[clang] [clang] Fix comma location tracking inside ParenListExpr. (PR #199411)

[Nicola Vetrini via cfe-commits]

nvetrini wrote:

Hi, are there other suggestions? After reflecting a bit on the approach proposed by @ojhunt I think that it won't fit my usecase all that well, since I'd like to have accurate locations from clang in all cases. I can understand memory concerns, though they do not seem too excessive to me. I can run some benchmarks, though I'm not quite sure how.

https://github.com/llvm/llvm-project/pull/199411