From c38b3585357a2200944cfd8e736f32093786350b Mon Sep 17 00:00:00 2001
From: Daniel-Constantin Mierla <miconda@gmail.com>
Date: Tue, 30 Aug 2022 12:54:51 +0200
Subject: [PATCH] tm: docs for t_exists()

---
 src/modules/tm/doc/functions.xml | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/src/modules/tm/doc/functions.xml b/src/modules/tm/doc/functions.xml
index f9c9837fb23..db070a246d1 100644
--- a/src/modules/tm/doc/functions.xml
+++ b/src/modules/tm/doc/functions.xml
@@ -1907,4 +1907,27 @@ t_clean();
 	    </programlisting>
 	</example>
     </section>
+
+	<section id="tm.f.t_exists">
+	<title>
+	    <function>t_exists()</function>
+	</title>
+	<para>
+		Return true of the transaction for current message exists, without
+		setting the global references.
+	</para>
+	<example>
+	    <title><function>t_exists</function> usage</title>
+	    <programlisting>
+...
+reply_route {
+    if (!t_exists()) {
+        drop();
+    }
+}
+...
+	    </programlisting>
+	</example>
+	</section>
+
   </section>