Add <optional> header.

This patch is largely thanks to Casey Carter @ Microsoft. He did the initial
work of porting our experimental implementation and tests over to namespace
std.

llvm-svn: 283977

1 files changed, 23 insertions, 0 deletions

diff --git a/libcxx/test/std/utilities/optional/optional.bad_optional_access/default.pass.cpp b/libcxx/test/std/utilities/optional/optional.bad_optional_access/default.pass.cpp
new file mode 100644
index 00000000000..e3c7bb5ad27
--- /dev/null
+++ b/libcxx/test/std/utilities/optional/optional.bad_optional_access/default.pass.cpp
@@ -0,0 +1,23 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03, c++11, c++14
+
+// <optional>
+
+// class bad_optional_access is default constructible
+
+#include <optional>
+#include <type_traits>
+
+int main()
+{
+    using std::bad_optional_access;
+    bad_optional_access ex;
+}