[racket] future

in my standard prelude I use ==> as as an expression thunkafier macro.

2011/8/29 Greg Hendershott <greghendershott at gmail.com>

> > it wouldn't be necessary to create all these duplicate forms to avoid
> > writing (lambda () ...) This would cut down on code, and also make the
> > language more consistent.
>
> I think Noel has it exactly right.
>
> The common concept is "thunk".
>
> The desire is, how to say it more succinctly.
>
> Surely there should be one way to say it more succinctly, which works
> with many forms?  As opposed to many forms each needing its variation
> to say the one thing more succinctly?
>
>
> So: How to say it more succinctly than (lambda () e)?  Or even the
> i-can-haz-unicode way, (λ () e)?
>
> (thunk e) is a first approximation. But, "thunk" is jargon, and it's
> barely more succinct than (lambda () e).
>
> So, how about any of these as the super succinct way:
> (() e)
> (\ e)
> (λ e)
>
> ??
>
> Actually I'm fine with (lambda () e) or (λ () e). I don't think a
> couple extra parens are horrible, or I'd be writing C# or
> cortex-fudge. And I don't think it's horrible for functions to be
> first-class, and to express "here's some stuff to do" as "here's a
> function".
>
> 2011/8/29 Noel Welsh <noelwelsh at gmail.com>:
> > On Mon, Aug 29, 2011 at 8:05 PM, Eli Barzilay <eli at barzilay.org> wrote:
> >> There's also the semi-popular syntax extension change, like {E ...}
> >> expanding to (λ () E ...), but that looks very confusing with
> >> something like (thread {(printf "foo\n")}) -- so maybe do that with
> >> the outer form: {thread (printf "foo\n")}.  Or maybe do that with a
> >> macro instead: (e thread (printf "foo\n")), which will probably go the
> >> way of `nested'.
> >
> > Yeah, what about solving the problem of lambda's verbosity directly?
> > If fn or \ was shorthand for lambda, or
> >
> > { a1 ... | expr ... }
> >
> > expanded to
> >
> > (lambda (a1 ...) expr ...)
> >
> > it wouldn't be necessary to create all these duplicate forms to avoid
> > writing (lambda () ...) This would cut down on code, and also make the
> > language more consistent.
> >
> > N.
> >
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