Ah of course, that makes sense now! Such a newbie mistake :/
Yes, I am aware of the conventions on constructor words, and use them myself.
As to the why, there isn't a practical one really!
The purpose was to separate and encapsulate the initialization details of the
superclass, having new call an initialize method on the new instance. It's a
"Smalltalk-ism" on my side...
Thank you!
El Sábado, 20 de agosto, 2016 2:23:06, John Benediktsson <mrj...@gmail.com>
escribió:
Well, when you specify ``M: no-news``, you are telling the system to dispatch
off an instance of the ``no-news`` class.
So this works as you expect in your example:
IN: scratchpad T{ no-news } new . T{ no-news f "same one" }
That's because ``no-news`` is a tuple-class:
IN: scratchpad no-news tuple-class? . t
But not a ``no-news``:
IN: scratchpad no-news no-news? . f
Why are you trying to override ``new``? Typically we just provide constructor
words, either automatically generating with ``C: <no-news> no-news`` or using
``new`` or ``boa`` in a ``<no-news>`` word:
: <no-news> ( field -- no-news )
do-something-to-field no-news boa ;
Hope that helps,
John.
On Fri, Aug 19, 2016 at 12:49 PM, fede s <elfeder...@yahoo.com.ar> wrote:
Hi
I see "new" is a generic word, with the regular behavior set as a method for
object.I tried specializing it on other tuple class, but it didn't work.
TUPLE: no-news field ; : same-one ( -- t ) T{ no-news f "same one" } ; M:
no-news new drop same-one ;
I expect this:
no-news new
==>T{ no-news f "same one" }
But i got this: no-news new
==>T{ no-news f f }
USE: generic \ new order
==> { tuple-class no-news }
no-news \ new lookup-method
==> M\ no-news new
I think there's something wrong here?
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