1 files changed, 35 insertions, 0 deletions
diff --git a/test/libcxx/thread/thread.mutex/thread.lock/thread.lock.guard/variadic_mutex_mangling.pass.cpp b/test/libcxx/thread/thread.mutex/thread.lock/thread.lock.guard/variadic_mutex_mangling.pass.cpp
new file mode 100644
index 000000000000..aae0afbffd37
--- /dev/null
+++ b/test/libcxx/thread/thread.mutex/thread.lock/thread.lock.guard/variadic_mutex_mangling.pass.cpp
@@ -0,0 +1,35 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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: libcpp-has-no-threads
+
+// TODO(EricWF) Investigate why typeid(...).name() returns a different string
+// on GCC 4.9 but not newer GCCs.
+// XFAIL: gcc-4.9
+
+// THIS TESTS C++03 EXTENSIONS.
+
+// <mutex>
+
+// template <class ...Mutex> class lock_guard;
+
+// Test that the the variadic lock guard implementation mangles the same in
+// C++11 and C++03. This is important since the mangling of `lock_guard` depends
+// on it being declared as a variadic template, even in C++03.
+
+#define _LIBCPP_ABI_VARIADIC_LOCK_GUARD
+#include <mutex>
+#include <string>
+#include <typeinfo>
+#include <cassert>
+
+int main() {
+    const std::string expect = "NSt3__110lock_guardIJNS_5mutexEEEE";
+    assert(typeid(std::lock_guard<std::mutex>).name() == expect);
+}