From 9622d00afa6e94ef3ca026f9e15a7d122566e7d0 Mon Sep 17 00:00:00 2001
From: Linus Heckemann <git@sphalerite.org>
Date: Mon, 17 Apr 2017 10:33:53 +0100
Subject: Manual: document tryEval

---
 doc/manual/expressions/builtins.xml | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'doc')

diff --git a/doc/manual/expressions/builtins.xml b/doc/manual/expressions/builtins.xml
index e9baff65961a..8a18b71008cb 100644
--- a/doc/manual/expressions/builtins.xml
+++ b/doc/manual/expressions/builtins.xml
@@ -1163,6 +1163,19 @@ stdenv.mkDerivation (rec {
 
   </varlistentry>
 
+  <varlistentry><term><function>builtins.tryEval</function>
+  <replaceable>e</replaceable></term>
+
+    <listitem><para>Try to evaluate <replaceable>e</replaceable>.
+    Return a set containing the attributes <literal>success</literal>
+    (<literal>true</literal> if <replaceable>e</replaceable> evaluated
+    successfully, <literal>false</literal> if an error was thrown) and
+    <literal>value</literal>, equalling <replaceable>e</replaceable>
+    if successful and <literal>false</literal> otherwise.
+    </para></listitem>
+
+  </varlistentry>
+
 
   <varlistentry><term><function>builtins.typeOf</function>
   <replaceable>e</replaceable></term>
-- 
cgit 1.4.1