6/13    Dear computer scientists, do you prefer to use the more complicated
        but potentially rich abstract syntax tree to traverse through nodes,
        add attributes, pass in/out flow sets for flow analysis, or do you
        prefer the simplicity of using top-down traversal of syntax directed
        translation? What are the pros/cons of using either method?
        \_ I had Hilfinger for nodes and trees.  I no longer care about nodes
           and trees.  I now understand there is more to life than nodes and
           trees.  The nice doctors are helping me.