1 files changed, 51 insertions, 0 deletions
diff --git a/libcxx/test/std/utilities/function.objects/refwrap/unwrap_reference.pass.cpp b/libcxx/test/std/utilities/function.objects/refwrap/unwrap_reference.pass.cpp
new file mode 100644
index 00000000000..441ddf4bd56
--- /dev/null
+++ b/libcxx/test/std/utilities/function.objects/refwrap/unwrap_reference.pass.cpp
@@ -0,0 +1,51 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <functional>
+//
+// template <class T>
+// struct unwrap_reference;
+//
+// template <class T>
+// using unwrap_reference_t = typename unwrap_reference<T>::type;
+
+// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
+
+#include <functional>
+#include <type_traits>
+
+
+template <typename T, typename Expected>
+void check_equal() {
+  static_assert(std::is_same_v<typename std::unwrap_reference<T>::type, Expected>);
+  static_assert(std::is_same_v<typename std::unwrap_reference<T>::type, std::unwrap_reference_t<T>>);
+}
+
+template <typename T>
+void check() {
+  check_equal<T, T>();
+  check_equal<T&, T&>();
+  check_equal<T const, T const>();
+  check_equal<T const&, T const&>();
+
+  check_equal<std::reference_wrapper<T>, T&>();
+  check_equal<std::reference_wrapper<T const>, T const&>();
+}
+
+struct T { };
+
+int main() {
+  check<T>();
+  check<int>();
+  check<float>();
+
+  check<T*>();
+  check<int*>();
+  check<float*>();
+}