Add tactic has_evar (#2433)

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@13664 85f007b7-540e-0410-9357-904b9bb8a0f7

1 files changed, 11 insertions, 0 deletions

diff --git a/doc/refman/RefMan-tac.tex b/doc/refman/RefMan-tac.tex
index 3f9f03c40..40954f83e 100644
--- a/doc/refman/RefMan-tac.tex
+++ b/doc/refman/RefMan-tac.tex
@@ -999,6 +999,17 @@ variables generated by e.g. {\tt eapply} (see Section~\ref{apply}).
 
 \ErrMsg \errindex{Not an evar}
 
+\subsection{\tt has\_evar \term
+\tacindex{has\_evar}
+\label{hasevar}}
+
+This tactic applies to any goal. It checks whether its argument has an
+existential variable as a subterm. Unlike {\tt context} patterns
+combined with {\tt is\_evar}, this tactic scans all subterms,
+including those under binders.
+
+\ErrMsg \errindex{No evars}
+
 \subsection{Bindings list
 \index{Binding list}
 \label{Binding-list}}