X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Ftactics%2FequalityTactics.ml;h=bd73865af94ffcf050498704a9be1be71543ff23;hb=66929b8edb58d468a134b648466f3e9c45ba5c0e;hp=89da5c9fdc12b329b25ea35b0a70f64525d1474e;hpb=5f00ef380aafdaae93a40a3a47491d43ec9c3a62;p=helm.git

diff --git a/helm/software/components/tactics/equalityTactics.ml b/helm/software/components/tactics/equalityTactics.ml
index 89da5c9fd..bd73865af 100644
--- a/helm/software/components/tactics/equalityTactics.ml
+++ b/helm/software/components/tactics/equalityTactics.ml
@@ -44,8 +44,10 @@ let rec rewrite_tac ~direction ~pattern:(wanted,hyps_pat,concl_pat) equality =
  let _rewrite_tac status =
   assert (wanted = None);   (* this should be checked syntactically *)
   let proof,goal = status in
-  let curi, metasenv, pbo, pty = proof in
+  let curi, metasenv, _subst, pbo, pty, attrs = proof in
   let (metano,context,gty) = CicUtil.lookup_meta goal metasenv in
+  let gsort,_ =
+   CicTypeChecker.type_of_aux' metasenv context gty CicUniv.oblivion_ugraph in
   match hyps_pat with
      he::(_::_ as tl) ->
        PET.apply_tactic
@@ -73,7 +75,7 @@ let rec rewrite_tac ~direction ~pattern:(wanted,hyps_pat,concl_pat) equality =
           [] -> assert false
         | Some (Cic.Name s,Cic.Decl ty)::_ when name = s ->
            Cic.Rel n, S.lift n ty
-        | Some (Cic.Name s,Cic.Def _)::_ -> assert false (*CSC: not implemented yet! But does this make any sense?*)
+        | Some (Cic.Name s,Cic.Def _)::_ when name = s -> assert false (*CSC: not implemented yet! But does this make any sense?*)
         | _::tl -> find_hyp (n+1) tl
       in
        let arg,gty = find_hyp 1 context in
@@ -117,8 +119,16 @@ let rec rewrite_tac ~direction ~pattern:(wanted,hyps_pat,concl_pat) equality =
     | C.Appl [C.MutInd (uri, 0, []); ty; t1; t2]
       when LibraryObjects.is_eq_URI uri ->
         let ind_uri =
-         if_right_to_left dir2
-          LibraryObjects.eq_ind_URI LibraryObjects.eq_ind_r_URI
+         match gsort with
+            C.Sort C.Prop ->
+             if_right_to_left dir2
+              LibraryObjects.eq_ind_URI LibraryObjects.eq_ind_r_URI
+          | C.Sort C.Set ->
+             if_right_to_left dir2
+              LibraryObjects.eq_rec_URI LibraryObjects.eq_rec_r_URI
+          | _ ->
+             if_right_to_left dir2
+              LibraryObjects.eq_rect_URI LibraryObjects.eq_rect_r_URI
         in
         let eq_ind = C.Const (ind_uri uri,[]) in
          if dir2 then
@@ -139,7 +149,9 @@ let rec rewrite_tac ~direction ~pattern:(wanted,hyps_pat,concl_pat) equality =
       match concl_pat with
       | None -> None
       | Some term -> Some (S.lift 1 term) in
-    Some (fun _ m u -> lifted_t1, m, u),[],lifted_concl_pat
+    Some (fun c m u -> 
+       let distance  = pred (List.length c - List.length context) in
+       S.lift distance lifted_t1, m, u),[],lifted_concl_pat
   in
   let subst,metasenv',ugraph,_,selected_terms_with_context =
    ProofEngineHelpers.select
@@ -184,7 +196,7 @@ let rec rewrite_tac ~direction ~pattern:(wanted,hyps_pat,concl_pat) equality =
   try 
     let (proof',goals) =
       PET.apply_tactic 
-        (tac ~term:exact_proof newtyp) ((curi,metasenv',pbo,pty),goal)
+        (tac ~term:exact_proof newtyp) ((curi,metasenv',_subst,pbo,pty, attrs),goal)
     in
     let goals =
      goals@(ProofEngineHelpers.compare_metasenvs ~oldmetasenv:metasenv
@@ -217,7 +229,7 @@ let replace_tac ~(pattern: ProofEngineTypes.lazy_pattern) ~with_what =
  let replace_tac ~(pattern: ProofEngineTypes.lazy_pattern) ~with_what status =
   let _wanted, hyps_pat, concl_pat = pattern in
   let (proof, goal) = status in
-  let uri,metasenv,pbo,pty = proof in
+  let uri,metasenv,_subst,pbo,pty, attrs = proof in
   let (_,context,ty) as conjecture = CicUtil.lookup_meta goal metasenv in
   assert (hyps_pat = []); (*CSC: not implemented yet *)
   let eq_URI =
@@ -234,7 +246,7 @@ let replace_tac ~(pattern: ProofEngineTypes.lazy_pattern) ~with_what =
   let with_what = CicMetaSubst.apply_subst subst with_what in
   let pbo = CicMetaSubst.apply_subst subst pbo in
   let pty = CicMetaSubst.apply_subst subst pty in
-  let status = (uri,metasenv,pbo,pty),goal in
+  let status = (uri,metasenv,_subst,pbo,pty, attrs),goal in
   let ty_of_with_what,u =
    CicTypeChecker.type_of_aux'
     metasenv context with_what CicUniv.empty_ugraph in
@@ -276,7 +288,7 @@ let replace_tac ~(pattern: ProofEngineTypes.lazy_pattern) ~with_what =
            (ProofEngineTypes.Fail
              (lazy "Replace: one of the selected terms and the term to be replaced with have not convertible types"))
        ) l in
-  let rec aux n whats status =
+  let rec aux n whats (status : ProofEngineTypes.status) =
    match whats with
       [] -> ProofEngineTypes.apply_tactic T.id_tac status
     | (what,lazy_pattern)::tl ->
@@ -301,7 +313,7 @@ let replace_tac ~(pattern: ProofEngineTypes.lazy_pattern) ~with_what =
                     ~start:(
                       ProofEngineTypes.mk_tactic
                        (function ((proof,goal) as status) ->
-                         let _,metasenv,_,_ = proof in
+                         let _,metasenv,_subst,_,_, _ = proof in
                          let _,context,_ = CicUtil.lookup_meta goal metasenv in
                          let hyps =
                           try
@@ -316,7 +328,7 @@ let replace_tac ~(pattern: ProofEngineTypes.lazy_pattern) ~with_what =
               T.id_tac])
          status
   and aux_tac n tl = ProofEngineTypes.mk_tactic (aux n tl) in
-   aux 0 whats status
+   aux 0 whats (status : ProofEngineTypes.status)
  in
    ProofEngineTypes.mk_tactic (replace_tac ~pattern ~with_what)
 ;;
@@ -330,7 +342,7 @@ let reflexivity_tac =
 
 let symmetry_tac =
  let symmetry_tac (proof, goal) =
-   let (_,metasenv,_,_) = proof in
+   let (_,metasenv,_subst,_,_, _) = proof in
     let metano,context,ty = CicUtil.lookup_meta goal metasenv in
      match (R.whd context ty) with
         (C.Appl [(C.MutInd (uri, 0, [])); _; _; _])
@@ -348,7 +360,7 @@ let symmetry_tac =
 let transitivity_tac ~term =
  let transitivity_tac ~term status =
   let (proof, goal) = status in
-   let (_,metasenv,_,_) = proof in
+   let (_,metasenv,_subst,_,_, _) = proof in
     let metano,context,ty = CicUtil.lookup_meta goal metasenv in
      match (R.whd context ty) with
         (C.Appl [(C.MutInd (uri, 0, [])); _; _; _]) 
@@ -366,83 +378,3 @@ let transitivity_tac ~term =
   ProofEngineTypes.mk_tactic (transitivity_tac ~term)
 ;;
 
-(* FG: subst tactic *********************************************************)
-
-(* FG: This should be replaced by T.try_tactic *)
-let try_tactic ~tactic =
-   let try_tactic status =
-      try PET.apply_tactic tactic status with
-         | PET.Fail _ -> PET.apply_tactic T.id_tac status
-   in
-   PET.mk_tactic try_tactic
-
-let rec lift_rewrite_tac ~context ~direction ~pattern equality =
-   let lift_rewrite_tac status =
-      let (proof, goal) = status in
-      let (_, metasenv, _, _) = proof in
-      let _, new_context, _ = CicUtil.lookup_meta goal metasenv in
-      let n = List.length new_context - List.length context in
-      let equality = if n > 0 then S.lift n equality else equality in
-      PET.apply_tactic (rewrite_tac ~direction ~pattern equality []) status
-   in
-   PET.mk_tactic lift_rewrite_tac
-
-
-let msg0 = lazy "Subst: not found in context"
-let msg1 = lazy "Subst: not a simple equality"
-let msg2 = lazy "Subst: recursive equation" 
-
-let subst_tac ~hyp =
-   let hole = C.Implicit (Some `Hole) in
-   let subst_tac status =
-      let (proof, goal) = status in
-      let (_, metasenv, _, _) = proof in
-      let _, context, _ = CicUtil.lookup_meta goal metasenv in
-      let what = match PEH.get_rel context hyp with
-         | Some t -> t
-	 | None   -> raise (PET.Fail msg0)
-      in
-      let ty, _ = TC.type_of_aux' metasenv context what CicUniv.empty_ugraph in
-      let direction, i, t = match ty with
-         | (C.Appl [(C.MutInd (uri, 0, [])); _; C.Rel i; t]) 
-	    when LO.is_eq_URI uri -> `LeftToRight, i, t
-         | (C.Appl [(C.MutInd (uri, 0, [])); _; t; C.Rel i]) 
-	    when LO.is_eq_URI uri -> `RightToLeft, i, t
-	 | _ -> raise (PET.Fail msg1)
-      in    
-      let rewrite pattern =
-         let tactic = lift_rewrite_tac ~context ~direction ~pattern what in
-	 try_tactic ~tactic
-      in
-      let var = match PEH.get_name context i with
-         | Some name -> name
-	 | None      -> raise (PET.Fail msg0)	
-      in
-      if DTI.does_not_occur i t then () else raise (PET.Fail msg2);
-      let map self = function
-         | Some (C.Name s, _) when s <> self -> 
-            Some (rewrite (None, [(s, hole)], None))
-         | _                                 -> None
-      in
-      let rew_hips = HEL.list_rev_map_filter (map hyp) context in
-      let rew_concl = rewrite (None, [], Some hole) in
-      let clear = PESR.clear ~hyps:[hyp; var] in
-      let tactics = List.rev_append (rew_concl :: rew_hips) [clear] in
-      PET.apply_tactic (T.seq ~tactics) status
-   in
-   PET.mk_tactic subst_tac
-
-let subst_tac =
-   let subst hyp = try_tactic ~tactic:(subst_tac hyp) in
-   let map = function
-      | Some (C.Name s, _) -> Some (subst s)
-      | _                  -> None
-   in
-   let subst_tac status =
-      let (proof, goal) = status in
-      let (_, metasenv, _, _) = proof in
-      let _, context, _ = CicUtil.lookup_meta goal metasenv in
-      let tactics = HEL.list_rev_map_filter map context in
-      PET.apply_tactic (T.seq ~tactics) status
-   in
-   PET.mk_tactic subst_tac