Implemented reset syntax: o = {}

test/optional_test_empty_braces.cpp

@@ -0,0 +1,57 @@
+// Copyright (C) 2016 Andrzej Krzemienski.
+//
+// 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.
+//
+// You are welcome to contact the author at:
+//  akrzemi1@gmail.com
+
+#include "boost/optional/optional.hpp"
+
+#ifdef __BORLANDC__
+#pragma hdrstop
+#endif
+
+#include "boost/core/lightweight_test.hpp"
+
+//#ifndef BOOST_OPTIONAL_NO_CONVERTING_ASSIGNMENT
+//#ifndef BOOST_OPTIONAL_NO_CONVERTING_COPY_CTOR
+
+using boost::optional;
+
+struct Value
+{
+  explicit Value(int) {}
+};
+
+#ifndef BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX
+template <typename T>
+void test_brace_init()
+{
+  optional<T> o = {};
+  BOOST_TEST(!o);
+}
+
+template <typename T>
+void test_brace_assign()
+{
+  optional<T> o;
+  o = {};
+  BOOST_TEST(!o);
+} 
+#endif
+
+int main()
+{
+#ifndef BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX
+  test_brace_init<int>();
+  test_brace_init<Value>();
+  test_brace_assign<int>();
+  test_brace_assign<Value>();
+#endif
+
+  return boost::report_errors();
+}