generators, was: Re: iterators and cartesian product.

"Bill Page" <[email protected]> writes:

> > > Can you give an example of an "element of type Generator(Something)"
> > > that is not a domain?
> >
> > g: Generator(Integer) := generate {yield 0}
> >
> > Take g.
> >
> 
> Ok, yes I see what you mean. 


Just curious: can something of type Generator(Something) ever be a domain?
(Probably yes...)

> But this requires some new basic functionality in the language, right?

YES.  But, it is one of the goals to improve SPAD anyway.  OK, I can only hope
that our compiler gurus have already enough expertise.  The only thing I can do
is to advertise the language design of Aldor...

I was looking into how generators are implemented in lisp.  One of the most
promising links I found is

http://groups.google.com/group/comp.lang.lisp/browse_thread/thread/fbda37620268811/c558bf7e6feb5d55?hl=en&lnk=st&q=generator+monadic+continuations+defun#

The code in the final message looks really short, but I did not yet understand
it.

Martin