1 files changed, 24 insertions, 0 deletions
diff --git a/src/boost/libs/hana/test/core/when.cpp b/src/boost/libs/hana/test/core/when.cpp
new file mode 100644
index 000000000..c8fead5e0
--- /dev/null
+++ b/src/boost/libs/hana/test/core/when.cpp
@@ -0,0 +1,24 @@
+// 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/core/when.hpp>
+namespace hana = boost::hana;
+
+
+template <typename T, typename = hana::when<true>>
+struct base_template;
+
+template <typename T>
+struct base_template<T, hana::when_valid<typename T::first_type>> { };
+
+template <typename T>
+struct base_template<T, hana::when_valid<typename T::second_type>> { };
+
+struct First { struct first_type; };
+struct Second { struct second_type; };
+
+template struct base_template<First>;
+template struct base_template<Second>;
+
+int main() { }