1 files changed, 50 insertions, 0 deletions
diff --git a/src/boost/libs/hana/test/tuple/at.const.cpp b/src/boost/libs/hana/test/tuple/at.const.cpp
new file mode 100644
index 00000000..47d9b624
--- /dev/null
+++ b/src/boost/libs/hana/test/tuple/at.const.cpp
@@ -0,0 +1,50 @@
+// 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/tuple.hpp>
+
+#include <string>
+namespace hana = boost::hana;
+
+
+struct Empty { };
+
+int main() {
+    {
+        using T = hana::tuple<int>;
+        const T t(3);
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t) == 3);
+    }
+    {
+        using T = hana::tuple<std::string, int>;
+        const T t("high", 5);
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t) == "high");
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(t) == 5);
+    }
+    {
+        using T = hana::tuple<double, int>;
+        constexpr T t(2.718, 5);
+        static_assert(hana::at_c<0>(t) == 2.718, "");
+        static_assert(hana::at_c<1>(t) == 5, "");
+    }
+    {
+        using T = hana::tuple<Empty>;
+        constexpr T t{Empty()};
+        constexpr Empty e = hana::at_c<0>(t); (void)e;
+    }
+    {
+        using T = hana::tuple<double&, std::string, int>;
+        double d = 1.5;
+        const T t(d, "high", 5);
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t) == 1.5);
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(t) == "high");
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(t) == 5);
+        hana::at_c<0>(t) = 2.5;
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t) == 2.5);
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(t) == "high");
+        BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(t) == 5);
+        BOOST_HANA_RUNTIME_CHECK(d == 2.5);
+    }
+}