms) atoms);
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    fun augment_sort S = S union classes;
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    val augment_sort_typ = map_type_tfree (fn (s, S) => TFree (s, augment_sort S));
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    fun prep_constr ((constrs, sorts), (cname, cargs, mx)) =
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      let val (cargs', sorts') = Library.foldl (prep_typ tmp_thy) (([], sorts), cargs)
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      in (constrs @ [(cname, cargs', mx)], sorts') end
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    fun prep_dt_spec ((dts, sorts), (tvs, tname, mx, constrs)) =
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      let val (constrs', sorts') = Library.foldl prep_constr (([], sorts), constrs)
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      in (dts @ [(tvs, tname, mx, constrs')], sorts') end
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    val (dts', sorts) = Library.foldl prep_dt_spec (([], []), dts);
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    val sorts' = map (apsnd augment_sort) sorts;
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    val tyvars = map #1 dts';
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    val types_syntax = map (fn (tvs, tname, mx, constrs) => (tname, mx)) dts';
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    val constr_syntax = map (fn (tvs, tname, mx, constrs) =>
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      map (fn (cname, cargs, mx) => (cname, mx)) constrs) dts';
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    val ps = map (fn (_, n, _, _) =>
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      (Sign.full_name tmp_thy n, Sign.full_name tmp_thy (n ^ "_Rep"))) dts;
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    val rps = map Library.swap ps;
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    fun replace_types (Type ("Nominal.ABS", [T, U])) =
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          Type ("fun", [T, Type ("Nominal.noption", [replace_types U])])
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      | replace_types (Type (s, Ts)) =
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          Type (getOpt (AList.lookup op = ps s, s), map replace_types Ts)
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      | replace_types T = T;
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    val dts'' = map (fn (tvs, tname, mx, constrs) => (tvs, tname ^ "_Rep", NoSyn,
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      map (fn (cname, cargs, mx) => (cname ^ "_Rep",
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        map (augment_sort_typ o replace_types) cargs, NoSyn)) constrs)) dts';
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    val new_type_names' = map (fn n => n ^ "_Rep") new_type_names;
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    val full_new_type_names' = map (Sign.full_name thy) new_type_names';
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    val ({induction, ...},thy1) =
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      DatatypePackage.add_datatype err flat_names new_type_names' dts'' thy;
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    val SOME {descr, ...} = Symtab.lookup
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      (DatatypePackage.get_datatypes thy1) (hd full_new_type_names');
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    fun nth_dtyp i = typ_of_dtyp descr sorts' (DtRec i);
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    val big_name = space_implode "_" new_type_names;
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    (**** define permutation functions ****)
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    val permT = mk_permT (TFree ("'x", HOLogic.typeS));
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    val pi = Free ("pi", permT);
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    val perm_types = map (fn (i, _) =>
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      let val T = nth_dtyp i
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      in permT --> T --> T end) descr;
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    val perm_names' = DatatypeProp.indexify_names (map (fn (i, _) =>
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      "perm_" ^ name_of_typ (nth_dtyp i)) descr);
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    val perm_names = replicate (length new_type_names) "Nominal.perm" @
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      map (Sign.full_name thy1) (List.drop (perm_names', length new_type_names));
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    val perm_names_types = perm_names ~~ perm_types;
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    val perm_names_types' = perm_names' ~~ perm_types;
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    val perm_eqs = maps (fn (i, (_, _, constrs)) =>
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      let val T = nth_dtyp i
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      in map (fn (cname, dts) =>
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        let
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          val Ts = map (typ_of_dtyp descr sorts') dts;
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          val names = DatatypeProp.make_tnames Ts;
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          val args = map Free (names ~~ Ts);
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          val c = Const (cname, Ts ---> T);
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          fun perm_arg (dt, x) =
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            let val T = type_of x
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            in if is_rec_type dt then
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                let val (Us, _) = strip_type T
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                in list_abs (map (pair "x") Us,
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                  Free (nth perm_names_types' (body_index dt)) $ pi $
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                    list_comb (x, map (fn (i, U) =>
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                      Const ("Nominal.perm", permT --> U --> U) $
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                        (Const ("List.rev", permT --> permT) $ pi) $
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                        Bound i) ((length Us - 1 downto 0) ~~ Us)))
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                end
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              else Const ("Nominal.perm", permT --> T --> T) $ pi $ x
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            end;
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        in
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          (Attrib.no_binding, HOLogic.mk_Trueprop (HOLogic.mk_eq
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            (Free (nth perm_names_types' i) $
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               Free ("pi", mk_permT (TFree ("'x", HOLogic.typeS))) $
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               list_comb (c, args),
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             list_comb (c, map perm_arg (dts ~~ args)))))
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        end) constrs
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      end) descr;
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    val (perm_simps, thy2) =
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      PrimrecPackage.add_primrec_overloaded
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        (map (fn (s, sT) => (s, sT, false))
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           (List.take (perm_names' ~~ perm_names_types, length new_type_names)))
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        (map (fn s => (Name.binding s, NONE, NoSyn)) perm_names') perm_eqs thy1;
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    (**** prove that permutation functions introduced by unfolding are ****)
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    (**** equivalent to already existing permutation functions         ****)
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    val _ = warning ("length descr: " ^ string_of_int (length descr));
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    val _ = warning ("length new_type_names: " ^ string_of_int (length new_type_names));
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    val perm_indnames = DatatypeProp.make_tnames (map body_type perm_types);
wenzelm@26343
   313
    val perm_fun_def = PureThy.get_thm thy2 "perm_fun_def";
berghofe@17870
   314
berghofe@17870
   315
    val unfolded_perm_eq_thms =
berghofe@17870
   316
      if length descr = length new_type_names then []
berghofe@17870
   317
      else map standard (List.drop (split_conj_thm
wenzelm@20046
   318
        (Goal.prove_global thy2 [] []
berghofe@17870
   319
          (HOLogic.mk_Trueprop (foldr1 HOLogic.mk_conj
berghofe@17870
   320
            (map (fn (c as (s, T), x) =>
berghofe@17870
   321
               let val [T1, T2] = binder_types T
berghofe@17870
   322
               in HOLogic.mk_eq (Const c $ pi $ Free (x, T2),
berghofe@19494
   323
                 Const ("Nominal.perm", T) $ pi $ Free (x, T2))
berghofe@17870
   324
               end)
berghofe@18010
   325
             (perm_names_types ~~ perm_indnames))))
berghofe@18010
   326
          (fn _ => EVERY [indtac induction perm_indnames 1,
berghofe@17870
   327
            ALLGOALS (asm_full_simp_tac
berghofe@17870
   328
              (simpset_of thy2 addsimps [perm_fun_def]))])),
berghofe@17870
   329
        length new_type_names));
berghofe@17870
   330
berghofe@17870
   331
    (**** prove [] \<bullet> t = t ****)
berghofe@17870
   332
berghofe@17870
   333
    val _ = warning "perm_empty_thms";
berghofe@17870
   334
berghofe@17870
   335
    val perm_empty_thms = List.concat (map (fn a =>
berghofe@17870
   336
      let val permT = mk_permT (Type (a, []))
berghofe@17870
   337
      in map standard (List.take (split_conj_thm
wenzelm@20046
   338
        (Goal.prove_global thy2 [] []
berghofe@17870
   339
          (HOLogic.mk_Trueprop (foldr1 HOLogic.mk_conj
berghofe@17870
   340
            (map (fn ((s, T), x) => HOLogic.mk_eq
berghofe@17870
   341
                (Const (s, permT --> T --> T) $
berghofe@17870
   342
                   Const ("List.list.Nil", permT) $ Free (x, T),
berghofe@17870
   343
                 Free (x, T)))
berghofe@17870
   344
             (perm_names ~~
berghofe@18010
   345
              map body_type perm_types ~~ perm_indnames))))
berghofe@18010
   346
          (fn _ => EVERY [indtac induction perm_indnames 1,
berghofe@17870
   347
            ALLGOALS (asm_full_simp_tac (simpset_of thy2))])),
berghofe@17870
   348
        length new_type_names))
berghofe@17870
   349
      end)
berghofe@17870
   350
      atoms);
berghofe@17870
   351
berghofe@17870
   352
    (**** prove (pi1 @ pi2) \<bullet> t = pi1 \<bullet> (pi2 \<bullet> t) ****)
berghofe@17870
   353
berghofe@17870
   354
    val _ = warning "perm_append_thms";
berghofe@17870
   355
berghofe@17870
   356
    (*FIXME: these should be looked up statically*)
wenzelm@26343
   357
    val at_pt_inst = PureThy.get_thm thy2 "at_pt_inst";
wenzelm@26343
   358
    val pt2 = PureThy.get_thm thy2 "pt2";
berghofe@17870
   359
berghofe@17870
   360
    val perm_append_thms = List.concat (map (fn a =>
berghofe@17870
   361
      let
berghofe@17870
   362
        val permT = mk_permT (Type (a, []));
berghofe@17870
   363
        val pi1 = Free ("pi1", permT);
berghofe@17870
   364
        val pi2 = Free ("pi2", permT);
wenzelm@26343
   365
        val pt_inst = PureThy.get_thm thy2 ("pt_" ^ Sign.base_name a ^ "_inst");
berghofe@17870
   366
        val pt2' = pt_inst RS pt2;
wenzelm@26343
   367
        val pt2_ax = PureThy.get_thm thy2 (NameSpace.map_base (fn s => "pt_" ^ s ^ "2") a);
berghofe@17870
   368
      in List.take (map standard (split_conj_thm
wenzelm@20046
   369
        (Goal.prove_global thy2 [] []
berghofe@17870
   370
             (HOLogic.mk_Trueprop (foldr1 HOLogic.mk_conj
berghofe@17870
   371
                (map (fn ((s, T), x) =>
berghofe@17870
   372
                    let val perm = Const (s, permT --> T --> T)
berghofe@17870
   373
                    in HOLogic.mk_eq
haftmann@23029
   374
                      (perm $ (Const ("List.append", permT --> permT --> permT) $
berghofe@17870
   375
                         pi1 $ pi2) $ Free (x, T),
berghofe@17870
   376
                       perm $ pi1 $ (perm $ pi2 $ Free (x, T)))
berghofe@17870
   377
                    end)
berghofe@17870
   378
                  (perm_names ~~
berghofe@18010
   379
                   map body_type perm_types ~~ perm_indnames))))
berghofe@18010
   380
           (fn _ => EVERY [indtac induction perm_indnames 1,
berghofe@17870
   381
              ALLGOALS (asm_full_simp_tac (simpset_of thy2 addsimps [pt2', pt2_ax]))]))),
berghofe@17870
   382
         length new_type_names)
berghofe@17870
   383
      end) atoms);
berghofe@17870
   384
berghofe@17870
   385
    (**** prove pi1 ~ pi2 ==> pi1 \<bullet> t = pi2 \<bullet> t ****)
berghofe@17870
   386
berghofe@17870
   387
    val _ = warning "perm_eq_thms";
berghofe@17870
   388
wenzelm@26343
   389
    val pt3 = PureThy.get_thm thy2 "pt3";
wenzelm@26343
   390
    val pt3_rev = PureThy.get_thm thy2 "pt3_rev";
berghofe@17870
   391
berghofe@17870
   392
    val perm_eq_thms = List.concat (map (fn a =>
berghofe@17870
   393
      let
berghofe@17870
   394
        val permT = mk_permT (Type (a, []));
berghofe@17870
   395
        val pi1 = Free ("pi1", permT);
berghofe@17870
   396
        val pi2 = Free ("pi2", permT);
berghofe@17870
   397
        (*FIXME: not robust - better access these theorems using NominalData?*)
wenzelm@26343
   398
        val at_inst = PureThy.get_thm thy2 ("at_" ^ Sign.base_name a ^ "_inst");
wenzelm@26343
   399
        val pt_inst = PureThy.get_thm thy2 ("pt_" ^ Sign.base_name a ^ "_inst");
berghofe@17870
   400
        val pt3' = pt_inst RS pt3;
berghofe@17870
   401
        val pt3_rev' = at_inst RS (pt_inst RS pt3_rev);
wenzelm@26343
   402
        val pt3_ax = PureThy.get_thm thy2 (NameSpace.map_base (fn s => "pt_" ^ s ^ "3") a);
berghofe@17870
   403
      in List.take (map standard (split_conj_thm
wenzelm@20046
   404
        (Goal.prove_global thy2 [] [] (Logic.mk_implies
berghofe@19494
   405
             (HOLogic.mk_Trueprop (Const ("Nominal.prm_eq",
berghofe@17870
   406
                permT --> permT --> HOLogic.boolT) $ pi1 $ pi2),
berghofe@17870
   407
              HOLogic.mk_Trueprop (foldr1 HOLogic.mk_conj
berghofe@17870
   408
                (map (fn ((s, T), x) =>
berghofe@17870
   409
                    let val perm = Const (s, permT --> T --> T)
berghofe@17870
   410
                    in HOLogic.mk_eq
berghofe@17870
   411
                      (perm $ pi1 $ Free (x, T),
berghofe@17870
   412
                       perm $ pi2 $ Free (x, T))
berghofe@17870
   413
                    end)
berghofe@17870
   414
                  (perm_names ~~
berghofe@18010
   415
                   map body_type perm_types ~~ perm_indnames)))))
berghofe@18010
   416
           (fn _ => EVERY [indtac induction perm_indnames 1,
berghofe@17870
   417
              ALLGOALS (asm_full_simp_tac (simpset_of thy2 addsimps [pt3', pt3_rev', pt3_ax]))]))),
berghofe@17870
   418
         length new_type_names)
berghofe@17870
   419
      end) atoms);
berghofe@17870
   420
berghofe@17870
   421
    (**** prove pi1 \<bullet> (pi2 \<bullet> t) = (pi1 \<bullet> pi2) \<bullet> (pi1 \<bullet> t) ****)
berghofe@17870
   422
wenzelm@26343
   423
    val cp1 = PureThy.get_thm thy2 "cp1";
wenzelm@26343
   424
    val dj_cp = PureThy.get_thm thy2 "dj_cp";
wenzelm@26343
   425
    val pt_perm_compose = PureThy.get_thm thy2 "pt_perm_compose";
wenzelm@26343
   426
    val pt_perm_compose_rev = PureThy.get_thm thy2 "pt_perm_compose_rev";
wenzelm@26343
   427
    val dj_perm_perm_forget = PureThy.get_thm thy2 "dj_perm_perm_forget";
berghofe@17870
   428
berghofe@17870
   429
    fun composition_instance name1 name2 thy =
berghofe@17870
   430
      let
berghofe@17870
   431
        val name1' = Sign.base_name name1;
berghofe@17870
   432
        val name2' = Sign.base_name name2;
berghofe@17870
   433
        val cp_class = Sign.intern_class thy ("cp_" ^ name1' ^ "_" ^ name2');
berghofe@17870
   434
        val permT1 = mk_permT (Type (name1, []));
berghofe@17870
   435
        val permT2 = mk_permT (Type (name2, []));
berghofe@17870
   436
        val augment = map_type_tfree
berghofe@17870
   437
          (fn (x, S) => TFree (x, cp_class :: S));
berghofe@17870
   438
        val Ts = map (augment o body_type) perm_types;
wenzelm@26343
   439
        val cp_inst = PureThy.get_thm thy ("cp_" ^ name1' ^ "_" ^ name2' ^ "_inst");
berghofe@17870
   440
        val simps = simpset_of thy addsimps (perm_fun_def ::
berghofe@17870
   441
          (if name1 <> name2 then
wenzelm@26343
   442
             let val dj = PureThy.get_thm thy ("dj_" ^ name2' ^ "_" ^ name1')
berghofe@17870
   443
             in [dj RS (cp_inst RS dj_cp), dj RS dj_perm_perm_forget] end
berghofe@17870
   444
           else
berghofe@17870
   445
             let
wenzelm@26343
   446
               val at_inst = PureThy.get_thm thy ("at_" ^ name1' ^ "_inst");
wenzelm@26343
   447
               val pt_inst = PureThy.get_thm thy ("pt_" ^ name1' ^ "_inst");
berghofe@17870
   448
             in
berghofe@17870
   449
               [cp_inst RS cp1 RS sym,
berghofe@17870
   450
                at_inst RS (pt_inst RS pt_perm_compose) RS sym,
berghofe@17870
   451
                at_inst RS (pt_inst RS pt_perm_compose_rev) RS sym]
berghofe@17870
   452
            end))
wenzelm@20046
   453
        val thms = split_conj_thm (Goal.prove_global thy [] []
berghofe@17870
   454
            (HOLogic.mk_Trueprop (foldr1 HOLogic.mk_conj
berghofe@17870
   455
              (map (fn ((s, T), x) =>
berghofe@17870
   456
                  let
berghofe@17870
   457
                    val pi1 = Free ("pi1", permT1);
berghofe@17870
   458
                    val pi2 = Free ("pi2", permT2);
berghofe@17870
   459
                    val perm1 = Const (s, permT1 --> T --> T);
berghofe@17870
   460
                    val perm2 = Const (s, permT2 --> T --> T);
berghofe@19494
   461
                    val perm3 = Const ("Nominal.perm", permT1 --> permT2 --> permT2)
berghofe@17870
   462
                  in HOLogic.mk_eq
berghofe@17870
   463
                    (perm1 $ pi1 $ (perm2 $ pi2 $ Free (x, T)),
berghofe@17870
   464
                     perm2 $ (perm3 $ pi1 $ pi2) $ (perm1 $ pi1 $ Free (x, T)))
berghofe@17870
   465
                  end)
berghofe@18010
   466
                (perm_names ~~ Ts ~~ perm_indnames))))
berghofe@18010
   467
          (fn _ => EVERY [indtac induction perm_indnames 1,
wenzelm@20046
   468
             ALLGOALS (asm_full_simp_tac simps)]))
berghofe@17870
   469
      in
berghofe@19275
   470
        foldl (fn ((s, tvs), thy) => AxClass.prove_arity
berghofe@17870
   471
            (s, replicate (length tvs) (cp_class :: classes), [cp_class])
haftmann@24218
   472
            (Class.intro_classes_tac [] THEN ALLGOALS (resolve_tac thms)) thy)
berghofe@17870
   473
          thy (full_new_type_names' ~~ tyvars)
berghofe@17870
   474
      end;
berghofe@17870
   475
urbanc@18381
   476
    val (perm_thmss,thy3) = thy2 |>
berghofe@17870
   477
      fold (fn name1 => fold (composition_instance name1) atoms) atoms |>
berghofe@17870
   478
      curry (Library.foldr (fn ((i, (tyname, args, _)), thy) =>
berghofe@19275
   479
        AxClass.prove_arity (tyname, replicate (length args) classes, classes)
haftmann@24218
   480
        (Class.intro_classes_tac [] THEN REPEAT (EVERY
berghofe@17870
   481
           [resolve_tac perm_empty_thms 1,
berghofe@17870
   482
            resolve_tac perm_append_thms 1,
berghofe@17870
   483
            resolve_tac perm_eq_thms 1, assume_tac 1])) thy))
berghofe@17870
   484
        (List.take (descr, length new_type_names)) |>
berghofe@17870
   485
      PureThy.add_thmss
berghofe@17870
   486
        [((space_implode "_" new_type_names ^ "_unfolded_perm_eq",
krauss@18759
   487
          unfolded_perm_eq_thms), [Simplifier.simp_add]),
berghofe@17870
   488
         ((space_implode "_" new_type_names ^ "_perm_empty",
krauss@18759
   489
          perm_empty_thms), [Simplifier.simp_add]),
berghofe@17870
   490
         ((space_implode "_" new_type_names ^ "_perm_append",
krauss@18759
   491
          perm_append_thms), [Simplifier.simp_add]),
berghofe@17870
   492
         ((space_implode "_" new_type_names ^ "_perm_eq",
krauss@18759
   493
          perm_eq_thms), [Simplifier.simp_add])];
wenzelm@21365
   494
berghofe@17870
   495
    (**** Define representing sets ****)
berghofe@17870
   496
berghofe@17870
   497
    val _ = warning "representing sets";
berghofe@17870
   498
berghofe@21021
   499
    val rep_set_names = DatatypeProp.indexify_names
berghofe@21021
   500
      (map (fn (i, _) => name_of_typ (nth_dtyp i) ^ "_set") descr);
berghofe@17870
   501
    val big_rep_name =
berghofe@17870
   502
      space_implode "_" (DatatypeProp.indexify_names (List.mapPartial
berghofe@19494
   503
        (fn (i, ("Nominal.noption", _, _)) => NONE
berghofe@17870
   504
          | (i, _) => SOME (name_of_typ (nth_dtyp i))) descr)) ^ "_set";
berghofe@17870
   505
    val _ = warning ("big_rep_name: " ^ big_rep_name);
berghofe@17870
   506
berghofe@17870
   507
    fun strip_option (dtf as DtType ("fun", [dt, DtRec i])) =
berghofe@17870
   508
          (case AList.lookup op = descr i of
berghofe@19494
   509
             SOME ("Nominal.noption", _, [(_, [dt']), _]) =>
berghofe@17870
   510
               apfst (cons dt) (strip_option dt')
berghofe@17870
   511
           | _ => ([], dtf))
berghofe@19494
   512
      | strip_option (DtType ("fun", [dt, DtType ("Nominal.noption", [dt'])])) =
berghofe@18261
   513
          apfst (cons dt) (strip_option dt')
berghofe@17870
   514
      | strip_option dt = ([], dt);
berghofe@17870
   515
berghofe@19133
   516
    val dt_atomTs = distinct op = (map (typ_of_dtyp descr sorts')
berghofe@18280
   517
      (List.concat (map (fn (_, (_, _, cs)) => List.concat
berghofe@18280
   518
        (map (List.concat o map (fst o strip_option) o snd) cs)) descr)));
berghofe@18280
   519
berghofe@17870
   520
    fun make_intr s T (cname, cargs) =
berghofe@17870
   521
      let
wenzelm@21365
   522
        fun mk_prem (dt, (j, j', prems, ts)) =
berghofe@17870
   523
          let
berghofe@17870
   524
            val (dts, dt') = strip_option dt;
berghofe@17870
   525
            val (dts', dt'') = strip_dtyp dt';
berghofe@18107
   526
            val Ts = map (typ_of_dtyp descr sorts') dts;
berghofe@18107
   527
            val Us = map (typ_of_dtyp descr sorts') dts';
berghofe@18107
   528
            val T = typ_of_dtyp descr sorts' dt'';
berghofe@17870
   529
            val free = mk_Free "x" (Us ---> T) j;
berghofe@17870
   530
            val free' = app_bnds free (length Us);
berghofe@17870
   531
            fun mk_abs_fun (T, (i, t)) =
berghofe@17870
   532
              let val U = fastype_of t
berghofe@19494
   533
              in (i + 1, Const ("Nominal.abs_fun", [T, U, T] --->
berghofe@19494
   534
                Type ("Nominal.noption", [U])) $ mk_Free "y" T i $ t)
berghofe@17870
   535
              end
berghofe@17870
   536
          in (j + 1, j' + length Ts,
berghofe@17870
   537
            case dt'' of
berghofe@17870
   538
                DtRec k => list_all (map (pair "x") Us,
berghofe@21021
   539
                  HOLogic.mk_Trueprop (Free (List.nth (rep_set_names, k),
berghofe@21021
   540
                    T --> HOLogic.boolT) $ free')) :: prems
berghofe@17870
   541
              | _ => prems,
berghofe@17870
   542
            snd (foldr mk_abs_fun (j', free) Ts) :: ts)
berghofe@17870
   543
          end;
berghofe@17870
   544
berghofe@17870
   545
        val (_, _, prems, ts) = foldr mk_prem (1, 1, [], []) cargs;
berghofe@21021
   546
        val concl = HOLogic.mk_Trueprop (Free (s, T --> HOLogic.boolT) $
berghofe@21021
   547
          list_comb (Const (cname, map fastype_of ts ---> T), ts))
berghofe@17870
   548
      in Logic.list_implies (prems, concl)
berghofe@17870
   549
      end;
berghofe@17870
   550
berghofe@21021
   551
    val (intr_ts, (rep_set_names', recTs')) =
berghofe@21021
   552
      apfst List.concat (apsnd ListPair.unzip (ListPair.unzip (List.mapPartial
berghofe@19494
   553
        (fn ((_, ("Nominal.noption", _, _)), _) => NONE
berghofe@17870
   554
          | ((i, (_, _, constrs)), rep_set_name) =>
berghofe@17870
   555
              let val T = nth_dtyp i
berghofe@17870
   556
              in SOME (map (make_intr rep_set_name T) constrs,
berghofe@21021
   557
                (rep_set_name, T))
berghofe@17870
   558
              end)
berghofe@21021
   559
                (descr ~~ rep_set_names))));
berghofe@21021
   560
    val rep_set_names'' = map (Sign.full_name thy3) rep_set_names';
berghofe@17870
   561
wenzelm@21365
   562
    val ({raw_induct = rep_induct, intrs = rep_intrs, ...}, thy4) =
wenzelm@26475
   563
        InductivePackage.add_inductive_global (serial_string ())
wenzelm@26475
   564
          {quiet_mode = false, verbose = false, kind = Thm.internalK,
wenzelm@28083
   565
           alt_name = Name.binding big_rep_name, coind = false, no_elim = true, no_ind = false,
berghofe@26536
   566
           skip_mono = true}
wenzelm@28083
   567
          (map (fn (s, T) => ((Name.binding s, T --> HOLogic.boolT), NoSyn))
wenzelm@26128
   568
             (rep_set_names' ~~ recTs'))
wenzelm@28084
   569
          [] (map (fn x => (Attrib.no_binding, x)) intr_ts) [] thy3;
berghofe@17870
   570
berghofe@17870
   571
    (**** Prove that representing set is closed under permutation ****)
berghofe@17870
   572
berghofe@17870
   573
    val _ = warning "proving closure under permutation...";
berghofe@17870
   574
wenzelm@26343
   575
    val abs_perm = PureThy.get_thms thy4 "abs_perm";
berghofe@25951
   576
berghofe@17870
   577
    val perm_indnames' = List.mapPartial
berghofe@19494
   578
      (fn (x, (_, ("Nominal.noption", _, _))) => NONE | (x, _) => SOME x)
berghofe@17870
   579
      (perm_indnames ~~ descr);
berghofe@17870
   580
berghofe@17870
   581
    fun mk_perm_closed name = map (fn th => standard (th RS mp))
wenzelm@20046
   582
      (List.take (split_conj_thm (Goal.prove_global thy4 [] []
berghofe@17870
   583
        (HOLogic.mk_Trueprop (foldr1 HOLogic.mk_conj (map
berghofe@21021
   584
           (fn ((s, T), x) =>
berghofe@17870
   585
              let
berghofe@21021
   586
                val T = map_type_tfree
berghofe@21021
   587
                  (fn (s, cs) => TFree (s, cs union cp_classes)) T;
berghofe@21021
   588
                val S = Const (s, T --> HOLogic.boolT);
berghofe@17870
   589
                val permT = mk_permT (Type (name, []))
berghofe@21021
   590
              in HOLogic.mk_imp (S $ Free (x, T),
berghofe@21021
   591
                S $ (Const ("Nominal.perm", permT --> T --> T) $
berghofe@21021
   592
                  Free ("pi", permT) $ Free (x, T)))
berghofe@21021
   593
              end) (rep_set_names'' ~~ recTs' ~~ perm_indnames'))))
berghofe@18010
   594
        (fn _ => EVERY (* CU: added perm_fun_def in the final tactic in order to deal with funs *)
berghofe@17870
   595
           [indtac rep_induct [] 1,
berghofe@17870
   596
            ALLGOALS (simp_tac (simpset_of thy4 addsimps
berghofe@25951
   597
              (symmetric perm_fun_def :: abs_perm))),
wenzelm@21365
   598
            ALLGOALS (resolve_tac rep_intrs
berghofe@17870
   599
               THEN_ALL_NEW (asm_full_simp_tac (simpset_of thy4 addsimps [perm_fun_def])))])),
berghofe@17870
   600
        length new_type_names));
berghofe@17870
   601
berghofe@17870
   602
    val perm_closed_thmss = map mk_perm_closed atoms;
berghofe@17870
   603
berghofe@17870
   604
    (**** typedef ****)
berghofe@17870
   605
berghofe@17870
   606
    val _ = warning "defining type...";
berghofe@17870
   607
berghofe@18366
   608
    val (typedefs, thy6) =
wenzelm@26651
   609
      thy4
berghofe@21021
   610
      |> fold_map (fn ((((name, mx), tvs), (cname, U)), name') => fn thy =>
wenzelm@26475
   611
          TypedefPackage.add_typedef_i false (SOME name') (name, tvs, mx)
berghofe@21021
   612
            (Const ("Collect", (U --> HOLogic.boolT) --> HOLogic.mk_setT U) $
berghofe@21021
   613
               Const (cname, U --> HOLogic.boolT)) NONE
berghofe@21021
   614
            (rtac exI 1 THEN rtac CollectI 1 THEN
berghofe@17870
   615
              QUIET_BREADTH_FIRST (has_fewer_prems 1)
wenzelm@26475
   616
              (resolve_tac rep_intrs 1)) thy |> (fn ((_, r), thy) =>
berghofe@17870
   617
        let
wenzelm@20071
   618
          val permT = mk_permT (TFree (Name.variant tvs "'a", HOLogic.typeS));
berghofe@17870
   619
          val pi = Free ("pi", permT);
berghofe@17870
   620
          val tvs' = map (fn s => TFree (s, the (AList.lookup op = sorts' s))) tvs;
berghofe@17870
   621
          val T = Type (Sign.intern_type thy name, tvs');
berghofe@18366
   622
        in apfst (pair r o hd)
haftmann@27691
   623
          (PureThy.add_defs_unchecked true [(("prm_" ^ name ^ "_def", Logic.mk_equals
berghofe@19494
   624
            (Const ("Nominal.perm", permT --> T --> T) $ pi $ Free ("x", T),
berghofe@17870
   625
             Const (Sign.intern_const thy ("Abs_" ^ name), U --> T) $
berghofe@19494
   626
               (Const ("Nominal.perm", permT --> U --> U) $ pi $
berghofe@17870
   627
                 (Const (Sign.intern_const thy ("Rep_" ^ name), T --> U) $
berghofe@17870
   628
                   Free ("x", T))))), [])] thy)
berghofe@17870
   629
        end))
berghofe@18366
   630
          (types_syntax ~~ tyvars ~~
berghofe@21021
   631
            List.take (rep_set_names'' ~~ recTs', length new_type_names) ~~
berghofe@21021
   632
            new_type_names);
berghofe@17870
   633
berghofe@17870
   634
    val perm_defs = map snd typedefs;
berghofe@21021
   635
    val Abs_inverse_thms = map (collect_simp o #Abs_inverse o fst) typedefs;
berghofe@18016
   636
    val Rep_inverse_thms = map (#Rep_inverse o fst) typedefs;
berghofe@21021
   637
    val Rep_thms = map (collect_simp o #Rep o fst) typedefs;
berghofe@17870
   638
berghofe@18016
   639
berghofe@17870
   640
    (** prove that new types are in class pt_<name> **)
berghofe@17870
   641
berghofe@17870
   642
    val _ = warning "prove that new types are in class pt_<name> ...";
berghofe@17870
   643
berghofe@17870
   644
    fun pt_instance ((class, atom), perm_closed_thms) =
berghofe@21021
   645
      fold (fn ((((((Abs_inverse, Rep_inverse), Rep),
berghofe@17870
   646
        perm_def), name), tvs), perm_closed) => fn thy =>
berghofe@19275
   647
          AxClass.prove_arity
berghofe@17870
   648
            (Sign.intern_type thy name,
berghofe@17870
   649
              replicate (length tvs) (classes @ cp_classes), [class])
haftmann@24218
   650
            (EVERY [Class.intro_classes_tac [],
berghofe@17870
   651
              rewrite_goals_tac [perm_def],
berghofe@17870
   652
              asm_full_simp_tac (simpset_of thy addsimps [Rep_inverse]) 1,
berghofe@17870
   653
              asm_full_simp_tac (simpset_of thy addsimps
berghofe@17870
   654
                [Rep RS perm_closed RS Abs_inverse]) 1,
wenzelm@26343
   655
              asm_full_simp_tac (HOL_basic_ss addsimps [PureThy.get_thm thy
wenzelm@26337
   656
                ("pt_" ^ Sign.base_name atom ^ "3")]) 1]) thy)
berghofe@21021
   657
        (Abs_inverse_thms ~~ Rep_inverse_thms ~~ Rep_thms ~~ perm_defs ~~
berghofe@21021
   658
           new_type_names ~~ tyvars ~~ perm_closed_thms);
berghofe@17870
   659
berghofe@17870
   660
berghofe@17870
   661
    (** prove that new types are in class cp_<name1>_<name2> **)
berghofe@17870
   662
berghofe@17870
   663
    val _ = warning "prove that new types are in class cp_<name1>_<name2> ...";
berghofe@17870
   664
berghofe@17870
   665
    fun cp_instance (atom1, perm_closed_thms1) (atom2, perm_closed_thms2) thy =
berghofe@17870
   666
      let
berghofe@17870
   667
        val name = "cp_" ^ Sign.base_name atom1 ^ "_" ^ Sign.base_name atom2;
berghofe@17870
   668
        val class = Sign.intern_class thy name;
wenzelm@26343
   669
        val cp1' = PureThy.get_thm thy (name ^ "_inst") RS cp1
berghofe@21021
   670
      in fold (fn ((((((Abs_inverse, Rep),
berghofe@17870
   671
        perm_def), name), tvs), perm_closed1), perm_closed2) => fn thy =>
berghofe@19275
   672
          AxClass.prove_arity
berghofe@17870
   673
            (Sign.intern_type thy name,
berghofe@17870
   674
              replicate (length tvs) (classes @ cp_classes), [class])
haftmann@24218
   675
            (EVERY [Class.intro_classes_tac [],
berghofe@17870
   676
              rewrite_goals_tac [perm_def],
berghofe@17870
   677
              asm_full_simp_tac (simpset_of thy addsimps
berghofe@17870
   678
                ((Rep RS perm_closed1 RS Abs_inverse) ::
berghofe@17870
   679
                 (if atom1 = atom2 then []
berghofe@17870
   680
                  else [Rep RS perm_closed2 RS Abs_inverse]))) 1,
berghofe@18016
   681
              cong_tac 1,
berghofe@17870
   682
              rtac refl 1,
berghofe@17870
   683
              rtac cp1' 1]) thy)
berghofe@21021
   684
        (Abs_inverse_thms ~~ Rep_thms ~~ perm_defs ~~ new_type_names ~~
berghofe@21021
   685
           tyvars ~~ perm_closed_thms1 ~~ perm_closed_thms2) thy
berghofe@17870
   686
      end;
berghofe@17870
   687
berghofe@17870
   688
    val thy7 = fold (fn x => fn thy => thy |>
berghofe@17870
   689
      pt_instance x |>
berghofe@17870
   690
      fold (cp_instance (apfst snd x)) (atoms ~~ perm_closed_thmss))
berghofe@17870
   691
        (classes ~~ atoms ~~ perm_closed_thmss) thy6;
berghofe@17870
   692
berghofe@17870
   693
    (**** constructors ****)
berghofe@17870
   694
berghofe@17870
   695
    fun mk_abs_fun (x, t) =
berghofe@17870
   696
      let
berghofe@17870
   697
        val T = fastype_of x;
berghofe@17870
   698
        val U = fastype_of t
berghofe@17870
   699
      in
berghofe@19494
   700
        Const ("Nominal.abs_fun", T --> U --> T -->
berghofe@19494
   701
          Type ("Nominal.noption", [U])) $ x $ t
berghofe@17870
   702
      end;
berghofe@17870
   703
berghofe@18016
   704
    val (ty_idxs, _) = foldl
berghofe@19494
   705
      (fn ((i, ("Nominal.noption", _, _)), p) => p
berghofe@18016
   706
        | ((i, _), (ty_idxs, j)) => (ty_idxs @ [(i, j)], j + 1)) ([], 0) descr;
berghofe@18016
   707
berghofe@18016
   708
    fun reindex (DtType (s, dts)) = DtType (s, map reindex dts)
berghofe@18016
   709
      | reindex (DtRec i) = DtRec (the (AList.lookup op = ty_idxs i))
berghofe@18016
   710
      | reindex dt = dt;
berghofe@18016
   711
berghofe@18016
   712
    fun strip_suffix i s = implode (List.take (explode s, size s - i));
berghofe@18016
   713
berghofe@18016
   714
    (** strips the "_Rep" in type names *)
wenzelm@21365
   715
    fun strip_nth_name i s =
wenzelm@21858
   716
      let val xs = NameSpace.explode s;
wenzelm@21858
   717
      in NameSpace.implode (Library.nth_map (length xs - i) (strip_suffix 4) xs) end;
berghofe@18016
   718
berghofe@18107
   719
    val (descr'', ndescr) = ListPair.unzip (List.mapPartial
berghofe@19494
   720
      (fn (i, ("Nominal.noption", _, _)) => NONE
berghofe@18107
   721
        | (i, (s, dts, constrs)) =>
berghofe@18107
   722
             let
berghofe@18107
   723
               val SOME index = AList.lookup op = ty_idxs i;
berghofe@18107
   724
               val (constrs1, constrs2) = ListPair.unzip
berghofe@19833
   725
                 (map (fn (cname, cargs) => apfst (pair (strip_nth_name 2 (strip_nth_name 1 cname)))
berghofe@18107
   726
                   (foldl_map (fn (dts, dt) =>
berghofe@18107
   727
                     let val (dts', dt') = strip_option dt
berghofe@18107
   728
                     in (dts @ dts' @ [reindex dt'], (length dts, length dts')) end)
berghofe@18107
   729
                       ([], cargs))) constrs)
berghofe@18107
   730
             in SOME ((index, (strip_nth_name 1 s,  map reindex dts, constrs1)),
berghofe@18107
   731
               (index, constrs2))
berghofe@18107
   732
             end) descr);
urbanc@18045
   733
berghofe@19489
   734
    val (descr1, descr2) = chop (length new_type_names) descr'';
berghofe@18016
   735
    val descr' = [descr1, descr2];
berghofe@18016
   736
berghofe@19710
   737
    fun partition_cargs idxs xs = map (fn (i, j) =>
berghofe@19710
   738
      (List.take (List.drop (xs, i), j), List.nth (xs, i + j))) idxs;
berghofe@19710
   739
berghofe@19833
   740
    val pdescr = map (fn ((i, (s, dts, constrs)), (_, idxss)) => (i, (s, dts,
berghofe@19833
   741
      map (fn ((cname, cargs), idxs) => (cname, partition_cargs idxs cargs))
berghofe@19833
   742
        (constrs ~~ idxss)))) (descr'' ~~ ndescr);
berghofe@19833
   743
berghofe@19833
   744
    fun nth_dtyp' i = typ_of_dtyp descr'' sorts' (DtRec i);
berghofe@17870
   745
berghofe@17870
   746
    val rep_names = map (fn s =>
berghofe@17870
   747
      Sign.intern_const thy7 ("Rep_" ^ s)) new_type_names;
berghofe@17870
   748
    val abs_names = map (fn s =>
berghofe@17870
   749
      Sign.intern_const thy7 ("Abs_" ^ s)) new_type_names;
berghofe@17870
   750
berghofe@18107
   751
    val recTs = get_rec_types descr'' sorts';
berghofe@18016
   752
    val newTs' = Library.take (length new_type_names, recTs');
berghofe@18016
   753
    val newTs = Library.take (length new_type_names, recTs);
berghofe@17870
   754
wenzelm@22578
   755
    val full_new_type_names = map (Sign.full_name thy) new_type_names;
berghofe@17870
   756
berghofe@19833
   757
    fun make_constr_def tname T T' ((thy, defs, eqns),
berghofe@19833
   758
        (((cname_rep, _), (cname, cargs)), (cname', mx))) =
berghofe@17870
   759
      let
berghofe@19833
   760
        fun constr_arg ((dts, dt), (j, l_args, r_args)) =
berghofe@17870
   761
          let
berghofe@19833
   762
            val xs = map (fn (dt, i) => mk_Free "x" (typ_of_dtyp descr'' sorts' dt) i)
berghofe@17870
   763
              (dts ~~ (j upto j + length dts - 1))
berghofe@19833
   764
            val x = mk_Free "x" (typ_of_dtyp descr'' sorts' dt) (j + length dts)
berghofe@18261
   765
          in
berghofe@18261
   766
            (j + length dts + 1,
berghofe@18261
   767
             xs @ x :: l_args,
berghofe@18261
   768
             foldr mk_abs_fun
berghofe@19833
   769
               (case dt of
berghofe@18261
   770
                  DtRec k => if k < length new_type_names then
berghofe@19833
   771
                      Const (List.nth (rep_names, k), typ_of_dtyp descr'' sorts' dt -->
berghofe@19833
   772
                        typ_of_dtyp descr sorts' dt) $ x
berghofe@18261
   773
                    else error "nested recursion not (yet) supported"
berghofe@18261
   774
                | _ => x) xs :: r_args)
berghofe@17870
   775
          end
berghofe@17870
   776
berghofe@17870
   777
        val (_, l_args, r_args) = foldr constr_arg (1, [], []) cargs;
wenzelm@22578
   778
        val abs_name = Sign.intern_const thy ("Abs_" ^ tname);
wenzelm@22578
   779
        val rep_name = Sign.intern_const thy ("Rep_" ^ tname);
berghofe@17870
   780
        val constrT = map fastype_of l_args ---> T;
berghofe@19833
   781
        val lhs = list_comb (Const (cname, constrT), l_args);
berghofe@19833
   782
        val rhs = list_comb (Const (cname_rep, map fastype_of r_args ---> T'), r_args);
berghofe@17870
   783
        val def = Logic.mk_equals (lhs, Const (abs_name, T' --> T) $ rhs);
berghofe@17870
   784
        val eqn = HOLogic.mk_Trueprop (HOLogic.mk_eq
berghofe@17870
   785
          (Const (rep_name, T --> T') $ lhs, rhs));
berghofe@17870
   786
        val def_name = (Sign.base_name cname) ^ "_def";
berghofe@18366
   787
        val ([def_thm], thy') = thy |>
wenzelm@24712
   788
          Sign.add_consts_i [(cname', constrT, mx)] |>
haftmann@27691
   789
          (PureThy.add_defs false o map Thm.no_attributes) [(def_name, def)]
berghofe@17870
   790
      in (thy', defs @ [def_thm], eqns @ [eqn]) end;
berghofe@17870
   791
berghofe@19833
   792
    fun dt_constr_defs ((thy, defs, eqns, dist_lemmas), ((((((_, (_, _, constrs)),
berghofe@19833
   793
        (_, (_, _, constrs'))), tname), T), T'), constr_syntax)) =
berghofe@17870
   794
      let
berghofe@17870
   795
        val rep_const = cterm_of thy
berghofe@17870
   796
          (Const (Sign.intern_const thy ("Rep_" ^ tname), T --> T'));
berghofe@17870
   797
        val dist = standard (cterm_instantiate [(cterm_of thy distinct_f, rep_const)] distinct_lemma);
berghofe@17870
   798
        val (thy', defs', eqns') = Library.foldl (make_constr_def tname T T')
wenzelm@24712
   799
          ((Sign.add_path tname thy, defs, []), constrs ~~ constrs' ~~ constr_syntax)
berghofe@17870
   800
      in
berghofe@17870
   801
        (parent_path flat_names thy', defs', eqns @ [eqns'], dist_lemmas @ [dist])
berghofe@17870
   802
      end;
berghofe@17870
   803
berghofe@17870
   804
    val (thy8, constr_defs, constr_rep_eqns, dist_lemmas) = Library.foldl dt_constr_defs
berghofe@17870
   805
      ((thy7, [], [], []), List.take (descr, length new_type_names) ~~
berghofe@19833
   806
        List.take (pdescr, length new_type_names) ~~
berghofe@17870
   807
        new_type_names ~~ newTs ~~ newTs' ~~ constr_syntax);
berghofe@17870
   808
berghofe@21021
   809
    val abs_inject_thms = map (collect_simp o #Abs_inject o fst) typedefs
berghofe@21021
   810
    val rep_inject_thms = map (#Rep_inject o fst) typedefs
berghofe@17870
   811
berghofe@17870
   812
    (* prove theorem  Rep_i (Constr_j ...) = Constr'_j ...  *)
wenzelm@21365
   813
berghofe@17870
   814
    fun prove_constr_rep_thm eqn =
berghofe@17870
   815
      let
berghofe@17870
   816
        val inj_thms = map (fn r => r RS iffD1) abs_inject_thms;
berghofe@21021
   817
        val rewrites = constr_defs @ map mk_meta_eq Rep_inverse_thms
wenzelm@20046
   818
      in Goal.prove_global thy8 [] [] eqn (fn _ => EVERY
berghofe@17870
   819
        [resolve_tac inj_thms 1,
berghofe@17870
   820
         rewrite_goals_tac rewrites,
berghofe@17870
   821
         rtac refl 3,
berghofe@17870
   822
         resolve_tac rep_intrs 2,
berghofe@21021
   823
         REPEAT (resolve_tac Rep_thms 1)])
berghofe@17870
   824
      end;
berghofe@17870
   825
berghofe@17870
   826
    val constr_rep_thmss = map (map prove_constr_rep_thm) constr_rep_eqns;
berghofe@17870
   827
berghofe@17870
   828
    (* prove theorem  pi \<bullet> Rep_i x = Rep_i (pi \<bullet> x) *)
berghofe@17870
   829
berghofe@17870
   830
    fun prove_perm_rep_perm (atom, perm_closed_thms) = map (fn th =>
berghofe@17870
   831
      let
berghofe@21021
   832
        val _ $ (_ $ (Rep $ x)) = Logic.unvarify (prop_of th);
berghofe@17870
   833
        val Type ("fun", [T, U]) = fastype_of Rep;
berghofe@17870
   834
        val permT = mk_permT (Type (atom, []));
berghofe@17870
   835
        val pi = Free ("pi", permT);
berghofe@17870
   836
      in
wenzelm@20046
   837
        Goal.prove_global thy8 [] [] (HOLogic.mk_Trueprop (HOLogic.mk_eq
berghofe@19494
   838
            (Const ("Nominal.perm", permT --> U --> U) $ pi $ (Rep $ x),
berghofe@19494
   839
             Rep $ (Const ("Nominal.perm", permT --> T --> T) $ pi $ x))))
berghofe@18010
   840
          (fn _ => simp_tac (HOL_basic_ss addsimps (perm_defs @ Abs_inverse_thms @
wenzelm@20046
   841
            perm_closed_thms @ Rep_thms)) 1)
berghofe@17870
   842
      end) Rep_thms;
berghofe@17870
   843
berghofe@17870
   844
    val perm_rep_perm_thms = List.concat (map prove_perm_rep_perm
berghofe@17870
   845
      (atoms ~~ perm_closed_thmss));
berghofe@17870
   846
berghofe@17870
   847
    (* prove distinctness theorems *)
berghofe@17870
   848
haftmann@26969
   849
    val distinct_props = DatatypeProp.make_distincts descr' sorts';
haftmann@27300
   850
    val dist_rewrites = map2 (fn rep_thms => fn dist_lemma =>
haftmann@27300
   851
      dist_lemma :: rep_thms @ [In0_eq, In1_eq, In0_not_In1, In1_not_In0])
haftmann@27300
   852
        constr_rep_thmss dist_lemmas;
berghofe@17870
   853
haftmann@26969
   854
    fun prove_distinct_thms _ (_, []) = []
haftmann@26969
   855
      | prove_distinct_thms (p as (rep_thms, dist_lemma)) (k, t :: ts) =
berghofe@17870
   856
          let
wenzelm@20046
   857
            val dist_thm = Goal.prove_global thy8 [] [] t (fn _ =>
wenzelm@20046
   858
              simp_tac (simpset_of thy8 addsimps (dist_lemma :: rep_thms)) 1)
haftmann@27300
   859
          in dist_thm :: standard (dist_thm RS not_sym) ::
haftmann@27300
   860
            prove_distinct_thms p (k, ts)
berghofe@17870
   861
          end;
berghofe@17870
   862
haftmann@26969
   863
    val distinct_thms = map2 prove_distinct_thms
haftmann@26969
   864
      (constr_rep_thmss ~~ dist_lemmas) distinct_props;
berghofe@17870
   865
berghofe@17870
   866
    (** prove equations for permutation functions **)
berghofe@17870
   867
berghofe@17870
   868
    val perm_simps' = map (fn (((i, (_, _, constrs)), tname), constr_rep_thms) =>
berghofe@19833
   869
      let val T = nth_dtyp' i
berghofe@17870
   870
      in List.concat (map (fn (atom, perm_closed_thms) =>
wenzelm@21365
   871
          map (fn ((cname, dts), constr_rep_thm) =>
berghofe@17870
   872
        let
berghofe@17870
   873
          val cname = Sign.intern_const thy8
berghofe@17870
   874
            (NameSpace.append tname (Sign.base_name cname));
berghofe@17870
   875
          val permT = mk_permT (Type (atom, []));
berghofe@17870
   876
          val pi = Free ("pi", permT);
berghofe@17870
   877
berghofe@17870
   878
          fun perm t =
berghofe@17870
   879
            let val T = fastype_of t
berghofe@19494
   880
            in Const ("Nominal.perm", permT --> T --> T) $ pi $ t end;
berghofe@17870
   881
berghofe@19833
   882
          fun constr_arg ((dts, dt), (j, l_args, r_args)) =
berghofe@17870
   883
            let
berghofe@19833
   884
              val Ts = map (typ_of_dtyp descr'' sorts') dts;
berghofe@17870
   885
              val xs = map (fn (T, i) => mk_Free "x" T i)
berghofe@17870
   886
                (Ts ~~ (j upto j + length dts - 1))
berghofe@19833
   887
              val x = mk_Free "x" (typ_of_dtyp descr'' sorts' dt) (j + length dts)
berghofe@18261
   888
            in
berghofe@18261
   889
              (j + length dts + 1,
berghofe@18261
   890
               xs @ x :: l_args,
berghofe@18261
   891
               map perm (xs @ [x]) @ r_args)
berghofe@17870
   892
            end
berghofe@17870
   893
berghofe@17870
   894
          val (_, l_args, r_args) = foldr constr_arg (1, [], []) dts;
berghofe@17870
   895
          val c = Const (cname, map fastype_of l_args ---> T)
berghofe@17870
   896
        in
wenzelm@20046
   897
          Goal.prove_global thy8 [] []
berghofe@17870
   898
            (HOLogic.mk_Trueprop (HOLogic.mk_eq
berghofe@18010
   899
              (perm (list_comb (c, l_args)), list_comb (c, r_args))))
berghofe@18010
   900
            (fn _ => EVERY
berghofe@17870
   901
              [simp_tac (simpset_of thy8 addsimps (constr_rep_thm :: perm_defs)) 1,
berghofe@17870
   902
               simp_tac (HOL_basic_ss addsimps (Rep_thms @ Abs_inverse_thms @
berghofe@17870
   903
                 constr_defs @ perm_closed_thms)) 1,
berghofe@17870
   904
               TRY (simp_tac (HOL_basic_ss addsimps
berghofe@17870
   905
                 (symmetric perm_fun_def :: abs_perm)) 1),
berghofe@17870
   906
               TRY (simp_tac (HOL_basic_ss addsimps
berghofe@17870
   907
                 (perm_fun_def :: perm_defs @ Rep_thms @ Abs_inverse_thms @
wenzelm@20046
   908
                    perm_closed_thms)) 1)])
berghofe@17870
   909
        end) (constrs ~~ constr_rep_thms)) (atoms ~~ perm_closed_thmss))
berghofe@19833
   910
      end) (List.take (pdescr, length new_type_names) ~~ new_type_names ~~ constr_rep_thmss);
berghofe@17870
   911
berghofe@17870
   912
    (** prove injectivity of constructors **)
berghofe@17870
   913
berghofe@17870
   914
    val rep_inject_thms' = map (fn th => th RS sym) rep_inject_thms;
wenzelm@26343
   915
    val alpha = PureThy.get_thms thy8 "alpha";
wenzelm@26343
   916
    val abs_fresh = PureThy.get_thms thy8 "abs_fresh";
berghofe@17870
   917
berghofe@17870
   918
    val inject_thms = map (fn (((i, (_, _, constrs)), tname), constr_rep_thms) =>
berghofe@19833
   919
      let val T = nth_dtyp' i
berghofe@17870
   920
      in List.mapPartial (fn ((cname, dts), constr_rep_thm) =>
berghofe@17870
   921
        if null dts then NONE else SOME
berghofe@17870
   922
        let
berghofe@17870
   923
          val cname = Sign.intern_const thy8
berghofe@17870
   924
            (NameSpace.append tname (Sign.base_name cname));
berghofe@17870
   925
berghofe@19833
   926
          fun make_inj ((dts, dt), (j, args1, args2, eqs)) =
berghofe@17870
   927
            let
berghofe@19833
   928
              val Ts_idx = map (typ_of_dtyp descr'' sorts') dts ~~ (j upto j + length dts - 1);
berghofe@17870
   929
              val xs = map (fn (T, i) => mk_Free "x" T i) Ts_idx;
berghofe@17870
   930
              val ys = map (fn (T, i) => mk_Free "y" T i) Ts_idx;
berghofe@19833
   931
              val x = mk_Free "x" (typ_of_dtyp descr'' sorts' dt) (j + length dts);
berghofe@19833
   932
              val y = mk_Free "y" (typ_of_dtyp descr'' sorts' dt) (j + length dts)
berghofe@18261
   933
            in
berghofe@18261
   934
              (j + length dts + 1,
berghofe@18261
   935
               xs @ (x :: args1), ys @ (y :: args2),
berghofe@18261
   936
               HOLogic.mk_eq
berghofe@18261
   937
                 (foldr mk_abs_fun x xs, foldr mk_abs_fun y ys) :: eqs)
berghofe@17870
   938
            end;
berghofe@17870
   939
berghofe@17870
   940
          val (_, args1, args2, eqs) = foldr make_inj (1, [], [], []) dts;
berghofe@17870
   941
          val Ts = map fastype_of args1;
berghofe@17870
   942
          val c = Const (cname, Ts ---> T)
berghofe@17870
   943
        in
wenzelm@20046
   944
          Goal.prove_global thy8 [] [] (HOLogic.mk_Trueprop (HOLogic.mk_eq
berghofe@17870
   945
              (HOLogic.mk_eq (list_comb (c, args1), list_comb (c, args2)),
berghofe@18010
   946
               foldr1 HOLogic.mk_conj eqs)))
berghofe@18010
   947
            (fn _ => EVERY
berghofe@17870
   948
               [asm_full_simp_tac (simpset_of thy8 addsimps (constr_rep_thm ::
berghofe@17870
   949
                  rep_inject_thms')) 1,
berghofe@17870
   950
                TRY (asm_full_simp_tac (HOL_basic_ss addsimps (fresh_def :: supp_def ::
berghofe@17870
   951
                  alpha @ abs_perm @ abs_fresh @ rep_inject_thms @
berghofe@17874
   952
                  perm_rep_perm_thms)) 1),
berghofe@17874
   953
                TRY (asm_full_simp_tac (HOL_basic_ss addsimps (perm_fun_def ::
haftmann@26359
   954
                  @{thm expand_fun_eq} :: rep_inject_thms @ perm_rep_perm_thms)) 1)])
berghofe@17870
   955
        end) (constrs ~~ constr_rep_thms)
berghofe@19833
   956
      end) (List.take (pdescr, length new_type_names) ~~ new_type_names ~~ constr_rep_thmss);
berghofe@17870
   957
berghofe@17872
   958
    (** equations for support and freshness **)
berghofe@17872
   959
berghofe@17872
   960
    val (supp_thms, fresh_thms) = ListPair.unzip (map ListPair.unzip
berghofe@17872
   961
      (map (fn ((((i, (_, _, constrs)), tname), inject_thms'), perm_thms') =>
berghofe@19833
   962
      let val T = nth_dtyp' i
berghofe@17872
   963
      in List.concat (map (fn (cname, dts) => map (fn atom =>
berghofe@17872
   964
        let
berghofe@17872
   965
          val cname = Sign.intern_const thy8
berghofe@17872
   966
            (NameSpace.append tname (Sign.base_name cname));
berghofe@17872
   967
          val atomT = Type (atom, []);
berghofe@17872
   968
berghofe@19833
   969
          fun process_constr ((dts, dt), (j, args1, args2)) =
berghofe@17872
   970
            let
berghofe@19833
   971
              val Ts_idx = map (typ_of_dtyp descr'' sorts') dts ~~ (j upto j + length dts - 1);
berghofe@17872
   972
              val xs = map (fn (T, i) => mk_Free "x" T i) Ts_idx;
berghofe@19833
   973
              val x = mk_Free "x" (typ_of_dtyp descr'' sorts' dt) (j + length dts)
berghofe@18261
   974
            in
berghofe@18261
   975
              (j + length dts + 1,
berghofe@18261
   976
               xs @ (x :: args1), foldr mk_abs_fun x xs :: args2)
berghofe@17872
   977
            end;
berghofe@17872
   978
berghofe@17872
   979
          val (_, args1, args2) = foldr process_constr (1, [], []) dts;
berghofe@17872
   980
          val Ts = map fastype_of args1;
berghofe@17872
   981
          val c = list_comb (Const (cname, Ts ---> T), args1);
berghofe@17872
   982
          fun supp t =
berghofe@19494
   983
            Const ("Nominal.supp", fastype_of t --> HOLogic.mk_setT atomT) $ t;
berghofe@25823
   984
          fun fresh t = fresh_const atomT (fastype_of t) $ Free ("a", atomT) $ t;
wenzelm@20046
   985
          val supp_thm = Goal.prove_global thy8 [] []
berghofe@17872
   986
              (HOLogic.mk_Trueprop (HOLogic.mk_eq
berghofe@17872
   987
                (supp c,
berghofe@17872
   988
                 if null dts then Const ("{}", HOLogic.mk_setT atomT)
berghofe@18010
   989
                 else foldr1 (HOLogic.mk_binop "op Un") (map supp args2))))
berghofe@17872
   990
            (fn _ =>
berghofe@18010
   991
              simp_tac (HOL_basic_ss addsimps (supp_def ::
berghofe@17872
   992
                 Un_assoc :: de_Morgan_conj :: Collect_disj_eq :: finite_Un ::
berghofe@22274
   993
                 symmetric empty_def :: finite_emptyI :: simp_thms @
wenzelm@20046
   994
                 abs_perm @ abs_fresh @ inject_thms' @ perm_thms')) 1)
berghofe@17872
   995
        in
berghofe@17872
   996
          (supp_thm,
wenzelm@20046
   997
           Goal.prove_global thy8 [] [] (HOLogic.mk_Trueprop (HOLogic.mk_eq
berghofe@17872
   998
              (fresh c,
berghofe@17872
   999
               if null dts then HOLogic.true_const
berghofe@18010
  1000
               else foldr1 HOLogic.mk_conj (map fresh args2))))
berghofe@17872
  1001
             (fn _ =>
berghofe@24459
  1002
               simp_tac (HOL_ss addsimps [Un_iff, empty_iff, fresh_def, supp_thm]) 1))
berghofe@17872
  1003
        end) atoms) constrs)
berghofe@19833
  1004
      end) (List.take (pdescr, length new_type_names) ~~ new_type_names ~~ inject_thms ~~ perm_simps')));
berghofe@17872
  1005
berghofe@18107
  1006
    (**** weak induction theorem ****)
berghofe@18016
  1007
berghofe@18016
  1008
    fun mk_indrule_lemma ((prems, concls), (((i, _), T), U)) =
berghofe@18016
  1009
      let
berghofe@18016
  1010
        val Rep_t = Const (List.nth (rep_names, i), T --> U) $
berghofe@18016
  1011
          mk_Free "x" T i;
berghofe@18016
  1012
berghofe@18016
  1013
        val Abs_t =  Const (List.nth (abs_names, i), U --> T)
berghofe@18016
  1014
berghofe@21021
  1015
      in (prems @ [HOLogic.imp $
berghofe@21021
  1016
            (Const (List.nth (rep_set_names'', i), U --> HOLogic.boolT) $ Rep_t) $
berghofe@18016
  1017
              (mk_Free "P" (T --> HOLogic.boolT) (i + 1) $ (Abs_t $ Rep_t))],
berghofe@18016
  1018
          concls @ [mk_Free "P" (T --> HOLogic.boolT) (i + 1) $ mk_Free "x" T i])
berghofe@18016
  1019
      end;
berghofe@18016
  1020
berghofe@18016
  1021
    val (indrule_lemma_prems, indrule_lemma_concls) =
berghofe@18107
  1022
      Library.foldl mk_indrule_lemma (([], []), (descr'' ~~ recTs ~~ recTs'));
berghofe@18016
  1023
wenzelm@20046
  1024
    val indrule_lemma = Goal.prove_global thy8 [] []
berghofe@18016
  1025
      (Logic.mk_implies
berghofe@18016
  1026
        (HOLogic.mk_Trueprop (mk_conj indrule_lemma_prems),
berghofe@18016
  1027
         HOLogic.mk_Trueprop (mk_conj indrule_lemma_concls))) (fn _ => EVERY
berghofe@18016
  1028
           [REPEAT (etac conjE 1),
berghofe@18016
  1029
            REPEAT (EVERY
berghofe@18016
  1030
              [TRY (rtac conjI 1), full_simp_tac (HOL_basic_ss addsimps Rep_inverse_thms) 1,
wenzelm@20046
  1031
               etac mp 1, resolve_tac Rep_thms 1])]);
berghofe@18016
  1032
berghofe@18016
  1033
    val Ps = map head_of (HOLogic.dest_conj (HOLogic.dest_Trueprop (concl_of indrule_lemma)));
berghofe@18016
  1034
    val frees = if length Ps = 1 then [Free ("P", snd (dest_Var (hd Ps)))] else
berghofe@18016
  1035
      map (Free o apfst fst o dest_Var) Ps;
berghofe@18016
  1036
    val indrule_lemma' = cterm_instantiate
berghofe@18016
  1037
      (map (cterm_of thy8) Ps ~~ map (cterm_of thy8) frees) indrule_lemma;
berghofe@18016
  1038
berghofe@19833
  1039
    val Abs_inverse_thms' = map (fn r => r RS subst) Abs_inverse_thms;
berghofe@18016
  1040
berghofe@18016
  1041
    val dt_induct_prop = DatatypeProp.make_ind descr' sorts';
wenzelm@20046
  1042
    val dt_induct = Goal.prove_global thy8 []
berghofe@18016
  1043
      (Logic.strip_imp_prems dt_induct_prop) (Logic.strip_imp_concl dt_induct_prop)
wenzelm@26711
  1044
      (fn {prems, ...} => EVERY
berghofe@18016
  1045
        [rtac indrule_lemma' 1,
berghofe@25674
  1046
         (indtac rep_induct [] THEN_ALL_NEW ObjectLogic.atomize_prems_tac) 1,
berghofe@18016
  1047
         EVERY (map (fn (prem, r) => (EVERY
berghofe@18016
  1048
           [REPEAT (eresolve_tac Abs_inverse_thms' 1),
berghofe@18016
  1049
            simp_tac (HOL_basic_ss addsimps [symmetric r]) 1,
berghofe@18016
  1050
            DEPTH_SOLVE_1 (ares_tac [prem] 1 ORELSE etac allE 1)]))
wenzelm@20046
  1051
                (prems ~~ constr_defs))]);
berghofe@18016
  1052
berghofe@18107
  1053
    val case_names_induct = mk_case_names_induct descr'';
berghofe@18016
  1054
berghofe@18066
  1055
    (**** prove that new datatypes have finite support ****)
berghofe@18066
  1056
urbanc@18246
  1057
    val _ = warning "proving finite support for the new datatype";
urbanc@18246
  1058
berghofe@18066
  1059
    val indnames = DatatypeProp.make_tnames recTs;
berghofe@18066
  1060
wenzelm@26343
  1061
    val abs_supp = PureThy.get_thms thy8 "abs_supp";
wenzelm@26343
  1062
    val supp_atm = PureThy.get_thms thy8 "supp_atm";
berghofe@18066
  1063
berghofe@18066
  1064
    val finite_supp_thms = map (fn atom =>
berghofe@18066
  1065
      let val atomT = Type (atom, [])
berghofe@18066
  1066
      in map standard (List.take
wenzelm@20046
  1067
        (split_conj_thm (Goal.prove_global thy8 [] [] (HOLogic.mk_Trueprop
berghofe@22274
  1068
           (foldr1 HOLogic.mk_conj (map (fn (s, T) =>
berghofe@22274
  1069
             Const ("Finite_Set.finite", HOLogic.mk_setT atomT --> HOLogic.boolT) $
berghofe@22274
  1070
               (Const ("Nominal.supp", T --> HOLogic.mk_setT atomT) $ Free (s, T)))
berghofe@18066
  1071
               (indnames ~~ recTs))))
berghofe@18066
  1072
           (fn _ => indtac dt_induct indnames 1 THEN
berghofe@18066
  1073
            ALLGOALS (asm_full_simp_tac (simpset_of thy8 addsimps
urbanc@18067
  1074
              (abs_supp @ supp_atm @
wenzelm@26343
  1075
               PureThy.get_thms thy8 ("fs_" ^ Sign.base_name atom ^ "1") @
berghofe@18066
  1076
               List.concat supp_thms))))),
berghofe@18066
  1077
         length new_type_names))
berghofe@18066
  1078
      end) atoms;
berghofe@18066
  1079
krauss@18759
  1080
    val simp_atts = replicate (length new_type_names) [Simplifier.simp_add];
berghofe@18658
  1081
urbanc@22245
  1082
	(* Function to add both the simp and eqvt attributes *)
urbanc@22245
  1083
        (* These two attributes are duplicated on all the types in the mutual nominal datatypes *)
urbanc@22245
  1084
urbanc@22245
  1085
    val simp_eqvt_atts = replicate (length new_type_names) [Simplifier.simp_add, NominalThmDecls.eqvt_add];
urbanc@22245
  1086
 
berghofe@18658
  1087
    val (_, thy9) = thy8 |>
wenzelm@24712
  1088
      Sign.add_path big_name |>
urbanc@26966
  1089
      PureThy.add_thms [(("induct", dt_induct), [case_names_induct])] ||>>
urbanc@26966
  1090
      PureThy.add_thmss [(("inducts", projections dt_induct), [case_names_induct])] ||>
wenzelm@24712
  1091
      Sign.parent_path ||>>
berghofe@18658
  1092
      DatatypeAux.store_thmss_atts "distinct" new_type_names simp_atts distinct_thms ||>>
berghofe@18658
  1093
      DatatypeAux.store_thmss "constr_rep" new_type_names constr_rep_thmss ||>>
urbanc@22231
  1094
      DatatypeAux.store_thmss_atts "perm" new_type_names simp_eqvt_atts perm_simps' ||>>
berghofe@18658
  1095
      DatatypeAux.store_thmss "inject" new_type_names inject_thms ||>>
berghofe@18658
  1096
      DatatypeAux.store_thmss "supp" new_type_names supp_thms ||>>
berghofe@18658
  1097
      DatatypeAux.store_thmss_atts "fresh" new_type_names simp_atts fresh_thms ||>
berghofe@18658
  1098
      fold (fn (atom, ths) => fn thy =>
berghofe@18658
  1099
        let val class = Sign.intern_class thy ("fs_" ^ Sign.base_name atom)
berghofe@19275
  1100
        in fold (fn T => AxClass.prove_arity
berghofe@18658
  1101
            (fst (dest_Type T),
berghofe@18658
  1102
              replicate (length sorts) [class], [class])
haftmann@24218
  1103
            (Class.intro_classes_tac [] THEN resolve_tac ths 1)) newTs thy
berghofe@18658
  1104
        end) (atoms ~~ finite_supp_thms);
berghofe@18658
  1105
berghofe@18107
  1106
    (**** strong induction theorem ****)
berghofe@18107
  1107
berghofe@18107
  1108
    val pnames = if length descr'' = 1 then ["P"]
berghofe@18107
  1109
      else map (fn i => "P" ^ string_of_int i) (1 upto length descr'');
berghofe@18245
  1110
    val ind_sort = if null dt_atomTs then HOLogic.typeS
wenzelm@19649
  1111
      else Sign.certify_sort thy9 (map (fn T => Sign.intern_class thy9 ("fs_" ^
berghofe@18658
  1112
        Sign.base_name (fst (dest_Type T)))) dt_atomTs);
berghofe@18107
  1113
    val fsT = TFree ("'n", ind_sort);
berghofe@18658
  1114
    val fsT' = TFree ("'n", HOLogic.typeS);
berghofe@18107
  1115
berghofe@18658
  1116
    val fresh_fs = map (fn (s, T) => (T, Free (s, fsT' --> HOLogic.mk_setT T)))
berghofe@18658
  1117
      (DatatypeProp.indexify_names (replicate (length dt_atomTs) "f") ~~ dt_atomTs);
berghofe@18658
  1118
berghofe@18658
  1119
    fun make_pred fsT i T =
berghofe@18302
  1120
      Free (List.nth (pnames, i), fsT --> T --> HOLogic.boolT);
berghofe@18107
  1121
berghofe@19851
  1122
    fun mk_fresh1 xs [] = []
berghofe@19851
  1123
      | mk_fresh1 xs ((y as (_, T)) :: ys) = map (fn x => HOLogic.mk_Trueprop
berghofe@19851
  1124
            (HOLogic.mk_not (HOLogic.mk_eq (Free y, Free x))))
berghofe@19851
  1125
              (filter (fn (_, U) => T = U) (rev xs)) @
berghofe@19851
  1126
          mk_fresh1 (y :: xs) ys;
berghofe@19851
  1127
berghofe@19851
  1128
    fun mk_fresh2 xss [] = []
berghofe@19851
  1129
      | mk_fresh2 xss ((p as (ys, _)) :: yss) = List.concat (map (fn y as (_, T) =>
berghofe@19851
  1130
            map (fn (_, x as (_, U)) => HOLogic.mk_Trueprop
berghofe@25823
  1131
              (fresh_const T U $ Free y $ Free x)) (rev xss @ yss)) ys) @
berghofe@19851
  1132
          mk_fresh2 (p :: xss) yss;
berghofe@19851
  1133
berghofe@18658
  1134
    fun make_ind_prem fsT f k T ((cname, cargs), idxs) =
berghofe@18107
  1135
      let
berghofe@18107
  1136
        val recs = List.filter is_rec_type cargs;
berghofe@18107
  1137
        val Ts = map (typ_of_dtyp descr'' sorts') cargs;
berghofe@18107
  1138
        val recTs' = map (typ_of_dtyp descr'' sorts') recs;
wenzelm@20071
  1139
        val tnames = Name.variant_list pnames (DatatypeProp.make_tnames Ts);
berghofe@18107
  1140
        val rec_tnames = map fst (List.filter (is_rec_type o snd) (tnames ~~ cargs));
berghofe@18107
  1141
        val frees = tnames ~~ Ts;
berghofe@19710
  1142
        val frees' = partition_cargs idxs frees;
wenzelm@20071
  1143
        val z = (Name.variant tnames "z", fsT);
berghofe@18107
  1144
berghofe@18107
  1145
        fun mk_prem ((dt, s), T) =
berghofe@18107
  1146
          let
berghofe@18107
  1147
            val (Us, U) = strip_type T;
berghofe@18107
  1148
            val l = length Us
berghofe@18107
  1149
          in list_all (z :: map (pair "x") Us, HOLogic.mk_Trueprop
berghofe@18658
  1150
            (make_pred fsT (body_index dt) U $ Bound l $ app_bnds (Free (s, T)) l))
berghofe@18107
  1151
          end;
berghofe@18107
  1152
berghofe@18107
  1153
        val prems = map mk_prem (recs ~~ rec_tnames ~~ recTs');
berghofe@18107
  1154
        val prems' = map (fn p as (_, T) => HOLogic.mk_Trueprop
berghofe@19710
  1155
            (f T (Free p) (Free z))) (List.concat (map fst frees')) @
berghofe@19710
  1156
          mk_fresh1 [] (List.concat (map fst frees')) @
berghofe@19710
  1157
          mk_fresh2 [] frees'
berghofe@18107
  1158
berghofe@18302
  1159
      in list_all_free (frees @ [z], Logic.list_implies (prems' @ prems,
berghofe@18658
  1160
        HOLogic.mk_Trueprop (make_pred fsT k T $ Free z $
berghofe@18302
  1161
          list_comb (Const (cname, Ts ---> T), map Free frees))))
berghofe@18107
  1162
      end;
berghofe@18107
  1163
berghofe@18107
  1164
    val ind_prems = List.concat (map (fn (((i, (_, _, constrs)), (_, idxss)), T) =>
berghofe@18658
  1165
      map (make_ind_prem fsT (fn T => fn t => fn u =>
berghofe@25823
  1166
        fresh_const T fsT $ t $ u) i T)
berghofe@18658
  1167
          (constrs ~~ idxss)) (descr'' ~~ ndescr ~~ recTs));
berghofe@18107
  1168
    val tnames = DatatypeProp.make_tnames recTs;
wenzelm@20071
  1169
    val zs = Name.variant_list tnames (replicate (length descr'') "z");
berghofe@18107
  1170
    val ind_concl = HOLogic.mk_Trueprop (foldr1 (HOLogic.mk_binop "op &")
berghofe@18658
  1171
      (map (fn ((((i, _), T), tname), z) =>
berghofe@18658
  1172
        make_pred fsT i T $ Free (z, fsT) $ Free (tname, T))
berghofe@18658
  1173
        (descr'' ~~ recTs ~~ tnames ~~ zs)));
berghofe@18107
  1174
    val induct = Logic.list_implies (ind_prems, ind_concl);
berghofe@18107
  1175
berghofe@18658
  1176
    val ind_prems' =
berghofe@18658
  1177
      map (fn (_, f as Free (_, T)) => list_all_free ([("x", fsT')],
berghofe@26806
  1178
        HOLogic.mk_Trueprop (Const ("Finite_Set.finite",
berghofe@26806
  1179
          (snd (split_last (binder_types T)) --> HOLogic.boolT) -->
berghofe@26806
  1180
            HOLogic.boolT) $ (f $ Free ("x", fsT'))))) fresh_fs @
berghofe@18658
  1181
      List.concat (map (fn (((i, (_, _, constrs)), (_, idxss)), T) =>
berghofe@18658
  1182
        map (make_ind_prem fsT' (fn T => fn t => fn u => HOLogic.Not $
berghofe@18658
  1183
          HOLogic.mk_mem (t, the (AList.lookup op = fresh_fs T) $ u)) i T)
berghofe@18658
  1184
            (constrs ~~ idxss)) (descr'' ~~ ndescr ~~ recTs));
berghofe@18658
  1185
    val ind_concl' = HOLogic.mk_Trueprop (foldr1 (HOLogic.mk_binop "op &")
berghofe@18658
  1186
      (map (fn ((((i, _), T), tname), z) =>
berghofe@18658
  1187
        make_pred fsT' i T $ Free (z, fsT') $ Free (tname, T))
berghofe@18658
  1188
        (descr'' ~~ recTs ~~ tnames ~~ zs)));
berghofe@18658
  1189
    val induct' = Logic.list_implies (ind_prems', ind_concl');
berghofe@18658
  1190
berghofe@18658
  1191
    val aux_ind_vars =
berghofe@18658
  1192
      (DatatypeProp.indexify_names (replicate (length dt_atomTs) "pi") ~~
berghofe@18658
  1193
       map mk_permT dt_atomTs) @ [("z", fsT')];
berghofe@18658
  1194
    val aux_ind_Ts = rev (map snd aux_ind_vars);
berghofe@18658
  1195
    val aux_ind_concl = HOLogic.mk_Trueprop (foldr1 (HOLogic.mk_binop "op &")
berghofe@18658
  1196
      (map (fn (((i, _), T), tname) =>
berghofe@18658
  1197
        HOLogic.list_all (aux_ind_vars, make_pred fsT' i T $ Bound 0 $
berghofe@22311
  1198
          fold_rev (mk_perm aux_ind_Ts) (map Bound (length dt_atomTs downto 1))
berghofe@22311
  1199
            (Free (tname, T))))
berghofe@18658
  1200
        (descr'' ~~ recTs ~~ tnames)));
berghofe@18658
  1201
berghofe@25951
  1202
    val fin_set_supp = map (fn Type (s, _) =>
wenzelm@26343
  1203
      PureThy.get_thm thy9 ("at_" ^ Sign.base_name s ^ "_inst") RS
berghofe@25951
  1204
        at_fin_set_supp) dt_atomTs;
berghofe@25951
  1205
    val fin_set_fresh = map (fn Type (s, _) =>
wenzelm@26343
  1206
      PureThy.get_thm thy9 ("at_" ^ Sign.base_name s ^ "_inst") RS
berghofe@25951
  1207
        at_fin_set_fresh) dt_atomTs;
berghofe@25951
  1208
    val pt1_atoms = map (fn Type (s, _) =>
wenzelm@26343
  1209
      PureThy.get_thm thy9 ("pt_" ^ Sign.base_name s ^ "1")) dt_atomTs;
berghofe@25951
  1210
    val pt2_atoms = map (fn Type (s, _) =>
wenzelm@26343
  1211
      PureThy.get_thm thy9 ("pt_" ^ Sign.base_name s ^ "2") RS sym) dt_atomTs;
wenzelm@26343
  1212
    val exists_fresh' = PureThy.get_thms thy9 "exists_fresh'";
wenzelm@26343
  1213
    val fs_atoms = PureThy.get_thms thy9 "fin_supp";
wenzelm@26343
  1214
    val abs_supp = PureThy.get_thms thy9 "abs_supp";
wenzelm@26343
  1215
    val perm_fresh_fresh = PureThy.get_thms thy9 "perm_fresh_fresh";
wenzelm@26343
  1216
    val calc_atm = PureThy.get_thms thy9 "calc_atm";
wenzelm@26343
  1217
    val fresh_atm = PureThy.get_thms thy9 "fresh_atm";
wenzelm@26343
  1218
    val fresh_left = PureThy.get_thms thy9 "fresh_left";
wenzelm@26343
  1219
    val perm_swap = PureThy.get_thms thy9 "perm_swap";
berghofe@18658
  1220
berghofe@25951
  1221
    fun obtain_fresh_name' ths ts T (freshs1, freshs2, ctxt) =
berghofe@18658
  1222
      let
berghofe@25951
  1223
        val p = foldr1 HOLogic.mk_prod (ts @ freshs1);
berghofe@25951
  1224
        val ex = Goal.prove ctxt [] [] (HOLogic.mk_Trueprop
berghofe@25951
  1225
            (HOLogic.exists_const T $ Abs ("x", T,
berghofe@25951
  1226
              fresh_const T (fastype_of p) $
berghofe@25951
  1227
                Bound 0 $ p)))
berghofe@25951
  1228
          (fn _ => EVERY
berghofe@25951
  1229
            [resolve_tac exists_fresh' 1,
berghofe@25951
  1230
             simp_tac (HOL_ss addsimps (supp_prod :: finite_Un :: fs_atoms @
berghofe@25951
  1231
               fin_set_supp @ ths)) 1]);
berghofe@25951
  1232
        val (([cx], ths), ctxt') = Obtain.result
berghofe@25951
  1233
          (fn _ => EVERY
berghofe@25951
  1234
            [etac exE 1,
berghofe@25951
  1235
             full_simp_tac (HOL_ss addsimps (fresh_prod :: fresh_atm)) 1,
berghofe@25951
  1236
             REPEAT (etac conjE 1)])
berghofe@25951
  1237
          [ex] ctxt
berghofe@25951
  1238
      in (freshs1 @ [term_of cx], freshs2 @ ths, ctxt') end;
berghofe@25951
  1239
berghofe@25951
  1240
    fun fresh_fresh_inst thy a b =
berghofe@25951
  1241
      let
berghofe@25951
  1242
        val T = fastype_of a;
berghofe@25951
  1243
        val SOME th = find_first (fn th => case prop_of th of
berghofe@25951
  1244
            _ $ (_ $ (Const (_, Type (_, [U, _])) $ _ $ _)) $ _ => U = T
berghofe@25951
  1245
          | _ => false) perm_fresh_fresh
berghofe@18658
  1246
      in
berghofe@25951
  1247
        Drule.instantiate' []
berghofe@25951
  1248
          [SOME (cterm_of thy a), NONE, SOME (cterm_of thy b)] th
berghofe@18658
  1249
      end;
urbanc@18104
  1250
berghofe@19710
  1251
    (**********************************************************************
berghofe@19710
  1252
      The subgoals occurring in the proof of induct_aux have the
berghofe@19710
  1253
      following parameters:
berghofe@19710
  1254
berghofe@25951
  1255
        x_1 ... x_k p_1 ... p_m z
berghofe@19710
  1256
berghofe@19710
  1257
      where
berghofe@19710
  1258
berghofe@19710
  1259
        x_i : constructor arguments (introduced by weak induction rule)
berghofe@19710
  1260
        p_i : permutations (one for each atom type in the data type)
berghofe@19710
  1261
        z   : freshness context
berghofe@19710
  1262
    ***********************************************************************)
berghofe@19710
  1263
berghofe@19710
  1264
    val _ = warning "proving strong induction theorem ...";
berghofe@19710
  1265
wenzelm@26711
  1266
    val induct_aux = Goal.prove_global thy9 [] ind_prems' ind_concl' (fn {prems, context} =>
berghofe@25951
  1267
      let
berghofe@25951
  1268
        val (prems1, prems2) = chop (length dt_atomTs) prems;
berghofe@25951
  1269
        val ind_ss2 = HOL_ss addsimps
berghofe@25951
  1270
          finite_Diff :: abs_fresh @ abs_supp @ fs_atoms;
berghofe@25951
  1271
        val ind_ss1 = ind_ss2 addsimps fresh_left @ calc_atm @
berghofe@25951
  1272
          fresh_atm @ rev_simps @ app_simps;
berghofe@25951
  1273
        val ind_ss3 = HOL_ss addsimps abs_fun_eq1 ::
berghofe@25951
  1274
          abs_perm @ calc_atm @ perm_swap;
berghofe@25951
  1275
        val ind_ss4 = HOL_basic_ss addsimps fresh_left @ prems1 @
berghofe@25951
  1276
          fin_set_fresh @ calc_atm;
berghofe@25951
  1277
        val ind_ss5 = HOL_basic_ss addsimps pt1_atoms;
berghofe@25951
  1278
        val ind_ss6 = HOL_basic_ss addsimps flat perm_simps';
wenzelm@26711
  1279
        val th = Goal.prove context [] [] aux_ind_concl
berghofe@25951
  1280
          (fn {context = context1, ...} =>
berghofe@25951
  1281
             EVERY (indtac dt_induct tnames 1 ::
berghofe@25951
  1282
               maps (fn ((_, (_, _, constrs)), (_, constrs')) =>
berghofe@25951
  1283
                 map (fn ((cname, cargs), is) =>
berghofe@25951
  1284
                   REPEAT (rtac allI 1) THEN
berghofe@25951
  1285
                   SUBPROOF (fn {prems = iprems, params, concl,
berghofe@25951
  1286
                       context = context2, ...} =>
berghofe@18658
  1287
                     let
berghofe@25951
  1288
                       val concl' = term_of concl;
berghofe@25951
  1289
                       val _ $ (_ $ _ $ u) = concl';
berghofe@25951
  1290
                       val U = fastype_of u;
berghofe@25951
  1291
                       val (xs, params') =
berghofe@25951
  1292
                         chop (length cargs) (map term_of params);
berghofe@25951
  1293
                       val Ts = map fastype_of xs;
berghofe@25951
  1294
                       val cnstr = Const (cname, Ts ---> U);
berghofe@25951
  1295
                       val (pis, z) = split_last params';
berghofe@25951
  1296
                       val mk_pi = fold_rev (mk_perm []) pis;
berghofe@25951
  1297
                       val xs' = partition_cargs is xs;
berghofe@25951
  1298
                       val xs'' = map (fn (ts, u) => (map mk_pi ts, mk_pi u)) xs';
berghofe@25951
  1299
                       val ts = maps (fn (ts, u) => ts @ [u]) xs'';
berghofe@25951
  1300
                       val (freshs1, freshs2, context3) = fold (fn t =>
berghofe@25951
  1301
                         let val T = fastype_of t
berghofe@25951
  1302
                         in obtain_fresh_name' prems1
berghofe@25951
  1303
                           (the (AList.lookup op = fresh_fs T) $ z :: ts) T
berghofe@25951
  1304
                         end) (maps fst xs') ([], [], context2);
berghofe@25951
  1305
                       val freshs1' = unflat (map fst xs') freshs1;
berghofe@25951
  1306
                       val freshs2' = map (Simplifier.simplify ind_ss4)
berghofe@25951
  1307
                         (mk_not_sym freshs2);
berghofe@25951
  1308
                       val ind_ss1' = ind_ss1 addsimps freshs2';
berghofe@25951
  1309
                       val ind_ss3' = ind_ss3 addsimps freshs2';
berghofe@25951
  1310
                       val rename_eq =
berghofe@25951
  1311
                         if forall (null o fst) xs' then []
berghofe@25951
  1312
                         else [Goal.prove context3 [] []
berghofe@25951
  1313
                           (HOLogic.mk_Trueprop (HOLogic.mk_eq
berghofe@25951
  1314
                             (list_comb (cnstr, ts),
berghofe@25951
  1315
                              list_comb (cnstr, maps (fn ((bs, t), cs) =>
berghofe@25951
  1316
                                cs @ [fold_rev (mk_perm []) (map perm_of_pair
berghofe@25951
  1317
                                  (bs ~~ cs)) t]) (xs'' ~~ freshs1')))))
berghofe@25951
  1318
                           (fn _ => EVERY
berghofe@25951
  1319
                              (simp_tac (HOL_ss addsimps flat inject_thms) 1 ::
berghofe@25951
  1320
                               REPEAT (FIRSTGOAL (rtac conjI)) ::
berghofe@25951
  1321
                               maps (fn ((bs, t), cs) =>
berghofe@25951
  1322
                                 if null bs then []
berghofe@25951
  1323
                                 else rtac sym 1 :: maps (fn (b, c) =>
berghofe@25951
  1324
                                   [rtac trans 1, rtac sym 1,
berghofe@25951
  1325
                                    rtac (fresh_fresh_inst thy9 b c) 1,
berghofe@25951
  1326
                                    simp_tac ind_ss1' 1,
berghofe@25951
  1327
                                    simp_tac ind_ss2 1,
berghofe@25951
  1328
                                    simp_tac ind_ss3' 1]) (bs ~~ cs))
berghofe@25951
  1329
                                 (xs'' ~~ freshs1')))];
berghofe@25951
  1330
                       val th = Goal.prove context3 [] [] concl' (fn _ => EVERY
berghofe@25951
  1331
                         [simp_tac (ind_ss6 addsimps rename_eq) 1,
berghofe@25951
  1332
                          cut_facts_tac iprems 1,
berghofe@25951
  1333
                          (resolve_tac prems THEN_ALL_NEW
berghofe@25951
  1334
                            SUBGOAL (fn (t, i) => case Logic.strip_assums_concl t of
berghofe@25951
  1335
                                _ $ (Const ("Nominal.fresh", _) $ _ $ _) =>
berghofe@25951
  1336
                                  simp_tac ind_ss1' i
berghofe@25951
  1337
                              | _ $ (Const ("Not", _) $ _) =>
berghofe@25951
  1338
                                  resolve_tac freshs2' i
berghofe@25951
  1339
                              | _ => asm_simp_tac (HOL_basic_ss addsimps
berghofe@25951
  1340
                                  pt2_atoms addsimprocs [perm_simproc]) i)) 1])
berghofe@25951
  1341
                       val final = ProofContext.export context3 context2 [th]
berghofe@18658
  1342
                     in
berghofe@25951
  1343
                       resolve_tac final 1
berghofe@25951
  1344
                     end) context1 1) (constrs ~~ constrs')) (descr'' ~~ ndescr)))
berghofe@25951
  1345
      in
berghofe@25951
  1346
        EVERY
berghofe@25951
  1347
          [cut_facts_tac [th] 1,
wenzelm@27228
  1348
           REPEAT (eresolve_tac [conjE, @{thm allE_Nil}] 1),
berghofe@25951
  1349
           REPEAT (etac allE 1),
berghofe@25951
  1350
           REPEAT (TRY (rtac conjI 1) THEN asm_full_simp_tac ind_ss5 1)]
berghofe@25951
  1351
      end);
berghofe@18658
  1352
berghofe@18658
  1353
    val induct_aux' = Thm.instantiate ([],
berghofe@18658
  1354
      map (fn (s, T) =>
berghofe@18658
  1355
        let val pT = TVar (("'n", 0), HOLogic.typeS) --> T --> HOLogic.boolT
berghofe@18658
  1356
        in (cterm_of thy9 (Var ((s, 0), pT)), cterm_of thy9 (Free (s, pT))) end)
berghofe@18658
  1357
          (pnames ~~ recTs) @
berghofe@18658
  1358
      map (fn (_, f) =>
berghofe@18658
  1359
        let val f' = Logic.varify f
berghofe@18658
  1360
        in (cterm_of thy9 f',
berghofe@19494
  1361
          cterm_of thy9 (Const ("Nominal.supp", fastype_of f')))
berghofe@18658
  1362
        end) fresh_fs) induct_aux;
berghofe@18658
  1363
wenzelm@20046
  1364
    val induct = Goal.prove_global thy9 [] ind_prems ind_concl
wenzelm@26711
  1365
      (fn {prems, ...} => EVERY
berghofe@18658
  1366
         [rtac induct_aux' 1,
berghofe@25951
  1367
          REPEAT (resolve_tac fs_atoms 1),
berghofe@18658
  1368
          REPEAT ((resolve_tac prems THEN_ALL_NEW
wenzelm@20046
  1369
            (etac meta_spec ORELSE' full_simp_tac (HOL_basic_ss addsimps [fresh_def]))) 1)])
berghofe@18658
  1370
berghofe@18658
  1371
    val (_, thy10) = thy9 |>
wenzelm@24712
  1372
      Sign.add_path big_name |>
urbanc@26966
  1373
      PureThy.add_thms [(("strong_induct'", induct_aux), [])] ||>>
urbanc@26966
  1374
      PureThy.add_thms [(("strong_induct", induct), [case_names_induct])] ||>>
urbanc@26966
  1375
      PureThy.add_thmss [(("strong_inducts", projections induct), [case_names_induct])];
berghofe@18658
  1376
berghofe@19322
  1377
    (**** recursion combinator ****)
berghofe@19251
  1378
berghofe@19322
  1379
    val _ = warning "defining recursion combinator ...";
berghofe@19251
  1380
berghofe@19251
  1381
    val used = foldr add_typ_tfree_names [] recTs;
berghofe@19251
  1382
berghofe@19985
  1383
    val (rec_result_Ts', rec_fn_Ts') = DatatypeProp.make_primrec_Ts descr' sorts' used;
berghofe@19985
  1384
wenzelm@21365
  1385
    val rec_sort = if null dt_atomTs then HOLogic.typeS else
berghofe@19985
  1386
      let val names = map (Sign.base_name o fst o dest_Type) dt_atomTs
berghofe@19985
  1387
      in Sign.certify_sort thy10 (map (Sign.intern_class thy10)
berghofe@19985
  1388
        (map (fn s => "pt_" ^ s) names @
berghofe@19985
  1389
         List.concat (map (fn s => List.mapPartial (fn s' =>
berghofe@19985
  1390
           if s = s' then NONE
berghofe@19985
  1391
           else SOME ("cp_" ^ s ^ "_" ^ s')) names) names)))
berghofe@19985
  1392
      end;
berghofe@19985
  1393
berghofe@19985
  1394
    val rec_result_Ts = map (fn TFree (s, _) => TFree (s, rec_sort)) rec_result_Ts';
berghofe@19985
  1395
    val rec_fn_Ts = map (typ_subst_atomic (rec_result_Ts' ~~ rec_result_Ts)) rec_fn_Ts';
berghofe@19251
  1396
berghofe@21021
  1397
    val rec_set_Ts = map (fn (T1, T2) =>
berghofe@21021
  1398
      rec_fn_Ts @ [T1, T2] ---> HOLogic.boolT) (recTs ~~ rec_result_Ts);
berghofe@19251
  1399
berghofe@19322
  1400
    val big_rec_name = big_name ^ "_rec_set";
berghofe@21021
  1401
    val rec_set_names' =
berghofe@21021
  1402
      if length descr'' = 1 then [big_rec_name] else
berghofe@21021
  1403
        map ((curry (op ^) (big_rec_name ^ "_")) o string_of_int)
berghofe@21021
  1404
          (1 upto (length descr''));
wenzelm@22578
  1405
    val rec_set_names =  map (Sign.full_name thy10) rec_set_names';
berghofe@19251
  1406
berghofe@19322
  1407
    val rec_fns = map (uncurry (mk_Free "f"))
berghofe@19322
  1408
      (rec_fn_Ts ~~ (1 upto (length rec_fn_Ts)));
berghofe@21021
  1409
    val rec_sets' = map (fn c => list_comb (Free c, rec_fns))
berghofe@21021
  1410
      (rec_set_names' ~~ rec_set_Ts);
berghofe@19322
  1411
    val rec_sets = map (fn c => list_comb (Const c, rec_fns))
berghofe@19322
  1412
      (rec_set_names ~~ rec_set_Ts);
berghofe@19251
  1413
berghofe@19322
  1414
    (* introduction rules for graph of recursion function *)
berghofe@19251
  1415
berghofe@20145
  1416
    val rec_preds = map (fn (a, T) =>
berghofe@20145
  1417
      Free (a, T --> HOLogic.boolT)) (pnames ~~ rec_result_Ts);
berghofe@20145
  1418
berghofe@20267
  1419
    fun mk_fresh3 rs [] = []
berghofe@20267
  1420
      | mk_fresh3 rs ((p as (ys, z)) :: yss) = List.concat (map (fn y as (_, T) =>
berghofe@20267
  1421
            List.mapPartial (fn ((_, (_, x)), r as (_, U)) => if z = x then NONE
berghofe@20267
  1422
              else SOME (HOLogic.mk_Trueprop
berghofe@25823
  1423
                (fresh_const T U $ Free y $ Free r))) rs) ys) @
berghofe@20267
  1424
          mk_fresh3 rs yss;
berghofe@20267
  1425
berghofe@21088
  1426
    (* FIXME: avoid collisions with other variable names? *)
berghofe@21088
  1427
    val rec_ctxt = Free ("z", fsT');
berghofe@21088
  1428
berghofe@20397
  1429
    fun make_rec_intr T p rec_set ((rec_intr_ts, rec_prems, rec_prems',
berghofe@20397
  1430
          rec_eq_prems, l), ((cname, cargs), idxs)) =
berghofe@19251
  1431
      let
berghofe@19251
  1432
        val Ts = map (typ_of_dtyp descr'' sorts') cargs;
berghofe@19851
  1433
        val frees = map (fn i => "x" ^ string_of_int i) (1 upto length Ts) ~~ Ts;
berghofe@19851
  1434
        val frees' = partition_cargs idxs frees;
berghofe@21088
  1435
        val binders = List.concat (map fst frees');
berghofe@20411
  1436
        val atomTs = distinct op = (maps (map snd o fst) frees');
berghofe@19851
  1437
        val recs = List.mapPartial
berghofe@20145
  1438
          (fn ((_, DtRec i), p) => SOME (i, p) | _ => NONE)
berghofe@19851
  1439
          (partition_cargs idxs cargs ~~ frees');
berghofe@19851
  1440
        val frees'' = map (fn i => "y" ^ string_of_int i) (1 upto length recs) ~~
berghofe@19851
  1441
          map (fn (i, _) => List.nth (rec_result_Ts, i)) recs;
berghofe@20145
  1442
        val prems1 = map (fn ((i, (_, x)), y) => HOLogic.mk_Trueprop
berghofe@21021
  1443
          (List.nth (rec_sets', i) $ Free x $ Free y)) (recs ~~ frees'');
berghofe@20145
  1444
        val prems2 =
berghofe@20145
  1445
          map (fn f => map (fn p as (_, T) => HOLogic.mk_Trueprop
berghofe@25823
  1446
            (fresh_const T (fastype_of f) $ Free p $ f)) binders) rec_fns;
berghofe@21088
  1447
        val prems3 = mk_fresh1 [] binders @ mk_fresh2 [] frees';
berghofe@20145
  1448
        val prems4 = map (fn ((i, _), y) =>
berghofe@20145
  1449
          HOLogic.mk_Trueprop (List.nth (rec_preds, i) $ Free y)) (recs ~~ frees'');
berghofe@20267
  1450
        val prems5 = mk_fresh3 (recs ~~ frees'') frees';
berghofe@20411
  1451
        val prems6 = maps (fn aT => map (fn y as (_, T) => HOLogic.mk_Trueprop
berghofe@22274
  1452
          (Const ("Finite_Set.finite", HOLogic.mk_setT aT --> HOLogic.boolT) $
berghofe@22274
  1453
             (Const ("Nominal.supp", T --> HOLogic.mk_setT aT) $ Free y)))
berghofe@20411
  1454
               frees'') atomTs;
berghofe@21088
  1455
        val prems7 = map (fn x as (_, T) => HOLogic.mk_Trueprop
berghofe@25823
  1456
          (fresh_const T fsT' $ Free x $ rec_ctxt)) binders;
berghofe@20145
  1457
        val result = list_comb (List.nth (rec_fns, l), map Free (frees @ frees''));
berghofe@20376
  1458
        val result_freshs = map (fn p as (_, T) =>
berghofe@25823
  1459
          fresh_const T (fastype_of result) $ Free p $ result) binders;
berghofe@20145
  1460
        val P = HOLogic.mk_Trueprop (p $ result)
berghofe@20145
  1461
      in
berghofe@20145
  1462
        (rec_intr_ts @ [Logic.list_implies (List.concat prems2 @ prems3 @ prems1,
berghofe@21021
  1463
           HOLogic.mk_Trueprop (rec_set $
berghofe@21021
  1464
             list_comb (Const (cname, Ts ---> T), map Free frees) $ result))],
berghofe@20145
  1465
         rec_prems @ [list_all_free (frees @ frees'', Logic.list_implies (prems4, P))],
berghofe@21054
  1466
         rec_prems' @ map (fn fr => list_all_free (frees @ frees'',
berghofe@21088
  1467
           Logic.list_implies (List.nth (prems2, l) @ prems3 @ prems5 @ prems7 @ prems6 @ [P],
berghofe@21054
  1468
             HOLogic.mk_Trueprop fr))) result_freshs,
berghofe@20397
  1469
         rec_eq_prems @ [List.concat prems2 @ prems3],
berghofe@20145
  1470
         l + 1)
berghofe@19251
  1471
      end;
berghofe@19251
  1472
berghofe@20397
  1473
    val (rec_intr_ts, rec_prems, rec_prems', rec_eq_prems, _) =
berghofe@20145
  1474
      Library.foldl (fn (x, ((((d, d'), T), p), rec_set)) =>
berghofe@20145
  1475
        Library.foldl (make_rec_intr T p rec_set) (x, #3 (snd d) ~~ snd d'))
berghofe@21021
  1476
          (([], [], [], [], 0), descr'' ~~ ndescr ~~ recTs ~~ rec_preds ~~ rec_sets');
berghofe@19251
  1477
wenzelm@21365
  1478
    val ({intrs = rec_intrs, elims = rec_elims, raw_induct = rec_induct, ...}, thy11) =
berghofe@21055
  1479
      thy10 |>
wenzelm@26475
  1480
        InductivePackage.add_inductive_global (serial_string ())
wenzelm@26475
  1481
          {quiet_mode = ! quiet_mode, verbose = false, kind = Thm.internalK,
wenzelm@28083
  1482
           alt_name = Name.binding big_rec_name, coind = false, no_elim = false, no_ind = false,
berghofe@26536
  1483
           skip_mono = true}
wenzelm@28083
  1484
          (map (fn (s, T) => ((Name.binding s, T), NoSyn)) (rec_set_names' ~~ rec_set_Ts))
wenzelm@26128
  1485
          (map dest_Free rec_fns)
wenzelm@28084
  1486
          (map (fn x => (Attrib.no_binding, x)) rec_intr_ts) [] ||>
wenzelm@26663
  1487
      PureThy.hide_fact true (NameSpace.append (Sign.full_name thy10 big_rec_name) "induct");
berghofe@19251
  1488
berghofe@19985
  1489
    (** equivariance **)
berghofe@19985
  1490
wenzelm@26343
  1491
    val fresh_bij = PureThy.get_thms thy11 "fresh_bij";
wenzelm@26343
  1492
    val perm_bij = PureThy.get_thms thy11 "perm_bij";
berghofe@19985
  1493
berghofe@19985
  1494
    val (rec_equiv_thms, rec_equiv_thms') = ListPair.unzip (map (fn aT =>
berghofe@19985
  1495
      let
berghofe@19985
  1496
        val permT = mk_permT aT;
berghofe@19985
  1497
        val pi = Free ("pi", permT);
berghofe@22311
  1498
        val rec_fns_pi = map (mk_perm [] pi o uncurry (mk_Free "f"))
berghofe@19985
  1499
          (rec_fn_Ts ~~ (1 upto (length rec_fn_Ts)));
berghofe@19985
  1500
        val rec_sets_pi = map (fn c => list_comb (Const c, rec_fns_pi))
berghofe@19985
  1501
          (rec_set_names ~~ rec_set_Ts);
berghofe@19985
  1502
        val ps = map (fn ((((T, U), R), R'), i) =>
berghofe@19985
  1503
          let
berghofe@19985
  1504
            val x = Free ("x" ^ string_of_int i, T);
berghofe@19985
  1505
            val y = Free ("y" ^ string_of_int i, U)
berghofe@19985
  1506
          in
berghofe@22311
  1507
            (R $ x $ y, R' $ mk_perm [] pi x $ mk_perm [] pi y)
berghofe@19985
  1508
          end) (recTs ~~ rec_result_Ts ~~ rec_sets ~~ rec_sets_pi ~~ (1 upto length recTs));
berghofe@19985
  1509
        val ths = map (fn th => standard (th RS mp)) (split_conj_thm
wenzelm@20046
  1510
          (Goal.prove_global thy11 [] []
berghofe@19985
  1511
            (HOLogic.mk_Trueprop (foldr1 HOLogic.mk_conj (map HOLogic.mk_imp ps)))
berghofe@19985
  1512
            (fn _ => rtac rec_induct 1 THEN REPEAT
berghofe@27450
  1513
               (simp_tac (Simplifier.theory_context thy11 HOL_basic_ss
berghofe@27450
  1514
                  addsimps flat perm_simps'
berghofe@27450
  1515
                  addsimprocs [NominalPermeq.perm_simproc_app]) 1 THEN
berghofe@19985
  1516
                (resolve_tac rec_intrs THEN_ALL_NEW
berghofe@19985
  1517
                 asm_simp_tac (HOL_ss addsimps (fresh_bij @ perm_bij))) 1))))
wenzelm@20046
  1518
        val ths' = map (fn ((P, Q), th) =>
wenzelm@20046
  1519
          Goal.prove_global thy11 [] []
berghofe@19985
  1520
            (Logic.mk_implies (HOLogic.mk_Trueprop Q, HOLogic.mk_Trueprop P))
berghofe@19985
  1521
            (fn _ => dtac (Thm.instantiate ([],
berghofe@19985
  1522
                 [(cterm_of thy11 (Var (("pi", 0), permT)),
berghofe@19985
  1523
                   cterm_of thy11 (Const ("List.rev", permT --> permT) $ pi))]) th) 1 THEN
wenzelm@20046
  1524
               NominalPermeq.perm_simp_tac HOL_ss 1)) (ps ~~ ths)
berghofe@19985
  1525
      in (ths, ths') end) dt_atomTs);
berghofe@19985
  1526
berghofe@19985
  1527
    (** finite support **)
berghofe@19985
  1528
berghofe@19985
  1529
    val rec_fin_supp_thms = map (fn aT =>
berghofe@19985
  1530
      let
berghofe@19985
  1531
        val name = Sign.base_name (fst (dest_Type aT));
wenzelm@26343
  1532
        val fs_name = PureThy.get_thm thy11 ("fs_" ^ name ^ "1");
berghofe@19985
  1533
        val aset = HOLogic.mk_setT aT;
berghofe@22274
  1534
        val finite = Const ("Finite_Set.finite", aset --> HOLogic.boolT);
berghofe@22274
  1535
        val fins = map (fn (f, T) => HOLogic.mk_Trueprop
berghofe@22274
  1536
          (finite $ (Const ("Nominal.supp", T --> aset) $ f)))
berghofe@19985
  1537
            (rec_fns ~~ rec_fn_Ts)
berghofe@19985
  1538
      in
berghofe@19985
  1539
        map (fn th => standard (th RS mp)) (split_conj_thm
wenzelm@20046
  1540
          (Goal.prove_global thy11 [] fins
berghofe@19985
  1541
            (HOLogic.mk_Trueprop (foldr1 HOLogic.mk_conj
berghofe@19985
  1542
              (map (fn (((T, U), R), i) =>
berghofe@19985
  1543
                 let
berghofe@19985
  1544
                   val x = Free ("x" ^ string_of_int i, T);
berghofe@19985
  1545
                   val y = Free ("y" ^ string_of_int i, U)
berghofe@19985
  1546
                 in
berghofe@21021
  1547
                   HOLogic.mk_imp (R $ x $ y,
berghofe@22274
  1548
                     finite $ (Const ("Nominal.supp", U --> aset) $ y))
berghofe@19985
  1549
                 end) (recTs ~~ rec_result_Ts ~~ rec_sets ~~ (1 upto length recTs)))))
wenzelm@26711
  1550
            (fn {prems = fins, ...} =>
wenzelm@26711
  1551
              (rtac rec_induct THEN_ALL_NEW cut_facts_tac fins) 1 THEN REPEAT
berghofe@19985
  1552
               (NominalPermeq.finite_guess_tac (HOL_ss addsimps [fs_name]) 1))))
berghofe@19985
  1553
      end) dt_atomTs;
berghofe@19985
  1554
berghofe@20376
  1555
    (** freshness **)
berghofe@20376
  1556
berghofe@20376
  1557
    val finite_premss = map (fn aT =>
berghofe@22274
  1558
      map (fn (f, T) => HOLogic.mk_Trueprop
berghofe@22274
  1559
        (Const ("Finite_Set.finite", HOLogic.mk_setT aT --> HOLogic.boolT) $
berghofe@22274
  1560
           (Const ("Nominal.supp", T --> HOLogic.mk_setT aT) $ f)))
berghofe@20376
  1561
           (rec_fns ~~ rec_fn_Ts)) dt_atomTs;
berghofe@20376
  1562
berghofe@20376
  1563
    val rec_fresh_thms = map (fn ((aT, eqvt_ths), finite_prems) =>
berghofe@20376
  1564
      let
berghofe@20376
  1565
        val name = Sign.base_name (fst (dest_Type aT));
wenzelm@26343
  1566
        val fs_name = PureThy.get_thm thy11 ("fs_" ^ name ^ "1");
berghofe@20376
  1567
        val a = Free ("a", aT);
berghofe@20376
  1568
        val freshs = map (fn (f, fT) => HOLogic.mk_Trueprop
berghofe@25823
  1569
          (fresh_const aT fT $ a $ f)) (rec_fns ~~ rec_fn_Ts)
berghofe@20376
  1570
      in
berghofe@20376
  1571
        map (fn (((T, U), R), eqvt_th) =>
berghofe@20376
  1572
          let
berghofe@20376
  1573
            val x = Free ("x", T);
berghofe@20376
  1574
            val y = Free ("y", U);
berghofe@20376
  1575
            val y' = Free ("y'", U)
berghofe@20376
  1576
          in
wenzelm@21516
  1577
            standard (Goal.prove (ProofContext.init thy11) [] (finite_prems @
berghofe@21021
  1578
                [HOLogic.mk_Trueprop (R $ x $ y),
berghofe@20376
  1579
                 HOLogic.mk_Trueprop (HOLogic.mk_all ("y'", U,
berghofe@21021
  1580
                   HOLogic.mk_imp (R $ x $ y', HOLogic.mk_eq (y', y)))),
berghofe@25823
  1581
                 HOLogic.mk_Trueprop (fresh_const aT T $ a $ x)] @
berghofe@20376
  1582
              freshs)
berghofe@25823
  1583
              (HOLogic.mk_Trueprop (fresh_const aT U $ a $ y))
berghofe@20376
  1584
              (fn {prems, context} =>
berghofe@20376
  1585
                 let
berghofe@20376
  1586
                   val (finite_prems, rec_prem :: unique_prem ::
berghofe@20376
  1587
                     fresh_prems) = chop (length finite_prems) prems;
berghofe@20376
  1588
                   val unique_prem' = unique_prem RS spec RS mp;
berghofe@20376
  1589
                   val unique = [unique_prem', unique_prem' RS sym] MRS trans;
berghofe@20376
  1590
                   val _ $ (_ $ (_ $ S $ _)) $ _ = prop_of supports_fresh;
berghofe@20376
  1591
                   val tuple = foldr1 HOLogic.mk_prod (x :: rec_fns)
berghofe@20376
  1592
                 in EVERY
berghofe@20376
  1593
                   [rtac (Drule.cterm_instantiate
berghofe@20376
  1594
                      [(cterm_of thy11 S,
berghofe@20376
  1595
                        cterm_of thy11 (Const ("Nominal.supp",
berghofe@20376
  1596
                          fastype_of tuple --> HOLogic.mk_setT aT) $ tuple))]
berghofe@20376
  1597
                      supports_fresh) 1,
berghofe@20376
  1598
                    simp_tac (HOL_basic_ss addsimps
berghofe@20376
  1599
                      [supports_def, symmetric fresh_def, fresh_prod]) 1,
berghofe@20376
  1600
                    REPEAT_DETERM (resolve_tac [allI, impI] 1),
berghofe@20376
  1601
                    REPEAT_DETERM (etac conjE 1),
berghofe@20376
  1602
                    rtac unique 1,
berghofe@20376
  1603
                    SUBPROOF (fn {prems = prems', params = [a, b], ...} => EVERY
berghofe@20376
  1604
                      [cut_facts_tac [rec_prem] 1,
berghofe@20376
  1605
                       rtac (Thm.instantiate ([],
berghofe@20376
  1606
                         [(cterm_of thy11 (Var (("pi", 0), mk_permT aT)),
berghofe@20376
  1607
                           cterm_of thy11 (perm_of_pair (term_of a, term_of b)))]) eqvt_th) 1,
berghofe@20376
  1608
                       asm_simp_tac (HOL_ss addsimps
berghofe@20376
  1609
                         (prems' @ perm_swap @ perm_fresh_fresh)) 1]) context 1,
berghofe@20376
  1610
                    rtac rec_prem 1,
berghofe@20376
  1611
                    simp_tac (HOL_ss addsimps (fs_name ::
berghofe@20376
  1612
                      supp_prod :: finite_Un :: finite_prems)) 1,
berghofe@20376
  1613
                    simp_tac (HOL_ss addsimps (symmetric fresh_def ::
berghofe@20376
  1614
                      fresh_prod :: fresh_prems)) 1]
berghofe@20376
  1615
                 end))
berghofe@20376
  1616
          end) (recTs ~~ rec_result_Ts ~~ rec_sets ~~ eqvt_ths)
berghofe@20376
  1617
      end) (dt_atomTs ~~ rec_equiv_thms' ~~ finite_premss);
berghofe@20376
  1618
berghofe@20376
  1619
    (** uniqueness **)
berghofe@20376
  1620
berghofe@21088
  1621
    val fun_tuple = foldr1 HOLogic.mk_prod (rec_ctxt :: rec_fns);
berghofe@20145
  1622
    val fun_tupleT = fastype_of fun_tuple;
berghofe@20145
  1623
    val rec_unique_frees =
berghofe@20145
  1624
      DatatypeProp.indexify_names (replicate (length recTs) "x") ~~ recTs;
berghofe@20397
  1625
    val rec_unique_frees'' = map (fn (s, T) => (s ^ "'", T)) rec_unique_frees;
berghofe@20267
  1626
    val rec_unique_frees' =
berghofe@20267
  1627
      DatatypeProp.indexify_names (replicate (length recTs) "y") ~~ rec_result_Ts;
berghofe@21021
  1628
    val rec_unique_concls = map (fn ((x, U), R) =>
berghofe@20145
  1629
        Const ("Ex1", (U --> HOLogic.boolT) --> HOLogic.boolT) $
berghofe@21021
  1630
          Abs ("y", U, R $ Free x $ Bound 0))
berghofe@20145
  1631
      (rec_unique_frees ~~ rec_result_Ts ~~ rec_sets);
berghofe@20376
  1632
berghofe@20145
  1633
    val induct_aux_rec = Drule.cterm_instantiate
berghofe@20145
  1634
      (map (pairself (cterm_of thy11))
berghofe@20145
  1635
         (map (fn (aT, f) => (Logic.varify f, Abs ("z", HOLogic.unitT,
berghofe@20145
  1636
            Const ("Nominal.supp", fun_tupleT --> HOLogic.mk_setT aT) $ fun_tuple)))
berghofe@20145
  1637
              fresh_fs @
berghofe@20145
  1638
          map (fn (((P, T), (x, U)), Q) =>
berghofe@26067
  1639
           (Var ((P, 0), Logic.varifyT (fsT' --> T --> HOLogic.boolT)),
berghofe@20145
  1640
            Abs ("z", HOLogic.unitT, absfree (x, U, Q))))
berghofe@20145
  1641
              (pnames ~~ recTs ~~ rec_unique_frees ~~ rec_unique_concls) @
berghofe@20145
  1642
          map (fn (s, T) => (Var ((s, 0), Logic.varifyT T), Free (s, T)))
berghofe@20145
  1643
            rec_unique_frees)) induct_aux;
berghofe@20145
  1644
berghofe@20376
  1645
    fun obtain_fresh_name vs ths rec_fin_supp T (freshs1, freshs2, ctxt) =
berghofe@20376
  1646
      let
berghofe@20376
  1647
        val p = foldr1 HOLogic.mk_prod (vs @ freshs1);
berghofe@20376
  1648
        val ex = Goal.prove ctxt [] [] (HOLogic.mk_Trueprop
berghofe@20376
  1649
            (HOLogic.exists_const T $ Abs ("x", T,
berghofe@25823
  1650
              fresh_const T (fastype_of p) $ Bound 0 $ p)))
berghofe@20376
  1651
          (fn _ => EVERY
berghofe@20376
  1652
            [cut_facts_tac ths 1,
berghofe@20376
  1653
             REPEAT_DETERM (dresolve_tac (the (AList.lookup op = rec_fin_supp T)) 1),
urbanc@21377
  1654
             resolve_tac exists_fresh' 1,
berghofe@20376
  1655
             asm_simp_tac (HOL_ss addsimps (supp_prod :: finite_Un :: fs_atoms)) 1]);
berghofe@20376
  1656
        val (([cx], ths), ctxt') = Obtain.result
berghofe@20376
  1657
          (fn _ => EVERY
berghofe@20376
  1658
            [etac exE 1,
berghofe@20376
  1659
             full_simp_tac (HOL_ss addsimps (fresh_prod :: fresh_atm)) 1,
berghofe@20376
  1660
             REPEAT (etac conjE 1)])
berghofe@20376
  1661
          [ex] ctxt
berghofe@20376
  1662
      in (freshs1 @ [term_of cx], freshs2 @ ths, ctxt') end;
berghofe@20376
  1663
berghofe@21088
  1664
    val finite_ctxt_prems = map (fn aT =>
berghofe@22274
  1665
      HOLogic.mk_Trueprop
berghofe@22274
  1666
        (Const ("Finite_Set.finite", HOLogic.mk_setT aT --> HOLogic.boolT) $
berghofe@22274
  1667
           (Const ("Nominal.supp", fsT' --> HOLogic.mk_setT aT) $ rec_ctxt))) dt_atomTs;
berghofe@21088
  1668
berghofe@20397
  1669
    val rec_unique_thms = split_conj_thm (Goal.prove
wenzelm@21516
  1670
      (ProofContext.init thy11) (map fst rec_unique_frees)
berghofe@21088
  1671
      (List.concat finite_premss @ finite_ctxt_prems @ rec_prems @ rec_prems')
berghofe@20145
  1672
      (HOLogic.mk_Trueprop (foldr1 HOLogic.mk_conj rec_unique_concls))
berghofe@20376
  1673
      (fn {prems, context} =>
berghofe@20267
  1674
         let
berghofe@20267
  1675
           val k = length rec_fns;
berghofe@20376
  1676
           val (finite_thss, ths1) = fold_map (fn T => fn xs =>
berghofe@20376
  1677
             apfst (pair T) (chop k xs)) dt_atomTs prems;
berghofe@21088
  1678
           val (finite_ctxt_ths, ths2) = chop (length dt_atomTs) ths1;
berghofe@21088
  1679
           val (P_ind_ths, fcbs) = chop k ths2;
berghofe@20267
  1680
           val P_ths = map (fn th => th RS mp) (split_conj_thm
berghofe@20376
  1681
             (Goal.prove context
berghofe@20397
  1682
               (map fst (rec_unique_frees'' @ rec_unique_frees')) []
berghofe@20267
  1683
               (HOLogic.mk_Trueprop (foldr1 HOLogic.mk_conj
berghofe@21021
  1684
                  (map (fn (((x, y), S), P) => HOLogic.mk_imp
berghofe@21021
  1685
                    (S $ Free x $ Free y, P $ (Free y)))
berghofe@20397
  1686
                      (rec_unique_frees'' ~~ rec_unique_frees' ~~ rec_sets ~~ rec_preds))))
berghofe@20267
  1687
               (fn _ =>
berghofe@20267
  1688
                  rtac rec_induct 1 THEN
berghofe@20376
  1689
                  REPEAT ((resolve_tac P_ind_ths THEN_ALL_NEW assume_tac) 1))));
berghofe@20376
  1690
           val rec_fin_supp_thms' = map
berghofe@20376
  1691
             (fn (ths, (T, fin_ths)) => (T, map (curry op MRS fin_ths) ths))
berghofe@20376
  1692
             (rec_fin_supp_thms ~~ finite_thss);
berghofe@20267
  1693
         in EVERY
berghofe@20267
  1694
           ([rtac induct_aux_rec 1] @
berghofe@21088
  1695
            maps (fn ((_, finite_ths), finite_th) =>
berghofe@21088
  1696
              [cut_facts_tac (finite_th :: finite_ths) 1,
berghofe@21088
  1697
               asm_simp_tac (HOL_ss addsimps [supp_prod, finite_Un]) 1])
berghofe@21088
  1698
                (finite_thss ~~ finite_ctxt_ths) @
berghofe@20397
  1699
            maps (fn ((_, idxss), elim) => maps (fn idxs =>
berghofe@20397
  1700
              [full_simp_tac (HOL_ss addsimps [symmetric fresh_def, supp_prod, Un_iff]) 1,
berghofe@20397
  1701
               REPEAT_DETERM (eresolve_tac [conjE, ex1E] 1),
berghofe@20397
  1702
               rtac ex1I 1,
berghofe@20397
  1703
               (resolve_tac rec_intrs THEN_ALL_NEW atac) 1,
berghofe@20397
  1704
               rotate_tac ~1 1,
berghofe@20397
  1705
               ((DETERM o etac elim) THEN_ALL_NEW full_simp_tac
berghofe@21021
  1706
                  (HOL_ss addsimps List.concat distinct_thms)) 1] @
berghofe@21021
  1707
               (if null idxs then [] else [hyp_subst_tac 1,
berghofe@20397
  1708
                SUBPROOF (fn {asms, concl, prems = prems', params, context = context', ...} =>
berghofe@20376
  1709
                  let
berghofe@21021
  1710
                    val SOME prem = find_first (can (HOLogic.dest_eq o
berghofe@21021
  1711
                      HOLogic.dest_Trueprop o prop_of)) prems';
berghofe@20376
  1712
                    val _ $ (_ $ lhs $ rhs) = prop_of prem;
berghofe@20376
  1713
                    val _ $ (_ $ lhs' $ rhs') = term_of concl;
berghofe@20376
  1714
                    val rT = fastype_of lhs';
berghofe@20376
  1715
                    val (c, cargsl) = strip_comb lhs;
berghofe@20376
  1716
                    val cargsl' = partition_cargs idxs cargsl;
berghofe@20376
  1717
                    val boundsl = List.concat (map fst cargsl');
berghofe@20376
  1718
                    val (_, cargsr) = strip_comb rhs;
berghofe@20376
  1719
                    val cargsr' = partition_cargs idxs cargsr;
berghofe@20376
  1720
                    val boundsr = List.concat (map fst cargsr');
berghofe@20376
  1721
                    val (params1, _ :: params2) =
berghofe@20376
  1722
                      chop (length params div 2) (map term_of params);
berghofe@20376
  1723
                    val params' = params1 @ params2;
berghofe@20376
  1724
                    val rec_prems = filter (fn th => case prop_of th of
berghofe@21021
  1725
                      _ $ (S $ _ $ _) => S mem rec_sets | _ => false) prems';
berghofe@20376
  1726
                    val fresh_prems = filter (fn th => case prop_of th of
berghofe@20376
  1727
                        _ $ (Const ("Nominal.fresh", _) $ _ $ _) => true
berghofe@20376
  1728
                      | _ $ (Const ("Not", _) $ _) => true
berghofe@20376
  1729
                      | _ => false) prems';
berghofe@20376
  1730
                    val Ts = map fastype_of boundsl;
berghofe@20376
  1731
berghofe@20376
  1732
                    val _ = warning "step 1: obtaining fresh names";
berghofe@20376
  1733
                    val (freshs1, freshs2, context'') = fold
berghofe@21088
  1734
                      (obtain_fresh_name (rec_ctxt :: rec_fns @ params')
berghofe@21088
  1735
                         (List.concat (map snd finite_thss) @
berghofe@21088
  1736
                            finite_ctxt_ths @ rec_prems)
berghofe@20376
  1737
                         rec_fin_supp_thms')
berghofe@20376
  1738
                      Ts ([], [], context');
berghofe@20376
  1739
                    val pi1 = map perm_of_pair (boundsl ~~ freshs1);
berghofe@20376
  1740
                    val rpi1 = rev pi1;
berghofe@20376
  1741
                    val pi2 = map perm_of_pair (boundsr ~~ freshs1);
berghofe@21073
  1742
                    val rpi2 = rev pi2;
berghofe@20376
  1743
berghofe@20376
  1744
                    val fresh_prems' = mk_not_sym fresh_prems;
berghofe@20376
  1745
                    val freshs2' = mk_not_sym freshs2;
berghofe@20376
  1746
berghofe@20376
  1747
                    (** as, bs, cs # K as ts, K bs us **)
berghofe@20376
  1748
                    val _ = warning "step 2: as, bs, cs # K as ts, K bs us";
berghofe@20376
  1749
                    val prove_fresh_ss = HOL_ss addsimps
berghofe@20376
  1750
                      (finite_Diff :: List.concat fresh_thms @
berghofe@20376
  1751
                       fs_atoms @ abs_fresh @ abs_supp @ fresh_atm);
berghofe@20376
  1752
                    (* FIXME: avoid asm_full_simp_tac ? *)
berghofe@20376
  1753
                    fun prove_fresh ths y x = Goal.prove context'' [] []
berghofe@25823
  1754
                      (HOLogic.mk_Trueprop (fresh_const
berghofe@25823
  1755
                         (fastype_of x) (fastype_of y) $ x $ y))
berghofe@20376
  1756
                      (fn _ => cut_facts_tac ths 1 THEN asm_full_simp_tac prove_fresh_ss 1);
berghofe@20376
  1757
                    val constr_fresh_thms =
berghofe@20376
  1758
                      map (prove_fresh fresh_prems lhs) boundsl @
berghofe@20376
  1759
                      map (prove_fresh fresh_prems rhs) boundsr @
berghofe@20376
  1760
                      map (prove_fresh freshs2 lhs) freshs1 @
berghofe@20376
  1761
                      map (prove_fresh freshs2 rhs) freshs1;
berghofe@20376
  1762
berghofe@20376
  1763
                    (** pi1 o (K as ts) = pi2 o (K bs us) **)
berghofe@20376
  1764
                    val _ = warning "step 3: pi1 o (K as ts) = pi2 o (K bs us)";
berghofe@20376
  1765
                    val pi1_pi2_eq = Goal.prove context'' [] []
berghofe@20376
  1766
                      (HOLogic.mk_Trueprop (HOLogic.mk_eq
berghofe@22311
  1767
                        (fold_rev (mk_perm []) pi1 lhs, fold_rev (mk_perm []) pi2 rhs)))
berghofe@20376
  1768
                      (fn _ => EVERY
berghofe@20376
  1769
                         [cut_facts_tac constr_fresh_thms 1,
berghofe@20376
  1770
                          asm_simp_tac (HOL_basic_ss addsimps perm_fresh_fresh) 1,
berghofe@20376
  1771
                          rtac prem 1]);
berghofe@20376
  1772
berghofe@20376
  1773
                    (** pi1 o ts = pi2 o us **)
berghofe@20376
  1774
                    val _ = warning "step 4: pi1 o ts = pi2 o us";
berghofe@20376
  1775
                    val pi1_pi2_eqs = map (fn (t, u) =>
berghofe@20376
  1776
                      Goal.prove context'' [] []
berghofe@20376
  1777
                        (HOLogic.mk_Trueprop (HOLogic.mk_eq
berghofe@22311
  1778
                          (fold_rev (mk_perm []) pi1 t, fold_rev (mk_perm []) pi2 u)))
berghofe@20376
  1779
                        (fn _ => EVERY
berghofe@20376
  1780
                           [cut_facts_tac [pi1_pi2_eq] 1,
berghofe@20376
  1781
                            asm_full_simp_tac (HOL_ss addsimps
berghofe@20376
  1782
                              (calc_atm @ List.concat perm_simps' @
berghofe@20376
  1783
                               fresh_prems' @ freshs2' @ abs_perm @
berghofe@20376
  1784
                               alpha @ List.concat inject_thms)) 1]))
berghofe@20376
  1785
                        (map snd cargsl' ~~ map snd cargsr');
berghofe@20376
  1786
berghofe@20376
  1787
                    (** pi1^-1 o pi2 o us = ts **)
berghofe@20376
  1788
                    val _ = warning "step 5: pi1^-1 o pi2 o us = ts";
berghofe@20376
  1789
                    val rpi1_pi2_eqs = map (fn ((t, u), eq) =>
berghofe@20376
  1790
                      Goal.prove context'' [] []
berghofe@20376
  1791
                        (HOLogic.mk_Trueprop (HOLogic.mk_eq
berghofe@22311
  1792
                          (fold_rev (mk_perm []) (rpi1 @ pi2) u, t)))
berghofe@20376
  1793
                        (fn _ => simp_tac (HOL_ss addsimps
berghofe@20376
  1794
                           ((eq RS sym) :: perm_swap)) 1))
berghofe@20376
  1795
                        (map snd cargsl' ~~ map snd cargsr' ~~ pi1_pi2_eqs);
berghofe@20376
  1796
berghofe@20376
  1797
                    val (rec_prems1, rec_prems2) =
berghofe@20376
  1798
                      chop (length rec_prems div 2) rec_prems;
berghofe@20376
  1799
berghofe@20376
  1800
                    (** (ts, pi1^-1 o pi2 o vs) in rec_set **)
berghofe@20376
  1801
                    val _ = warning "step 6: (ts, pi1^-1 o pi2 o vs) in rec_set";
berghofe@20376
  1802
                    val rec_prems' = map (fn th =>
berghofe@20376
  1803
                      let
berghofe@21021
  1804
                        val _ $ (S $ x $ y) = prop_of th;
berghofe@20376
  1805
                        val k = find_index (equal S) rec_sets;
berghofe@20376
  1806
                        val pi = rpi1 @ pi2;
berghofe@22311
  1807
                        fun mk_pi z = fold_rev (mk_perm []) pi z;
berghofe@20376
  1808
                        fun eqvt_tac p =
berghofe@20376
  1809
                          let
berghofe@20376
  1810
                            val U as Type (_, [Type (_, [T, _])]) = fastype_of p;
berghofe@20376
  1811
                            val l = find_index (equal T) dt_atomTs;
berghofe@20376
  1812
                            val th = List.nth (List.nth (rec_equiv_thms', l), k);
berghofe@20376
  1813
                            val th' = Thm.instantiate ([],
berghofe@20376
  1814
                              [(cterm_of thy11 (Var (("pi", 0), U)),
berghofe@20376
  1815
                                cterm_of thy11 p)]) th;
berghofe@20376
  1816
                          in rtac th' 1 end;
berghofe@20376
  1817
                        val th' = Goal.prove context'' [] []
berghofe@21021
  1818
                          (HOLogic.mk_Trueprop (S $ mk_pi x $ mk_pi y))
berghofe@20376
  1819
                          (fn _ => EVERY
berghofe@20376
  1820
                             (map eqvt_tac pi @
berghofe@20376
  1821
                              [simp_tac (HOL_ss addsimps (fresh_prems' @ freshs2' @
berghofe@20376
  1822
                                 perm_swap @ perm_fresh_fresh)) 1,
berghofe@20376
  1823
                               rtac th 1]))
berghofe@20376
  1824
                      in
berghofe@20376
  1825
                        Simplifier.simplify
berghofe@20376
  1826
                          (HOL_basic_ss addsimps rpi1_pi2_eqs) th'
berghofe@20376
  1827
                      end) rec_prems2;
berghofe@20376
  1828
berghofe@20376
  1829
                    val ihs = filter (fn th => case prop_of th of
berghofe@20376
  1830
                      _ $ (Const ("All", _) $ _) => true | _ => false) prems';
berghofe@20376
  1831
berghofe@21073
  1832
                    (** pi1 o rs = pi2 o vs , rs = pi1^-1 o pi2 o vs **)
berghofe@21073
  1833
                    val _ = warning "step 7: pi1 o rs = pi2 o vs , rs = pi1^-1 o pi2 o vs";
berghofe@21073
  1834
                    val rec_eqns = map (fn (th, ih) =>
berghofe@20376
  1835
                      let
berghofe@20376
  1836
                        val th' = th RS (ih RS spec RS mp) RS sym;
berghofe@20376
  1837
                        val _ $ (_ $ lhs $ rhs) = prop_of th';
berghofe@20376
  1838
                        fun strip_perm (_ $ _ $ t) = strip_perm t
berghofe@20376
  1839
                          | strip_perm t = t;
berghofe@20376
  1840
                      in
berghofe@21073
  1841
                        Goal.prove context'' [] []
berghofe@20376
  1842
                           (HOLogic.mk_Trueprop (HOLogic.mk_eq
berghofe@22311
  1843
                              (fold_rev (mk_perm []) pi1 lhs,
berghofe@22311
  1844
                               fold_rev (mk_perm []) pi2 (strip_perm rhs))))
berghofe@20376
  1845
                           (fn _ => simp_tac (HOL_basic_ss addsimps
berghofe@21073
  1846
                              (th' :: perm_swap)) 1)
berghofe@21073
  1847
                      end) (rec_prems' ~~ ihs);
berghofe@20376
  1848
berghofe@21073
  1849
                    (** as # rs **)
berghofe@21073
  1850
                    val _ = warning "step 8: as # rs";
berghofe@21073
  1851
                    val rec_freshs = List.concat
berghofe@21073
  1852
                      (map (fn (rec_prem, ih) =>
berghofe@20376
  1853
                        let
berghofe@21021
  1854
                          val _ $ (S $ x $ (y as Free (_, T))) =
berghofe@20376
  1855
                            prop_of rec_prem;
berghofe@20376
  1856
                          val k = find_index (equal S) rec_sets;
berghofe@21073
  1857
                          val atoms = List.concat (List.mapPartial (fn (bs, z) =>
berghofe@21073
  1858
                            if z = x then NONE else SOME bs) cargsl')
berghofe@20376
  1859
                        in
berghofe@21073
  1860
                          map (fn a as Free (_, aT) =>
berghofe@21073
  1861
                            let val l = find_index (equal aT) dt_atomTs;
berghofe@21073
  1862
                            in
berghofe@21073
  1863
                              Goal.prove context'' [] []
berghofe@25823
  1864
                                (HOLogic.mk_Trueprop (fresh_const aT T $ a $ y))
berghofe@20376
  1865
                                (fn _ => EVERY
berghofe@20376
  1866
                                   (rtac (List.nth (List.nth (rec_fresh_thms, l), k)) 1 ::
berghofe@20376
  1867
                                    map (fn th => rtac th 1)
berghofe@20376
  1868
                                      (snd (List.nth (finite_thss, l))) @
berghofe@20376
  1869
                                    [rtac rec_prem 1, rtac ih 1,
berghofe@21073
  1870
                                     REPEAT_DETERM (resolve_tac fresh_prems 1)]))
berghofe@21073
  1871
                            end) atoms
berghofe@21073
  1872
                        end) (rec_prems1 ~~ ihs));
berghofe@20376
  1873
berghofe@20376
  1874
                    (** as # fK as ts rs , bs # fK bs us vs **)
berghofe@20376
  1875
                    val _ = warning "step 9: as # fK as ts rs , bs # fK bs us vs";
berghofe@21073
  1876
                    fun prove_fresh_result (a as Free (_, aT)) =
berghofe@20376
  1877
                      Goal.prove context'' [] []
berghofe@25823
  1878
                        (HOLogic.mk_Trueprop (fresh_const aT rT $ a $ rhs'))
berghofe@20376
  1879
                        (fn _ => EVERY
berghofe@20376
  1880
                           [resolve_tac fcbs 1,
berghofe@20376
  1881
                            REPEAT_DETERM (resolve_tac
berghofe@21073
  1882
                              (fresh_prems @ rec_freshs) 1),
berghofe@20411
  1883
                            REPEAT_DETERM (resolve_tac (maps snd rec_fin_supp_thms') 1
berghofe@20411
  1884
                              THEN resolve_tac rec_prems 1),
berghofe@20376
  1885
                            resolve_tac P_ind_ths 1,
berghofe@20376
  1886
                            REPEAT_DETERM (resolve_tac (P_ths @ rec_prems) 1)]);
wenzelm@21365
  1887
berghofe@21073
  1888
                    val fresh_results'' = map prove_fresh_result boundsl;
berghofe@21073
  1889
berghofe@21073
  1890
                    fun prove_fresh_result'' ((a as Free (_, aT), b), th) =
berghofe@21073
  1891
                      let val th' = Goal.prove context'' [] []
berghofe@25823
  1892
                        (HOLogic.mk_Trueprop (fresh_const aT rT $
berghofe@22311
  1893
                            fold_rev (mk_perm []) (rpi2 @ pi1) a $
berghofe@22311
  1894
                            fold_rev (mk_perm []) (rpi2 @ pi1) rhs'))
berghofe@21073
  1895
                        (fn _ => simp_tac (HOL_ss addsimps fresh_bij) 1 THEN
berghofe@21073
  1896
                           rtac th 1)
berghofe@21073
  1897
                      in
berghofe@21073
  1898
                        Goal.prove context'' [] []
berghofe@25823
  1899
                          (HOLogic.mk_Trueprop (fresh_const aT rT $ b $ lhs'))
berghofe@21073
  1900
                          (fn _ => EVERY
berghofe@21073
  1901
                             [cut_facts_tac [th'] 1,
berghofe@25998
  1902
                              full_simp_tac (Simplifier.theory_context thy11 HOL_ss
berghofe@25998
  1903
                                addsimps rec_eqns @ pi1_pi2_eqs @ perm_swap
berghofe@25998
  1904
                                addsimprocs [NominalPermeq.perm_simproc_app]) 1,
berghofe@21073
  1905
                              full_simp_tac (HOL_ss addsimps (calc_atm @
berghofe@21073
  1906
                                fresh_prems' @ freshs2' @ perm_fresh_fresh)) 1])
berghofe@21073
  1907
                      end;
berghofe@21073
  1908
berghofe@21073
  1909
                    val fresh_results = fresh_results'' @ map prove_fresh_result''
berghofe@21073
  1910
                      (boundsl ~~ boundsr ~~ fresh_results'');
berghofe@20376
  1911
berghofe@20376
  1912
                    (** cs # fK as ts rs , cs # fK bs us vs **)
berghofe@20376
  1913
                    val _ = warning "step 10: cs # fK as ts rs , cs # fK bs us vs";
berghofe@20376
  1914
                    fun prove_fresh_result' recs t (a as Free (_, aT)) =
berghofe@20376
  1915
                      Goal.prove context'' [] []
berghofe@25823
  1916
                        (HOLogic.mk_Trueprop (fresh_const aT rT $ a $ t))
berghofe@20376
  1917
                        (fn _ => EVERY
berghofe@20376
  1918
                          [cut_facts_tac recs 1,
berghofe@20376
  1919
                           REPEAT_DETERM (dresolve_tac
berghofe@20376
  1920
                             (the (AList.lookup op = rec_fin_supp_thms' aT)) 1),
berghofe@20376
  1921
                           NominalPermeq.fresh_guess_tac
berghofe@20376
  1922
                             (HOL_ss addsimps (freshs2 @
berghofe@20376
  1923
                                fs_atoms @ fresh_atm @
berghofe@20376
  1924
                                List.concat (map snd finite_thss))) 1]);
berghofe@20376
  1925
berghofe@20376
  1926
                    val fresh_results' =
berghofe@20376
  1927
                      map (prove_fresh_result' rec_prems1 rhs') freshs1 @
berghofe@20376
  1928
                      map (prove_fresh_result' rec_prems2 lhs') freshs1;
berghofe@20376
  1929
berghofe@20376
  1930
                    (** pi1 o (fK as ts rs) = pi2 o (fK bs us vs) **)
berghofe@20376
  1931
                    val _ = warning "step 11: pi1 o (fK as ts rs) = pi2 o (fK bs us vs)";
berghofe@20376
  1932
                    val pi1_pi2_result = Goal.prove context'' [] []
berghofe@20376
  1933
                      (HOLogic.mk_Trueprop (HOLogic.mk_eq
berghofe@22311
  1934
                        (fold_rev (mk_perm []) pi1 rhs', fold_rev (mk_perm []) pi2 lhs')))
berghofe@27450
  1935
                      (fn _ => simp_tac (Simplifier.context context'' HOL_ss
berghofe@27450
  1936
                           addsimps pi1_pi2_eqs @ rec_eqns
berghofe@27450
  1937
                           addsimprocs [NominalPermeq.perm_simproc_app]) 1 THEN
berghofe@20376
  1938
                         TRY (simp_tac (HOL_ss addsimps
berghofe@20376
  1939
                           (fresh_prems' @ freshs2' @ calc_atm @ perm_fresh_fresh)) 1));
berghofe@20376
  1940
berghofe@20376
  1941
                    val _ = warning "final result";
berghofe@20376
  1942
                    val final = Goal.prove context'' [] [] (term_of concl)
berghofe@20376
  1943
                      (fn _ => cut_facts_tac [pi1_pi2_result RS sym] 1 THEN
berghofe@20376
  1944
                        full_simp_tac (HOL_basic_ss addsimps perm_fresh_fresh @
berghofe@20376
  1945
                          fresh_results @ fresh_results') 1);
berghofe@20376
  1946
                    val final' = ProofContext.export context'' context' [final];
berghofe@20376
  1947
                    val _ = warning "finished!"
berghofe@20376
  1948
                  in
berghofe@20376
  1949
                    resolve_tac final' 1
berghofe@20397
  1950
                  end) context 1])) idxss) (ndescr ~~ rec_elims))
berghofe@20397
  1951
         end));
berghofe@20397
  1952
berghofe@20397
  1953
    val rec_total_thms = map (fn r => r RS theI') rec_unique_thms;
berghofe@20397
  1954
berghofe@20397
  1955
    (* define primrec combinators *)
berghofe@20397
  1956
berghofe@20397
  1957
    val big_reccomb_name = (space_implode "_" new_type_names) ^ "_rec";
berghofe@20397
  1958
    val reccomb_names = map (Sign.full_name thy11)
berghofe@20397
  1959
      (if length descr'' = 1 then [big_reccomb_name] else
berghofe@20397
  1960
        (map ((curry (op ^) (big_reccomb_name ^ "_")) o string_of_int)
berghofe@20397
  1961
          (1 upto (length descr''))));
berghofe@20397
  1962
    val reccombs = map (fn ((name, T), T') => list_comb
berghofe@20397
  1963
      (Const (name, rec_fn_Ts @ [T] ---> T'), rec_fns))
berghofe@20397
  1964
        (reccomb_names ~~ recTs ~~ rec_result_Ts);
berghofe@20397
  1965
berghofe@20397
  1966
    val (reccomb_defs, thy12) =
berghofe@20397
  1967
      thy11
wenzelm@24712
  1968
      |> Sign.add_consts_i (map (fn ((name, T), T') =>
berghofe@20397
  1969
          (Sign.base_name name, rec_fn_Ts @ [T] ---> T', NoSyn))
berghofe@20397
  1970
          (reccomb_names ~~ recTs ~~ rec_result_Ts))
haftmann@27691
  1971
      |> (PureThy.add_defs false o map Thm.no_attributes) (map (fn ((((name, comb), set), T), T') =>
berghofe@20397
  1972
          ((Sign.base_name name) ^ "_def", Logic.mk_equals (comb, absfree ("x", T,
berghofe@20397
  1973
           Const ("The", (T' --> HOLogic.boolT) --> T') $ absfree ("y", T',
berghofe@21021
  1974
             set $ Free ("x", T) $ Free ("y", T'))))))
berghofe@20397
  1975
               (reccomb_names ~~ reccombs ~~ rec_sets ~~ recTs ~~ rec_result_Ts));
berghofe@20397
  1976
berghofe@20397
  1977
    (* prove characteristic equations for primrec combinators *)
berghofe@20397
  1978
berghofe@20397
  1979
    val rec_thms = map (fn (prems, concl) =>
berghofe@20397
  1980
      let
berghofe@20397
  1981
        val _ $ (_ $ (_ $ x) $ _) = concl;
berghofe@20397
  1982
        val (_, cargs) = strip_comb x;
berghofe@20397
  1983
        val ps = map (fn (x as Free (_, T), i) =>
berghofe@20397
  1984
          (Free ("x" ^ string_of_int i, T), x)) (cargs ~~ (1 upto length cargs));
berghofe@20397
  1985
        val concl' = subst_atomic_types (rec_result_Ts' ~~ rec_result_Ts) concl;
berghofe@21088
  1986
        val prems' = List.concat finite_premss @ finite_ctxt_prems @
berghofe@21088
  1987
          rec_prems @ rec_prems' @ map (subst_atomic ps) prems;
berghofe@20397
  1988
        fun solve rules prems = resolve_tac rules THEN_ALL_NEW
berghofe@20397
  1989
          (resolve_tac prems THEN_ALL_NEW atac)
berghofe@20397
  1990
      in
berghofe@20397
  1991
        Goal.prove_global thy12 [] prems' concl'
wenzelm@26711
  1992
          (fn {prems, ...} => EVERY
berghofe@20397
  1993
            [rewrite_goals_tac reccomb_defs,
berghofe@20397
  1994
             rtac the1_equality 1,
berghofe@20397
  1995
             solve rec_unique_thms prems 1,
berghofe@20397
  1996
             resolve_tac rec_intrs 1,
berghofe@20397
  1997
             REPEAT (solve (prems @ rec_total_thms) prems 1)])
berghofe@20397
  1998
      end) (rec_eq_prems ~~
berghofe@20397
  1999
        DatatypeProp.make_primrecs new_type_names descr' sorts' thy12);
wenzelm@21365
  2000
berghofe@22433
  2001
    val dt_infos = map (make_dt_info pdescr sorts induct reccomb_names rec_thms)
berghofe@21540
  2002
      ((0 upto length descr1 - 1) ~~ descr1 ~~ distinct_thms ~~ inject_thms);
berghofe@21540
  2003
berghofe@19985
  2004
    (* FIXME: theorems are stored in database for testing only *)
berghofe@20397
  2005
    val (_, thy13) = thy12 |>
berghofe@20145
  2006
      PureThy.add_thmss
berghofe@20145
  2007
        [(("rec_equiv", List.concat rec_equiv_thms), []),
berghofe@20145
  2008
         (("rec_equiv'", List.concat rec_equiv_thms'), []),
berghofe@20145
  2009
         (("rec_fin_supp", List.concat rec_fin_supp_thms), []),
berghofe@20376
  2010
         (("rec_fresh", List.concat rec_fresh_thms), []),
berghofe@20397
  2011
         (("rec_unique", map standard rec_unique_thms), []),
berghofe@20397
  2012
         (("recs", rec_thms), [])] ||>
wenzelm@24712
  2013
      Sign.parent_path ||>
berghofe@21540
  2014
      map_nominal_datatypes (fold Symtab.update dt_infos);
berghofe@19985
  2015
berghofe@17870
  2016
  in
berghofe@20397
  2017
    thy13
berghofe@17870
  2018
  end;
berghofe@17870
  2019
wenzelm@27275
  2020
val add_nominal_datatype = gen_add_nominal_datatype DatatypePackage.read_typ true;
berghofe@17870
  2021
berghofe@17870
  2022
berghofe@17870
  2023
(* FIXME: The following stuff should be exported by DatatypePackage *)
berghofe@17870
  2024
berghofe@17870
  2025
local structure P = OuterParse and K = OuterKeyword in
berghofe@17870
  2026
berghofe@17870
  2027
val datatype_decl =
berghofe@17870
  2028
  Scan.option (P.$$$ "(" |-- P.name --| P.$$$ ")") -- P.type_args -- P.name -- P.opt_infix --
berghofe@17870
  2029
    (P.$$$ "=" |-- P.enum1 "|" (P.name -- Scan.repeat P.typ -- P.opt_mixfix));
berghofe@17870
  2030
berghofe@17870
  2031
fun mk_datatype args =
berghofe@17870
  2032
  let
berghofe@17870
  2033
    val names = map (fn ((((NONE, _), t), _), _) => t | ((((SOME t, _), _), _), _) => t) args;
berghofe@17870
  2034
    val specs = map (fn ((((_, vs), t), mx), cons) =>
berghofe@17870
  2035
      (vs, t, mx, map (fn ((x, y), z) => (x, y, z)) cons)) args;
berghofe@18068
  2036
  in add_nominal_datatype false names specs end;
berghofe@17870
  2037
wenzelm@24867
  2038
val _ =
berghofe@17870
  2039
  OuterSyntax.command "nominal_datatype" "define inductive datatypes" K.thy_decl
berghofe@17870
  2040
    (P.and_list1 datatype_decl >> (Toplevel.theory o mk_datatype));
berghofe@17870
  2041
berghofe@17870
  2042
end;
berghofe@17870
  2043
berghofe@18261
  2044
end