Regex for Grammar

# regex for http://stackoverflow.com/questions/3349999/net-regex-recursive-patterns

^(?:
    (\w(?<Q>)) # Q1
    |
    (<(?<Angler>))  #Q2 - start <
    |
    (\>(?<-Angler>)(?<-A>)?(?<Q>))  #Q2 - end >, match Q
    |
    (\[(?<Block>))  # Q3 start - [
    |
    (;(?<Semi-Block>)(?<-A>)?)  #Q3 - ; after [
    |
    (,(?<Comma-Semi>)(?<-Q>)*)  #Q3 - , after ;
    |
    (\]((?<-Semi>)|(?<-Comma>))(?<-Q>)*(?<Q>))  #Q3 ] after ;, match Q
    |
    ( ((,|(?<-Q>))*(?<A>)) )   #Match an A group
)*$
# Post Conditions
(?(Angler)(?!))
(?(Block)(?!))
(?(Semi)(?!))
(?(Comma)(?!))