address void pointer and test issue

Author: Chen, Brox

sycl/include/sycl/ext/oneapi/experimental/annotated_ptr/annotated_ptr.hpp

@@ -238,7 +238,7 @@ __SYCL_TYPE(annotated_ptr) annotated_ptr<T, detail::properties_t<Props...>> {
   annotated_ptr(const annotated_ptr &) = default;
   annotated_ptr &operator=(const annotated_ptr &) = default;
 
-  static_assert(std::is_trivially_copyable_v<T>,
+  static_assert(std::is_same_v<T, void> || std::is_trivially_copyable_v<T>,
                 "encapsulating annotated_ptr with non-trivially-copyable is "
                 "not supported!");
 

sycl/test/extensions/annotated_ptr/annotated_ptr.cpp

@@ -164,7 +164,7 @@ void TestVectorAddWithAnnotatedMMHosts() {
     test(int n_) : n(n_) {}
     test(const test &t) { n = t.n; }
   };
-  // expected-warning@+1 {{T is non-trivially copyable type, some operatorsmight invoke the copy constructor}}
+  // expected-error@+1 {{encapsulating annotated_ptr with non-trivially-copyable is not supported}}
   annotated_ptr<test> non_trivially_copyable;
 
   free(raw, q);