diff -r 50ea65e84d98 -r b1965c8992c8 src/Pure/type.ML
--- a/src/Pure/type.ML	Mon Apr 18 12:11:58 2011 +0200
+++ b/src/Pure/type.ML	Mon Apr 18 13:26:39 2011 +0200
@@ -86,17 +86,16 @@
   val eq_type: tyenv -> typ * typ -> bool
 
   (*extend and merge type signatures*)
-  val add_class: Proof.context -> Context.pretty -> Name_Space.naming ->
-    binding * class list -> tsig -> tsig
+  val add_class: Proof.context -> Name_Space.naming -> binding * class list -> tsig -> tsig
   val hide_class: bool -> string -> tsig -> tsig
   val set_defsort: sort -> tsig -> tsig
   val add_type: Proof.context -> Name_Space.naming -> binding * int -> tsig -> tsig
   val add_abbrev: Proof.context -> Name_Space.naming -> binding * string list * typ -> tsig -> tsig
   val add_nonterminal: Proof.context -> Name_Space.naming -> binding -> tsig -> tsig
   val hide_type: bool -> string -> tsig -> tsig
-  val add_arity: Context.pretty -> arity -> tsig -> tsig
-  val add_classrel: Context.pretty -> class * class -> tsig -> tsig
-  val merge_tsig: Context.pretty -> tsig * tsig -> tsig
+  val add_arity: Proof.context -> arity -> tsig -> tsig
+  val add_classrel: Proof.context -> class * class -> tsig -> tsig
+  val merge_tsig: Proof.context -> tsig * tsig -> tsig
 end;
 
 structure Type: TYPE =
@@ -577,14 +576,14 @@
 
 (* classes *)
 
-fun add_class ctxt pp naming (c, cs) tsig =
+fun add_class ctxt naming (c, cs) tsig =
   tsig |> map_tsig (fn ((space, classes), default, types) =>
     let
       val cs' = map (cert_class tsig) cs
         handle TYPE (msg, _, _) => error msg;
       val _ = Binding.check c;
       val (c', space') = space |> Name_Space.declare ctxt true naming c;
-      val classes' = classes |> Sorts.add_class pp (c', cs');
+      val classes' = classes |> Sorts.add_class ctxt (c', cs');
     in ((space', classes'), default, types) end);
 
 fun hide_class fully c = map_tsig (fn ((space, classes), default, types) =>
@@ -593,7 +592,7 @@
 
 (* arities *)
 
-fun add_arity pp (t, Ss, S) tsig = tsig |> map_tsig (fn ((space, classes), default, types) =>
+fun add_arity ctxt (t, Ss, S) tsig = tsig |> map_tsig (fn ((space, classes), default, types) =>
   let
     val _ =
       (case lookup_type tsig t of
@@ -602,18 +601,18 @@
       | NONE => error (undecl_type t));
     val (Ss', S') = (map (cert_sort tsig) Ss, cert_sort tsig S)
       handle TYPE (msg, _, _) => error msg;
-    val classes' = classes |> Sorts.add_arities pp ((t, map (fn c' => (c', Ss')) S'));
+    val classes' = classes |> Sorts.add_arities ctxt ((t, map (fn c' => (c', Ss')) S'));
   in ((space, classes'), default, types) end);
 
 
 (* classrel *)
 
-fun add_classrel pp rel tsig =
+fun add_classrel ctxt rel tsig =
   tsig |> map_tsig (fn ((space, classes), default, types) =>
     let
       val rel' = pairself (cert_class tsig) rel
         handle TYPE (msg, _, _) => error msg;
-      val classes' = classes |> Sorts.add_classrel pp rel';
+      val classes' = classes |> Sorts.add_classrel ctxt rel';
     in ((space, classes'), default, types) end);
 
 
@@ -674,7 +673,7 @@
 
 (* merge type signatures *)
 
-fun merge_tsig pp (tsig1, tsig2) =
+fun merge_tsig ctxt (tsig1, tsig2) =
   let
     val (TSig {classes = (space1, classes1), default = default1, types = types1,
       log_types = _}) = tsig1;
@@ -682,7 +681,7 @@
       log_types = _}) = tsig2;
 
     val space' = Name_Space.merge (space1, space2);
-    val classes' = Sorts.merge_algebra pp (classes1, classes2);
+    val classes' = Sorts.merge_algebra ctxt (classes1, classes2);
     val default' = Sorts.inter_sort classes' (default1, default2);
     val types' = Name_Space.merge_tables (types1, types2);
   in build_tsig ((space', classes'), default', types') end;