added actual operations;

--- a/src/Pure/Isar/local_theory.ML	Tue Jan 24 00:43:28 2006 +0100
+++ b/src/Pure/Isar/local_theory.ML	Tue Jan 24 00:43:29 2006 +0100
@@ -9,17 +9,27 @@
 sig
   val map_theory: (theory -> theory) -> Proof.context -> Proof.context
   val map_theory_result: (theory -> 'a * theory) -> Proof.context -> 'a * Proof.context
-  val init: string option -> theory -> Proof.context
+  val init: xstring option -> theory -> Proof.context
+  val init_i: string option -> theory -> Proof.context
   val exit: Proof.context -> theory
+  val locale_of: Proof.context -> string option
   val params_of: Proof.context -> (string * typ) list
-  val consts: (string * typ * mixfix) list -> Proof.context ->
-    ((string * typ) list * term list) * Proof.context
+  val hyps_of: Proof.context -> term list
+  val pretty_consts: Proof.context -> (string * typ) list -> Pretty.T
+  val consts: ((string * typ) * mixfix) list -> Proof.context -> term list * Proof.context
+  val notes: string -> ((bstring * Attrib.src list) * (thm list * Attrib.src list) list) list ->
+    Proof.context -> (bstring * thm list) list * Proof.context
+  val note: (bstring * Attrib.src list) -> thm list -> Proof.context ->
+    (bstring * thm list) * Proof.context
+  val axioms: ((string * Attrib.src list) * term list) list -> Proof.context ->
+    (bstring * thm list) list * Proof.context
 end;
 
 structure LocalTheory: LOCAL_THEORY =
 struct
 
-(* local context data *)
+
+(** local context data **)
 
 structure Data = ProofDataFun
 (
@@ -35,8 +45,13 @@
 
 val _ = Context.add_setup Data.init;
 
+val locale_of = #locale o Data.get;
+val params_of = #params o Data.get;
+val hyps_of = #hyps o Data.get;
 
-(* theory *)
+
+
+(** theory **)
 
 fun map_theory f ctxt =
   ProofContext.transfer (f (ProofContext.theory_of ctxt)) ctxt;
@@ -45,39 +60,110 @@
   let val (res, thy') = f (ProofContext.theory_of ctxt)
   in (res, ProofContext.transfer thy' ctxt) end;
 
-fun init NONE thy = ProofContext.init thy
-  | init (SOME loc) thy =
+fun init_i NONE thy = ProofContext.init thy
+  | init_i (SOME loc) thy =
       thy
       |> Locale.init loc
-      |> (fn ctxt => Data.put
+      |> ProofContext.inferred_fixes
+      ||>> `ProofContext.assms_of
+      |-> (fn (params, hyps) => Data.put
           {locale = SOME loc,
-           params = Locale.the_params thy loc,
-           hyps = ProofContext.assms_of ctxt,   (* FIXME query locale!! *)
-           exit = Sign.restore_naming thy} ctxt)
-      |> map_theory (Sign.add_path loc #> Sign.no_base_names);
+           params = params,
+           hyps = hyps,
+           exit = Sign.restore_naming thy})
+      |> map_theory (Sign.add_path (Sign.base_name loc) #> Sign.no_base_names);
+
+fun init target thy = init_i (Option.map (Locale.intern thy) target) thy;
 
 fun exit ctxt = #exit (Data.get ctxt) (ProofContext.theory_of ctxt);
 
 
-(* local theory *)
+
+(** local theory **)
+
+(* pretty_consts *)
+
+local
+
+fun pretty_var ctxt (x, T) =
+  Pretty.block [Pretty.str x, Pretty.str " ::", Pretty.brk 1,
+    Pretty.quote (ProofContext.pretty_typ ctxt T)];
 
-val params_of = #params o Data.get;
+fun pretty_vars ctxt kind vs = Pretty.big_list kind (map (pretty_var ctxt) vs);
+
+in
+
+fun pretty_consts ctxt cs =
+  (case params_of ctxt of
+    [] => pretty_vars ctxt "constants" cs
+  | ps => Pretty.chunks [pretty_vars ctxt "parameters" ps, pretty_vars ctxt "constants" cs]);
+
+end;
+
+
+(* consts *)
 
 fun consts decls ctxt =
   let
     val thy = ProofContext.theory_of ctxt;
     val params = params_of ctxt;
     val ps = map Free params;
-    val Us = map snd params;
-
-    val xs = decls |> map (fn (c, _, mx) => Syntax.const_name c mx);
-    val Ts = map #2 decls;
-    fun const x T = Term.list_comb (Const (Sign.full_name thy x, Us ---> T), ps);
+    val Ps = map snd params;
   in
     ctxt
-    |> map_theory (Sign.add_consts_i (decls |> map (fn (c, T, mx) => (c, Us ---> T, mx))))
-    |> ProofContext.add_fixes_i (decls |> map (fn (c, T, mx) => (c, SOME T, mx)))
-    |-> (fn xs' => pair ((xs' ~~ Ts), map2 const xs Ts))
+    |> map_theory (Sign.add_consts_i (decls |> map (fn ((c, T), mx) => (c, Ps ---> T, mx))))
+    |> pair (decls |> map (fn ((c, T), _) =>
+      Term.list_comb (Const (Sign.full_name thy c, Ps ---> T), ps)))
+  end;
+
+
+(* notes *)
+
+fun notes kind facts ctxt =
+  (case locale_of ctxt of
+    NONE => ctxt |> map_theory_result
+      (PureThy.note_thmss_i (Drule.kind kind)
+        (Attrib.map_facts (Attrib.attribute_i (ProofContext.theory_of ctxt)) facts))
+  | SOME loc => ctxt |> map_theory_result (Locale.note_thmss_i kind loc facts #> apsnd #1));
+
+fun note a ths ctxt =
+  ctxt |> notes Drule.theoremK [(a, [(ths, [])])] |>> hd;
+
+
+(* axioms *)
+
+fun forall_elim frees =
+  let
+    fun elim (x, T) th =
+      let
+        val cert = Thm.cterm_of (Thm.theory_of_thm th);
+        val var = cert (Var ((x, 0), #1 (Logic.dest_all (Thm.prop_of th))));
+      in ((var, cert (Free (x, T))), Thm.forall_elim var th) end;
+  in fold_map elim frees #-> Drule.cterm_instantiate end;
+
+fun implies_elim hyps rule =
+  let val cert = Thm.cterm_of (Thm.theory_of_thm rule)
+  in fold (fn hyp => fn th => Thm.assume (cert hyp) COMP th) hyps rule end;
+
+fun add_axiom name hyps prop thy =
+  let
+    val name' = (if name = "" then "axiom" else name) ^ "_" ^ string_of_int (serial ());
+    val frees = rev ([] |> Term.add_frees prop |> fold Term.add_frees hyps);
+    val prop' = Term.list_all_free (frees, Logic.list_implies (hyps, prop));
+    val thy' = thy |> Theory.add_axioms_i [(name', prop')];
+    val th =
+      Thm.get_axiom_i thy' (Sign.full_name thy' name')
+      |> forall_elim frees |> implies_elim hyps
+      |> Goal.norm_hhf;
+  in (th, thy') end;
+
+fun axioms specs ctxt =
+  let
+    val thy = ProofContext.theory_of ctxt;
+    val hyps = hyps_of ctxt;
+  in
+    ctxt |> fold_map (fn ((name, atts), props) =>
+      map_theory_result (fold_map (add_axiom name hyps) props) #-> note (name, atts)) specs
   end;
 
 end;