[eclipse-clp-users] How to expand domain of a variable

Hello!

How to expand existing domain of a variable?
I mean, I have a variable with some domain (say, 1..10), and I want to
allow that variable to have values from that domain or from another
domain, like 20..30.

I tried things like
N :: [1..10], get_domain(N, D), N :: D or N :: [20..30].
but unsurprisingly it doesn't work.

Of course I can write just
N :: [1..10] or N :: [20..30].
but I want to add ranges to domain iteratively (in a cycle).

Sergey.