From ef6c950505956ebc3a99ab2cecd7b3ebcbb0feb2 Mon Sep 17 00:00:00 2001
From: Tobias Olry <tobias.olry@web.de>
Date: Sat, 29 Jul 2017 20:25:20 +0200
Subject: [PATCH] show how to use a variable as hash map key

---
 doc/templates.rst | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/templates.rst b/doc/templates.rst
index d4dbe32d6..3d60779a0 100644
--- a/doc/templates.rst
+++ b/doc/templates.rst
@@ -611,7 +611,8 @@ exist:
     { 2: 'foo', 4: 'bar' }
 
     {# keys as expressions (the expression must be enclosed into parentheses) -- as of Twig 1.5 #}
-    { (1 + 1): 'foo', (a ~ 'b'): 'bar' }
+    {% set foo = 'foo' %}
+    { (foo): 'foo', (1 + 1): 'bar', (foo ~ 'b'): 'baz' }
 
 * ``true`` / ``false``: ``true`` represents the true value, ``false``
   represents the false value.