1 files changed, 45 insertions, 0 deletions
diff --git a/test/std/experimental/utilities/tuple/tuple_size_v.pass.cpp b/test/std/experimental/utilities/tuple/tuple_size_v.pass.cpp
new file mode 100644
index 000000000000..d7a5aa679fcd
--- /dev/null
+++ b/test/std/experimental/utilities/tuple/tuple_size_v.pass.cpp
@@ -0,0 +1,45 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03, c++11
+
+// <experimental/tuple>
+
+// template <class T> constexpr size_t tuple_size_v = tuple_size<T>::value;
+
+#include <experimental/tuple>
+#include <utility>
+#include <array>
+
+namespace ex = std::experimental;
+
+template <class Tuple, int Expect>
+void test()
+{
+    static_assert(ex::tuple_size_v<Tuple> == Expect, "");
+    static_assert(ex::tuple_size_v<Tuple> == std::tuple_size<Tuple>::value, "");
+    static_assert(ex::tuple_size_v<Tuple const> == std::tuple_size<Tuple>::value, "");
+    static_assert(ex::tuple_size_v<Tuple volatile> == std::tuple_size<Tuple>::value, "");
+    static_assert(ex::tuple_size_v<Tuple const volatile> == std::tuple_size<Tuple>::value, "");
+}
+
+int main()
+{
+    test<std::tuple<>, 0>();
+
+    test<std::tuple<int>, 1>();
+    test<std::array<int, 1>, 1>();
+
+    test<std::tuple<int, int>, 2>();
+    test<std::pair<int, int>, 2>();
+    test<std::array<int, 2>, 2>();
+
+    test<std::tuple<int, int, int>, 3>();
+    test<std::array<int, 3>, 3>();
+}