1 files changed, 74 insertions, 0 deletions
diff --git a/libcxx/test/std/thread/futures/futures.unique_future/copy_assign.fail.cpp b/libcxx/test/std/thread/futures/futures.unique_future/copy_assign.fail.cpp
new file mode 100644
index 00000000000..ebdcbf98d99
--- /dev/null
+++ b/libcxx/test/std/thread/futures/futures.unique_future/copy_assign.fail.cpp
@@ -0,0 +1,74 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <future>
+
+// class future<R>
+
+// future& operator=(const future&) = delete;
+
+#include <future>
+#include <cassert>
+
+int main()
+{
+#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
+    {
+        typedef int T;
+        std::promise<T> p;
+        std::future<T> f0 = p.get_future();
+        std::future<T> f;
+        f = f0;
+        assert(!f0.valid());
+        assert(f.valid());
+    }
+    {
+        typedef int T;
+        std::future<T> f0;
+        std::future<T> f;
+        f = f0;
+        assert(!f0.valid());
+        assert(!f.valid());
+    }
+    {
+        typedef int& T;
+        std::promise<T> p;
+        std::future<T> f0 = p.get_future();
+        std::future<T> f;
+        f = f0;
+        assert(!f0.valid());
+        assert(f.valid());
+    }
+    {
+        typedef int& T;
+        std::future<T> f0;
+        std::future<T> f;
+        f = f0;
+        assert(!f0.valid());
+        assert(!f.valid());
+    }
+    {
+        typedef void T;
+        std::promise<T> p;
+        std::future<T> f0 = p.get_future();
+        std::future<T> f;
+        f = f0;
+        assert(!f0.valid());
+        assert(f.valid());
+    }
+    {
+        typedef void T;
+        std::future<T> f0;
+        std::future<T> f;
+        f = f0;
+        assert(!f0.valid());
+        assert(!f.valid());
+    }
+#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
+}