libc++ implements its' hash objects as deriving from std::unary_function, and the tests test for that. STL @ MS pointed out that the standard doesn't requie these objects to derive from unary_function, and so the tests should not require that either. Change the tests to check for the embedded typedefs - which ARE required. No change to the library.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@225403 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/thread/thread.threads/thread.thread.class/thread.thread.id/thread_id.pass.cpp

@@ -28,6 +28,8 @@ int main()
     std::thread::id id1;
     std::thread::id id2 = std::this_thread::get_id();
     typedef std::hash<std::thread::id> H;
+    static_assert((std::is_same<typename H::argument_type, std::thread::id>::value), "" );
+    static_assert((std::is_same<typename H::result_type, std::size_t>::value), "" );
     H h;
     assert(h(id1) != h(id2));
 }