> How does one distinguish between an absent value and a value of null (e.g., > as a list element)?
In the current ForStatement: "for (i, x in y)" getIndexVariable() returns i (or null if "i," is omitted) getValueVariable() returns x getCollectionExpression() returns y "for (int i = 0; i < n; ++i) ..." getIndexVariable() returns null getValueVariable() returns null getCollectionExpression() returns a ClosureListExpression that contains all of "int i = 0; i < n; ++i" — why it's called "closure list" must be a legacy thing
