Re: [open-axiom-devel] [Axiom-developer] Re: [fricas-devel] Re: iterators and cartesian product.

[Ralf Hemmecke]

> | It looks like mathematical expression {matrix ... | (a,b,c,d) in {1..9}^4}.

Unfortunately, I don't have the time at the moment, but I really don't
see why one cannot have something like

for x in (1..3)^3 repeat {
   (a,b,c) := x;
   stdout << "(" << a, "," << b << "," << c << ")" << newline;
}

in Aldor *now* which would print something like

(1,1,1)
(1,1,2)
(1,1,3)
(1,2,1)
(1,2,2)
(1,2,3)
...

The "trick" would be to turn

  (1..3)^3

into a

  Generator Cross(Integer, Integer, Integer)

or something . That is not too difficult. (If you are really interested
ask me again next week, then I might have a little more time to actually
provide the code.)

So the syntax is there only the functionality is not available in any
library. One has to program it oneself.

Ralf