fixup! [clang] Allow parentheses around CTAD declarators

Add test for CWG2376

Author: offsetof

clang/test/CXX/drs/cwg23xx.cpp

@@ -379,6 +379,20 @@ class C {
 };
 } // namespace cwg2370
 
+namespace cwg2376 { // cwg2376: 21
+#if __cpp_deduction_guides >= 201703
+template<int = 0> class C {};
+
+C a;
+const volatile C b = C<2>();
+C (c) = {};
+C* d;
+// expected-error@-1 {{cannot form pointer to deduced class template specialization type}}
+C e[1];
+// expected-error@-1 {{cannot form array of deduced class template specialization type}}
+#endif
+}
+
 namespace cwg2386 { // cwg2386: 9
 // Otherwise, if the qualified-id std::tuple_size<E> names a complete class
 // type **with a member value**, the expression std::tuple_size<E>::value shall

clang/www/cxx_dr_status.html

@@ -14091,7 +14091,7 @@ <h2 id="cxxdr">C++ defect report implementation status</h2>
     <td><a href="https://cplusplus.github.io/CWG/issues/2376.html">2376</a></td>
     <td>CD5</td>
     <td>Class template argument deduction with array declarator</td>
-    <td class="unknown" align="center">Unknown</td>
+    <td class="unreleased" align="center">Clang 21</td>
   </tr>
   <tr id="2377">
     <td><a href="https://cplusplus.github.io/CWG/issues/2377.html">2377</a></td>