1 files changed, 118 insertions, 0 deletions
diff --git a/test/std/utilities/tuple/tuple.tuple/tuple.cnstr/convert_copy.pass.cpp b/test/std/utilities/tuple/tuple.tuple/tuple.cnstr/convert_copy.pass.cpp
new file mode 100644
index 0000000000000..5ad4f9227f481
--- /dev/null
+++ b/test/std/utilities/tuple/tuple.tuple/tuple.cnstr/convert_copy.pass.cpp
@@ -0,0 +1,118 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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(const tuple<UTypes...>& u);
+
+// UNSUPPORTED: c++98, c++03
+
+#include <tuple>
+#include <utility>
+#include <string>
+#include <cassert>
+
+struct B
+{
+    int id_;
+
+    explicit B(int i) : id_(i) {}
+};
+
+struct D
+    : B
+{
+    explicit D(int i) : B(i) {}
+};
+
+#if _LIBCPP_STD_VER > 11 
+
+struct A
+{
+    int id_;
+
+    constexpr A(int i) : id_(i) {}
+    friend constexpr bool operator==(const A& x, const A& y) {return x.id_ == y.id_;}
+};
+
+struct C
+{
+    int id_;
+
+    constexpr explicit C(int i) : id_(i) {}
+    friend constexpr bool operator==(const C& x, const C& y) {return x.id_ == y.id_;}
+};
+
+#endif
+
+int main()
+{
+    {
+        typedef std::tuple<double> T0;
+        typedef std::tuple<int> T1;
+        T0 t0(2.5);
+        T1 t1 = t0;
+        assert(std::get<0>(t1) == 2);
+    }
+#if _LIBCPP_STD_VER > 11 
+    {
+        typedef std::tuple<double> T0;
+        typedef std::tuple<A> T1;
+        constexpr T0 t0(2.5);
+        constexpr T1 t1 = t0;
+        static_assert(std::get<0>(t1) == 2, "");
+    }
+    {
+        typedef std::tuple<int> T0;
+        typedef std::tuple<C> T1;
+        constexpr T0 t0(2);
+        constexpr T1 t1{t0};
+        static_assert(std::get<0>(t1) == C(2), "");
+    }
+#endif
+    {
+        typedef std::tuple<double, char> T0;
+        typedef std::tuple<int, int> T1;
+        T0 t0(2.5, 'a');
+        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 = t0;
+        assert(std::get<0>(t1) == 2);
+        assert(std::get<1>(t1) == int('a'));
+        assert(std::get<2>(t1).id_ == 3);
+    }
+    {
+        D d(3);
+        typedef std::tuple<double, char, D&> T0;
+        typedef std::tuple<int, int, B&> T1;
+        T0 t0(2.5, 'a', d);
+        T1 t1 = t0;
+        d.id_ = 2;
+        assert(std::get<0>(t1) == 2);
+        assert(std::get<1>(t1) == int('a'));
+        assert(std::get<2>(t1).id_ == 2);
+    }
+    {
+        typedef std::tuple<double, char, int> T0;
+        typedef std::tuple<int, int, B> T1;
+        T0 t0(2.5, 'a', 3);
+        T1 t1(t0);
+        assert(std::get<0>(t1) == 2);
+        assert(std::get<1>(t1) == int('a'));
+        assert(std::get<2>(t1).id_ == 3);
+    }
+}