1 files changed, 24 insertions, 0 deletions
diff --git a/src/boost/libs/hana/example/detail/wrong.cpp b/src/boost/libs/hana/example/detail/wrong.cpp
new file mode 100644
index 000000000..2b603c623
--- /dev/null
+++ b/src/boost/libs/hana/example/detail/wrong.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/detail/wrong.hpp>
+namespace hana = boost::hana;
+
+
+template <typename T, typename U>
+struct base_template {
+    // Can't write this because the assertion would always fire up:
+    // static_assert(false, "...");
+
+    // So instead we write this:
+    static_assert(hana::detail::wrong<base_template<T, U>>::value,
+    "base_template does not have a valid default definition");
+};
+
+template <>
+struct base_template<int, int> {
+    // something useful
+};
+
+int main() { }