--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/Pure/Isar/generic_target.ML Tue Aug 10 14:15:44 2010 +0200
@@ -0,0 +1,162 @@
+(* Title: Pure/Isar/theory_target.ML
+ Author: Makarius
+ Author: Florian Haftmann, TU Muenchen
+
+Common target infrastructure.
+*)
+
+signature GENERIC_TARGET =
+sig
+ val define: (((binding * typ) * mixfix) * term -> binding -> term list
+ -> (string * sort) list * term list -> local_theory -> (term * thm) * local_theory)
+ -> (binding * mixfix) * (Attrib.binding * term) -> local_theory
+ -> (term * (string * thm)) * local_theory
+ val notes: (string
+ -> (Attrib.binding * (thm list * Args.src list) list) list
+ -> (Attrib.binding * (thm list * Args.src list) list) list
+ -> local_theory -> local_theory)
+ -> string -> (Attrib.binding * (thm list * Args.src list) list) list
+ -> local_theory -> (string * thm list) list * local_theory
+ val abbrev: (string * bool -> binding * mixfix -> term * term -> (string * sort) list * term list
+ -> local_theory -> local_theory)
+ -> string * bool -> (binding * mixfix) * term -> local_theory -> (term * term) * local_theory
+end;
+
+structure Generic_Target: GENERIC_TARGET =
+struct
+
+(* define *)
+
+fun define foundation ((b, mx), ((name, atts), rhs)) lthy =
+ let
+ val thy = ProofContext.theory_of lthy;
+ val thy_ctxt = ProofContext.init_global thy;
+
+ val name' = Thm.def_binding_optional b name;
+
+ (*term and type parameters*)
+ val crhs = Thm.cterm_of thy rhs;
+ val (defs, rhs') = Local_Defs.export_cterm lthy thy_ctxt crhs ||> Thm.term_of;
+ val rhs_conv = MetaSimplifier.rewrite true defs crhs;
+
+ val xs = Variable.add_fixed (Local_Theory.target_of lthy) rhs' [];
+ val T = Term.fastype_of rhs;
+ val tfreesT = Term.add_tfreesT T (fold (Term.add_tfreesT o #2) xs []);
+ val extra_tfrees = rev (subtract (op =) tfreesT (Term.add_tfrees rhs []));
+
+ val type_params = map (Logic.mk_type o TFree) extra_tfrees;
+ val term_params =
+ rev (Variable.fixes_of (Local_Theory.target_of lthy))
+ |> map_filter (fn (_, x) =>
+ (case AList.lookup (op =) xs x of
+ SOME T => SOME (Free (x, T))
+ | NONE => NONE));
+ val params = type_params @ term_params;
+
+ val U = map Term.fastype_of params ---> T;
+
+ (*foundation*)
+ val ((lhs', global_def), lthy3) = foundation
+ (((b, U), mx), rhs') name' params (extra_tfrees, type_params) lthy;
+
+ (*local definition*)
+ val ((lhs, local_def), lthy4) = lthy3
+ |> Local_Defs.add_def ((b, NoSyn), lhs');
+ val def = Local_Defs.trans_terms lthy4
+ [(*c == global.c xs*) local_def,
+ (*global.c xs == rhs'*) global_def,
+ (*rhs' == rhs*) Thm.symmetric rhs_conv];
+
+ (*note*)
+ val ([(res_name, [res])], lthy5) = lthy4
+ |> Local_Theory.notes_kind "" [((name', atts), [([def], [])])];
+ in ((lhs, (res_name, res)), lthy5) end;
+
+
+(* notes *)
+
+fun import_export_proof ctxt (name, raw_th) =
+ let
+ val thy = ProofContext.theory_of ctxt;
+ val thy_ctxt = ProofContext.init_global thy;
+ val certT = Thm.ctyp_of thy;
+ val cert = Thm.cterm_of thy;
+
+ (*export assumes/defines*)
+ val th = Goal.norm_result raw_th;
+ val (defs, th') = Local_Defs.export ctxt thy_ctxt th;
+ val assms = map (MetaSimplifier.rewrite_rule defs o Thm.assume) (Assumption.all_assms_of ctxt);
+ val nprems = Thm.nprems_of th' - Thm.nprems_of th;
+
+ (*export fixes*)
+ val tfrees = map TFree (Thm.fold_terms Term.add_tfrees th' []);
+ val frees = map Free (Thm.fold_terms Term.add_frees th' []);
+ val (th'' :: vs) = (th' :: map (Drule.mk_term o cert) (map Logic.mk_type tfrees @ frees))
+ |> Variable.export ctxt thy_ctxt
+ |> Drule.zero_var_indexes_list;
+
+ (*thm definition*)
+ val result = PureThy.name_thm true true name th'';
+
+ (*import fixes*)
+ val (tvars, vars) =
+ chop (length tfrees) (map (Thm.term_of o Drule.dest_term) vs)
+ |>> map Logic.dest_type;
+
+ val instT = map_filter (fn (TVar v, T) => SOME (v, T) | _ => NONE) (tvars ~~ tfrees);
+ val inst = filter (is_Var o fst) (vars ~~ frees);
+ val cinstT = map (pairself certT o apfst TVar) instT;
+ val cinst = map (pairself (cert o Term.map_types (Term_Subst.instantiateT instT))) inst;
+ val result' = Thm.instantiate (cinstT, cinst) result;
+
+ (*import assumes/defines*)
+ val assm_tac = FIRST' (map (fn assm => Tactic.compose_tac (false, assm, 0)) assms);
+ val result'' =
+ (case SINGLE (Seq.INTERVAL assm_tac 1 nprems) result' of
+ NONE => raise THM ("Failed to re-import result", 0, [result'])
+ | SOME res => Local_Defs.contract ctxt defs (Thm.cprop_of th) res)
+ |> Goal.norm_result
+ |> PureThy.name_thm false false name;
+
+ in (result'', result) end;
+
+fun notes target_notes kind facts lthy =
+ let
+ val thy = ProofContext.theory_of lthy;
+ val facts' = facts
+ |> map (fn (a, bs) => (a, PureThy.burrow_fact (PureThy.name_multi
+ (Local_Theory.full_name lthy (fst a))) bs))
+ |> PureThy.map_facts (import_export_proof lthy);
+ val local_facts = PureThy.map_facts #1 facts';
+ val global_facts = PureThy.map_facts #2 facts';
+ in
+ lthy
+ |> target_notes kind global_facts local_facts
+ |> ProofContext.note_thmss kind (Attrib.map_facts (Attrib.attribute_i thy) local_facts)
+ end;
+
+
+(* abbrev *)
+
+fun abbrev target_abbrev prmode ((b, mx), t) lthy =
+ let
+ val thy_ctxt = ProofContext.init_global (ProofContext.theory_of lthy);
+ val target_ctxt = Local_Theory.target_of lthy;
+
+ val t' = Assumption.export_term lthy target_ctxt t;
+ val xs = map Free (rev (Variable.add_fixed target_ctxt t' []));
+ val u = fold_rev lambda xs t';
+
+ val extra_tfrees =
+ subtract (op =) (Term.add_tfreesT (Term.fastype_of u) []) (Term.add_tfrees u []);
+
+ val global_rhs =
+ singleton (Variable.export_terms (Variable.declare_term u target_ctxt) thy_ctxt) u;
+ in
+ lthy
+ |> target_abbrev prmode (b, mx) (global_rhs, t') (extra_tfrees, xs)
+ |> ProofContext.add_abbrev Print_Mode.internal (b, t) |> snd
+ |> Local_Defs.fixed_abbrev ((b, NoSyn), t)
+ end;
+
+end;