src/HOL/Tools/inductive_realizer.ML
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(*  Title:      HOL/Tools/inductive_realizer.ML
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    Author:     Stefan Berghofer, TU Muenchen
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Program extraction from proofs involving inductive predicates:
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Realizers for induction and elimination rules.
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*)
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signature INDUCTIVE_REALIZER =
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sig
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  val add_ind_realizers: string -> string list -> theory -> theory
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  val setup: theory -> theory
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end;
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structure InductiveRealizer : INDUCTIVE_REALIZER =
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struct
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(* FIXME: Local_Theory.note should return theorems with proper names! *)  (* FIXME ?? *)
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fun name_of_thm thm =
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  (case Proofterm.fold_proof_atoms false (fn PThm (_, ((name, _, _), _)) => cons name | _ => I)
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      [Thm.proof_of thm] [] of
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    [name] => name
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  | _ => error ("name_of_thm: bad proof of theorem\n" ^ Display.string_of_thm_without_context thm));
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fun prf_of thm =
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  let
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    val thy = Thm.theory_of_thm thm;
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    val thm' = Reconstruct.reconstruct_proof thy (Thm.prop_of thm) (Thm.proof_of thm);
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  in Reconstruct.expand_proof thy [("", NONE)] thm' end; (* FIXME *)
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fun subsets [] = [[]]
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  | subsets (x::xs) =
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      let val ys = subsets xs
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      in ys @ map (cons x) ys end;
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val pred_of = fst o dest_Const o head_of;
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fun strip_all' used names (Const ("all", _) $ Abs (s, T, t)) =
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      let val (s', names') = (case names of
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          [] => (Name.variant used s, [])
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        | name :: names' => (name, names'))
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      in strip_all' (s'::used) names' (subst_bound (Free (s', T), t)) end
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  | strip_all' used names ((t as Const ("==>", _) $ P) $ Q) =
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      t $ strip_all' used names Q
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  | strip_all' _ _ t = t;
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fun strip_all t = strip_all' (Term.add_free_names t []) [] t;
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fun strip_one name (Const ("all", _) $ Abs (s, T, Const ("==>", _) $ P $ Q)) =
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      (subst_bound (Free (name, T), P), subst_bound (Free (name, T), Q))
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  | strip_one _ (Const ("==>", _) $ P $ Q) = (P, Q);
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fun relevant_vars prop = fold (fn ((a, i), T) => fn vs =>
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     (case strip_type T of
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        (_, Type (s, _)) => if s = @{type_name bool} then (a, T) :: vs else vs
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      | _ => vs)) (Term.add_vars prop []) [];
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val attach_typeS = map_types (map_atyps
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  (fn TFree (s, []) => TFree (s, HOLogic.typeS)
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    | TVar (ixn, []) => TVar (ixn, HOLogic.typeS)
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    | T => T));
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fun dt_of_intrs thy vs nparms intrs =
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  let
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    val iTs = rev (Term.add_tvars (prop_of (hd intrs)) []);
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    val (Const (s, _), ts) = strip_comb (HOLogic.dest_Trueprop
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      (Logic.strip_imp_concl (prop_of (hd intrs))));
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    val params = map dest_Var (take nparms ts);
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    val tname = Binding.name (space_implode "_" (Long_Name.base_name s ^ "T" :: vs));
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    fun constr_of_intr intr = (Binding.name (Long_Name.base_name (name_of_thm intr)),
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      map (Logic.unvarifyT_global o snd) (subtract (op =) params (rev (Term.add_vars (prop_of intr) []))) @
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        filter_out (equal Extraction.nullT) (map
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          (Logic.unvarifyT_global o Extraction.etype_of thy vs []) (prems_of intr)),
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            NoSyn);
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  in (map (fn a => "'" ^ a) vs @ map (fst o fst) iTs, tname, NoSyn,
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    map constr_of_intr intrs)
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  end;
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fun mk_rlz T = Const ("realizes", [T, HOLogic.boolT] ---> HOLogic.boolT);
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(** turn "P" into "%r x. realizes r (P x)" **)
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fun gen_rvar vs (t as Var ((a, 0), T)) =
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      if body_type T <> HOLogic.boolT then t else
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        let
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          val U = TVar (("'" ^ a, 0), [])
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          val Ts = binder_types T;
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          val i = length Ts;
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          val xs = map (pair "x") Ts;
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          val u = list_comb (t, map Bound (i - 1 downto 0))
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        in 
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          if member (op =) vs a then
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            list_abs (("r", U) :: xs, mk_rlz U $ Bound i $ u)
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          else list_abs (xs, mk_rlz Extraction.nullT $ Extraction.nullt $ u)
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        end
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  | gen_rvar _ t = t;
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fun mk_realizes_eqn n vs nparms intrs =
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  let
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    val intr = map_types Type.strip_sorts (prop_of (hd intrs));
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    val concl = HOLogic.dest_Trueprop (Logic.strip_imp_concl intr);
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    val iTs = rev (Term.add_tvars intr []);
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    val Tvs = map TVar iTs;
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    val (h as Const (s, T), us) = strip_comb concl;
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    val params = List.take (us, nparms);
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    val elTs = List.drop (binder_types T, nparms);
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    val predT = elTs ---> HOLogic.boolT;
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    val used = map (fst o fst o dest_Var) params;
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    val xs = map (Var o apfst (rpair 0))
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      (Name.variant_list used (replicate (length elTs) "x") ~~ elTs);
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    val rT = if n then Extraction.nullT
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      else Type (space_implode "_" (s ^ "T" :: vs),
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        map (fn a => TVar (("'" ^ a, 0), [])) vs @ Tvs);
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    val r = if n then Extraction.nullt else Var ((Long_Name.base_name s, 0), rT);
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    val S = list_comb (h, params @ xs);
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    val rvs = relevant_vars S;
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    val vs' = subtract (op =) vs (map fst rvs);
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    val rname = space_implode "_" (s ^ "R" :: vs);
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    fun mk_Tprem n v =
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      let val T = (the o AList.lookup (op =) rvs) v
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      in (Const ("typeof", T --> Type ("Type", [])) $ Var ((v, 0), T),
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        Extraction.mk_typ (if n then Extraction.nullT
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          else TVar (("'" ^ v, 0), [])))
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      end;
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    val prems = map (mk_Tprem true) vs' @ map (mk_Tprem false) vs;
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    val ts = map (gen_rvar vs) params;
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    val argTs = map fastype_of ts;
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  in ((prems, (Const ("typeof", HOLogic.boolT --> Type ("Type", [])) $ S,
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       Extraction.mk_typ rT)),
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    (prems, (mk_rlz rT $ r $ S,
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       if n then list_comb (Const (rname, argTs ---> predT), ts @ xs)
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       else list_comb (Const (rname, argTs @ [rT] ---> predT), ts @ [r] @ xs))))
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  end;
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fun fun_of_prem thy rsets vs params rule ivs intr =
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  let
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    val ctxt = ProofContext.init_global thy
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    val args = map (Free o apfst fst o dest_Var) ivs;
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    val args' = map (Free o apfst fst)
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      (subtract (op =) params (Term.add_vars (prop_of intr) []));
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    val rule' = strip_all rule;
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    val conclT = Extraction.etype_of thy vs [] (Logic.strip_imp_concl rule');
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    val used = map (fst o dest_Free) args;
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    val is_rec = exists_Const (fn (c, _) => member (op =) rsets c);
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    fun is_meta (Const ("all", _) $ Abs (s, _, P)) = is_meta P
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      | is_meta (Const ("==>", _) $ _ $ Q) = is_meta Q
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      | is_meta (Const (@{const_name Trueprop}, _) $ t) =
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          (case head_of t of
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            Const (s, _) => can (Inductive.the_inductive ctxt) s
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          | _ => true)
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      | is_meta _ = false;
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    fun fun_of ts rts args used (prem :: prems) =
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          let
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            val T = Extraction.etype_of thy vs [] prem;
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            val [x, r] = Name.variant_list used ["x", "r"]
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          in if T = Extraction.nullT
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            then fun_of ts rts args used prems
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            else if is_rec prem then
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              if is_meta prem then
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                let
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                  val prem' :: prems' = prems;
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                  val U = Extraction.etype_of thy vs [] prem';
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                in if U = Extraction.nullT
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                  then fun_of (Free (x, T) :: ts)
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                    (Free (r, binder_types T ---> HOLogic.unitT) :: rts)
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                    (Free (x, T) :: args) (x :: r :: used) prems'
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                  else fun_of (Free (x, T) :: ts) (Free (r, U) :: rts)
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                    (Free (r, U) :: Free (x, T) :: args) (x :: r :: used) prems'
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                end
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              else (case strip_type T of
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                  (Ts, Type (@{type_name Product_Type.prod}, [T1, T2])) =>
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                    let
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                      val fx = Free (x, Ts ---> T1);
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                      val fr = Free (r, Ts ---> T2);
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                      val bs = map Bound (length Ts - 1 downto 0);
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                      val t = list_abs (map (pair "z") Ts,
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                        HOLogic.mk_prod (list_comb (fx, bs), list_comb (fr, bs)))
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                    in fun_of (fx :: ts) (fr :: rts) (t::args)
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                      (x :: r :: used) prems
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                    end
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                | (Ts, U) => fun_of (Free (x, T) :: ts)
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                    (Free (r, binder_types T ---> HOLogic.unitT) :: rts)
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                    (Free (x, T) :: args) (x :: r :: used) prems)
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            else fun_of (Free (x, T) :: ts) rts (Free (x, T) :: args)
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              (x :: used) prems
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          end
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      | fun_of ts rts args used [] =
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          let val xs = rev (rts @ ts)
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          in if conclT = Extraction.nullT
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            then list_abs_free (map dest_Free xs, HOLogic.unit)
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            else list_abs_free (map dest_Free xs, list_comb
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              (Free ("r" ^ Long_Name.base_name (name_of_thm intr),
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                map fastype_of (rev args) ---> conclT), rev args))
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          end
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  in fun_of args' [] (rev args) used (Logic.strip_imp_prems rule') end;
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fun indrule_realizer thy induct raw_induct rsets params vs rec_names rss intrs dummies =
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  let
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    val concls = HOLogic.dest_conj (HOLogic.dest_Trueprop (concl_of raw_induct));
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    val premss = map_filter (fn (s, rs) => if member (op =) rsets s then
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      SOME (rs, map (fn (_, r) => nth (prems_of raw_induct)
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        (find_index (fn prp => prp = prop_of r) (map prop_of intrs))) rs) else NONE) rss;
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    val fs = maps (fn ((intrs, prems), dummy) =>
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      let
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        val fs = map (fn (rule, (ivs, intr)) =>
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          fun_of_prem thy rsets vs params rule ivs intr) (prems ~~ intrs)
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      in
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        if dummy then Const (@{const_name default},
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            HOLogic.unitT --> body_type (fastype_of (hd fs))) :: fs
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        else fs
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      end) (premss ~~ dummies);
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    val frees = fold Term.add_frees fs [];
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    val Ts = map fastype_of fs;
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    fun name_of_fn intr = "r" ^ Long_Name.base_name (name_of_thm intr)
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  in
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    fst (fold_map (fn concl => fn names =>
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      let val T = Extraction.etype_of thy vs [] concl
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      in if T = Extraction.nullT then (Extraction.nullt, names) else
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        let
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          val Type ("fun", [U, _]) = T;
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          val a :: names' = names
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        in (list_abs_free (("x", U) :: map_filter (fn intr =>
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          Option.map (pair (name_of_fn intr))
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            (AList.lookup (op =) frees (name_of_fn intr))) intrs,
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          list_comb (Const (a, Ts ---> T), fs) $ Free ("x", U)), names')
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        end
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      end) concls rec_names)
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  end;
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fun add_dummy name dname (x as (_, (vs, s, mfx, cs))) =
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  if Binding.eq_name (name, s) then (true, (vs, s, mfx, (dname, [HOLogic.unitT], NoSyn) :: cs))
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  else x;
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fun add_dummies f [] _ thy =
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      (([], NONE), thy)
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  | add_dummies f dts used thy =
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      thy
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      |> f (map snd dts)
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      |-> (fn dtinfo => pair (map fst dts, SOME dtinfo))
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    handle Datatype_Aux.Datatype_Empty name' =>
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      let
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        val name = Long_Name.base_name name';
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        val dname = Name.variant used "Dummy";
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      in
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        thy
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        |> add_dummies f (map (add_dummy (Binding.name name) (Binding.name dname)) dts) (dname :: used)
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      end;
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fun mk_realizer thy vs (name, rule, rrule, rlz, rt) =
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  let
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    val rvs = map fst (relevant_vars (prop_of rule));
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    val xs = rev (Term.add_vars (prop_of rule) []);
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    val vs1 = map Var (filter_out (fn ((a, _), _) => member (op =) rvs a) xs);
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    val rlzvs = rev (Term.add_vars (prop_of rrule) []);
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    val vs2 = map (fn (ixn, _) => Var (ixn, (the o AList.lookup (op =) rlzvs) ixn)) xs;
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    val rs = map Var (subtract (op = o pairself fst) xs rlzvs);
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    val rlz' = fold_rev Logic.all rs (prop_of rrule)
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  in (name, (vs,
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    if rt = Extraction.nullt then rt else fold_rev lambda vs1 rt,
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    Extraction.abs_corr_shyps thy rule vs vs2
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      (ProofRewriteRules.un_hhf_proof rlz' (attach_typeS rlz)
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         (fold_rev Proofterm.forall_intr_proof' rs (prf_of rrule)))))
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  end;
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fun rename tab = map (fn x => the_default x (AList.lookup op = tab x));
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fun add_ind_realizer rsets intrs induct raw_induct elims vs thy =
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  let
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    val qualifier = Long_Name.qualifier (name_of_thm induct);
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    val inducts = PureThy.get_thms thy (Long_Name.qualify qualifier "inducts");
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    val iTs = rev (Term.add_tvars (prop_of (hd intrs)) []);
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    val ar = length vs + length iTs;
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    val params = Inductive.params_of raw_induct;
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    val arities = Inductive.arities_of raw_induct;
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    val nparms = length params;
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    val params' = map dest_Var params;
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    val rss = Inductive.partition_rules raw_induct intrs;
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   284
    val rss' = map (fn (((s, rs), (_, arity)), elim) =>
31723
f5cafe803b55 discontinued ancient tradition to suffix certain ML module names with "_package"
haftmann
parents: 31668
diff changeset
   285
      (s, (Inductive.infer_intro_vars elim arity rs ~~ rs)))
22790
e1cff9268177 Moved functions infer_intro_vars, arities_of, params_of, and
berghofe
parents: 22606
diff changeset
   286
        (rss ~~ arities ~~ elims);
30364
577edc39b501 moved basic algebra of long names from structure NameSpace to Long_Name;
wenzelm
parents: 30345
diff changeset
   287
    val (prfx, _) = split_last (Long_Name.explode (fst (hd rss)));
13710
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   288
    val tnames = map (fn s => space_implode "_" (s ^ "T" :: vs)) rsets;
16123
1381e90c2694 Theory.restore_naming;
wenzelm
parents: 15706
diff changeset
   289
13710
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parents:
diff changeset
   290
    val thy1 = thy |>
24712
64ed05609568 proper Sign operations instead of Theory aliases;
wenzelm
parents: 24157
diff changeset
   291
      Sign.root_path |>
30364
577edc39b501 moved basic algebra of long names from structure NameSpace to Long_Name;
wenzelm
parents: 30345
diff changeset
   292
      Sign.add_path (Long_Name.implode prfx);
13710
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parents:
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   293
    val (ty_eqs, rlz_eqs) = split_list
36692
54b64d4ad524 farewell to old-style mem infixes -- type inference in situations with mem_int and mem_string should provide enough information to resolve the type of (op =)
haftmann
parents: 36610
diff changeset
   294
      (map (fn (s, rs) => mk_realizes_eqn (not (member (op =) rsets s)) vs nparms rs) rss);
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diff changeset
   295
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
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parents:
diff changeset
   296
    val thy1' = thy1 |>
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parents:
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   297
      Theory.copy |>
30364
577edc39b501 moved basic algebra of long names from structure NameSpace to Long_Name;
wenzelm
parents: 30345
diff changeset
   298
      Sign.add_types (map (fn s => (Binding.name (Long_Name.base_name s), ar, NoSyn)) tnames) |>
13710
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diff changeset
   299
        Extraction.add_typeof_eqns_i ty_eqs;
36692
54b64d4ad524 farewell to old-style mem infixes -- type inference in situations with mem_int and mem_string should provide enough information to resolve the type of (op =)
haftmann
parents: 36610
diff changeset
   300
    val dts = map_filter (fn (s, rs) => if member (op =) rsets s then
22271
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parents: 21858
diff changeset
   301
      SOME (dt_of_intrs thy1' vs nparms rs) else NONE) rss;
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parents:
diff changeset
   302
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
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parents:
diff changeset
   303
    (** datatype representing computational content of inductive set **)
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parents:
diff changeset
   304
31783
cfbe9609ceb1 add_datatypes does not yield particular rules any longer
haftmann
parents: 31781
diff changeset
   305
    val ((dummies, some_dt_names), thy2) =
18008
f193815cab2c swapped add_datatype result
haftmann
parents: 17959
diff changeset
   306
      thy1
31723
f5cafe803b55 discontinued ancient tradition to suffix certain ML module names with "_package"
haftmann
parents: 31668
diff changeset
   307
      |> add_dummies (Datatype.add_datatype
32125
10e1a6ea8df9 dropped ancient flat_names option
haftmann
parents: 31986
diff changeset
   308
           { strict = false, quiet = false } (map (Binding.name_of o #2) dts))
18314
4595eb4627fa oriented pairs theory * 'a to 'a * theory
haftmann
parents: 18008
diff changeset
   309
           (map (pair false) dts) []
4595eb4627fa oriented pairs theory * 'a to 'a * theory
haftmann
parents: 18008
diff changeset
   310
      ||> Extraction.add_typeof_eqns_i ty_eqs
4595eb4627fa oriented pairs theory * 'a to 'a * theory
haftmann
parents: 18008
diff changeset
   311
      ||> Extraction.add_realizes_eqns_i rlz_eqs;
31783
cfbe9609ceb1 add_datatypes does not yield particular rules any longer
haftmann
parents: 31781
diff changeset
   312
    val dt_names = these some_dt_names;
31784
bd3486c57ba3 tuned interfaces of datatype module
haftmann
parents: 31783
diff changeset
   313
    val case_thms = map (#case_rewrites o Datatype.the_info thy2) dt_names;
31783
cfbe9609ceb1 add_datatypes does not yield particular rules any longer
haftmann
parents: 31781
diff changeset
   314
    val rec_thms = if null dt_names then []
31784
bd3486c57ba3 tuned interfaces of datatype module
haftmann
parents: 31783
diff changeset
   315
      else (#rec_rewrites o Datatype.the_info thy2) (hd dt_names);
19046
bc5c6c9b114e removed distinct, renamed gen_distinct to distinct;
wenzelm
parents: 18929
diff changeset
   316
    val rec_names = distinct (op =) (map (fst o dest_Const o head_of o fst o
31781
861e675f01e6 add_datatype interface yields type names and less rules
haftmann
parents: 31723
diff changeset
   317
      HOLogic.dest_eq o HOLogic.dest_Trueprop o prop_of) rec_thms);
31458
b1cf26f2919b avoid Library.foldl_map
haftmann
parents: 31177
diff changeset
   318
    val (constrss, _) = fold_map (fn (s, rs) => fn (recs, dummies) =>
b1cf26f2919b avoid Library.foldl_map
haftmann
parents: 31177
diff changeset
   319
      if member (op =) rsets s then
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parents:
diff changeset
   320
        let
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   321
          val (d :: dummies') = dummies;
19473
wenzelm
parents: 19046
diff changeset
   322
          val (recs1, recs2) = chop (length rs) (if d then tl recs else recs)
31458
b1cf26f2919b avoid Library.foldl_map
haftmann
parents: 31177
diff changeset
   323
        in (map (head_of o hd o rev o snd o strip_comb o fst o
b1cf26f2919b avoid Library.foldl_map
haftmann
parents: 31177
diff changeset
   324
          HOLogic.dest_eq o HOLogic.dest_Trueprop o prop_of) recs1, (recs2, dummies'))
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   325
        end
31458
b1cf26f2919b avoid Library.foldl_map
haftmann
parents: 31177
diff changeset
   326
      else (replicate (length rs) Extraction.nullt, (recs, dummies)))
31781
861e675f01e6 add_datatype interface yields type names and less rules
haftmann
parents: 31723
diff changeset
   327
        rss (rec_thms, dummies);
37233
b78f31ca4675 Adapted to new format of proof terms containing explicit proofs of class membership.
berghofe
parents: 36945
diff changeset
   328
    val rintrs = map (fn (intr, c) => attach_typeS (Envir.eta_contract
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   329
      (Extraction.realizes_of thy2 vs
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   330
        (if c = Extraction.nullt then c else list_comb (c, map Var (rev
37233
b78f31ca4675 Adapted to new format of proof terms containing explicit proofs of class membership.
berghofe
parents: 36945
diff changeset
   331
          (subtract (op =) params' (Term.add_vars (prop_of intr) []))))) (prop_of intr))))
32952
aeb1e44fbc19 replaced String.concat by implode;
wenzelm
parents: 32131
diff changeset
   332
            (maps snd rss ~~ flat constrss);
30345
76fd85bbf139 more uniform handling of binding in packages;
wenzelm
parents: 30280
diff changeset
   333
    val (rlzpreds, rlzpreds') =
76fd85bbf139 more uniform handling of binding in packages;
wenzelm
parents: 30280
diff changeset
   334
      rintrs |> map (fn rintr =>
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   335
        let
30345
76fd85bbf139 more uniform handling of binding in packages;
wenzelm
parents: 30280
diff changeset
   336
          val Const (s, T) = head_of (HOLogic.dest_Trueprop (Logic.strip_assums_concl rintr));
30364
577edc39b501 moved basic algebra of long names from structure NameSpace to Long_Name;
wenzelm
parents: 30345
diff changeset
   337
          val s' = Long_Name.base_name s;
35845
e5980f0ad025 renamed varify/unvarify operations to varify_global/unvarify_global to emphasize that these only work in a global situation;
wenzelm
parents: 35625
diff changeset
   338
          val T' = Logic.unvarifyT_global T;
30345
76fd85bbf139 more uniform handling of binding in packages;
wenzelm
parents: 30280
diff changeset
   339
        in (((s', T'), NoSyn), (Const (s, T'), Free (s', T'))) end)
76fd85bbf139 more uniform handling of binding in packages;
wenzelm
parents: 30280
diff changeset
   340
      |> distinct (op = o pairself (#1 o #1))
76fd85bbf139 more uniform handling of binding in packages;
wenzelm
parents: 30280
diff changeset
   341
      |> map (apfst (apfst (apfst Binding.name)))
76fd85bbf139 more uniform handling of binding in packages;
wenzelm
parents: 30280
diff changeset
   342
      |> split_list;
76fd85bbf139 more uniform handling of binding in packages;
wenzelm
parents: 30280
diff changeset
   343
35845
e5980f0ad025 renamed varify/unvarify operations to varify_global/unvarify_global to emphasize that these only work in a global situation;
wenzelm
parents: 35625
diff changeset
   344
    val rlzparams = map (fn Var ((s, _), T) => (s, Logic.unvarifyT_global T))
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   345
      (List.take (snd (strip_comb
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   346
        (HOLogic.dest_Trueprop (Logic.strip_assums_concl (hd rintrs)))), nparms));
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   347
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   348
    (** realizability predicate **)
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   349
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   350
    val (ind_info, thy3') = thy2 |>
33726
0878aecbf119 eliminated slightly odd name space grouping -- now managed by Isar toplevel;
wenzelm
parents: 33671
diff changeset
   351
      Inductive.add_inductive_global
33669
ae9a2ea9a989 inductive: eliminated obsolete kind;
wenzelm
parents: 33666
diff changeset
   352
        {quiet_mode = false, verbose = false, alt_name = Binding.empty, coind = false,
ae9a2ea9a989 inductive: eliminated obsolete kind;
wenzelm
parents: 33666
diff changeset
   353
          no_elim = false, no_ind = false, skip_mono = false, fork_mono = false}
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   354
        rlzpreds rlzparams (map (fn (rintr, intr) =>
30364
577edc39b501 moved basic algebra of long names from structure NameSpace to Long_Name;
wenzelm
parents: 30345
diff changeset
   355
          ((Binding.name (Long_Name.base_name (name_of_thm intr)), []),
35845
e5980f0ad025 renamed varify/unvarify operations to varify_global/unvarify_global to emphasize that these only work in a global situation;
wenzelm
parents: 35625
diff changeset
   356
           subst_atomic rlzpreds' (Logic.unvarify_global rintr)))
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   357
             (rintrs ~~ maps snd rss)) [] ||>
30435
e62d6ecab6ad explicit Binding.qualified_name -- prevents implicitly qualified bstring;
wenzelm
parents: 30364
diff changeset
   358
      Sign.root_path;
26663
020618551468 PureThy.hide_fact;
wenzelm
parents: 26626
diff changeset
   359
    val thy3 = fold (PureThy.hide_fact false o name_of_thm) (#intrs ind_info) thy3';
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   360
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   361
    (** realizer for induction rule **)
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   362
36692
54b64d4ad524 farewell to old-style mem infixes -- type inference in situations with mem_int and mem_string should provide enough information to resolve the type of (op =)
haftmann
parents: 36610
diff changeset
   363
    val Ps = map_filter (fn _ $ M $ P => if member (op =) rsets (pred_of M) then
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 14981
diff changeset
   364
      SOME (fst (fst (dest_Var (head_of P)))) else NONE)
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   365
        (HOLogic.dest_conj (HOLogic.dest_Trueprop (concl_of raw_induct)));
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   366
33244
db230399f890 Datatype.read_typ: standard argument order;
wenzelm
parents: 33171
diff changeset
   367
    fun add_ind_realizer Ps thy =
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   368
      let
24157
409cd6eaa7ea Added renaming function to prevent correctness proof for realizer
berghofe
parents: 23590
diff changeset
   369
        val vs' = rename (map (pairself (fst o fst o dest_Var))
409cd6eaa7ea Added renaming function to prevent correctness proof for realizer
berghofe
parents: 23590
diff changeset
   370
          (params ~~ List.take (snd (strip_comb (HOLogic.dest_Trueprop
409cd6eaa7ea Added renaming function to prevent correctness proof for realizer
berghofe
parents: 23590
diff changeset
   371
            (hd (prems_of (hd inducts))))), nparms))) vs;
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   372
        val rs = indrule_realizer thy induct raw_induct rsets params'
24157
409cd6eaa7ea Added renaming function to prevent correctness proof for realizer
berghofe
parents: 23590
diff changeset
   373
          (vs' @ Ps) rec_names rss' intrs dummies;
409cd6eaa7ea Added renaming function to prevent correctness proof for realizer
berghofe
parents: 23590
diff changeset
   374
        val rlzs = map (fn (r, ind) => Extraction.realizes_of thy (vs' @ Ps) r
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   375
          (prop_of ind)) (rs ~~ inducts);
29281
b22ccb3998db eliminated OldTerm.add_term_free_names;
wenzelm
parents: 29271
diff changeset
   376
        val used = fold Term.add_free_names rlzs [];
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   377
        val rnames = Name.variant_list used (replicate (length inducts) "r");
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   378
        val rnames' = Name.variant_list
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   379
          (used @ rnames) (replicate (length intrs) "s");
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   380
        val rlzs' as (prems, _, _) :: _ = map (fn (rlz, name) =>
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   381
          let
35845
e5980f0ad025 renamed varify/unvarify operations to varify_global/unvarify_global to emphasize that these only work in a global situation;
wenzelm
parents: 35625
diff changeset
   382
            val (P, Q) = strip_one name (Logic.unvarify_global rlz);
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   383
            val Q' = strip_all' [] rnames' Q
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   384
          in
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   385
            (Logic.strip_imp_prems Q', P, Logic.strip_imp_concl Q')
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   386
          end) (rlzs ~~ rnames);
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   387
        val concl = HOLogic.mk_Trueprop (foldr1 HOLogic.mk_conj (map
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   388
          (fn (_, _ $ P, _ $ Q) => HOLogic.mk_imp (P, Q)) rlzs'));
37136
e0c9d3e49e15 dropped legacy theorem bindings
haftmann
parents: 36945
diff changeset
   389
        val rews = map mk_meta_eq (@{thm fst_conv} :: @{thm snd_conv} :: rec_thms);
37233
b78f31ca4675 Adapted to new format of proof terms containing explicit proofs of class membership.
berghofe
parents: 36945
diff changeset
   390
        val thm = Goal.prove_global thy []
b78f31ca4675 Adapted to new format of proof terms containing explicit proofs of class membership.
berghofe
parents: 36945
diff changeset
   391
          (map attach_typeS prems) (attach_typeS concl)
b78f31ca4675 Adapted to new format of proof terms containing explicit proofs of class membership.
berghofe
parents: 36945
diff changeset
   392
          (fn {prems, ...} => EVERY
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   393
          [rtac (#raw_induct ind_info) 1,
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   394
           rewrite_goals_tac rews,
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   395
           REPEAT ((resolve_tac prems THEN_ALL_NEW EVERY'
35625
9c818cab0dd0 modernized structure Object_Logic;
wenzelm
parents: 35402
diff changeset
   396
             [K (rewrite_goals_tac rews), Object_Logic.atomize_prems_tac,
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   397
              DEPTH_SOLVE_1 o FIRST' [atac, etac allE, etac impE]]) 1)]);
30435
e62d6ecab6ad explicit Binding.qualified_name -- prevents implicitly qualified bstring;
wenzelm
parents: 30364
diff changeset
   398
        val (thm', thy') = PureThy.store_thm (Binding.qualified_name (space_implode "_"
30364
577edc39b501 moved basic algebra of long names from structure NameSpace to Long_Name;
wenzelm
parents: 30345
diff changeset
   399
          (Long_Name.qualify qualifier "induct" :: vs' @ Ps @ ["correctness"])), thm) thy;
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   400
        val thms = map (fn th => zero_var_indexes (rotate_prems ~1 (th RS mp)))
33968
f94fb13ecbb3 modernized structures and tuned headers of datatype package modules; joined former datatype.ML and datatype_rep_proofs.ML
haftmann
parents: 33957
diff changeset
   401
          (Datatype_Aux.split_conj_thm thm');
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   402
        val ([thms'], thy'') = PureThy.add_thmss
30435
e62d6ecab6ad explicit Binding.qualified_name -- prevents implicitly qualified bstring;
wenzelm
parents: 30364
diff changeset
   403
          [((Binding.qualified_name (space_implode "_"
30364
577edc39b501 moved basic algebra of long names from structure NameSpace to Long_Name;
wenzelm
parents: 30345
diff changeset
   404
             (Long_Name.qualify qualifier "inducts" :: vs' @ Ps @
29579
cb520b766e00 binding replaces bstring
haftmann
parents: 29389
diff changeset
   405
               ["correctness"])), thms), [])] thy';
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   406
        val realizers = inducts ~~ thms' ~~ rlzs ~~ rs;
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   407
      in
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   408
        Extraction.add_realizers_i
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   409
          (map (fn (((ind, corr), rlz), r) =>
37233
b78f31ca4675 Adapted to new format of proof terms containing explicit proofs of class membership.
berghofe
parents: 36945
diff changeset
   410
              mk_realizer thy'' (vs' @ Ps) (Thm.derivation_name ind, ind, corr, rlz, r))
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   411
            realizers @ (case realizers of
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   412
             [(((ind, corr), rlz), r)] =>
37233
b78f31ca4675 Adapted to new format of proof terms containing explicit proofs of class membership.
berghofe
parents: 36945
diff changeset
   413
               [mk_realizer thy'' (vs' @ Ps) (Long_Name.qualify qualifier "induct",
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   414
                  ind, corr, rlz, r)]
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   415
           | _ => [])) thy''
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   416
      end;
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   417
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   418
    (** realizer for elimination rules **)
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   419
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   420
    val case_names = map (fst o dest_Const o head_of o fst o HOLogic.dest_eq o
31781
861e675f01e6 add_datatype interface yields type names and less rules
haftmann
parents: 31723
diff changeset
   421
      HOLogic.dest_Trueprop o prop_of o hd) case_thms;
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   422
13921
69c627b6b28d Fixed problem in add_elim_realizer which caused bound variables to
berghofe
parents: 13725
diff changeset
   423
    fun add_elim_realizer Ps
69c627b6b28d Fixed problem in add_elim_realizer which caused bound variables to
berghofe
parents: 13725
diff changeset
   424
      (((((elim, elimR), intrs), case_thms), case_name), dummy) thy =
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   425
      let
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   426
        val (prem :: prems) = prems_of elim;
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   427
        fun reorder1 (p, (_, intr)) =
33244
db230399f890 Datatype.read_typ: standard argument order;
wenzelm
parents: 33171
diff changeset
   428
          fold (fn ((s, _), T) => Logic.all (Free (s, T)))
db230399f890 Datatype.read_typ: standard argument order;
wenzelm
parents: 33171
diff changeset
   429
            (subtract (op =) params' (Term.add_vars (prop_of intr) []))
db230399f890 Datatype.read_typ: standard argument order;
wenzelm
parents: 33171
diff changeset
   430
            (strip_all p);
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   431
        fun reorder2 ((ivs, intr), i) =
33040
cffdb7b28498 removed old-style \ and \\ infixes
haftmann
parents: 32952
diff changeset
   432
          let val fs = subtract (op =) params' (Term.add_vars (prop_of intr) [])
33244
db230399f890 Datatype.read_typ: standard argument order;
wenzelm
parents: 33171
diff changeset
   433
          in fold (lambda o Var) fs (list_comb (Bound (i + length ivs), ivs)) end;
13921
69c627b6b28d Fixed problem in add_elim_realizer which caused bound variables to
berghofe
parents: 13725
diff changeset
   434
        val p = Logic.list_implies
69c627b6b28d Fixed problem in add_elim_realizer which caused bound variables to
berghofe
parents: 13725
diff changeset
   435
          (map reorder1 (prems ~~ intrs) @ [prem], concl_of elim);
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   436
        val T' = Extraction.etype_of thy (vs @ Ps) [] p;
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   437
        val T = if dummy then (HOLogic.unitT --> body_type T') --> T' else T';
13921
69c627b6b28d Fixed problem in add_elim_realizer which caused bound variables to
berghofe
parents: 13725
diff changeset
   438
        val Ts = map (Extraction.etype_of thy (vs @ Ps) []) (prems_of elim);
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   439
        val r = if null Ps then Extraction.nullt
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   440
          else list_abs (map (pair "x") Ts, list_comb (Const (case_name, T),
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   441
            (if dummy then
35364
b8c62d60195c more antiquotations;
wenzelm
parents: 33968
diff changeset
   442
               [Abs ("x", HOLogic.unitT, Const (@{const_name default}, body_type T))]
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   443
             else []) @
13921
69c627b6b28d Fixed problem in add_elim_realizer which caused bound variables to
berghofe
parents: 13725
diff changeset
   444
            map reorder2 (intrs ~~ (length prems - 1 downto 0)) @
69c627b6b28d Fixed problem in add_elim_realizer which caused bound variables to
berghofe
parents: 13725
diff changeset
   445
            [Bound (length prems)]));
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   446
        val rlz = Extraction.realizes_of thy (vs @ Ps) r (prop_of elim);
37233
b78f31ca4675 Adapted to new format of proof terms containing explicit proofs of class membership.
berghofe
parents: 36945
diff changeset
   447
        val rlz' = attach_typeS (strip_all (Logic.unvarify_global rlz));
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   448
        val rews = map mk_meta_eq case_thms;
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   449
        val thm = Goal.prove_global thy []
26711
3a478bfa1650 prove_global: pass context;
wenzelm
parents: 26663
diff changeset
   450
          (Logic.strip_imp_prems rlz') (Logic.strip_imp_concl rlz') (fn {prems, ...} => EVERY
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   451
          [cut_facts_tac [hd prems] 1,
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   452
           etac elimR 1,
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   453
           ALLGOALS (asm_simp_tac HOL_basic_ss),
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   454
           rewrite_goals_tac rews,
35625
9c818cab0dd0 modernized structure Object_Logic;
wenzelm
parents: 35402
diff changeset
   455
           REPEAT ((resolve_tac prems THEN_ALL_NEW (Object_Logic.atomize_prems_tac THEN'
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   456
             DEPTH_SOLVE_1 o FIRST' [atac, etac allE, etac impE])) 1)]);
30435
e62d6ecab6ad explicit Binding.qualified_name -- prevents implicitly qualified bstring;
wenzelm
parents: 30364
diff changeset
   457
        val (thm', thy') = PureThy.store_thm (Binding.qualified_name (space_implode "_"
29579
cb520b766e00 binding replaces bstring
haftmann
parents: 29389
diff changeset
   458
          (name_of_thm elim :: vs @ Ps @ ["correctness"])), thm) thy
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   459
      in
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   460
        Extraction.add_realizers_i
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   461
          [mk_realizer thy' (vs @ Ps) (name_of_thm elim, elim, thm', rlz, r)] thy'
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   462
      end;
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   463
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   464
    (** add realizers to theory **)
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   465
33244
db230399f890 Datatype.read_typ: standard argument order;
wenzelm
parents: 33171
diff changeset
   466
    val thy4 = fold add_ind_realizer (subsets Ps) thy3;
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   467
    val thy5 = Extraction.add_realizers_i
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   468
      (map (mk_realizer thy4 vs) (map (fn (((rule, rrule), rlz), c) =>
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   469
         (name_of_thm rule, rule, rrule, rlz,
33040
cffdb7b28498 removed old-style \ and \\ infixes
haftmann
parents: 32952
diff changeset
   470
            list_comb (c, map Var (subtract (op =) params' (rev (Term.add_vars (prop_of rule) []))))))
32952
aeb1e44fbc19 replaced String.concat by implode;
wenzelm
parents: 32131
diff changeset
   471
              (maps snd rss ~~ #intrs ind_info ~~ rintrs ~~ flat constrss))) thy4;
aeb1e44fbc19 replaced String.concat by implode;
wenzelm
parents: 32131
diff changeset
   472
    val elimps = map_filter (fn ((s, intrs), p) =>
36692
54b64d4ad524 farewell to old-style mem infixes -- type inference in situations with mem_int and mem_string should provide enough information to resolve the type of (op =)
haftmann
parents: 36610
diff changeset
   473
      if member (op =) rsets s then SOME (p, intrs) else NONE)
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   474
        (rss' ~~ (elims ~~ #elims ind_info));
33244
db230399f890 Datatype.read_typ: standard argument order;
wenzelm
parents: 33171
diff changeset
   475
    val thy6 =
db230399f890 Datatype.read_typ: standard argument order;
wenzelm
parents: 33171
diff changeset
   476
      fold (fn p as (((((elim, _), _), _), _), _) =>
db230399f890 Datatype.read_typ: standard argument order;
wenzelm
parents: 33171
diff changeset
   477
        add_elim_realizer [] p #>
db230399f890 Datatype.read_typ: standard argument order;
wenzelm
parents: 33171
diff changeset
   478
        add_elim_realizer [fst (fst (dest_Var (HOLogic.dest_Trueprop (concl_of elim))))] p)
db230399f890 Datatype.read_typ: standard argument order;
wenzelm
parents: 33171
diff changeset
   479
      (elimps ~~ case_thms ~~ case_names ~~ dummies) thy5;
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   480
24712
64ed05609568 proper Sign operations instead of Theory aliases;
wenzelm
parents: 24157
diff changeset
   481
  in Sign.restore_naming thy thy6 end;
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   482
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   483
fun add_ind_realizers name rsets thy =
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   484
  let
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   485
    val (_, {intrs, induct, raw_induct, elims, ...}) =
36610
bafd82950e24 renamed ProofContext.init to ProofContext.init_global to emphasize that this is not the real thing;
wenzelm
parents: 36043
diff changeset
   486
      Inductive.the_inductive (ProofContext.init_global thy) name;
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   487
    val vss = sort (int_ord o pairself length)
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   488
      (subsets (map fst (relevant_vars (concl_of (hd intrs)))))
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   489
  in
37233
b78f31ca4675 Adapted to new format of proof terms containing explicit proofs of class membership.
berghofe
parents: 36945
diff changeset
   490
    fold_rev (add_ind_realizer rsets intrs induct raw_induct elims) vss thy
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   491
  end
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   492
20897
3f8d2834b2c4 attribute: Context.mapping;
wenzelm
parents: 20071
diff changeset
   493
fun rlz_attrib arg = Thm.declaration_attribute (fn thm => Context.mapping
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   494
  let
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   495
    fun err () = error "ind_realizer: bad rule";
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   496
    val sets =
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   497
      (case HOLogic.dest_conj (HOLogic.dest_Trueprop (concl_of thm)) of
22271
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   498
           [_] => [pred_of (HOLogic.dest_Trueprop (hd (prems_of thm)))]
51a80e238b29 Adapted to new inductive definition package.
berghofe
parents: 21858
diff changeset
   499
         | xs => map (pred_of o fst o HOLogic.dest_imp) xs)
15570
8d8c70b41bab Move towards standard functions.
skalberg
parents: 15531
diff changeset
   500
         handle TERM _ => err () | Empty => err ();
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   501
  in 
18728
6790126ab5f6 simplified type attribute;
wenzelm
parents: 18708
diff changeset
   502
    add_ind_realizers (hd sets)
6790126ab5f6 simplified type attribute;
wenzelm
parents: 18708
diff changeset
   503
      (case arg of
15531
08c8dad8e399 Deleted Library.option type.
skalberg
parents: 14981
diff changeset
   504
        NONE => sets | SOME NONE => []
33040
cffdb7b28498 removed old-style \ and \\ infixes
haftmann
parents: 32952
diff changeset
   505
      | SOME (SOME sets') => subtract (op =) sets' sets)
20897
3f8d2834b2c4 attribute: Context.mapping;
wenzelm
parents: 20071
diff changeset
   506
  end I);
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   507
18708
4b3dadb4fe33 setup: theory -> theory;
wenzelm
parents: 18358
diff changeset
   508
val setup =
30722
623d4831c8cf simplified attribute and method setup: eliminating bottom-up styles makes it easier to keep things in one place, and also SML/NJ happy;
wenzelm
parents: 30528
diff changeset
   509
  Attrib.setup @{binding ind_realizer}
623d4831c8cf simplified attribute and method setup: eliminating bottom-up styles makes it easier to keep things in one place, and also SML/NJ happy;
wenzelm
parents: 30528
diff changeset
   510
    ((Scan.option (Scan.lift (Args.$$$ "irrelevant") |--
35402
115a5a95710a clarified @{const_name} vs. @{const_abbrev};
wenzelm
parents: 35364
diff changeset
   511
      Scan.option (Scan.lift (Args.colon) |-- Scan.repeat1 (Args.const true)))) >> rlz_attrib)
30722
623d4831c8cf simplified attribute and method setup: eliminating bottom-up styles makes it easier to keep things in one place, and also SML/NJ happy;
wenzelm
parents: 30528
diff changeset
   512
    "add realizers for inductive set";
13710
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   513
75bec2c1bfd5 New package for constructing realizers for introduction and elimination
berghofe
parents:
diff changeset
   514
end;
15706
bc264e730103 *** MESSAGE REFERS TO PREVIOUS VERSION ***
wenzelm
parents: 15703
diff changeset
   515