Whitespace as syntax (was Re: Python Rocks!)

[Alex]

> For example, when doing matrix computations reordering the operations
> can save enormous amounts of memory and time; teaching CL to
> transparently find good multiplication orders for matrices is a
> straightforward project of a week or so for a single Lisp hacker. The
> comparable effort in C++ is staggering; look at the Blitz++ libraries
> for how much work it takes. (And it's not even possible in Java.)

What aspect of Java prevents makes this sort of programming impossible? 

Alex.