On Sun, Dec 25, 2016 at 12:21 AM, Alexander Ilin <[email protected]> wrote:
>
> That's a very useful feature, and it seems to be there for five years! But
> why is it not described or even mentioned?
I don't know why it's not documented but it looks like an anonymous
form of UNION:. The following is equivalent:
UNION: string-or-false string POSTPONE: f ;
TUPLE: foo { name string-or-false } ;
and:
TUPLE: foo { name maybe{ string } } ;
--
http://bluishcoder.co.nz
------------------------------------------------------------------------------
Developer Access Program for Intel Xeon Phi Processors
Access to Intel Xeon Phi processor-based developer platforms.
With one year of Intel Parallel Studio XE.
Training and support from Colfax.
Order your platform today.http://sdm.link/intel
_______________________________________________
Factor-talk mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/factor-talk
