From: Claudio Sacerdoti Coen <claudio.sacerdoticoen@unibo.it>
Date: Sat, 12 Jul 2008 11:43:21 +0000 (+0000)
Subject: New feature/bug fixed (hopefully): it is now possible to use fixed (term)
X-Git-Tag: make_still_working~4938
X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=2bd1dbc6fdad64f989089165a4e7367c072d2656;p=helm.git

New feature/bug fixed (hopefully): it is now possible to use fixed (term)
variables in fold bodies.
The notation for exists is now fully working as expected.
---

diff --git a/helm/software/components/content_pres/termContentPres.ml b/helm/software/components/content_pres/termContentPres.ml
index 691d4426d..a1f9268e4 100644
--- a/helm/software/components/content_pres/termContentPres.ml
+++ b/helm/software/components/content_pres/termContentPres.ml
@@ -511,6 +511,8 @@ let head_names names env =
         (match ty, v with
         | Env.ListType ty, Env.ListValue (v :: _) ->
             aux ((name, (ty, v)) :: acc) tl
+        | Env.TermType _, Env.TermValue _  ->
+            aux ((name, (ty, v)) :: acc) tl
         | _ -> assert false)
     | _ :: tl -> aux acc tl
       (* base pattern may contain only meta names, thus we trash all others *)
@@ -524,6 +526,8 @@ let tail_names names env =
         (match ty, v with
         | Env.ListType ty, Env.ListValue (_ :: vtl) ->
             aux ((name, (Env.ListType ty, Env.ListValue vtl)) :: acc) tl
+        | Env.TermType _, Env.TermValue _  ->
+            aux ((name, (ty, v)) :: acc) tl
         | _ -> assert false)
     | binding :: tl -> aux (binding :: acc) tl
     | [] -> acc
diff --git a/helm/software/matita/core_notation.moo b/helm/software/matita/core_notation.moo
index c7f1e5021..0043825ce 100644
--- a/helm/software/matita/core_notation.moo
+++ b/helm/software/matita/core_notation.moo
@@ -7,7 +7,10 @@ for @{ 'exists ${default
 (* Bugged notation: $T is not used if provided *)
 notation > "\exists list1 ident x sep , opt (: T). term 19 Px"
   with precedence 20
-  for ${fold right @{$Px} rec acc @{'exists (λ${ident x}.$acc)}}.
+  for ${ default
+          @{ ${ fold right @{$Px} rec acc @{'exists (λ${ident x}:$T.$acc)} } }
+          @{ ${ fold right @{$Px} rec acc @{'exists (λ${ident x}.$acc)} } }
+       }.
 
 notation "hvbox(\langle term 19 a, break term 19 b\rangle)" 
 with precedence 90 for @{ 'pair $a $b}.