From 61b9a7258a7693d7f3674a5a1daf7b036ff1d382 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Sun, 6 Sep 2015 18:46:46 +0000
Subject: Import libc++ 3.7.0 release (r246257).

---
 .../tuple.helper/tuple.include.utility.pass.cpp    | 49 ++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 test/std/utilities/tuple/tuple.tuple/tuple.helper/tuple.include.utility.pass.cpp

(limited to 'test/std/utilities/tuple/tuple.tuple/tuple.helper/tuple.include.utility.pass.cpp')

diff --git a/test/std/utilities/tuple/tuple.tuple/tuple.helper/tuple.include.utility.pass.cpp b/test/std/utilities/tuple/tuple.tuple/tuple.helper/tuple.include.utility.pass.cpp
new file mode 100644
index 0000000000000..8c8357d95d994
--- /dev/null
+++ b/test/std/utilities/tuple/tuple.tuple/tuple.helper/tuple.include.utility.pass.cpp
@@ -0,0 +1,49 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <tuple>
+
+// template <class... Types> class tuple;
+
+// template <class... Types>
+//   class tuple_size<tuple<Types...>>
+//     : public integral_constant<size_t, sizeof...(Types)> { };
+//
+//  LWG #2212 says that tuple_size and tuple_element must be 
+//     available after including <utility>
+
+#include <utility>
+#include <type_traits>
+
+template <class T, std::size_t N, class U, size_t idx>
+void test()
+{
+    static_assert((std::is_base_of<std::integral_constant<std::size_t, N>,
+                                   std::tuple_size<T> >::value), "");
+    static_assert((std::is_base_of<std::integral_constant<std::size_t, N>,
+                                   std::tuple_size<const T> >::value), "");
+    static_assert((std::is_base_of<std::integral_constant<std::size_t, N>,
+                                   std::tuple_size<volatile T> >::value), "");
+    static_assert((std::is_base_of<std::integral_constant<std::size_t, N>,
+                                   std::tuple_size<const volatile T> >::value), "");
+    static_assert((std::is_same<typename std::tuple_element<idx, T>::type, U>::value), "");
+    static_assert((std::is_same<typename std::tuple_element<idx, const T>::type, const U>::value), "");
+    static_assert((std::is_same<typename std::tuple_element<idx, volatile T>::type, volatile U>::value), "");
+    static_assert((std::is_same<typename std::tuple_element<idx, const volatile T>::type, const volatile U>::value), "");
+}
+
+int main()
+{
+    test<std::pair<int, int>, 2, int, 0>();
+    test<std::pair<int, int>, 2, int, 1>();
+    test<std::pair<const int, int>, 2, int, 1>();
+    test<std::pair<int, volatile int>, 2, volatile int, 1>();
+    test<std::pair<char *, int>, 2, char *, 0>();
+    test<std::pair<char *, int>, 2, int,    1>();
+}
-- 
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