[libcxx] Add <experimental/type_traits> for LFTS

Summary:
This adds the <experimental/type_traits> (minus invocation traits). Mostly just the `_v` traits.


Reviewers: K-ballo, mclow.lists

Reviewed By: mclow.lists

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D5742

llvm-svn: 224626

1 files changed, 20 insertions, 0 deletions

diff --git a/libcxx/test/experimental/utilities/meta/version.pass.cpp b/libcxx/test/experimental/utilities/meta/version.pass.cpp
new file mode 100644
index 00000000000..593fb52a4c3
--- /dev/null
+++ b/libcxx/test/experimental/utilities/meta/version.pass.cpp
@@ -0,0 +1,20 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <experimental/type_traits>
+
+#include <experimental/type_traits>
+
+#ifndef _LIBCPP_VERSION
+#error _LIBCPP_VERSION not defined
+#endif
+
+int main()
+{
+}