I have attached the java antlr grammar that I found on the web. I am trying to use this grammar to create an AST tree. My problem is how I will modify this grammar so that I get a 2D AST tree instead of getting only one root and all other nodes as children of that particular root. In other words I want a multilevel tree
I tried to write the rewrite rules but I got more confused. Isnt there a ready grammar which does what I am asking?