src/HOL/cladata.ML

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/HOL/cladata.ML	Thu Sep 12 10:40:05 1996 +0200
@@ -0,0 +1,63 @@
+(*  Title:      HOL/cladata.ML
+    ID:         $Id$
+    Author:     Tobias Nipkow
+    Copyright   1996  University of Cambridge
+
+Setting up the classical reasoner 
+*)
+
+
+(** Applying HypsubstFun to generate hyp_subst_tac **)
+section "Classical Reasoner";
+
+structure Hypsubst_Data =
+  struct
+  structure Simplifier = Simplifier
+  (*Take apart an equality judgement; otherwise raise Match!*)
+  fun dest_eq (Const("Trueprop",_) $ (Const("op =",_)  $ t $ u)) = (t,u);
+  val eq_reflection = eq_reflection
+  val imp_intr = impI
+  val rev_mp = rev_mp
+  val subst = subst
+  val sym = sym
+  end;
+
+structure Hypsubst = HypsubstFun(Hypsubst_Data);
+open Hypsubst;
+
+(*** Applying ClassicalFun to create a classical prover ***)
+structure Classical_Data = 
+  struct
+  val sizef     = size_of_thm
+  val mp        = mp
+  val not_elim  = notE
+  val classical = classical
+  val hyp_subst_tacs=[hyp_subst_tac]
+  end;
+
+structure Classical = ClassicalFun(Classical_Data);
+open Classical;
+
+(*Propositional rules*)
+val prop_cs = empty_cs addSIs [refl,TrueI,conjI,disjCI,impI,notI,iffI]
+                       addSEs [conjE,disjE,impCE,FalseE,iffE];
+
+(*Quantifier rules*)
+val HOL_cs = prop_cs addSIs [allI] addIs [exI,ex1I]
+                     addSEs [exE,ex1E] addEs [allE];
+
+exception CS_DATA of claset;
+
+let fun merge [] = CS_DATA empty_cs
+      | merge cs = let val cs = map (fn CS_DATA x => x) cs;
+                   in CS_DATA (foldl merge_cs (hd cs, tl cs)) end;
+
+    fun put (CS_DATA cs) = claset := cs;
+
+    fun get () = CS_DATA (!claset);
+in add_thydata "HOL"
+     ("claset", ThyMethods {merge = merge, put = put, get = get})
+end;
+
+claset := HOL_cs;
+