[clang] [clang-tools-extra] [llvm] [clang]: reflection operator parsing for global namespace and primitive types (PR #164692)

[Younan Zhang via llvm-commits]

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@@ -12938,6 +12938,12 @@ ExprResult TreeTransform<Derived>::TransformSYCLUniqueStableNameExpr(
       E->getLocation(), E->getLParenLocation(), E->getRParenLocation(), NewT);
 }
 
+template <typename Derived>
+ExprResult TreeTransform<Derived>::TransformCXXReflectExpr(CXXReflectExpr *E) {
+  // No subexpressions to recurse over in PR1.
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zyn0217 wrote:

```suggestion
  // TODO(reflection): Implement its transform
```

Also I'd suggest you leave a `llvm_unreachable` here in case this is forgotten somehow in future

https://github.com/llvm/llvm-project/pull/164692