Clojurians Log v2

Need some help with my grammar. I have this (simplified):

pattern = (<whitespace>? token)*
<token> = word | cat
cat = pattern <whitespace> <'.'> <whitespace> pattern
whitespace = #"\s+"
word = #"[a-zA-Z]+"

[:pattern
 [:word "a"]
 [:cat
  [:pattern [:word "b"]]
  [:pattern]]
 [:word "c"]]

[:pattern
 [:cat
  [:pattern [:word "a"] [:word "b"]]
  [:pattern [:word "c"]]]]

Make your grammar unambiguous, given that input, both what instaparse gives and what you expect are valid parses according to your grammar, I would expect if you asked instaparse for all the parses instead of just taking the first one it comes up with you would get both trees

You have essentially two loops in your grammar, one is implicit in using * at the end of pattern, and the other goes pattern -> token -> cat -> pattern

And those overlap in what they recognize

Thanks, that worked