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Artjom Kossow [email protected] [concatenative] scripsit:
> 2. Postfix, right-to-left evaluation
> This one is used, as far as I know only in Ripple
> <https://github.com/joshsh/ripple>. Values, execution tokens and such
> are pushed onto the stack and only evalueted once explicit apply "." is
> encountered. Are there any direct advantages to that scheme, aside from the
> "inehrent" lazyness for all operations (say: we save some quoting here and
> there...)?
In general, laziness is of small benefit in itself: Haskell folks say that
laziness is to keep them honest about purity. Though of course there are
some programs that benefit from it directly, there are probably just as
many that suffer.
It also seems obvious that postfix RTL is equivalent to prefix LTR.
> 4. Prefix, right-to-left evaluation
> I guess this is totally useless and not possible, right? :)
No, it would be the same as plain old postfix LTR.
--
John Cowan http://www.ccil.org/~cowan [email protected]
In politics, obedience and support are the same thing. --Hannah Arendt
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<p>Artjom Kossow [email protected] [concatenative] scripsit:<br>
<br>
> 2. Postfix, right-to-left evaluation<br>
> This one is used, as far as I know only in Ripple<br>
> <https://github.com/joshsh/ripple>. Values, execution tokens and such<br>
> are pushed onto the stack and only evalueted once explicit apply "." is<br>
> encountered. Are there any direct advantages to that scheme, aside from the<br>
> "inehrent" lazyness for all operations (say: we save some quoting here and<br>
> there...)?<br>
<br>
In general, laziness is of small benefit in itself: Haskell folks say that<br>
laziness is to keep them honest about purity. Though of course there are<br>
some programs that benefit from it directly, there are probably just as<br>
many that suffer.<br>
<br>
It also seems obvious that postfix RTL is equivalent to prefix LTR.<br>
<br>
> 4. Prefix, right-to-left evaluation<br>
> I guess this is totally useless and not possible, right? :)<br>
<br>
No, it would be the same as plain old postfix LTR.<br>
<br>
-- <br>
John Cowan http://www.ccil.org/~cowan [email protected]<br>
In politics, obedience and support are the same thing. --Hannah Arendt<br>
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