Implement N3672, optional<T>.

llvm-svn: 189772

1 files changed, 37 insertions, 0 deletions

diff --git a/libcxx/test/utilities/optional/optional.bad_optional_access/copy_assign.pass.cpp b/libcxx/test/utilities/optional/optional.bad_optional_access/copy_assign.pass.cpp
new file mode 100644
index 00000000000..353bbe438f8
--- /dev/null
+++ b/libcxx/test/utilities/optional/optional.bad_optional_access/copy_assign.pass.cpp
@@ -0,0 +1,37 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <optional>
+
+// class bad_optional_access;
+// bad_optional_access& operator=(const bad_optional_access&);
+
+#include <optional>
+#include <string>
+#include <cstring>
+#include <type_traits>
+#include <cassert>
+
+#if _LIBCPP_STD_VER > 11
+
+#endif  // _LIBCPP_STD_VER > 11
+
+int main()
+{
+#if _LIBCPP_STD_VER > 11
+    static_assert(std::is_nothrow_copy_assignable<std::bad_optional_access>::value, "");
+    const std::string s1("one message");
+    const std::string s2("another message");
+    std::bad_optional_access e1(s1);
+    std::bad_optional_access e2(s2);
+    assert(std::strcmp(e1.what(), e2.what()) != 0);
+    e1 = e2;
+    assert(std::strcmp(e1.what(), e2.what()) == 0);
+#endif  // _LIBCPP_STD_VER > 11
+}