[REBOL] Re: Set-words and refinements
From: brett:codeconscious at: 14-Nov-2000 22:33
Oops. Sorry Andrew. I didn't make myself clear.
Here's the example again.
date/month: date/month + 1
handles year rollovers (at least forward)
as in
>> date: now
== 14-Nov-2000/22:20:53+11:00
>> date
== 14-Nov-2000/22:20:53+11:00
>> date/month: date/month + 2
== 13
>> date
== 14-Jan-2001/22:20:53+11:00
>>
So the interesting bit to me is the rollover-handling functionality of dates
during set-word. Let's say I wanted to create an object similar in
functionality to the date datatype. At the moment I think that I would have
to define a function set-month
that would do the rollover handling. So my object would be set like
mydate/set-month mydate/month + 1
Wouldn't it be nice if I could create my object and when I set a word in it
using the normal set-word syntax it calls a function to handle the change
instead of creating calling the setter function explicity
Then mydate could utilise the same set-word syntax as the date datatype.
Waddya reckon?
Brett.
