From b42da20a5b89a266b1a3964819d03b5ef7214688 Mon Sep 17 00:00:00 2001
From: herbelin
Date: Wed, 19 Sep 2007 09:03:21 +0000
Subject: Indication de quel type de constantes est dépliable dans "simpl" (cf
 message de Benjamin Pierce de sep 2007 sur coq-club) [report de la révision
 10128 de la 8.1 vers le trunk]

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@10129 85f007b7-540e-0410-9357-904b9bb8a0f7
---
 doc/refman/RefMan-tac.tex | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/doc/refman/RefMan-tac.tex b/doc/refman/RefMan-tac.tex
index 864a004fe1..90b3d1b2e5 100644
--- a/doc/refman/RefMan-tac.tex
+++ b/doc/refman/RefMan-tac.tex
@@ -953,7 +953,12 @@ $\beta\iota$-reduction rule.  Then it expands transparent constants
 and tries to reduce {\tt T'} according, once more, to $\beta\iota$
 rules. But when the $\iota$ rule is not applicable then possible
 $\delta$-reductions are not applied.  For instance trying to use {\tt
-  simpl} on {\tt (plus n O)=n} does change nothing.
+simpl} on {\tt (plus n O)=n} does change nothing.  Notice that only
+transparent constants whose name can be reused as such in the
+recursive calls are possibly unfolded. For instance a constant defined
+by {\tt plus' := plus} is possibly unfolded and reused in the
+recursive calls, but a constant such as {\tt succ := plus (S O)} is
+never unfolded.
 
 \tacindex{simpl \dots\ in}
 \begin{Variants}
-- 
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