1 files changed, 31 insertions, 0 deletions
diff --git a/src/boost/libs/multiprecision/test/test_optional_compat.cpp b/src/boost/libs/multiprecision/test/test_optional_compat.cpp
new file mode 100644
index 000000000..4626f9ccd
--- /dev/null
+++ b/src/boost/libs/multiprecision/test/test_optional_compat.cpp
@@ -0,0 +1,31 @@
+/*
+ *  (c) Copyright Andrey Semashev 2018.
+ *
+ *  Use, modification and distribution are 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)
+ */
+/*
+ * The test verifies that Boost.Multiprecision does not cause conflict with Boost.Optional
+ * because of its restricted conversion constructors and operators. See comments in:
+ *
+ * https://github.com/boostorg/integer/pull/11
+ */
+
+#include <boost/multiprecision/cpp_int.hpp>
+#include <boost/optional/optional.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+inline boost::optional<boost::multiprecision::int128_t> foo()
+{
+   return boost::optional<boost::multiprecision::int128_t>(10);
+}
+
+int main()
+{
+   boost::optional<boost::multiprecision::int128_t> num = foo();
+   BOOST_TEST(!!num);
+   BOOST_TEST(*num == 10);
+
+   return boost::report_errors();
+}