vendor/libc++/libc++-release_370-r246257

1 files changed, 44 insertions, 0 deletions

diff --git a/test/std/utilities/tuple/tuple.tuple/tuple.cnstr/const_pair.pass.cpp b/test/std/utilities/tuple/tuple.tuple/tuple.cnstr/const_pair.pass.cpp
new file mode 100644
index 0000000000000..740b6589e5114
--- /dev/null
+++ b/test/std/utilities/tuple/tuple.tuple/tuple.cnstr/const_pair.pass.cpp
@@ -0,0 +1,44 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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 U1, class U2> tuple(const pair<U1, U2>& u);
+
+// UNSUPPORTED: c++98, c++03
+
+#include <tuple>
+#include <utility>
+#include <cassert>
+
+int main()
+{
+    {
+        typedef std::pair<double, char> T0;
+        typedef std::tuple<int, short> T1;
+        T0 t0(2.5, 'a');
+        T1 t1 = t0;
+        assert(std::get<0>(t1) == 2);
+        assert(std::get<1>(t1) == short('a'));
+    }
+#if _LIBCPP_STD_VER > 11 
+    {
+        typedef std::pair<double, char> P0;
+        typedef std::tuple<int, short> T1;
+        constexpr P0 p0(2.5, 'a');
+        constexpr T1 t1 = p0;
+        static_assert(std::get<0>(t1) != std::get<0>(p0), "");
+        static_assert(std::get<1>(t1) == std::get<1>(p0), "");
+        static_assert(std::get<0>(t1) == 2, "");
+        static_assert(std::get<1>(t1) == short('a'), "");
+    }
+#endif
+}