From 4b0bca5ec2b9330bbb1d604cae29b7d54a7abe8b Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@pdimov.com>
Date: Tue, 10 Jun 2014 03:37:21 +0300
Subject: [PATCH] Add a test for ref(ref(x)).

---
 test/Jamfile.v2       |  1 +
 test/ref_ref_test.cpp | 37 +++++++++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+)
 create mode 100644 test/ref_ref_test.cpp

diff --git a/test/Jamfile.v2 b/test/Jamfile.v2
index d88d6cb..ebd3bd9 100644
--- a/test/Jamfile.v2
+++ b/test/Jamfile.v2
@@ -19,6 +19,7 @@ compile-fail checked_delete_fail2.cpp ;
 
 compile ref_ct_test.cpp ;
 run ref_test.cpp ;
+run ref_ref_test.cpp ;
 compile-fail ref_rv_fail1.cpp ;
 compile-fail ref_rv_fail2.cpp ;
 compile-fail ref_rv_fail3.cpp ;
diff --git a/test/ref_ref_test.cpp b/test/ref_ref_test.cpp
new file mode 100644
index 0000000..202c01c
--- /dev/null
+++ b/test/ref_ref_test.cpp
@@ -0,0 +1,37 @@
+//
+// Test for ref(ref(x))
+//
+// Copyright 2014 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+//
+
+#include <boost/ref.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+int main()
+{
+    int x = 0;
+
+    {
+        boost::reference_wrapper< int > r = boost::ref( boost::ref( x ) );
+        BOOST_TEST_EQ( &r.get(), &x );
+    }
+
+    {
+        boost::reference_wrapper< int const > r = boost::ref( boost::cref( x ) );
+        BOOST_TEST_EQ( &r.get(), &x );
+    }
+
+    {
+        boost::reference_wrapper< int const > r = boost::cref( boost::ref( x ) );
+        BOOST_TEST_EQ( &r.get(), &x );
+    }
+
+    {
+        boost::reference_wrapper< int const > r = boost::cref( boost::cref( x ) );
+        BOOST_TEST_EQ( &r.get(), &x );
+    }
+}