[squeak-dev] Re: printing collections

Eliot Miranda eliot.miranda at gmail.com
Tue Nov 3 21:22:08 UTC 2009


On Tue, Nov 3, 2009 at 1:06 PM, Nicolas Cellier <
nicolas.cellier.aka.nice at gmail.com> wrote:

> 2009/11/3 Andreas Raab <andreas.raab at gmx.de>:
> > Nicolas Cellier wrote:
> >>
> >> While at isSelfEvaluating, I wonder why we do not abuse {..} notation
> >> a bit more.
> >> Instead of printing 'aSet( 0 at 0 1 at 2 )'
> >> we could just make it evaluate proof '{0 at 0. 1 at 2} asSet'
> >>
> >> Of course, with limited stream, we take the risk of loosing trailing '
> >> asSet' information.
> >> So we can also print using a less nice but still evaluating 'Set
> >> newFrom: {0 at 0. 1 at 2}'.
> >>
> >> As a bonus, generalizing this behaviour might also eliminate a few
> >> bytecodes and methods from the Kernel.
> >>
> >> Same for storeOn:
> >>
> >> What do you think ?
> >
> > -1. The goal of printing isn't to make parsing easier. In fact I find
> this
> > to be the least useful application of {} - the advantage of the syntax
> form
> > is that it is immediately recognized and consequently requires less
> effort
> > than having "an Array(". That you can also evaluate it in some situations
> is
> > a useful side effect but no more.
> >
> > Cheers,
> >  - Andreas
> >
>
> OK, I see ' newFrom: ' can be considered as noise, so we can't have
> our cake and eat it too ?
> I find the fact that simple objects print as a simple code snippet
> such a nice feature though...
> Set << {0 at 0. 1 at 2} would be short, but I guess introducing a new binary
> selector will be hard to sell :)
>

yuck.  asSet is readable and in the Smalltalk tradition.  << sMLells ;)


> Nicolas
>
>
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