Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 20 insertions, 0 deletions

diff --git a/src/boost/libs/hana/example/optional/make.cpp b/src/boost/libs/hana/example/optional/make.cpp
new file mode 100644
index 00000000..fd0034a7
--- /dev/null
+++ b/src/boost/libs/hana/example/optional/make.cpp
@@ -0,0 +1,20 @@
+// 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/core/make.hpp>
+#include <boost/hana/equal.hpp>
+#include <boost/hana/optional.hpp>
+namespace hana = boost::hana;
+
+
+int main() {
+    constexpr auto x = hana::make<hana::optional_tag>();
+    BOOST_HANA_CONSTANT_CHECK(x == hana::make_optional());
+    BOOST_HANA_CONSTANT_CHECK(hana::is_nothing(x));
+
+    constexpr auto just_x = hana::make<hana::optional_tag>('x');
+    static_assert(just_x == hana::make_optional('x'), "");
+    BOOST_HANA_CONSTANT_CHECK(hana::is_just(just_x));
+}