Try to start with this:
#lang racket ;; new-lang.rkt
(provide
#%app
#%datum
#%top-interaction
(rename-out
(new-lambda lambda)
(new-mb #%module-begin)))
(define-syntax (new-lambda stx)
(syntax-case stx ()
[(_ (x ...) e ...)
#'(lam '(x ...) '(e ...) (lambda (x ...) e ...)
On Tuesday, May 23, 2017 at 7:17:18 PM UTC-6, Matthias Felleisen wrote:
> Why do you interpret S-expressions instead of re-mapping lambda and #%app?
>
>
>
>
>
> > On May 23, 2017, at 9:14 PM, Vityou wrote:
> >
> > I might be able to do something like this, but what I'm looking for is
> > s
> After the `killall` from tty2, did the shell you started DrRacket from have
> any output?
>
> Thanks for helping us investigate!
>
> Vincent
Unfortunately not. After going to tty2, entering "killall drracket" and back
to tty1, the terminal was as I left it, with just the command "drracket"
Why do you interpret S-expressions instead of re-mapping lambda and #%app?
> On May 23, 2017, at 9:14 PM, Vityou wrote:
>
> I might be able to do something like this, but what I'm looking for is
> something that will be able to show the variables available to it in adition
> to its sourc
I might be able to do something like this, but what I'm looking for is
something that will be able to show the variables available to it in adition to
its source. I'll probable have to do something like what you did with the
struct accept add a field with its available variables and modify #%ap
I think you will probably want to define an applicable struct type with
custom printing behavior and then replace Racket's lambda with your own
macro to create instances of that struct type. I think what you want may be
more complex than this, but here's an example that simply carries along its
own
Hi Rast
the mouse event object of editor% and snip% is always the one passed to the
on-event method of editor-canvas% (that's why event handlers of snip% have
lots of extra arguments to provide you the location information,
racket/snip do the computing for you). When it is used with a snip%
instan
In lambda calculus, the function is the only datatype, so it would be useful to
see the body of a function when it is returned in some expression in the repl
(so you can see what number was returned or some other encoding). I have got
this working by making a language where the reader turns the
Ah -- my apologies: the command was supposed to be only on a single line
with only a single space after the word "location" and the open quote
character. Can you try that again?
Robby
On Tue, May 23, 2017 at 10:01 AM j.da...@t-online.de
wrote:
> Hello,
>
> thank you!
>
> I get:
>
> Last login:
On Tue, 23 May 2017 06:35:58 -0500,
Alasdair McAndrew wrote:
>
> On Tuesday, 23 May 2017 21:06:17 UTC+10, Robby Findler wrote:
> > If you start DrRacket from the shell, trigger the bad behavior and then
> > type control-c in the shell, do you get any output?
> >
> >
> > Robby
> >
> Thanks for
Hi Philip,
I don't think you can express the contract boundary you have in mind
using the generics library as it is.
The blame you see for both contracts makes sense. In the first case,
`string-server` is not protecting itself from bad inputs (uses `any/c`)
yet promises to return a string. It rig
You're running Windows 10 Creators Update? Unfortunately, we do not
have a workaround. Microsoft has accepted my bug report, but that's all
the feedback we have so far.
You can find more information here:
https://github.com/racket/racket/issues/1671
At Tue, 23 May 2017 07:36:54 -0700 (PDT), E
Dr Racket seems to crash on my windows laptop every-time I use the
two-finger-scroll. Not only does it crash the app, but also my entire laptop.
It then deletes everything I'm working on. I get the blue screen with the stop
code UNEXPECTED_KERNEL_MODE_TRAP.
Wondering what I can do to fix this
Hi,
For me personally, coordinates are probably the most unintuitive aspect
of Racket's GUI management. The problem comes up again and again, and I
never get it right, so maybe someone can clarify this once and for all.
I have a mouse-event% in on-event of a snip% and would like to display
a floa
What happens if you open up a terminal window and paste this command in?
/usr/bin/osascript -e 'open location
"file:///Applications/Racket%20v6.9/doc/index.html"'
Robby
On Sun, May 21, 2017 at 4:34 AM, wrote:
> I get an error when trying to get Help Desk or Dr Racket Documentation from
>
I get an error when trying to get Help Desk or Dr Racket Documentation from the
menu. I get following error:
Thank you
Juergen Dabel
Schrobenhausen
Germany
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When trying to get the docs from the Dr Racket menu I get>:
Juergen Dabel
Schrobenhausen
Germany
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On Tuesday, 23 May 2017 21:06:17 UTC+10, Robby Findler wrote:
> If you start DrRacket from the shell, trigger the bad behavior and then type
> control-c in the shell, do you get any output?
>
>
> Robby
>
Thanks for the suggestion - which I had in fact tried, to no avail. DrRacket
froze, and
If you start DrRacket from the shell, trigger the bad behavior and then
type control-c in the shell, do you get any output?
Robby
On Tue, May 23, 2017 at 5:11 AM Alasdair McAndrew wrote:
> I have had no problem running DrRacket on linux, under KDE Plasma, until
> now. But now it seems to crash
I have had no problem running DrRacket on linux, under KDE Plasma, until now.
But now it seems to crash constantly. All I need to do is:
1. Open it up from the KDE menu
2. Open up the File menu
and then it freezes, and also causes a system freeze, as it appears to be using
100% of CPU (accord
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