1 files changed, 21 insertions, 0 deletions
diff --git a/src/boost/libs/hana/example/then.cpp b/src/boost/libs/hana/example/then.cpp
new file mode 100644
index 00000000..40c192c1
--- /dev/null
+++ b/src/boost/libs/hana/example/then.cpp
@@ -0,0 +1,21 @@
+// 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/equal.hpp>
+#include <boost/hana/then.hpp>
+#include <boost/hana/tuple.hpp>
+namespace hana = boost::hana;
+
+
+struct undefined { };
+static_assert(
+    hana::then(hana::make_tuple(undefined{}, undefined{}), hana::make_tuple(1, 2, 3))
+        ==
+    hana::make_tuple(
+        1, 2, 3,
+        1, 2, 3
+    )
+, "");
+
+int main() { }