1 files changed, 54 insertions, 0 deletions
diff --git a/src/boost/libs/hana/test/detail/decay.cpp b/src/boost/libs/hana/test/detail/decay.cpp
new file mode 100644
index 000000000..bc1ec5b60
--- /dev/null
+++ b/src/boost/libs/hana/test/detail/decay.cpp
@@ -0,0 +1,54 @@
+// 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/decay.hpp>
+
+#include <type_traits>
+namespace hana = boost::hana;
+
+
+template <typename T, typename Decayed>
+void check() {
+    static_assert(std::is_same<
+        typename hana::detail::decay<T>::type,
+        Decayed
+    >::value, "");
+}
+
+int main() {
+    // void is untouched
+    check<void, void>();
+
+    // normal types lose cv-qualifiers
+    check<int, int>();
+    check<int const, int>();
+    check<int const volatile, int>();
+
+    // [cv-qualified] references are stripped
+    check<int&, int>();
+    check<int const&, int>();
+    check<int&&, int>();
+    check<int const&&, int>();
+
+    // pointers are untouched
+    check<int*, int*>();
+    check<int const*, int const*>();
+    check<int volatile*, int volatile*>();
+    check<int const volatile*, int const volatile*>();
+
+    // arrays decay to pointers
+    check<int[], int*>();
+    check<int[10], int*>();
+    check<int const[10], int const*>();
+    check<int volatile[10], int volatile*>();
+    check<int const volatile[10], int const volatile*>();
+
+    // functions decay to function pointers
+    check<void(), void(*)()>();
+    check<void(...), void (*)(...)>();
+    check<void(int), void(*)(int)>();
+    check<void(int, ...), void(*)(int, ...)>();
+    check<void(int, float), void(*)(int, float)>();
+    check<void(int, float, ...), void(*)(int, float, ...)>();
+}