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-rw-r--r--doc/refman/RefMan-tac.tex11
1 files changed, 11 insertions, 0 deletions
diff --git a/doc/refman/RefMan-tac.tex b/doc/refman/RefMan-tac.tex
index 3f9f03c40f..40954f83ed 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}}