Filling out regex tests...

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@110955 91177308-0d34-0410-b5e6-96231b3b80d8

test/re/re.syn/wregex.pass.cpp

@@ -0,0 +1,20 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <regex>
+
+// typedef basic_regex<wchar_t> wregex;
+
+#include <regex>
+#include <type_traits>
+
+int main()
+{
+    static_assert((std::is_same<std::basic_regex<wchar_t>, std::wregex>::value), "");
+}