Never implemented tactics compare and decide equality purged from the code.

[helm.git] / components / tactics / discriminationTactics.ml

diff --git a/components/tactics/discriminationTactics.ml b/components/tactics/discriminationTactics.ml
index 9e5bc7f43e1d3885225d6f3ecd24dbab01faab73..0ffa2c52b4ceb70d0bff28a98a7182e4611c8b60 100644 (file)
--- a/components/tactics/discriminationTactics.ml
+++ b/components/tactics/discriminationTactics.ml
@@ -341,66 +341,6 @@ let discriminate_tac ~term =
  in
   ProofEngineTypes.mk_tactic (discriminate_tac ~term)
 
-let decide_equality_tac =
-(* il goal e' un termine della forma t1=t2\/~t1=t2; la tattica decide se l'uguaglianza
-e' vera o no e lo risolve *)
-  Tacticals.id_tac
-
-let compare_tac ~term = Tacticals.id_tac
- (*
-(* term is in the form t1=t2; the tactic leaves two goals: in the first you have to          *)
-(* demonstrate the goal with the additional hyp that t1=t2, in the second the hyp is ~t1=t2  *)
-  let module C = Cic in
-  let module U = UriManager in
-  let module P = PrimitiveTactics in
-  let module T = Tacticals in
-   let _,metasenv,_,_ = proof in
-    let _,context,gty = CicUtil.lookup_meta goal metasenv in
-     let termty = (CicTypeChecker.type_of_aux' metasenv context term) in
-      match termty with
-         (C.Appl [(C.MutInd (uri, 0, [])); _; t1; t2]) when (uri = (U.uri_of_string "cic:/Coq/Init/Logic/eq.ind")) ->
-          
-          let term' = (* (t1=t2)\/~(t1=t2) *)
-           C.Appl [
-            (C.MutInd ((U.uri_of_string "cic:/Coq/Init/Logic/or.ind"), 0, [])) ; 
-            term ; 
-            C.Appl [
-             (C.MutInd ((U.uri_of_string "cic:/Coq/Init/Logic/eq.ind"), 1, [])) ; 
-             t1 ; 
-             C.Appl [C.Const ((U.uri_of_string "cic:/Coq/Init/Logic/not.con"), []) ; t2]
-            ]
-           ] 
-          in
-            T.thens 
-               ~start:(P.cut_tac ~term:term')
-               ~continuations:[
-                 T.then_ ~start:(P.intros_tac) ~continuation:(P.elim_intros_simpl_tac ~term:(C.Rel 1)) ; 
-                 decide_equality_tac]  
-               status
-      | (C.Appl [(C.MutInd (uri, 0, [])); _; t1; t2]) when (uri = (U.uri_of_string "cic:/Coq/Init/Logic_Type/eqT.ind")) ->
-          let term' = (* (t1=t2) \/ ~(t1=t2) *)
-           C.Appl [
-            (C.MutInd ((U.uri_of_string "cic:/Coq/Init/Logic/or.ind"), 0, [])) ; 
-            term ; 
-            C.Appl [
-             (C.MutInd ((U.uri_of_string "cic:/Coq/Init/Logic_Type/eqT.ind"), 1, [])) ; 
-             t1 ; 
-             C.Appl [C.Const ((U.uri_of_string "cic:/Coq/Init/Logic/not.con"), []) ; t2]
-            ]
-           ] 
-          in
-            T.thens 
-               ~start:(P.cut_tac ~term:term')
-               ~continuations:[
-                 T.then_ ~start:(P.intros_tac) ~continuation:(P.elim_intros_simpl_tac ~term:(C.Rel 1)) ; 
-                 decide_equality_tac]  
-               status
-      | _ -> raise (ProofEngineTypes.Fail "Compare: Not an equality") 
-*)
-;;
-
-
-
 (* DISCRIMINTATE SENZA INJECTION 
 
 exception TwoDifferentSubtermsFound of (Cic.term * Cic.term * int)