User blog comment:Wythagoras/Dollar Function: new version/@comment-25418284-20131023195019/@comment-5529393-20131024031711

Wythagoras, if you are not crazy about trees, you could still describe your notation in a more procedural fashion. e.g. "If (such and such) is true, apply this rule." Right now we have to go through the rules one by one to see which rule applies to a particular expression.