1 files changed, 43 insertions, 0 deletions
diff --git a/src/boost/libs/hana/test/ext/std/array/at.cpp b/src/boost/libs/hana/test/ext/std/array/at.cpp
new file mode 100644
index 000000000..90ed1f5b7
--- /dev/null
+++ b/src/boost/libs/hana/test/ext/std/array/at.cpp
@@ -0,0 +1,43 @@
+// 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/ext/std/array.hpp>
+
+#include <boost/hana/assert.hpp>
+#include <boost/hana/at.hpp>
+
+#include <laws/base.hpp> // for move_only
+
+#include <array>
+namespace hana = boost::hana;
+
+
+int main() {
+    // Check non-const lvalue reference
+    {
+        std::array<int, 2> arr = {{999, 888}};
+        int& i = hana::at_c<0>(arr);
+        BOOST_HANA_RUNTIME_CHECK(i == 999);
+        arr[0] = 333;
+        BOOST_HANA_RUNTIME_CHECK(i == 333);
+        i = 444;
+        BOOST_HANA_RUNTIME_CHECK(arr[0] == 444);
+    }
+
+    // Check const lvalue reference
+    {
+        std::array<int, 2> arr = {{999, 888}};
+        int const& i = hana::at_c<0>(static_cast<std::array<int, 2> const&>(arr));
+        BOOST_HANA_RUNTIME_CHECK(i == 999);
+        arr[0] = 333;
+        BOOST_HANA_RUNTIME_CHECK(i == 333);
+    }
+
+    // Check move-only types
+    {
+        std::array<hana::test::move_only, 2> arr{};
+        hana::test::move_only m = hana::at_c<0>(std::move(arr));
+        (void)m;
+    }
+}