Regexp match any uppercase characters except a particular string

Question

I want to match all lines that have any uppercase characters in them but ignoring the string A_

To add to the complication I want to ignore everything after a different string, e.g. an open comment

Here are examples of what should and shouldnt match

Matches:

• fooBar
• foo Bar foo
• A_fooBar
• fooBar /* Comment */

Non Matches (C_ should not trigger a match)

• A_foobar
• foo A_bar
• foobar
• foo bar foo bar
• foobar /* Comment */

thanks :)

Answer 1

This should (also?) do it:

(?!A_)[A-Z](?!((?!/\*).)*\*/)

A short explanation:

(?!A_)[A-Z]     # if no 'A_' can be seen, match any uppercase letter
(?!             # start negative look ahead
  ((?!/\*).)    #   if no '/*' can be seen, match any character (except line breaks)
  *             #   match zero or more of the previous match
  \*/           #   match '*/'
)               # end negative look ahead

So, in plain English:

Match any uppercase except 'A_' and also not an uppercase if '*/' can be seen without first encountering '/*'.