[clang] [Clang] Substitute for the type aliases inside of a CTAD guide (PR #94740)

[Younan Zhang via cfe-commits]

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@@ -16,3 +16,73 @@ using T = A<void>::B<int>;
 
 using Copy = decltype(copy);
 using Copy = A<void>::B<int>;
+
+namespace GH94614 {
+
+template <class, class> struct S {};
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zyn0217 wrote:

Yeah, and I've even tried `#pragma clang __debug dump param,` which doesn't work either...

I was expecting we could dump the TypeLoc through some command lines, but unfortunately, this isn't the case.

https://github.com/llvm/llvm-project/pull/94740