> arrays are by far the most common type of range, I think that it's > just asking > for trouble to allow their front or back to be used with parens.
Except you ebrace the idea that front is a function (property or not) and make parens work in all cases. Why not do it the other way round, front has to be a function property or not. Seems to work far better, it is a simple rule. No performance penalty as trivial set/get can easily be lined in, ...
