1 files changed, 16 insertions, 0 deletions
diff --git a/src/boost/libs/hana/test/optional/is_just.cpp b/src/boost/libs/hana/test/optional/is_just.cpp
new file mode 100644
index 000000000..49b1f98c7
--- /dev/null
+++ b/src/boost/libs/hana/test/optional/is_just.cpp
@@ -0,0 +1,16 @@
+// Copyright Louis Dionne 2013-2017
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
+
+#include <boost/hana/assert.hpp>
+#include <boost/hana/not.hpp>
+#include <boost/hana/optional.hpp>
+namespace hana = boost::hana;
+
+
+struct undefined { };
+
+int main() {
+    BOOST_HANA_CONSTANT_CHECK(hana::is_just(hana::just(undefined{})));
+    BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_just(hana::nothing)));
+}