[clang] [Feat] Allow Finding across only parts of an AST. (PR #127423)

[Michael Spencer via cfe-commits]

Bigcheese wrote:

Is there a particular reason to have this be a generic predicate rather than just a bool of if other modules should be visited? I can see how you could do other things with it like skipping a namespace or something, but I'm not sure if the other use cases would actually see use.

If there is a reason for a generic predicate, then I think this implementation is fine.

https://github.com/llvm/llvm-project/pull/127423