Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream

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

1 files changed, 28 insertions, 0 deletions

diff --git a/src/boost/libs/hana/test/optional/fold_right.cpp b/src/boost/libs/hana/test/optional/fold_right.cpp
new file mode 100644
index 000000000..2d3c1f5cd
--- /dev/null
+++ b/src/boost/libs/hana/test/optional/fold_right.cpp
@@ -0,0 +1,28 @@
+// 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/equal.hpp>
+#include <boost/hana/fold_right.hpp>
+#include <boost/hana/optional.hpp>
+
+#include <laws/base.hpp>
+namespace hana = boost::hana;
+
+
+int main() {
+    hana::test::ct_eq<2> x{};
+    hana::test::ct_eq<3> s{};
+    hana::test::_injection<0> f{};
+
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::fold_right(hana::just(x), s, f),
+        f(x, s)
+    ));
+
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::fold_right(hana::nothing, s, f),
+        s
+    ));
+}