From: Josh Cheek <josh.cheek@...>
Date: 2012-02-09T09:39:18+09:00
Subject: Re: Using _ like in Scala?

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On Wed, Feb 8, 2012 at 9:57 AM, Robert Klemme <shortcutter@googlemail.com>wrote:

> On Wed, Feb 8, 2012 at 4:30 PM, Josh Cheek <josh.cheek@gmail.com> wrote:
> > On Wed, Feb 8, 2012 at 5:58 AM, Robert Klemme <
> shortcutter@googlemail.com>wrote:
> >
> >> On Wed, Feb 8, 2012 at 3:43 AM, Josh Cheek <josh.cheek@gmail.com>
> wrote:
> >> > On Tue, Feb 7, 2012 at 9:15 AM, Robert Klemme <
> >> shortcutter@googlemail.com>wrote:
> >> >
> >> >> > Although what I'd really like would be a syntax for naming inline
> >> blocks,
> >> >> > then my editor could fold the block body inside the name, something
> >> like
> >> >> > %w[apple banana orange].each display
> >> >> >
> >> >> > And it would expand to something like
> >> >> > %w[apple banana orange].each { |display -> fruit| puts fruit }
> >> >>
> >> >> How would the above be derived from the line further up?
> >> >>
> >> > The name would have no impact on the language, it is still just a
> block
> >> > which takes one argument. It exists to help the developer (and be
> used by
> >> > the editor).
> >>
> >> Hmm...  Maybe I wasn't clear enough.  I was trying to ask how any
> >> automated mechanism could read
> >>
> >> %w[apple banana orange].each display
> >>
> >> and know it must make
> >>
> >> %w[apple banana orange].each { |display -> fruit| puts fruit }
> >>
> >> from it.  I am asking specifically since "puts" is nowhere mentioned
> >> in the line above.  So even if the syntax would be allowed there would
> >> have to be some ruling which leads to an interpretation equivalent to
> >> the second line.
> >>
> >>
> > Not sure about other editors, but TextMate knows what context it is in if
> > you write something like `[].each { |e| }` put your cursor before the e
> and
> > press C-P, it tells you variable.other.block.ruby. So it knows when it is
> > in block paramaters, it would just need to then understand that within
> this
> > context, if it sees something like `|name -> var|` that "name" is the
> name
> > of this block, and then just allow for block folding. It actually already
> > does all this
> > https://s3.amazonaws.com/josh.cheek/images/scratch/block_folding.png but
> > instead of showing '...' it could show 'name ...'
>
> So you are talking about an editor feature and not a language feature?
>  I am starting to get an idea of where I misunderstood you... :-)
>
>
Yes, what I want is an editor feature (it's also a cognitive aid, even
without an editor to take advantage of it), but it requires a language
feature to enable.

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