src/HOL/Tools/BNF/bnf_fp_n2m.ML
author blanchet
Wed Apr 23 10:23:27 2014 +0200 (2014-04-23)
changeset 56650 1f9ab71d43a5
parent 56640 0a35354137a5
child 57303 498a62e65f5f
permissions -rw-r--r--
no need to make 'size' generation an interpretation -- overkill
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(*  Title:      HOL/Tools/BNF/bnf_fp_n2m.ML
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    Author:     Dmitriy Traytel, TU Muenchen
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    Copyright   2013
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Flattening of nested to mutual (co)recursion.
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*)
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signature BNF_FP_N2M =
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sig
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  val construct_mutualized_fp: BNF_Util.fp_kind -> int list -> typ list ->
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    BNF_FP_Util.fp_sugar list -> binding list -> (string * sort) list ->
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    typ list * typ list list -> BNF_Def.bnf list -> BNF_Comp.absT_info list -> local_theory ->
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    BNF_FP_Util.fp_result * local_theory
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end;
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structure BNF_FP_N2M : BNF_FP_N2M =
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struct
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open BNF_Def
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open BNF_Util
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open BNF_Comp
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open BNF_FP_Util
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open BNF_FP_Def_Sugar
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open BNF_Tactics
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open BNF_FP_N2M_Tactics
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fun force_typ ctxt T =
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  Term.map_types Type_Infer.paramify_vars
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  #> Type.constraint T
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  #> Syntax.check_term ctxt
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  #> singleton (Variable.polymorphic ctxt);
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fun mk_prod_map f g =
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  let
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    val ((fAT, fBT), fT) = `dest_funT (fastype_of f);
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    val ((gAT, gBT), gT) = `dest_funT (fastype_of g);
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  in
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    Const (@{const_name map_prod},
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      fT --> gT --> HOLogic.mk_prodT (fAT, gAT) --> HOLogic.mk_prodT (fBT, gBT)) $ f $ g
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  end;
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fun mk_map_sum f g =
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  let
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    val ((fAT, fBT), fT) = `dest_funT (fastype_of f);
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    val ((gAT, gBT), gT) = `dest_funT (fastype_of g);
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  in
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    Const (@{const_name map_sum}, fT --> gT --> mk_sumT (fAT, gAT) --> mk_sumT (fBT, gBT)) $ f $ g
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  end;
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fun construct_mutualized_fp fp cliques fpTs (fp_sugars : fp_sugar list) bs resBs (resDs, Dss) bnfs
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    (absT_infos : absT_info list) lthy =
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  let
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    fun of_fp_res get =
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      map (fn {fp_res, fp_res_index, ...} => nth (get fp_res) fp_res_index) fp_sugars;
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    fun mk_co_algT T U = case_fp fp (T --> U) (U --> T);
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    fun co_swap pair = case_fp fp I swap pair;
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    val mk_co_comp = HOLogic.mk_comp o co_swap;
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    val co_productC = BNF_FP_Rec_Sugar_Util.case_fp fp @{type_name prod} @{type_name sum};
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    val dest_co_algT = co_swap o dest_funT;
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    val co_alg_argT = case_fp fp range_type domain_type;
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    val co_alg_funT = case_fp fp domain_type range_type;
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    val mk_co_product = curry (case_fp fp mk_convol mk_case_sum);
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    val mk_map_co_product = case_fp fp mk_prod_map mk_map_sum;
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    val co_proj1_const = case_fp fp (fst_const o fst) (uncurry Inl_const o dest_sumT o snd);
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    val mk_co_productT = curry (case_fp fp HOLogic.mk_prodT mk_sumT);
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    val dest_co_productT = case_fp fp HOLogic.dest_prodT dest_sumT;
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    val rewrite_comp_comp = case_fp fp @{thm rewriteL_comp_comp} @{thm rewriteR_comp_comp};
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    val fp_absT_infos = map #absT_info fp_sugars;
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    val fp_bnfs = of_fp_res #bnfs;
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    val pre_bnfs = map #pre_bnf fp_sugars;
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    val nesty_bnfss = map (fn sugar => #nested_bnfs sugar @ #nesting_bnfs sugar) fp_sugars;
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    val fp_nesty_bnfss = fp_bnfs :: nesty_bnfss;
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    val fp_nesty_bnfs = distinct (op = o pairself T_of_bnf) (flat fp_nesty_bnfss);
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    val fp_absTs = map #absT fp_absT_infos;
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    val fp_repTs = map #repT fp_absT_infos;
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    val fp_abss = map #abs fp_absT_infos;
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    val fp_reps = map #rep fp_absT_infos;
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    val fp_type_definitions = map #type_definition fp_absT_infos;
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    val absTs = map #absT absT_infos;
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    val repTs = map #repT absT_infos;
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    val absTs' = map (Logic.type_map (singleton (Variable.polymorphic lthy))) absTs;
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    val repTs' = map (Logic.type_map (singleton (Variable.polymorphic lthy))) repTs;
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    val abss = map #abs absT_infos;
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    val reps = map #rep absT_infos;
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    val abs_inverses = map #abs_inverse absT_infos;
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    val type_definitions = map #type_definition absT_infos;
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    val n = length bnfs;
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    val deads = fold (union (op =)) Dss resDs;
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    val As = subtract (op =) deads (map TFree resBs);
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    val names_lthy = fold Variable.declare_typ (As @ deads) lthy;
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    val m = length As;
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    val live = m + n;
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    val ((Xs, Bs), names_lthy) = names_lthy
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      |> mk_TFrees n
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      ||>> mk_TFrees m;
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    val allAs = As @ Xs;
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    val allBs = Bs @ Xs;
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    val phiTs = map2 mk_pred2T As Bs;
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    val thetaBs = As ~~ Bs;
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    val fpTs' = map (Term.typ_subst_atomic thetaBs) fpTs;
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    val fold_thetaAs = Xs ~~ fpTs;
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    val fold_thetaBs = Xs ~~ fpTs';
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    val rec_theta = Xs ~~ map2 mk_co_productT fpTs Xs;
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    val pre_phiTs = map2 mk_pred2T fpTs fpTs';
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    val ((ctors, dtors), (xtor's, xtors)) =
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      let
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        val ctors = map2 (force_typ names_lthy o (fn T => dummyT --> T)) fpTs (of_fp_res #ctors);
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        val dtors = map2 (force_typ names_lthy o (fn T => T --> dummyT)) fpTs (of_fp_res #dtors);
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      in
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        ((ctors, dtors), `(map (Term.subst_atomic_types thetaBs)) (case_fp fp ctors dtors))
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      end;
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    val absATs = map (domain_type o fastype_of) ctors;
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    val absBTs = map (Term.typ_subst_atomic thetaBs) absATs;
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    val xTs = map (domain_type o fastype_of) xtors;
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    val yTs = map (domain_type o fastype_of) xtor's;
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    val absAs = map3 (fn Ds => mk_abs o mk_T_of_bnf Ds allAs) Dss bnfs abss;
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    val absBs = map3 (fn Ds => mk_abs o mk_T_of_bnf Ds allBs) Dss bnfs abss;
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    val fp_repAs = map2 mk_rep absATs fp_reps;
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    val fp_repBs = map2 mk_rep absBTs fp_reps;
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    val (((((phis, phis'), pre_phis), xs), ys), names_lthy) = names_lthy
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      |> mk_Frees' "R" phiTs
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      ||>> mk_Frees "S" pre_phiTs
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      ||>> mk_Frees "x" xTs
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      ||>> mk_Frees "y" yTs;
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    val rels =
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      let
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        fun find_rel T As Bs = fp_nesty_bnfss
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          |> map (filter_out (curry (op = o pairself name_of_bnf) BNF_Comp.DEADID_bnf))
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          |> get_first (find_first (fn bnf => Type.could_unify (T_of_bnf bnf, T)))
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          |> Option.map (fn bnf =>
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            let val live = live_of_bnf bnf;
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            in (mk_rel live As Bs (rel_of_bnf bnf), live) end)
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          |> the_default (HOLogic.eq_const T, 0);
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        fun mk_rel (T as Type (_, Ts)) (Type (_, Us)) =
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              let
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                val (rel, live) = find_rel T Ts Us;
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                val (Ts', Us') = fastype_of rel |> strip_typeN live |> fst |> map_split dest_pred2T;
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                val rels = map2 mk_rel Ts' Us';
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              in
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                Term.list_comb (rel, rels)
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              end
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          | mk_rel (T as TFree _) _ = (nth phis (find_index (curry op = T) As)
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              handle General.Subscript => HOLogic.eq_const T)
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          | mk_rel _ _ = raise Fail "fpTs contains schematic type variables";
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      in
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        map2 (fold_rev Term.absfree phis' oo mk_rel) fpTs fpTs'
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      end;
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    val pre_rels = map2 (fn Ds => mk_rel_of_bnf Ds (As @ fpTs) (Bs @ fpTs')) Dss bnfs;
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    val rel_unfolds = maps (no_refl o single o rel_def_of_bnf) pre_bnfs;
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    val rel_xtor_co_inducts = of_fp_res (split_conj_thm o #rel_xtor_co_induct_thm)
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      |> map (unfold_thms lthy (id_apply :: rel_unfolds));
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    val rel_defs = map rel_def_of_bnf bnfs;
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    val rel_monos = map rel_mono_of_bnf bnfs;
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    fun cast castA castB pre_rel =
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      let
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        val castAB = mk_vimage2p (Term.subst_atomic_types fold_thetaAs castA)
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          (Term.subst_atomic_types fold_thetaBs castB);
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      in
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        fold_rev (fold_rev Term.absdummy) [phiTs, pre_phiTs]
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          (castAB $ Term.list_comb (pre_rel, map Bound (live - 1 downto 0)))
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      end;
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    val castAs = map2 (curry HOLogic.mk_comp) absAs fp_repAs;
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    val castBs = map2 (curry HOLogic.mk_comp) absBs fp_repBs;
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    val rel_xtor_co_induct_thm =
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      mk_rel_xtor_co_induct_thm fp (map3 cast castAs castBs pre_rels) pre_phis rels phis xs ys xtors
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        xtor's (mk_rel_xtor_co_induct_tactic fp abs_inverses rel_xtor_co_inducts rel_defs rel_monos)
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        lthy;
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    val rel_eqs = no_refl (map rel_eq_of_bnf fp_nesty_bnfs);
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    val map_id0s = no_refl (map map_id0_of_bnf bnfs);
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    val xtor_co_induct_thm =
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      (case fp of
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        Least_FP =>
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          let
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            val (Ps, names_lthy) = names_lthy
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              |> mk_Frees "P" (map (fn T => T --> HOLogic.boolT) fpTs);
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            fun mk_Grp_id P =
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              let val T = domain_type (fastype_of P);
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              in mk_Grp (HOLogic.Collect_const T $ P) (HOLogic.id_const T) end;
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            val cts = map (SOME o certify lthy) (map HOLogic.eq_const As @ map mk_Grp_id Ps);
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            fun mk_fp_type_copy_thms thm = map (curry op RS thm)
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              @{thms type_copy_Abs_o_Rep type_copy_vimage2p_Grp_Rep};
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            fun mk_type_copy_thms thm = map (curry op RS thm)
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              @{thms type_copy_Rep_o_Abs type_copy_vimage2p_Grp_Abs};
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          in
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            cterm_instantiate_pos cts rel_xtor_co_induct_thm
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            |> singleton (Proof_Context.export names_lthy lthy)
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            |> unfold_thms lthy (@{thms eq_le_Grp_id_iff all_simps(1,2)[symmetric]} @ rel_eqs)
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            |> funpow n (fn thm => thm RS spec)
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            |> unfold_thms lthy (@{thm eq_alt} :: map rel_Grp_of_bnf bnfs @ map_id0s)
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            |> unfold_thms lthy (@{thms vimage2p_id vimage2p_comp comp_apply comp_id
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               Grp_id_mono_subst eqTrueI[OF subset_UNIV] simp_thms(22)} @
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               maps mk_fp_type_copy_thms fp_type_definitions @
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               maps mk_type_copy_thms type_definitions)
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            |> unfold_thms lthy @{thms subset_iff mem_Collect_eq
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               atomize_conjL[symmetric] atomize_all[symmetric] atomize_imp[symmetric]}
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          end
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      | Greatest_FP =>
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          let
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            val cts = NONE :: map (SOME o certify lthy) (map HOLogic.eq_const As);
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          in
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            cterm_instantiate_pos cts rel_xtor_co_induct_thm
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            |> unfold_thms lthy (@{thms le_fun_def le_bool_def all_simps(1,2)[symmetric]} @ rel_eqs)
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            |> funpow (2 * n) (fn thm => thm RS spec)
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            |> Conv.fconv_rule (Object_Logic.atomize lthy)
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            |> funpow n (fn thm => thm RS mp)
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          end);
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    val fold_preTs = map2 (fn Ds => mk_T_of_bnf Ds allAs) Dss bnfs;
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    val rec_preTs = map (Term.typ_subst_atomic rec_theta) fold_preTs;
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    val rec_strTs = map2 mk_co_algT rec_preTs Xs;
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    val resTs = map2 mk_co_algT fpTs Xs;
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    val ((rec_strs, rec_strs'), names_lthy) = names_lthy
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      |> mk_Frees' "s" rec_strTs;
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    val co_recs = of_fp_res #xtor_co_recs;
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    val ns = map (length o #Ts o #fp_res) fp_sugars;
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    fun substT rho (Type (@{type_name fun}, [T, U])) = substT rho T --> substT rho U
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      | substT rho (Type (s, Ts)) = Type (s, map (typ_subst_nonatomic rho) Ts)
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      | substT _ T = T;
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    val typ_subst_nonatomic_sorted = fold_rev (typ_subst_nonatomic o single);
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    fun foldT_of_recT recT =
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      let
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        val ((FTXs, Xs), TX) = strip_fun_type recT |>> map_split dest_co_algT;
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        fun subst (Type (C, Ts as [_, X])) =
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            if C = co_productC andalso member op = Xs X then X else Type (C, map subst Ts)
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          | subst (Type (C, Ts)) = Type (C, map subst Ts)
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          | subst T = T;
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      in
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        map2 (mk_co_algT o subst) FTXs Xs ---> TX
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      end;
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    fun force_rec i TU TU_rec raw_rec =
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      let
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        val thy = Proof_Context.theory_of lthy;
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        val approx_rec = raw_rec
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          |> force_typ names_lthy (replicate (nth ns i) dummyT ---> TU_rec);
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        val subst = Term.typ_subst_atomic fold_thetaAs;
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        fun mk_fp_absT_repT fp_repT fp_absT = mk_absT thy fp_repT fp_absT ooo mk_repT;
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        val mk_fp_absT_repTs = map5 mk_fp_absT_repT fp_repTs fp_absTs absTs repTs;
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        val fold_preTs' = mk_fp_absT_repTs (map subst fold_preTs);
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        val fold_pre_deads_only_Ts =
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          map (typ_subst_nonatomic_sorted (map (rpair dummyT) (As @ fpTs))) fold_preTs';
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        val (clique, TUs) =
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          map_split dest_co_algT (binder_fun_types (foldT_of_recT (fastype_of approx_rec)))
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          |>> map subst
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   278
          |> `(fn (_, Ys) =>
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   279
            nth cliques (find_index (fn X => X = the (find_first (can dest_TFree) Ys)) Xs))
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   280
          ||> uncurry (map2 mk_co_algT);
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   281
        val cands = cliques ~~ map2 mk_co_algT fold_preTs' Xs;
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   282
        val js = find_indices (fn ((cl, cand), TU) =>
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   283
          cl = clique andalso Type.could_unify (TU, cand)) TUs cands;
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        val Tpats = map (fn j => mk_co_algT (nth fold_pre_deads_only_Ts j) (nth Xs j)) js;
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   285
      in
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   286
        force_typ names_lthy (Tpats ---> TU) raw_rec
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   287
      end;
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   288
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   289
    fun mk_co_comp_abs_rep fp_absT absT fp_abs fp_rep abs rep t =
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   290
      case_fp fp (HOLogic.mk_comp (HOLogic.mk_comp (t, mk_abs absT abs), mk_rep fp_absT fp_rep))
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   291
        (HOLogic.mk_comp (mk_abs fp_absT fp_abs, HOLogic.mk_comp (mk_rep absT rep, t)));
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   292
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   293
    fun mk_rec b_opt recs lthy TU =
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   294
      let
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   295
        val thy = Proof_Context.theory_of lthy;
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   296
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   297
        val x = co_alg_argT TU;
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   298
        val i = find_index (fn T => x = T) Xs;
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   299
        val TUrec =
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   300
          (case find_first (fn f => body_fun_type (fastype_of f) = TU) recs of
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   301
            NONE => 
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   302
              force_rec i TU
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   303
                (TU |> is_none b_opt ? substT (map2 mk_co_productT fpTs Xs ~~ Xs)) (nth co_recs i)
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   304
          | SOME f => f);
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   305
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   306
        val TUs = binder_fun_types (fastype_of TUrec);
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   307
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   308
        fun mk_s TU' =
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   309
          let
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   310
            fun mk_absT_fp_repT repT absT = mk_absT thy repT absT ooo mk_repT;
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   311
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   312
            val i = find_index (fn T => co_alg_argT TU' = T) Xs;
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   313
            val fp_abs = nth fp_abss i;
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   314
            val fp_rep = nth fp_reps i;
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   315
            val abs = nth abss i;
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   316
            val rep = nth reps i;
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   317
            val sF = co_alg_funT TU';
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   318
            val sF' =
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   319
              mk_absT_fp_repT (nth repTs' i) (nth absTs' i) (nth fp_absTs i) (nth fp_repTs i) sF
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   320
                handle Term.TYPE _ => sF;
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   321
            val F = nth rec_preTs i;
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   322
            val s = nth rec_strs i;
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   323
          in
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   324
            if sF = F then s
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   325
            else if sF' = F then mk_co_comp_abs_rep sF sF' fp_abs fp_rep abs rep s
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   326
            else
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   327
              let
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   328
                val smapT = replicate live dummyT ---> mk_co_algT sF' F;
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   329
                fun hidden_to_unit t =
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   330
                  Term.subst_TVars (map (rpair HOLogic.unitT) (Term.add_tvar_names t [])) t;
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   331
                val smap = map_of_bnf (nth bnfs i)
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   332
                  |> force_typ names_lthy smapT
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   333
                  |> hidden_to_unit;
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   334
                val smap_argTs = strip_typeN live (fastype_of smap) |> fst;
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   335
                fun mk_smap_arg TU =
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   336
                  (if domain_type TU = range_type TU then
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   337
                    HOLogic.id_const (domain_type TU)
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   338
                  else
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   339
                    let
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   340
                      val (TY, (U, X)) = TU |> dest_co_algT ||> dest_co_productT;
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   341
                      val T = mk_co_algT TY U;
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   342
                    in
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   343
                      (case try (force_typ names_lthy T o build_map lthy co_proj1_const o dest_funT) T of
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   344
                        SOME f => mk_co_product f
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   345
                          (fst (fst (mk_rec NONE recs lthy (mk_co_algT TY X))))
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   346
                      | NONE => mk_map_co_product
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   347
                          (build_map lthy co_proj1_const
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   348
                            (dest_funT (mk_co_algT (dest_co_productT TY |> fst) U)))
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   349
                          (HOLogic.id_const X))
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   350
                    end)
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   351
                val smap_args = map mk_smap_arg smap_argTs;
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   352
              in
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   353
                mk_co_comp_abs_rep sF sF' fp_abs fp_rep abs rep
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   354
                  (mk_co_comp (s, Term.list_comb (smap, smap_args)))
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   355
              end
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   356
          end;
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   357
        val t = Term.list_comb (TUrec, map mk_s TUs);
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   358
      in
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   359
        (case b_opt of
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   360
          NONE => ((t, Drule.dummy_thm), lthy)
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   361
        | SOME b => Local_Theory.define ((b, NoSyn), ((Binding.conceal (Thm.def_binding b), []),
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   362
            fold_rev Term.absfree rec_strs' t)) lthy |>> apsnd snd)
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   363
      end;
blanchet@53303
   364
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   365
    val recN = case_fp fp ctor_recN dtor_corecN;
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   366
    fun mk_recs lthy =
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   367
      fold2 (fn TU => fn b => fn ((recs, defs), lthy) =>
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   368
        mk_rec (SOME b) recs lthy TU |>> (fn (f, d) => (f :: recs, d :: defs)))
blanchet@55894
   369
      resTs (map (Binding.suffix_name ("_" ^ recN)) bs) (([], []), lthy)
blanchet@53303
   370
      |>> apfst rev o apsnd rev;
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   371
    val ((raw_co_recs, raw_co_rec_defs), (lthy, raw_lthy)) = lthy
blanchet@55894
   372
      |> mk_recs
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   373
      ||> `Local_Theory.restore;
blanchet@53303
   374
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   375
    val phi = Proof_Context.export_morphism raw_lthy lthy;
blanchet@53303
   376
blanchet@53303
   377
    val co_recs = map (Morphism.term phi) raw_co_recs;
blanchet@53303
   378
traytel@56486
   379
    val fp_rec_o_maps = of_fp_res #xtor_co_rec_o_map_thms
traytel@56486
   380
      |> maps (fn thm => [thm, thm RS rewrite_comp_comp]);
blanchet@55868
   381
blanchet@55894
   382
    val xtor_co_rec_thms =
blanchet@53303
   383
      let
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   384
        val recs = map (fn r => Term.list_comb (r, rec_strs)) raw_co_recs;
blanchet@53303
   385
        val rec_mapTs = co_swap (As @ fpTs, As @ map2 mk_co_productT fpTs Xs);
blanchet@53303
   386
        val pre_rec_maps =
blanchet@53303
   387
          map2 (fn Ds => fn bnf =>
blanchet@53303
   388
            Term.list_comb (uncurry (mk_map_of_bnf Ds) rec_mapTs bnf,
blanchet@53303
   389
              map HOLogic.id_const As @ map2 (mk_co_product o HOLogic.id_const) fpTs recs))
blanchet@53303
   390
          Dss bnfs;
blanchet@53303
   391
traytel@55803
   392
        fun mk_goals f xtor s smap fp_abs fp_rep abs rep =
traytel@55803
   393
          let
traytel@55803
   394
            val lhs = mk_co_comp (f, xtor);
traytel@55803
   395
            val rhs = mk_co_comp (s, smap);
traytel@55803
   396
          in
traytel@55803
   397
            HOLogic.mk_eq (lhs,
traytel@55803
   398
              mk_co_comp_abs_rep (co_alg_funT (fastype_of lhs)) (co_alg_funT (fastype_of rhs))
traytel@55803
   399
                fp_abs fp_rep abs rep rhs)
traytel@55803
   400
          end;
blanchet@53303
   401
blanchet@55894
   402
        val goals = map8 mk_goals recs xtors rec_strs pre_rec_maps fp_abss fp_reps abss reps;
blanchet@53303
   403
blanchet@53303
   404
        val pre_map_defs = no_refl (map map_def_of_bnf bnfs);
blanchet@53303
   405
        val fp_pre_map_defs = no_refl (map map_def_of_bnf pre_bnfs);
blanchet@53303
   406
traytel@55803
   407
        val unfold_map = map (unfold_thms lthy (id_apply :: pre_map_defs));
traytel@55803
   408
blanchet@55868
   409
        val fp_xtor_co_recs = map (mk_pointfree lthy) (of_fp_res #xtor_co_rec_thms);
blanchet@53303
   410
blanchet@55966
   411
        val fold_thms = case_fp fp @{thm comp_assoc} @{thm comp_assoc[symmetric]} ::
blanchet@55932
   412
          map (fn thm => thm RS rewrite_comp_comp) @{thms map_prod.comp map_sum.comp} @
blanchet@55932
   413
          @{thms id_apply comp_id id_comp map_prod.comp map_prod.id map_sum.comp map_sum.id};
blanchet@55966
   414
        val rec_thms = fold_thms @ case_fp fp
blanchet@55932
   415
          @{thms fst_convol map_prod_o_convol convol_o}
blanchet@55931
   416
          @{thms case_sum_o_inj(1) case_sum_o_map_sum o_case_sum};
traytel@55803
   417
traytel@55810
   418
        val eq_thm_prop_untyped = Term.aconv_untyped o pairself Thm.full_prop_of;
traytel@55803
   419
blanchet@53303
   420
        val map_thms = no_refl (maps (fn bnf =>
traytel@55803
   421
           let val map_comp0 = map_comp0_of_bnf bnf RS sym
traytel@55803
   422
           in [map_comp0, map_comp0 RS rewrite_comp_comp, map_id0_of_bnf bnf] end) fp_nesty_bnfs) @
blanchet@55966
   423
          remove eq_thm_prop_untyped (case_fp fp @{thm comp_assoc[symmetric]} @{thm comp_assoc})
traytel@55803
   424
          (map2 (fn thm => fn bnf =>
traytel@55803
   425
            @{thm type_copy_map_comp0_undo} OF
traytel@55803
   426
              (replicate 3 thm @ unfold_map [map_comp0_of_bnf bnf]) RS
traytel@55803
   427
              rewrite_comp_comp)
traytel@55803
   428
          type_definitions bnfs);
traytel@55803
   429
traytel@55803
   430
        fun mk_Rep_o_Abs thm = thm RS @{thm type_copy_Rep_o_Abs} RS rewrite_comp_comp;
traytel@55803
   431
traytel@55803
   432
        val fp_Rep_o_Abss = map mk_Rep_o_Abs fp_type_definitions;
traytel@55803
   433
        val Rep_o_Abss = map mk_Rep_o_Abs type_definitions;
blanchet@53303
   434
blanchet@55894
   435
        fun tac {context = ctxt, prems = _} =
blanchet@55894
   436
          unfold_thms_tac ctxt (flat [rec_thms, raw_co_rec_defs, pre_map_defs, fp_pre_map_defs,
blanchet@55894
   437
            fp_xtor_co_recs, fp_rec_o_maps, map_thms, fp_Rep_o_Abss, Rep_o_Abss]) THEN
blanchet@53303
   438
          CONJ_WRAP (K (HEADGOAL (rtac refl))) bnfs;
blanchet@53303
   439
      in
blanchet@55894
   440
        Library.foldr1 HOLogic.mk_conj goals
blanchet@55894
   441
        |> HOLogic.mk_Trueprop
blanchet@55894
   442
        |> fold_rev Logic.all rec_strs
blanchet@55894
   443
        |> (fn goal => Goal.prove_sorry raw_lthy [] [] goal tac)
blanchet@55894
   444
        |> Thm.close_derivation
blanchet@55894
   445
        |> Morphism.thm phi
blanchet@55894
   446
        |> split_conj_thm
blanchet@55894
   447
        |> map (fn thm => thm RS @{thm comp_eq_dest})
blanchet@53303
   448
      end;
blanchet@53303
   449
blanchet@53303
   450
    (* These results are half broken. This is deliberate. We care only about those fields that are
blanchet@55531
   451
       used by "primrec", "primcorecursive", and "datatype_compat". *)
blanchet@53303
   452
    val fp_res =
blanchet@55894
   453
      ({Ts = fpTs, bnfs = of_fp_res #bnfs, dtors = dtors, ctors = ctors,
blanchet@55868
   454
        xtor_co_recs = co_recs, xtor_co_induct = xtor_co_induct_thm,
traytel@55803
   455
        dtor_ctors = of_fp_res #dtor_ctors (*too general types*),
traytel@55803
   456
        ctor_dtors = of_fp_res #ctor_dtors (*too general types*),
traytel@55803
   457
        ctor_injects = of_fp_res #ctor_injects (*too general types*),
traytel@55803
   458
        dtor_injects = of_fp_res #dtor_injects (*too general types*),
traytel@55803
   459
        xtor_map_thms = of_fp_res #xtor_map_thms (*too general types and terms*),
traytel@55803
   460
        xtor_set_thmss = of_fp_res #xtor_set_thmss (*too general types and terms*),
traytel@55803
   461
        xtor_rel_thms = of_fp_res #xtor_rel_thms (*too general types and terms*),
blanchet@55868
   462
        xtor_co_rec_thms = xtor_co_rec_thms,
blanchet@55868
   463
        xtor_co_rec_o_map_thms = fp_rec_o_maps (*theorems about old constants*),
blanchet@53303
   464
        rel_xtor_co_induct_thm = rel_xtor_co_induct_thm}
wenzelm@54740
   465
       |> morph_fp_result (Morphism.term_morphism "BNF" (singleton (Variable.polymorphic lthy))));
blanchet@53303
   466
  in
blanchet@53303
   467
    (fp_res, lthy)
blanchet@54242
   468
  end;
blanchet@53303
   469
blanchet@53303
   470
end;