I really thought that the "Show in preprocessor" of the 10.2A architect was a great feature... Until I needed it the first time. I really thought that it would be a great feature when trying to understand a complex preprocessor construct... that does NOT compile.
Guess what, I just ran into such a situation and the proprocessor view simply said: File has compilation problems. Yes, I knew that already! But the file is not shown.
I'll log a bug for that.
(And I hope this does not start yet another don't use preprocessor discussion.)