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(* Title: HOL/Codatatype/Tools/bnf_fp_sugar.ML
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Author: Jasmin Blanchette, TU Muenchen
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Copyright 2012
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Sugar for constructing LFPs and GFPs.
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*)
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signature BNF_FP_SUGAR =
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sig
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(* TODO: programmatic interface *)
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end;
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structure BNF_FP_Sugar : BNF_FP_SUGAR =
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struct
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open BNF_Util
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open BNF_Wrap
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open BNF_FP_Util
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open BNF_LFP
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open BNF_GFP
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open BNF_FP_Sugar_Tactics
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val caseN = "case";
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val itersN = "iters";
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val recsN = "recs";
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fun split_list7 xs = (map #1 xs, map #2 xs, map #3 xs, map #4 xs, map #5 xs, map #6 xs, map #7 xs);
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fun retype_free (Free (s, _)) T = Free (s, T);
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fun flat_list_comb (f, xss) = fold (fn xs => fn t => Term.list_comb (t, xs)) xss f
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fun mk_tupled_fun x f xs = HOLogic.tupled_lambda x (Term.list_comb (f, xs));
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fun mk_uncurried_fun f xs = mk_tupled_fun (HOLogic.mk_tuple xs) f xs;
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fun mk_uncurried2_fun f xss =
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mk_tupled_fun (HOLogic.mk_tuple (map HOLogic.mk_tuple xss)) f (flat xss);
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fun cannot_merge_types () = error "Mutually recursive types must have the same type parameters";
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fun merge_type_arg_constrained ctxt (T, c) (T', c') =
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if T = T' then
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(case (c, c') of
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(_, NONE) => (T, c)
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| (NONE, _) => (T, c')
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| _ =>
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if c = c' then
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(T, c)
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else
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error ("Inconsistent sort constraints for type variable " ^
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quote (Syntax.string_of_typ ctxt T)))
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else
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cannot_merge_types ();
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fun merge_type_args_constrained ctxt (cAs, cAs') =
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if length cAs = length cAs' then map2 (merge_type_arg_constrained ctxt) cAs cAs'
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else cannot_merge_types ();
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fun type_args_constrained_of (((cAs, _), _), _) = cAs;
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val type_args_of = map fst o type_args_constrained_of;
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fun type_binder_of (((_, b), _), _) = b;
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fun mixfix_of ((_, mx), _) = mx;
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fun ctr_specs_of (_, ctr_specs) = ctr_specs;
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fun disc_of (((disc, _), _), _) = disc;
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fun ctr_of (((_, ctr), _), _) = ctr;
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fun args_of ((_, args), _) = args;
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fun ctr_mixfix_of (_, mx) = mx;
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fun prepare_datatype prepare_typ lfp specs fake_lthy no_defs_lthy =
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let
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val constrained_As =
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map (map (apfst (prepare_typ fake_lthy)) o type_args_constrained_of) specs
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|> Library.foldr1 (merge_type_args_constrained no_defs_lthy);
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val As = map fst constrained_As;
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val As' = map dest_TFree As;
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val _ = (case duplicates (op =) As of [] => ()
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| A :: _ => error ("Duplicate type parameter " ^
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quote (Syntax.string_of_typ no_defs_lthy A)));
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(* TODO: use sort constraints on type args *)
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val N = length specs;
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fun mk_fake_T b =
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Type (fst (Term.dest_Type (Proof_Context.read_type_name fake_lthy true (Binding.name_of b))),
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As);
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val bs = map type_binder_of specs;
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val fakeTs = map mk_fake_T bs;
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val mixfixes = map mixfix_of specs;
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val _ = (case duplicates Binding.eq_name bs of [] => ()
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| b :: _ => error ("Duplicate type name declaration " ^ quote (Binding.name_of b)));
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val ctr_specss = map ctr_specs_of specs;
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val disc_binderss = map (map disc_of) ctr_specss;
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val ctr_binderss = map (map ctr_of) ctr_specss;
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val ctr_argsss = map (map args_of) ctr_specss;
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val ctr_mixfixess = map (map ctr_mixfix_of) ctr_specss;
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val sel_bindersss = map (map (map fst)) ctr_argsss;
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val fake_ctr_Tsss = map (map (map (prepare_typ fake_lthy o snd))) ctr_argsss;
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val rhs_As' = fold (fold (fold Term.add_tfreesT)) fake_ctr_Tsss [];
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val _ = (case subtract (op =) As' rhs_As' of
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[] => ()
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| A' :: _ => error ("Extra type variables on rhs: " ^
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quote (Syntax.string_of_typ no_defs_lthy (TFree A'))));
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val ((Cs, Xs), _) =
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no_defs_lthy
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|> fold (fold (fn s => Variable.declare_typ (TFree (s, dummyS))) o type_args_of) specs
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|> mk_TFrees N
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||>> mk_TFrees N;
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fun eq_fpT (T as Type (s, Us)) (Type (s', Us')) =
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s = s' andalso (Us = Us' orelse error ("Illegal occurrence of recursive type " ^
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quote (Syntax.string_of_typ fake_lthy T)))
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| eq_fpT _ _ = false;
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fun freeze_fp (T as Type (s, Us)) =
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(case find_index (eq_fpT T) fakeTs of ~1 => Type (s, map freeze_fp Us) | j => nth Xs j)
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| freeze_fp T = T;
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val ctr_TsssXs = map (map (map freeze_fp)) fake_ctr_Tsss;
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val sum_prod_TsXs = map (mk_sumTN o map HOLogic.mk_tupleT) ctr_TsssXs;
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val eqs = map dest_TFree Xs ~~ sum_prod_TsXs;
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val (pre_map_defs, ((unfs0, flds0, fp_iters0, fp_recs0, unf_flds, fld_unfs, fld_injects,
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fp_iter_thms, fp_rec_thms), lthy)) =
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fp_bnf (if lfp then bnf_lfp else bnf_gfp) bs mixfixes As' eqs no_defs_lthy;
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val timer = time (Timer.startRealTimer ());
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fun mk_unf_or_fld get_T Ts t =
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let val Type (_, Ts0) = get_T (fastype_of t) in
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Term.subst_atomic_types (Ts0 ~~ Ts) t
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end;
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val mk_unf = mk_unf_or_fld domain_type;
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val mk_fld = mk_unf_or_fld range_type;
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val unfs = map (mk_unf As) unfs0;
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val flds = map (mk_fld As) flds0;
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val fpTs = map (domain_type o fastype_of) unfs;
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val is_fpT = member (op =) fpTs;
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val ctr_Tsss = map (map (map (Term.typ_subst_atomic (Xs ~~ fpTs)))) ctr_TsssXs;
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val ns = map length ctr_Tsss;
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val mss = map (map length) ctr_Tsss;
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val Css = map2 replicate ns Cs;
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fun mk_iter_like Ts Us c =
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let
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val (binders, body) = strip_type (fastype_of c);
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val (f_Us, prebody) = split_last binders;
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val Type (_, Ts0) = if lfp then prebody else body;
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val Us0 = distinct (op =) (map (if lfp then body_type else domain_type) f_Us);
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in
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Term.subst_atomic_types (Ts0 @ Us0 ~~ Ts @ Us) c
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end;
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val fp_iters as fp_iter1 :: _ = map (mk_iter_like As Cs) fp_iters0;
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val fp_recs as fp_rec1 :: _ = map (mk_iter_like As Cs) fp_recs0;
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val fp_iter_f_Ts = fst (split_last (binder_types (fastype_of fp_iter1)));
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val fp_rec_f_Ts = fst (split_last (binder_types (fastype_of fp_rec1)));
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fun dest_rec_pair (T as Type (@{type_name prod}, Us as [_, U])) =
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if member (op =) Cs U then Us else [T]
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| dest_rec_pair T = [T];
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val (((gss, g_Tss, ysss, y_Tsss), (hss, h_Tss, zssss, z_Tssss)),
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(cs, (qss, q_Tss, gsss, g_Tsss), ())) =
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if lfp then
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let
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val y_Tsss =
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map3 (fn n => fn ms => map2 dest_tupleT ms o dest_sumTN n o domain_type)
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ns mss fp_iter_f_Ts;
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val g_Tss = map2 (map2 (curry (op --->))) y_Tsss Css;
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val ((gss, ysss), _) =
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lthy
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|> mk_Freess "f" g_Tss
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||>> mk_Freesss "x" y_Tsss;
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val z_Tssss =
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map3 (fn n => fn ms => map2 (map dest_rec_pair oo dest_tupleT) ms o dest_sumTN n
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o domain_type) ns mss fp_rec_f_Ts;
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val h_Tss = map2 (map2 (fold_rev (curry (op --->)))) z_Tssss Css;
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blanchet@50223
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val hss = map2 (map2 retype_free) gss h_Tss;
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val (zssss, _) =
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lthy
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|> mk_Freessss "x" z_Tssss;
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in
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(((gss, g_Tss, ysss, y_Tsss), (hss, h_Tss, zssss, z_Tssss)),
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([], ([], [], [], []), ()))
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end
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else
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let
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val q_Tss =
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map2 (fn C => fn n => replicate (Int.max (0, n - 1)) (C --> HOLogic.boolT)) Cs ns;
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val g_Tsss =
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map4 (fn C => fn n => fn ms => map2 (map (curry (op -->) C) oo dest_tupleT) ms o
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dest_sumTN n o range_type) Cs ns mss fp_iter_f_Ts;
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blanchet@50225
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val (((c, qss), gsss), _) =
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lthy
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blanchet@50225
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|> yield_singleton (mk_Frees "c") dummyT
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||>> mk_Freess "p" q_Tss
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blanchet@50225
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||>> mk_Freesss "g" g_Tsss;
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blanchet@50225
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blanchet@50225
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val cs = map (retype_free c) Cs;
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blanchet@50225
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in
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blanchet@50225
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((([], [], [], []), ([], [], [], [])),
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blanchet@50225
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(cs, (qss, q_Tss, gsss, g_Tsss), ()))
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blanchet@50225
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end;
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blanchet@50225
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blanchet@50225
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fun pour_some_sugar_on_type ((((((((((((((b, fpT), C), fld), unf), fp_iter), fp_rec), fld_unf),
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blanchet@50225
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unf_fld), fld_inject), ctr_binders), ctr_mixfixes), ctr_Tss), disc_binders),
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blanchet@50225
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sel_binderss) no_defs_lthy =
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blanchet@50191
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let
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blanchet@50191
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val n = length ctr_Tss;
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blanchet@50136
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val ks = 1 upto n;
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blanchet@50136
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val ms = map length ctr_Tss;
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blanchet@50136
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blanchet@50216
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val unfT = domain_type (fastype_of fld);
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blanchet@50225
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val ctr_prod_Ts = map HOLogic.mk_tupleT ctr_Tss;
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blanchet@50149
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val case_Ts = map (fn Ts => Ts ---> C) ctr_Tss;
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blanchet@50139
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blanchet@50191
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val ((((u, v), fs), xss), _) =
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blanchet@50219
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no_defs_lthy
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blanchet@50216
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|> yield_singleton (mk_Frees "u") unfT
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blanchet@50216
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||>> yield_singleton (mk_Frees "v") fpT
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blanchet@50191
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||>> mk_Frees "f" case_Ts
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blanchet@50139
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||>> mk_Freess "x" ctr_Tss;
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blanchet@50136
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blanchet@50144
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val ctr_rhss =
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blanchet@50136
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map2 (fn k => fn xs =>
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blanchet@50225
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fold_rev Term.lambda xs (fld $ mk_InN ctr_prod_Ts (HOLogic.mk_tuple xs) k)) ks xss;
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blanchet@50136
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blanchet@50145
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val case_binder = Binding.suffix_name ("_" ^ caseN) b;
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blanchet@50144
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blanchet@50149
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val case_rhs =
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blanchet@50191
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fold_rev Term.lambda (fs @ [v]) (mk_sum_caseN (map2 mk_uncurried_fun fs xss) $ (unf $ v));
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blanchet@50144
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blanchet@50216
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val ((raw_case :: raw_ctrs, raw_case_def :: raw_ctr_defs), (lthy', lthy)) = no_defs_lthy
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blanchet@50184
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|> apfst split_list o fold_map3 (fn b => fn mx => fn rhs =>
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blanchet@50184
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Local_Theory.define ((b, mx), ((Thm.def_binding b, []), rhs)) #>> apsnd snd)
|
blanchet@50216
|
256 |
(case_binder :: ctr_binders) (NoSyn :: ctr_mixfixes) (case_rhs :: ctr_rhss)
|
blanchet@50136
|
257 |
||> `Local_Theory.restore;
|
blanchet@50136
|
258 |
|
blanchet@50136
|
259 |
(*transforms defined frees into consts (and more)*)
|
blanchet@50136
|
260 |
val phi = Proof_Context.export_morphism lthy lthy';
|
blanchet@50136
|
261 |
|
blanchet@50136
|
262 |
val ctr_defs = map (Morphism.thm phi) raw_ctr_defs;
|
blanchet@50145
|
263 |
val case_def = Morphism.thm phi raw_case_def;
|
blanchet@50145
|
264 |
|
blanchet@50218
|
265 |
val ctrs0 = map (Morphism.term phi) raw_ctrs;
|
blanchet@50218
|
266 |
val casex0 = Morphism.term phi raw_case;
|
blanchet@50218
|
267 |
|
blanchet@50218
|
268 |
val ctrs = map (mk_ctr As) ctrs0;
|
blanchet@50136
|
269 |
|
blanchet@50150
|
270 |
fun exhaust_tac {context = ctxt, ...} =
|
blanchet@50138
|
271 |
let
|
blanchet@50150
|
272 |
val fld_iff_unf_thm =
|
blanchet@50150
|
273 |
let
|
blanchet@50150
|
274 |
val goal =
|
blanchet@50150
|
275 |
fold_rev Logic.all [u, v]
|
blanchet@50150
|
276 |
(mk_Trueprop_eq (HOLogic.mk_eq (v, fld $ u), HOLogic.mk_eq (unf $ v, u)));
|
blanchet@50150
|
277 |
in
|
blanchet@50150
|
278 |
Skip_Proof.prove lthy [] [] goal (fn {context = ctxt, ...} =>
|
blanchet@50216
|
279 |
mk_fld_iff_unf_tac ctxt (map (SOME o certifyT lthy) [unfT, fpT])
|
blanchet@50191
|
280 |
(certify lthy fld) (certify lthy unf) fld_unf unf_fld)
|
blanchet@50150
|
281 |
|> Thm.close_derivation
|
blanchet@50150
|
282 |
|> Morphism.thm phi
|
blanchet@50150
|
283 |
end;
|
blanchet@50150
|
284 |
|
blanchet@50150
|
285 |
val sumEN_thm' =
|
blanchet@50150
|
286 |
Local_Defs.unfold lthy @{thms all_unit_eq}
|
blanchet@50225
|
287 |
(Drule.instantiate' (map (SOME o certifyT lthy) ctr_prod_Ts) [] (mk_sumEN n))
|
blanchet@50150
|
288 |
|> Morphism.thm phi;
|
blanchet@50138
|
289 |
in
|
blanchet@50176
|
290 |
mk_exhaust_tac ctxt n ctr_defs fld_iff_unf_thm sumEN_thm'
|
blanchet@50138
|
291 |
end;
|
blanchet@50136
|
292 |
|
blanchet@50141
|
293 |
val inject_tacss =
|
blanchet@50220
|
294 |
map2 (fn 0 => K [] | _ => fn ctr_def => [fn {context = ctxt, ...} =>
|
blanchet@50220
|
295 |
mk_inject_tac ctxt ctr_def fld_inject]) ms ctr_defs;
|
blanchet@50141
|
296 |
|
blanchet@50142
|
297 |
val half_distinct_tacss =
|
blanchet@50142
|
298 |
map (map (fn (def, def') => fn {context = ctxt, ...} =>
|
blanchet@50142
|
299 |
mk_half_distinct_tac ctxt fld_inject [def, def'])) (mk_half_pairss ctr_defs);
|
blanchet@50142
|
300 |
|
blanchet@50145
|
301 |
val case_tacs =
|
blanchet@50145
|
302 |
map3 (fn k => fn m => fn ctr_def => fn {context = ctxt, ...} =>
|
blanchet@50145
|
303 |
mk_case_tac ctxt n k m case_def ctr_def unf_fld) ks ms ctr_defs;
|
blanchet@50136
|
304 |
|
blanchet@50136
|
305 |
val tacss = [exhaust_tac] :: inject_tacss @ half_distinct_tacss @ [case_tacs];
|
blanchet@50149
|
306 |
|
blanchet@50225
|
307 |
fun some_lfp_sugar no_defs_lthy =
|
blanchet@50149
|
308 |
let
|
blanchet@50223
|
309 |
val fpT_to_C = fpT --> C;
|
blanchet@50223
|
310 |
val iter_T = fold_rev (curry (op --->)) g_Tss fpT_to_C;
|
blanchet@50223
|
311 |
val rec_T = fold_rev (curry (op --->)) h_Tss fpT_to_C;
|
blanchet@50214
|
312 |
|
blanchet@50214
|
313 |
val iter_binder = Binding.suffix_name ("_" ^ iterN) b;
|
blanchet@50214
|
314 |
val rec_binder = Binding.suffix_name ("_" ^ recN) b;
|
blanchet@50214
|
315 |
|
blanchet@50214
|
316 |
val iter_free = Free (Binding.name_of iter_binder, iter_T);
|
blanchet@50214
|
317 |
val rec_free = Free (Binding.name_of rec_binder, rec_T);
|
blanchet@50214
|
318 |
|
blanchet@50214
|
319 |
val iter_spec =
|
blanchet@50217
|
320 |
mk_Trueprop_eq (flat_list_comb (iter_free, gss),
|
blanchet@50214
|
321 |
Term.list_comb (fp_iter, map2 (mk_sum_caseN oo map2 mk_uncurried_fun) gss ysss));
|
blanchet@50214
|
322 |
val rec_spec =
|
blanchet@50217
|
323 |
mk_Trueprop_eq (flat_list_comb (rec_free, hss),
|
blanchet@50217
|
324 |
Term.list_comb (fp_rec, map2 (mk_sum_caseN oo map2 mk_uncurried2_fun) hss zssss));
|
blanchet@50214
|
325 |
|
blanchet@50214
|
326 |
val (([raw_iter, raw_rec], [raw_iter_def, raw_rec_def]), (lthy', lthy)) = no_defs_lthy
|
blanchet@50216
|
327 |
|> apfst split_list o fold_map2 (fn b => fn spec =>
|
blanchet@50214
|
328 |
Specification.definition (SOME (b, NONE, NoSyn), ((Thm.def_binding b, []), spec))
|
blanchet@50216
|
329 |
#>> apsnd snd) [iter_binder, rec_binder] [iter_spec, rec_spec]
|
blanchet@50214
|
330 |
||> `Local_Theory.restore;
|
blanchet@50216
|
331 |
|
blanchet@50216
|
332 |
(*transforms defined frees into consts (and more)*)
|
blanchet@50216
|
333 |
val phi = Proof_Context.export_morphism lthy lthy';
|
blanchet@50216
|
334 |
|
blanchet@50216
|
335 |
val iter_def = Morphism.thm phi raw_iter_def;
|
blanchet@50216
|
336 |
val rec_def = Morphism.thm phi raw_rec_def;
|
blanchet@50216
|
337 |
|
blanchet@50218
|
338 |
val iter0 = Morphism.term phi raw_iter;
|
blanchet@50218
|
339 |
val rec0 = Morphism.term phi raw_rec;
|
blanchet@50218
|
340 |
|
blanchet@50225
|
341 |
val iter = mk_iter_like As Cs iter0;
|
blanchet@50225
|
342 |
val recx = mk_iter_like As Cs rec0;
|
blanchet@50149
|
343 |
in
|
blanchet@50220
|
344 |
((ctrs, iter, recx, xss, ctr_defs, iter_def, rec_def), lthy)
|
blanchet@50149
|
345 |
end;
|
blanchet@50149
|
346 |
|
blanchet@50225
|
347 |
fun some_gfp_sugar no_defs_lthy =
|
blanchet@50225
|
348 |
let
|
blanchet@50225
|
349 |
(* qss, q_Tss, gsss, g_Tsss *)
|
blanchet@50225
|
350 |
fun zip_preds_and_getters p_Ts f_Tss = p_Ts @ flat f_Tss;
|
blanchet@50225
|
351 |
|
blanchet@50225
|
352 |
val qg_Tss = map2 zip_preds_and_getters q_Tss g_Tsss;
|
blanchet@50225
|
353 |
|
blanchet@50225
|
354 |
val B_to_fpT = C --> fpT;
|
blanchet@50225
|
355 |
val coiter_T = fold_rev (curry (op --->)) qg_Tss B_to_fpT;
|
blanchet@50225
|
356 |
(*
|
blanchet@50225
|
357 |
val corec_T = fold_rev (curry (op --->)) h_Tss fpT_to_C;
|
blanchet@50225
|
358 |
*)
|
blanchet@50225
|
359 |
|
blanchet@50225
|
360 |
val qgss = map2 zip_preds_and_getters qss gsss;
|
blanchet@50225
|
361 |
val cqss = map2 (fn c => map (fn q => q $ c)) cs qss;
|
blanchet@50225
|
362 |
val cgsss = map2 (fn c => map (map (fn g => g $ c))) cs gsss;
|
blanchet@50225
|
363 |
|
blanchet@50225
|
364 |
val coiter_binder = Binding.suffix_name ("_" ^ coiterN) b;
|
blanchet@50225
|
365 |
val corec_binder = Binding.suffix_name ("_" ^ corecN) b;
|
blanchet@50225
|
366 |
|
blanchet@50225
|
367 |
val coiter_free = Free (Binding.name_of coiter_binder, coiter_T);
|
blanchet@50225
|
368 |
(*
|
blanchet@50225
|
369 |
val corec_free = Free (Binding.name_of corec_binder, corec_T);
|
blanchet@50225
|
370 |
*)
|
blanchet@50225
|
371 |
|
blanchet@50225
|
372 |
val coiter_sum_prod_Ts = map range_type fp_iter_f_Ts;
|
blanchet@50225
|
373 |
val coiter_prod_Tss = map2 dest_sumTN ns coiter_sum_prod_Ts;
|
blanchet@50225
|
374 |
|
blanchet@50225
|
375 |
fun mk_join c n cqs sum_prod_T prod_Ts cgss =
|
blanchet@50225
|
376 |
Term.lambda c (mk_IfN sum_prod_T cqs
|
blanchet@50225
|
377 |
(map2 (mk_InN prod_Ts) (map HOLogic.mk_tuple cgss) (1 upto n)));
|
blanchet@50225
|
378 |
|
blanchet@50225
|
379 |
val coiter_spec =
|
blanchet@50225
|
380 |
mk_Trueprop_eq (flat_list_comb (coiter_free, qgss),
|
blanchet@50225
|
381 |
Term.list_comb (fp_iter,
|
blanchet@50225
|
382 |
map6 mk_join cs ns cqss coiter_sum_prod_Ts coiter_prod_Tss cgsss));
|
blanchet@50225
|
383 |
(*
|
blanchet@50225
|
384 |
val corec_spec =
|
blanchet@50225
|
385 |
mk_Trueprop_eq (flat_list_comb (corec_free, hss),
|
blanchet@50225
|
386 |
Term.list_comb (fp_rec, map2 (mk_sum_caseN oo map2 mk_uncurried2_fun) hss zssss));
|
blanchet@50225
|
387 |
*)
|
blanchet@50225
|
388 |
|
blanchet@50225
|
389 |
val (([raw_coiter (*, raw_corec*)], [raw_coiter_def (*, raw_corec_def*)]), (lthy', lthy)) = no_defs_lthy
|
blanchet@50225
|
390 |
|> apfst split_list o fold_map2 (fn b => fn spec =>
|
blanchet@50225
|
391 |
Specification.definition (SOME (b, NONE, NoSyn), ((Thm.def_binding b, []), spec))
|
blanchet@50225
|
392 |
#>> apsnd snd) [coiter_binder (*, corec_binder*)] [coiter_spec (*, corec_spec*)]
|
blanchet@50225
|
393 |
||> `Local_Theory.restore;
|
blanchet@50225
|
394 |
|
blanchet@50225
|
395 |
(*transforms defined frees into consts (and more)*)
|
blanchet@50225
|
396 |
val phi = Proof_Context.export_morphism lthy lthy';
|
blanchet@50225
|
397 |
|
blanchet@50225
|
398 |
val coiter_def = Morphism.thm phi raw_coiter_def;
|
blanchet@50225
|
399 |
(*
|
blanchet@50225
|
400 |
val corec_def = Morphism.thm phi raw_corec_def;
|
blanchet@50225
|
401 |
*)
|
blanchet@50225
|
402 |
|
blanchet@50225
|
403 |
val coiter0 = Morphism.term phi raw_coiter;
|
blanchet@50225
|
404 |
(*
|
blanchet@50225
|
405 |
val corec0 = Morphism.term phi raw_corec;
|
blanchet@50225
|
406 |
*)
|
blanchet@50225
|
407 |
|
blanchet@50225
|
408 |
val coiter = mk_iter_like As Cs coiter0;
|
blanchet@50225
|
409 |
(*
|
blanchet@50225
|
410 |
val corec = mk_iter_like As Cs corec0;
|
blanchet@50225
|
411 |
*)
|
blanchet@50225
|
412 |
|
blanchet@50225
|
413 |
(*###*)
|
blanchet@50225
|
414 |
val corec = @{term True};
|
blanchet@50225
|
415 |
val corec_def = TrueI;
|
blanchet@50225
|
416 |
in
|
blanchet@50225
|
417 |
((ctrs, coiter, corec, xss, ctr_defs, coiter_def, corec_def), lthy)
|
blanchet@50225
|
418 |
end;
|
blanchet@50134
|
419 |
in
|
blanchet@50218
|
420 |
wrap_datatype tacss ((ctrs0, casex0), (disc_binders, sel_binderss)) lthy'
|
blanchet@50225
|
421 |
|> (if lfp then some_lfp_sugar else some_gfp_sugar)
|
blanchet@50134
|
422 |
end;
|
blanchet@50182
|
423 |
|
blanchet@50220
|
424 |
fun pour_more_sugar_on_datatypes ((ctrss, iters, recs, xsss, ctr_defss, iter_defs, rec_defs),
|
blanchet@50220
|
425 |
lthy) =
|
blanchet@50217
|
426 |
let
|
blanchet@50217
|
427 |
val xctrss = map2 (map2 (curry Term.list_comb)) ctrss xsss;
|
blanchet@50219
|
428 |
val giters = map (fn iter => flat_list_comb (iter, gss)) iters;
|
blanchet@50219
|
429 |
val hrecs = map (fn recx => flat_list_comb (recx, hss)) recs;
|
blanchet@50216
|
430 |
|
blanchet@50217
|
431 |
val (iter_thmss, rec_thmss) =
|
blanchet@50222
|
432 |
let
|
blanchet@50219
|
433 |
fun mk_goal_iter_or_rec fss fc xctr f xs xs' =
|
blanchet@50222
|
434 |
fold_rev (fold_rev Logic.all) (xs :: fss)
|
blanchet@50222
|
435 |
(mk_Trueprop_eq (fc $ xctr, Term.list_comb (f, xs')));
|
blanchet@50216
|
436 |
|
blanchet@50219
|
437 |
fun fix_iter_free (x as Free (_, T)) =
|
blanchet@50219
|
438 |
(case find_index (eq_fpT T) fpTs of ~1 => x | j => nth giters j $ x);
|
blanchet@50219
|
439 |
fun fix_rec_free (x as Free (_, T)) =
|
blanchet@50219
|
440 |
(case find_index (eq_fpT T) fpTs of ~1 => [x] | j => [x, nth hrecs j $ x]);
|
blanchet@50219
|
441 |
|
blanchet@50219
|
442 |
val iter_xsss = map (map (map fix_iter_free)) xsss;
|
blanchet@50219
|
443 |
val rec_xsss = map (map (maps fix_rec_free)) xsss;
|
blanchet@50219
|
444 |
|
blanchet@50219
|
445 |
val goal_iterss =
|
blanchet@50219
|
446 |
map5 (map4 o mk_goal_iter_or_rec gss) giters xctrss gss xsss iter_xsss;
|
blanchet@50219
|
447 |
val goal_recss =
|
blanchet@50219
|
448 |
map5 (map4 o mk_goal_iter_or_rec hss) hrecs xctrss hss xsss rec_xsss;
|
blanchet@50219
|
449 |
|
blanchet@50218
|
450 |
val iter_tacss =
|
blanchet@50222
|
451 |
map2 (map o mk_iter_or_rec_tac pre_map_defs iter_defs) fp_iter_thms ctr_defss;
|
blanchet@50218
|
452 |
val rec_tacss =
|
blanchet@50222
|
453 |
map2 (map o mk_iter_or_rec_tac pre_map_defs rec_defs) fp_rec_thms ctr_defss;
|
blanchet@50217
|
454 |
in
|
blanchet@50220
|
455 |
(map2 (map2 (fn goal => fn tac => Skip_Proof.prove lthy [] [] goal (tac o #context)))
|
blanchet@50220
|
456 |
goal_iterss iter_tacss,
|
blanchet@50220
|
457 |
map2 (map2 (fn goal => fn tac => Skip_Proof.prove lthy [] [] goal (tac o #context)))
|
blanchet@50220
|
458 |
goal_recss rec_tacss)
|
blanchet@50217
|
459 |
end;
|
blanchet@50216
|
460 |
|
blanchet@50217
|
461 |
val notes =
|
blanchet@50217
|
462 |
[(itersN, iter_thmss),
|
blanchet@50217
|
463 |
(recsN, rec_thmss)]
|
blanchet@50217
|
464 |
|> maps (fn (thmN, thmss) =>
|
blanchet@50217
|
465 |
map2 (fn b => fn thms =>
|
blanchet@50217
|
466 |
((Binding.qualify true (Binding.name_of b) (Binding.name thmN), []), [(thms, [])]))
|
blanchet@50217
|
467 |
bs thmss);
|
blanchet@50217
|
468 |
in
|
blanchet@50217
|
469 |
lthy |> Local_Theory.notes notes |> snd
|
blanchet@50217
|
470 |
end;
|
blanchet@50217
|
471 |
|
blanchet@50219
|
472 |
val lthy' = lthy
|
blanchet@50225
|
473 |
|> fold_map pour_some_sugar_on_type (bs ~~ fpTs ~~ Cs ~~ flds ~~ unfs ~~ fp_iters ~~
|
blanchet@50225
|
474 |
fp_recs ~~ fld_unfs ~~ unf_flds ~~ fld_injects ~~ ctr_binderss ~~ ctr_mixfixess ~~
|
blanchet@50225
|
475 |
ctr_Tsss ~~ disc_binderss ~~ sel_bindersss)
|
blanchet@50220
|
476 |
|>> split_list7
|
blanchet@50223
|
477 |
|> (if lfp then pour_more_sugar_on_datatypes else snd);
|
blanchet@50182
|
478 |
|
blanchet@50182
|
479 |
val timer = time (timer ("Constructors, discriminators, selectors, etc., for the new " ^
|
blanchet@50223
|
480 |
(if lfp then "" else "co") ^ "datatype"));
|
blanchet@50127
|
481 |
in
|
blanchet@50219
|
482 |
(timer; lthy')
|
blanchet@50127
|
483 |
end;
|
blanchet@50127
|
484 |
|
blanchet@50214
|
485 |
fun datatype_cmd info specs lthy =
|
blanchet@50136
|
486 |
let
|
blanchet@50224
|
487 |
(* TODO: cleaner handling of fake contexts, without "background_theory" *)
|
blanchet@50199
|
488 |
(*the "perhaps o try" below helps gracefully handles the case where the new type is defined in a
|
blanchet@50199
|
489 |
locale and shadows an existing global type*)
|
blanchet@50194
|
490 |
val fake_thy = Theory.copy
|
blanchet@50199
|
491 |
#> fold (fn spec => perhaps (try (Sign.add_type lthy
|
blanchet@50199
|
492 |
(type_binder_of spec, length (type_args_constrained_of spec), mixfix_of spec)))) specs;
|
blanchet@50194
|
493 |
val fake_lthy = Proof_Context.background_theory fake_thy lthy;
|
blanchet@50136
|
494 |
in
|
blanchet@50214
|
495 |
prepare_datatype Syntax.read_typ info specs fake_lthy lthy
|
blanchet@50136
|
496 |
end;
|
blanchet@50134
|
497 |
|
blanchet@50144
|
498 |
val parse_opt_binding_colon = Scan.optional (Parse.binding --| Parse.$$$ ":") no_binder
|
blanchet@50134
|
499 |
|
blanchet@50127
|
500 |
val parse_ctr_arg =
|
blanchet@50134
|
501 |
Parse.$$$ "(" |-- parse_opt_binding_colon -- Parse.typ --| Parse.$$$ ")" ||
|
blanchet@50144
|
502 |
(Parse.typ >> pair no_binder);
|
blanchet@50127
|
503 |
|
blanchet@50127
|
504 |
val parse_single_spec =
|
blanchet@50127
|
505 |
Parse.type_args_constrained -- Parse.binding -- Parse.opt_mixfix --
|
blanchet@50134
|
506 |
(@{keyword "="} |-- Parse.enum1 "|" (parse_opt_binding_colon -- Parse.binding --
|
blanchet@50134
|
507 |
Scan.repeat parse_ctr_arg -- Parse.opt_mixfix));
|
blanchet@50127
|
508 |
|
blanchet@50127
|
509 |
val _ =
|
blanchet@50127
|
510 |
Outer_Syntax.local_theory @{command_spec "data"} "define BNF-based inductive datatypes"
|
blanchet@50223
|
511 |
(Parse.and_list1 parse_single_spec >> datatype_cmd true);
|
blanchet@50127
|
512 |
|
blanchet@50127
|
513 |
val _ =
|
blanchet@50127
|
514 |
Outer_Syntax.local_theory @{command_spec "codata"} "define BNF-based coinductive datatypes"
|
blanchet@50223
|
515 |
(Parse.and_list1 parse_single_spec >> datatype_cmd false);
|
blanchet@50127
|
516 |
|
blanchet@50127
|
517 |
end;
|