--- a/src/Pure/Isar/object_logic.ML Sat Jan 28 17:28:58 2006 +0100
+++ b/src/Pure/Isar/object_logic.ML Sat Jan 28 17:28:59 2006 +0100
@@ -22,23 +22,27 @@
val atomize_tac: int -> tactic
val full_atomize_tac: int -> tactic
val atomize_goal: int -> thm -> thm
- val unatomize_term: theory -> term -> term
- val unatomize_tac: int -> tactic
val rulify_term: theory -> term -> term
val rulify_tac: int -> tactic
val rulify: thm -> thm
val rulify_no_asm: thm -> thm
val rule_format: attribute
val rule_format_no_asm: attribute
+ val meta_rewrite_cterm: cterm -> thm
+ val meta_rewrite_thm: thm -> thm
+ val meta_rewrite_tac: int -> tactic
+ val unfold: thm list -> thm -> thm
+ val unfold_goals: thm list -> thm -> thm
+ val unfold_tac: thm list -> tactic
+ val fold: thm list -> thm -> thm
+ val fold_tac: thm list -> tactic
end;
structure ObjectLogic: OBJECT_LOGIC =
struct
-(** object-logic theory data **)
-
-(* data kind 'Pure/object-logic' *)
+(** theory data **)
structure ObjectLogicData = TheoryDataFun
(struct
@@ -66,7 +70,7 @@
(** generic treatment of judgments -- with a single argument only **)
-(* add_judgment(_i) *)
+(* add judgment *)
local
@@ -125,7 +129,6 @@
(* maintain rules *)
val get_atomize = #1 o #2 o ObjectLogicData.get;
-val get_unatomize = map Thm.symmetric o get_atomize;
val get_rulify = #2 o #2 o ObjectLogicData.get;
val declare_atomize =
@@ -162,12 +165,6 @@
(case Seq.pull (atomize_tac i st) of NONE => st | SOME (st', _) => st');
-(* unatomize -- not necessarily the same as rulify *)
-
-fun unatomize_term thy = MetaSimplifier.rewrite_term thy (get_unatomize thy) [];
-fun unatomize_tac i st = rewrite_goal_tac (get_unatomize (Thm.theory_of_thm st)) i st;
-
-
(* rulify *)
fun rulify_term thy = MetaSimplifier.rewrite_term thy (get_rulify thy) [];
@@ -184,4 +181,36 @@
fun rule_format_no_asm x = Thm.rule_attribute (fn _ => rulify_no_asm) x;
+(* handle object-level equalities *)
+
+local
+
+val equals_ss =
+ MetaSimplifier.theory_context ProtoPure.thy MetaSimplifier.empty_ss
+ addeqcongs [Drule.equals_cong]; (*protect meta-level equality*)
+
+fun rewrite rules =
+ MetaSimplifier.rewrite_cterm (false, false, false) (K (K NONE)) (equals_ss addsimps rules);
+
+in
+
+fun meta_rewrite_cterm ct =
+ let val thy = Thm.theory_of_cterm ct in
+ Thm.transitive
+ (rewrite (get_rulify thy) ct)
+ (rewrite (map Thm.symmetric (get_atomize thy)) ct) (*produce meta-level equality*)
+ end;
+
+val meta_rewrite_thm = Drule.fconv_rule meta_rewrite_cterm;
+fun meta_rewrite_tac i =
+ PRIMITIVE (Drule.fconv_rule (Drule.goals_conv (equal i) meta_rewrite_cterm));
+
+val unfold = Tactic.rewrite_rule o map meta_rewrite_thm;
+val unfold_goals = Tactic.rewrite_goals_rule o map meta_rewrite_thm;
+val unfold_tac = Tactic.rewrite_goals_tac o map meta_rewrite_thm;
+val fold = Tactic.fold_rule o map meta_rewrite_thm;
+val fold_tac = Tactic.fold_goals_tac o map meta_rewrite_thm;
+
end;
+
+end;