add subtree-ish sources for 12.0.3

[ceph.git] / ceph / src / boost / libs / hana / example / duplicate.cpp

diff --git a/ceph/src/boost/libs/hana/example/duplicate.cpp b/ceph/src/boost/libs/hana/example/duplicate.cpp
new file mode 100644 (file)
index 0000000..449ddc3
--- /dev/null
+++ b/ceph/src/boost/libs/hana/example/duplicate.cpp
@@ -0,0 +1,14 @@
+// Copyright Louis Dionne 2013-2016
+// 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/duplicate.hpp>
+#include <boost/hana/extract.hpp>
+#include <boost/hana/lazy.hpp>
+namespace hana = boost::hana;
+
+
+int main() {
+    constexpr auto very_lazy = hana::duplicate(hana::make_lazy(3));
+    static_assert(hana::extract(hana::extract(very_lazy)) == 3, "");
+}