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

[Erich Keane via llvm-commits]

erichkeane wrote:

> > If reflection is 'experimental' anything we change that breaks serialization/etc is perfectly fine.
> 
> If this is the decision, I think it will be better to explicitly diagnose for any code path that triggers serialization

That seems pretty novel?  We don't typically diagnose that sort of thing.

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