From 25b260ab966d002c83f4b7778bcd71b762a302d8 Mon Sep 17 00:00:00 2001
From: herbelin
Date: Tue, 25 Sep 2007 09:01:24 +0000
Subject: Suppression de tous les alias de la forme x:=x dans la compilation du
 filtrage.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10140 85f007b7-540e-0410-9357-904b9bb8a0f7
---
 pretyping/cases.ml | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/pretyping/cases.ml b/pretyping/cases.ml
index 6ac1c8a166..fd8f24370a 100644
--- a/pretyping/cases.ml
+++ b/pretyping/cases.ml
@@ -112,12 +112,11 @@ type alias_constr =
 
 let mkSpecialLetInJudge j (na,(deppat,nondeppat,d,t)) =
   { uj_val =
-      (match d with
+     (if isRel deppat then subst1 nondeppat j.uj_val
+      else match d with
 	| DepAlias -> mkLetIn (na,deppat,t,j.uj_val)
 	| NonDepAlias ->
-	    if (not (dependent (mkRel 1) j.uj_type))
-	      or (* A leaf: *) isRel deppat
-	    then 
+	    if (not (dependent (mkRel 1) j.uj_type)) then 
 	      (* The body of pat is not needed to type j - see *)
 	      (* insert_aliases - and both deppat and nondeppat have the *)
 	      (* same type, then one can freely substitute one by the other *)
-- 
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