Enh: test brace initialisation with values

test/Jamfile.v2

@@ -18,6 +18,7 @@ import testing ;
 {
   test-suite optional :
     [ run optional_test.cpp ]
+    [ run optional_test_braces.cpp ]
     [ run optional_test_swap.cpp ]
     [ run optional_test_conversions_from_U.cpp ]
     [ run optional_test_convert_from_T.cpp ]

test/optional_test_braces.cpp

@@ -0,0 +1,51 @@
+// Copyright (C) 2016 Jürgen Hunold
+//
+// Use, modification, and distribution is subject to 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)
+//
+// See http://www.boost.org/lib/optional for documentation.
+
+
+#include "boost/optional/optional.hpp"
+
+#include <iostream>
+
+#include "boost/core/lightweight_test.hpp"
+
+using boost::optional;
+
+
+struct Init
+{
+    Init(int,double);
+};
+
+#ifndef BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX
+
+
+template <typename T>
+void test_brace_init()
+{
+  optional<T> o = {1, 1.1};
+  BOOST_TEST(o);
+}
+
+template <typename T>
+void test_brace_assign()
+{
+  optional<T> o;
+  o = {1, 1.1};
+  BOOST_TEST(o);
+}
+#endif
+
+int main()
+{
+#ifndef BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX
+  test_brace_init<Init>();
+  test_brace_assign<Init>();
+#endif
+
+  return boost::report_errors();
+}