diff -r cdf338ef5fad -r f362c0323d92 src/HOL/SVC_Oracle.ML
--- a/src/HOL/SVC_Oracle.ML	Tue Feb 05 15:51:28 2002 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,113 +0,0 @@
-(*  Title:      HOL/SVC_Oracle.ML
-    ID:         $Id$
-    Author:     Lawrence C Paulson
-    Copyright   1999  University of Cambridge
-
-Installing the oracle for SVC (Stanford Validity Checker)
-
-The following code merely CALLS the oracle; 
-  the soundness-critical functions are at HOL/Tools/svc_funcs.ML
-
-Based upon the work of Søren T. Heilmann
-*)
-
-
-(*Generalize an Isabelle formula, replacing by Vars
-  all subterms not intelligible to SVC.*)
-fun svc_abstract t =
-  let
-    (*The oracle's result is given to the subgoal using compose_tac because
-      its premises are matched against the assumptions rather than used
-      to make subgoals.  Therefore , abstraction must copy the parameters
-      precisely and make them available to all generated Vars.*)
-    val params = Term.strip_all_vars t
-    and body   = Term.strip_all_body t
-    val Us = map #2 params
-    val nPar = length params
-    val vname = ref "V_a"
-    val pairs = ref ([] : (term*term) list)
-    fun insert t = 
-	let val T = fastype_of t
-            val v = Unify.combound (Var ((!vname,0), Us--->T),
-				    0, nPar)
-	in  vname := bump_string (!vname); 
-	    pairs := (t, v) :: !pairs;
-	    v
-	end;
-    fun replace t = 
-	case t of
-	    Free _  => t  (*but not existing Vars, lest the names clash*)
-	  | Bound _ => t
-	  | _ => (case gen_assoc Pattern.aeconv (!pairs, t) of
-		      Some v => v
-		    | None   => insert t)
-    (*abstraction of a numeric literal*)
-    fun lit (t as Const("0", _)) = t
-      | lit (t as Const("1", _)) = t
-      | lit (t as Const("Numeral.number_of", _) $ w) = t
-      | lit t = replace t
-    (*abstraction of a real/rational expression*)
-    fun rat ((c as Const("op +", _)) $ x $ y) = c $ (rat x) $ (rat y)
-      | rat ((c as Const("op -", _)) $ x $ y) = c $ (rat x) $ (rat y)
-      | rat ((c as Const("op /", _)) $ x $ y) = c $ (rat x) $ (rat y)
-      | rat ((c as Const("op *", _)) $ x $ y) = c $ (rat x) $ (rat y)
-      | rat ((c as Const("uminus", _)) $ x) = c $ (rat x)
-      | rat t = lit t
-    (*abstraction of an integer expression: no div, mod*)
-    fun int ((c as Const("op +", _)) $ x $ y) = c $ (int x) $ (int y)
-      | int ((c as Const("op -", _)) $ x $ y) = c $ (int x) $ (int y)
-      | int ((c as Const("op *", _)) $ x $ y) = c $ (int x) $ (int y)
-      | int ((c as Const("uminus", _)) $ x) = c $ (int x)
-      | int t = lit t
-    (*abstraction of a natural number expression: no minus*)
-    fun nat ((c as Const("op +", _)) $ x $ y) = c $ (nat x) $ (nat y)
-      | nat ((c as Const("op *", _)) $ x $ y) = c $ (nat x) $ (nat y)
-      | nat ((c as Const("Suc", _)) $ x) = c $ (nat x)
-      | nat t = lit t
-    (*abstraction of a relation: =, <, <=*)
-    fun rel (T, c $ x $ y) =
-	    if T = HOLogic.realT then c $ (rat x) $ (rat y)
-	    else if T = HOLogic.intT then c $ (int x) $ (int y)
-	    else if T = HOLogic.natT then c $ (nat x) $ (nat y)
-	    else if T = HOLogic.boolT then c $ (fm x) $ (fm y)
-	    else replace (c $ x $ y)   (*non-numeric comparison*)
-    (*abstraction of a formula*)
-    and fm ((c as Const("op &", _)) $ p $ q) = c $ (fm p) $ (fm q)
-      | fm ((c as Const("op |", _)) $ p $ q) = c $ (fm p) $ (fm q)
-      | fm ((c as Const("op -->", _)) $ p $ q) = c $ (fm p) $ (fm q)
-      | fm ((c as Const("Not", _)) $ p) = c $ (fm p)
-      | fm ((c as Const("True", _))) = c
-      | fm ((c as Const("False", _))) = c
-      | fm (t as Const("op =",  Type ("fun", [T,_])) $ _ $ _) = rel (T, t)
-      | fm (t as Const("op <",  Type ("fun", [T,_])) $ _ $ _) = rel (T, t)
-      | fm (t as Const("op <=", Type ("fun", [T,_])) $ _ $ _) = rel (T, t)
-      | fm t = replace t
-    (*entry point, and abstraction of a meta-formula*)
-    fun mt ((c as Const("Trueprop", _)) $ p) = c $ (fm p)
-      | mt ((c as Const("==>", _)) $ p $ q)  = c $ (mt p) $ (mt q)
-      | mt t = fm t  (*it might be a formula*)
-  in (list_all (params, mt body), !pairs) end;
-
-
-(*Present the entire subgoal to the oracle, assumptions and all, but possibly
-  abstracted.  Use via compose_tac, which performs no lifting but will
-  instantiate variables.*)
-local val svc_thy = the_context () in
-
-fun svc_tac i st = 
-  let val prem = BasisLibrary.List.nth (prems_of st, i-1)
-      val (absPrem, _) = svc_abstract prem
-      val th = invoke_oracle svc_thy "svc_oracle"
-	             (#sign (rep_thm st), Svc.OracleExn absPrem)
-   in 
-      compose_tac (false, th, 0) i st
-   end 
-   handle Svc.OracleExn _ => Seq.empty
-	| Subscript       => Seq.empty;
-
-end;
-
-
-(*check if user has SVC installed*)
-fun svc_enabled () = getenv "SVC_HOME" <> "";
-fun if_svc_enabled f x = if svc_enabled () then f x else ();