[clang] [Clang] Handle default template arguments for alias CTAD guides (PR #134807)

[via cfe-commits]

================
@@ -771,3 +771,42 @@ D d(24);
 // CHECK-NEXT:  `-ParmVarDecl {{.+}} 'U'
 
 } // namespace GH132616_DeductionGuide
+
+namespace GH133132 {
+
+template <class _Ty>
+struct A {};
+
+template <class T = int, class U = T>
+using AA = A<U>;
----------------
cor3ntin wrote:

Can you add a template template parameter test?

https://github.com/llvm/llvm-project/pull/134807