1 files changed, 75 insertions, 0 deletions
diff --git a/libcxx/test/std/utilities/tuple/tuple.tuple/tuple.assign/convert_copy.pass.cpp b/libcxx/test/std/utilities/tuple/tuple.tuple/tuple.assign/convert_copy.pass.cpp
new file mode 100644
index 00000000000..a0848594d70
--- /dev/null
+++ b/libcxx/test/std/utilities/tuple/tuple.tuple/tuple.assign/convert_copy.pass.cpp
@@ -0,0 +1,75 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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... UTypes>
+//   tuple& operator=(const tuple<UTypes...>& u);
+
+#include <tuple>
+#include <string>
+#include <cassert>
+
+struct B
+{
+    int id_;
+
+    explicit B(int i = 0) : id_(i) {}
+};
+
+struct D
+    : B
+{
+    explicit D(int i = 0) : B(i) {}
+};
+
+int main()
+{
+    {
+        typedef std::tuple<double> T0;
+        typedef std::tuple<int> T1;
+        T0 t0(2.5);
+        T1 t1;
+        t1 = t0;
+        assert(std::get<0>(t1) == 2);
+    }
+    {
+        typedef std::tuple<double, char> T0;
+        typedef std::tuple<int, int> T1;
+        T0 t0(2.5, 'a');
+        T1 t1;
+        t1 = t0;
+        assert(std::get<0>(t1) == 2);
+        assert(std::get<1>(t1) == int('a'));
+    }
+    {
+        typedef std::tuple<double, char, D> T0;
+        typedef std::tuple<int, int, B> T1;
+        T0 t0(2.5, 'a', D(3));
+        T1 t1;
+        t1 = t0;
+        assert(std::get<0>(t1) == 2);
+        assert(std::get<1>(t1) == int('a'));
+        assert(std::get<2>(t1).id_ == 3);
+    }
+    {
+        D d(3);
+        D d2(2);
+        typedef std::tuple<double, char, D&> T0;
+        typedef std::tuple<int, int, B&> T1;
+        T0 t0(2.5, 'a', d2);
+        T1 t1(1.5, 'b', d);
+        t1 = t0;
+        assert(std::get<0>(t1) == 2);
+        assert(std::get<1>(t1) == int('a'));
+        assert(std::get<2>(t1).id_ == 2);
+    }
+}