1 files changed, 26 insertions, 0 deletions
diff --git a/src/boost/libs/hana/example/type/metafunction.cpp b/src/boost/libs/hana/example/type/metafunction.cpp
new file mode 100644
index 000000000..a60d60778
--- /dev/null
+++ b/src/boost/libs/hana/example/type/metafunction.cpp
@@ -0,0 +1,26 @@
+// 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/type.hpp>
+
+#include <type_traits>
+namespace hana = boost::hana;
+
+
+template <typename ...> struct f { struct type; };
+struct x;
+struct y;
+
+BOOST_HANA_CONSTANT_CHECK(hana::metafunction<f>() == hana::type_c<f<>::type>);
+BOOST_HANA_CONSTANT_CHECK(hana::metafunction<f>(hana::type_c<x>) == hana::type_c<f<x>::type>);
+BOOST_HANA_CONSTANT_CHECK(hana::metafunction<f>(hana::type_c<x>, hana::type_c<y>) == hana::type_c<f<x, y>::type>);
+
+static_assert(std::is_same<
+    decltype(hana::metafunction<f>)::apply<x, y>::type,
+    f<x, y>::type
+>::value, "");
+
+int main() { }