From 76697cbfae866d4ce2171f18ce164da87c652bc5 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Wed, 20 Apr 2016 08:27:44 +0200
Subject: Add missing cast() specialization

---
 build2/variable.ixx | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/build2/variable.ixx b/build2/variable.ixx
index 3184108..76a52c1 100644
--- a/build2/variable.ixx
+++ b/build2/variable.ixx
@@ -86,6 +86,15 @@ namespace build2
     return v.as<names> ();
   }
 
+  template <>
+  inline names&
+  cast (value& v)
+  {
+    assert (!v.null () &&
+            (v.type == nullptr || v.type == &value_traits<names>::value_type));
+    return v.as<names> ();
+  }
+
   template <typename T>
   inline const T&
   cast (const value& v)
-- 
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