changes

[helm.git] / matita / components / ng_tactics / nTactics.ml

diff --git a/matita/components/ng_tactics/nTactics.ml b/matita/components/ng_tactics/nTactics.ml
index 104a044f696111f9b58ad5c0cae00793123ac160..6870dab573a258ec0c0e91d06b6dfdca72fdfe5f 100644 (file)
--- a/matita/components/ng_tactics/nTactics.ml
+++ b/matita/components/ng_tactics/nTactics.ml
@@ -624,9 +624,9 @@ let case1_tac name =
 ;;
 
 let constructor_tac ?(num=1) ~args = distribute_tac (fun status goal ->
-  if num < 1 then fail (lazy "constructor numbers begin with 1");
   let gty = get_goalty status goal in
-  let status, (r,_,_,_) = analyse_indty status gty in
+  let status, (r,consno,_,_) = analyse_indty status gty in
+  if num < 1 || num > consno then fail (lazy "Non existant constructor");
   let ref = NReference.mk_constructor num r in
   let t = 
     if args = [] then Ast.NRef ref else
@@ -705,7 +705,7 @@ let inversion_tac ~what:(txt,len,what) ~where =
      in
      let eliminator = 
        let _,_,w = what in
-       Ast.Appl [ Ast.Ident (name,None) ; Ast.Implicit `Vector ; w ]
+       Ast.Appl [ Ast.Ident (name,None) ; Ast.Implicit `Vector ; w ; Ast.Implicit `Vector]
      in
      exact_tac ("",0,eliminator) status) ]) 
 ;;