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

[Nhat Nguyen via cfe-commits]

changkhothuychung wrote:

> Can you fill in the description for this? That very much needs to be filled in, with context/strategy/etc. Also, did you implement this yourself, or is this an attempt to get Dan's implementation merged?

Hi! Yeah let me fill in the description. I referenced Dan's POC for this work so its an attempt to get his implementation merged.

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