[libc++] [test] Add a missing `()` in TestEachIntegralType.

diff --git a/libcxx/test/support/atomic_helpers.h b/libcxx/test/support/atomic_helpers.h
index a5c1703..3a71c09 100644 (file)
--- a/libcxx/test/support/atomic_helpers.h
+++ b/libcxx/test/support/atomic_helpers.h
@@ -77,7 +77,7 @@ struct TestEachIntegralType {
     TestFunctor<unsigned long>()();
     TestFunctor<long long>()();
     TestFunctor<unsigned long long>()();
-    TestFunctor<wchar_t>();
+    TestFunctor<wchar_t>()();
 #if TEST_STD_VER > 17 && defined(__cpp_char8_t)
     TestFunctor<char8_t>()();
 #endif