>You need to pass info up the parse tree so that after parsing, you have a new data structure with everything nicely structured ready to ACT UPON. I (and many

>You need to pass info up the parse tree so that after parsing, you have a new data structure with everything nicely structured ready to ACT UPON. I (and many others) prefer to keep these passes relatively distinct. Parse tree -> AST -> Internal Representation -> (Generation of Output / Interpretation)