# HG changeset patch
# User wenzelm
# Date 964715229 -7200
# Node ID f23722b4fbe7e3e99e81f7702b68e93848e1f256
# Parent ea80449107cc7cae8620dbd5acdeecb1b78f7be6
export has_internal;
tag some rules as internal;
diff -r ea80449107cc -r f23722b4fbe7 src/Pure/drule.ML
--- a/src/Pure/drule.ML Thu Jul 27 18:25:55 2000 +0200
+++ b/src/Pure/drule.ML Thu Jul 27 18:27:09 2000 +0200
@@ -86,6 +86,15 @@
signature DRULE =
sig
include BASIC_DRULE
+ val rule_attribute : ('a -> thm -> thm) -> 'a attribute
+ val tag_rule : tag -> thm -> thm
+ val untag_rule : string -> thm -> thm
+ val tag : tag -> 'a attribute
+ val untag : string -> 'a attribute
+ val tag_lemma : 'a attribute
+ val tag_assumption : 'a attribute
+ val tag_internal : 'a attribute
+ val has_internal : tag list -> bool
val compose_single : thm * int * thm -> thm
val merge_rules : thm list * thm list -> thm list
val triv_goal : thm
@@ -101,14 +110,6 @@
val unvarifyT : thm -> thm
val unvarify : thm -> thm
val tvars_intr_list : string list -> thm -> thm
- val rule_attribute : ('a -> thm -> thm) -> 'a attribute
- val tag_rule : tag -> thm -> thm
- val untag_rule : string -> thm -> thm
- val tag : tag -> 'a attribute
- val untag : string -> 'a attribute
- val tag_lemma : 'a attribute
- val tag_assumption : 'a attribute
- val tag_internal : 'a attribute
end;
structure Drule: DRULE =
@@ -208,6 +209,36 @@
in (typ,sort) end;
+
+(** basic attributes **)
+
+(* dependent rules *)
+
+fun rule_attribute f (x, thm) = (x, (f x thm));
+
+
+(* add / delete tags *)
+
+fun map_tags f thm =
+ Thm.put_name_tags (Thm.name_of_thm thm, f (#2 (Thm.get_name_tags thm))) thm;
+
+fun tag_rule tg = map_tags (fn tgs => if tg mem tgs then tgs else tgs @ [tg]);
+fun untag_rule s = map_tags (filter_out (equal s o #1));
+
+fun tag tg x = rule_attribute (K (tag_rule tg)) x;
+fun untag s x = rule_attribute (K (untag_rule s)) x;
+
+fun simple_tag name x = tag (name, []) x;
+
+fun tag_lemma x = simple_tag "lemma" x;
+fun tag_assumption x = simple_tag "assumption" x;
+
+val internal_tag = ("internal", []);
+fun tag_internal x = tag internal_tag x;
+fun has_internal tags = exists (equal internal_tag) tags;
+
+
+
(** Standardization of rules **)
(*Strip extraneous shyps as far as possible*)
@@ -408,24 +439,22 @@
fun read_prop s = read_cterm proto_sign (s, propT);
-fun store_thm name thm = hd (PureThy.smart_store_thms (name, [standard thm]));
+fun store_thm name thm = hd (PureThy.smart_store_thms (name, [thm]));
+fun store_standard_thm name thm = store_thm name (standard thm);
val reflexive_thm =
let val cx = cterm_of proto_sign (Var(("x",0),TVar(("'a",0),logicS)))
- in store_thm "reflexive" (Thm.reflexive cx) end;
+ in store_standard_thm "reflexive" (Thm.reflexive cx) end;
val symmetric_thm =
let val xy = read_prop "x::'a::logic == y"
- in store_thm "symmetric"
- (Thm.implies_intr_hyps(Thm.symmetric(Thm.assume xy)))
- end;
+ in store_standard_thm "symmetric" (Thm.implies_intr_hyps (Thm.symmetric (Thm.assume xy))) end;
val transitive_thm =
let val xy = read_prop "x::'a::logic == y"
val yz = read_prop "y::'a::logic == z"
val xythm = Thm.assume xy and yzthm = Thm.assume yz
- in store_thm "transitive" (Thm.implies_intr yz (Thm.transitive xythm yzthm))
- end;
+ in store_standard_thm "transitive" (Thm.implies_intr yz (Thm.transitive xythm yzthm)) end;
fun symmetric_fun thm = thm RS symmetric_thm;
@@ -475,13 +504,13 @@
(*** Some useful meta-theorems ***)
(*The rule V/V, obtains assumption solving for eresolve_tac*)
-val asm_rl = store_thm "asm_rl" (trivial(read_prop "PROP ?psi"));
+val asm_rl = store_standard_thm "asm_rl" (Thm.trivial (read_prop "PROP ?psi"));
val _ = store_thm "_" asm_rl;
(*Meta-level cut rule: [| V==>W; V |] ==> W *)
val cut_rl =
- store_thm "cut_rl"
- (trivial(read_prop "PROP ?psi ==> PROP ?theta"));
+ store_standard_thm "cut_rl"
+ (Thm.trivial (read_prop "PROP ?psi ==> PROP ?theta"));
(*Generalized elim rule for one conclusion; cut_rl with reversed premises:
[| PROP V; PROP V ==> PROP W |] ==> PROP W *)
@@ -489,7 +518,7 @@
let val V = read_prop "PROP V"
and VW = read_prop "PROP V ==> PROP W";
in
- store_thm "revcut_rl"
+ store_standard_thm "revcut_rl"
(implies_intr V (implies_intr VW (implies_elim (assume VW) (assume V))))
end;
@@ -497,7 +526,7 @@
val thin_rl =
let val V = read_prop "PROP V"
and W = read_prop "PROP W";
- in store_thm "thin_rl" (implies_intr V (implies_intr W (assume W)))
+ in store_standard_thm "thin_rl" (implies_intr V (implies_intr W (assume W)))
end;
(* (!!x. PROP ?V) == PROP ?V Allows removal of redundant parameters*)
@@ -506,9 +535,9 @@
and QV = read_prop "!!x::'a. PROP V"
and x = read_cterm proto_sign ("x", TypeInfer.logicT);
in
- store_thm "triv_forall_equality"
- (equal_intr (implies_intr QV (forall_elim x (assume QV)))
- (implies_intr V (forall_intr x (assume V))))
+ store_standard_thm "triv_forall_equality"
+ (standard (equal_intr (implies_intr QV (forall_elim x (assume QV)))
+ (implies_intr V (forall_intr x (assume V)))))
end;
(* (PROP ?PhiA ==> PROP ?PhiB ==> PROP ?Psi) ==>
@@ -522,7 +551,7 @@
val minor1 = assume cminor1;
val cminor2 = read_prop "PROP PhiB";
val minor2 = assume cminor2;
- in store_thm "swap_prems_rl"
+ in store_standard_thm "swap_prems_rl"
(implies_intr cmajor (implies_intr cminor2 (implies_intr cminor1
(implies_elim (implies_elim major minor1) minor2))))
end;
@@ -535,7 +564,7 @@
let val PQ = read_prop "PROP phi ==> PROP psi"
and QP = read_prop "PROP psi ==> PROP phi"
in
- store_thm "equal_intr_rule"
+ store_standard_thm "equal_intr_rule"
(implies_intr PQ (implies_intr QP (equal_intr (assume PQ) (assume QP))))
end;
@@ -626,8 +655,10 @@
val G = read_prop "GOAL (PROP A)";
val (G_def, _) = freeze_thaw ProtoPure.Goal_def;
in
- val triv_goal = store_thm "triv_goal" (Thm.equal_elim (Thm.symmetric G_def) (Thm.assume A));
- val rev_triv_goal = store_thm "rev_triv_goal" (Thm.equal_elim G_def (Thm.assume G));
+ val triv_goal = store_thm "triv_goal"
+ (tag_rule internal_tag (standard (Thm.equal_elim (Thm.symmetric G_def) (Thm.assume A))));
+ val rev_triv_goal = store_thm "rev_triv_goal"
+ (tag_rule internal_tag (standard (Thm.equal_elim G_def (Thm.assume G))));
end;
val mk_cgoal = Thm.capply (Thm.cterm_of proto_sign (Const ("Goal", propT --> propT)));
@@ -760,32 +791,6 @@
fun mk_triv_goal ct = instantiate' [] [Some ct] triv_goal;
-
-(** basic attributes **)
-
-(* dependent rules *)
-
-fun rule_attribute f (x, thm) = (x, (f x thm));
-
-
-(* add / delete tags *)
-
-fun map_tags f thm =
- Thm.put_name_tags (Thm.name_of_thm thm, f (#2 (Thm.get_name_tags thm))) thm;
-
-fun tag_rule tg = map_tags (fn tgs => if tg mem tgs then tgs else tgs @ [tg]);
-fun untag_rule s = map_tags (filter_out (equal s o #1));
-
-fun tag tg x = rule_attribute (K (tag_rule tg)) x;
-fun untag s x = rule_attribute (K (untag_rule s)) x;
-
-fun simple_tag name x = tag (name, []) x;
-
-fun tag_lemma x = simple_tag "lemma" x;
-fun tag_assumption x = simple_tag "assumption" x;
-fun tag_internal x = simple_tag "internal" x;
-
-
end;