There are several ways to do this, and they each have their uses depending on
what you want to do with it.
One is with a syntax-class:
#lang racket
(require syntax/parse)
(define-splicing-syntax-class my-keyword
[pattern (~seq #:my-keyword) #:attr kw #t]
[pattern (~seq) #:attr kw #f])
On Apr 15, 2015, at 2:29 PM, Jon Zeppieri zeppi...@gmail.com wrote:
I'm trying to provide a struct, the struct type of which uses
prop:procedure and prop:match-expander, and I'd like the procedure to
have a contract.
On Apr 15, 2015, at 10:12 PM, Jon Zeppieri zeppi...@gmail.com wrote:
Flatt wrote:
At Tue, 14 Apr 2015 21:04:38 -0400, Alexander D. Knauth wrote:
On Apr 14, 2015, at 6:57 PM, Matthew Flatt mfl...@cs.utah.edu wrote:
This is the kind of problem that the readtable argument to
`read/recursive` was meant to solve, but I see that it doesn't work in
this case.
I
On Apr 15, 2015, at 10:12 PM, Jon Zeppieri zeppi...@gmail.com wrote:
On Wed, Apr 15, 2015 at 9:35 PM, Alexander D. Knauth
alexan...@knauth.org wrote:
On Apr 15, 2015, at 2:29 PM, Jon Zeppieri zeppi...@gmail.com wrote:
I'm trying to provide a struct, the struct type of which uses
I did try that, but no.
On Apr 14, 2015, at 3:03 AM, Robby Findler ro...@eecs.northwestern.edu wrote:
Do you see a message appearing in stdout of DrRacket? (It would be in
console.app on a Mac.)
Robby
On Monday, April 13, 2015, Alexander D. Knauth alexan...@knauth.org wrote:
DrRacket
/shape/polygon.rkt:490:21: Type Checker: Summary: 2 errors
encountered in:
time
time
I guess you see something else?
On Tue, Apr 14, 2015 at 5:31 AM, Alexander D. Knauth
alexan...@knauth.org wrote:
I did try that, but no.
On Apr 14, 2015, at 3:03 AM, Robby Findler ro
) is easy enough to add, but the result
isn't pretty and it doesn't seem much more general. Does it sound
useful enough to you?
At Mon, 13 Apr 2015 16:51:45 -0400, Alexander D. Knauth wrote:
Ok, I guess that makes sense.
I do have `(` mapped to something other than the default
PM, Alexander D. Knauth
alexan...@knauth.org wrote:
Or a simpler way of achieving the same thing would be to replace the `time`s
in pict3d/private/engine/shape/polygon.rk that were giving you errors, with
`(cast time Nonnegative-Flonum)`, but when I do that, it works fine.
On Apr 14
On Apr 14, 2015, at 7:08 PM, Héctor Mc soulras...@gmail.com wrote:
Hey community
In advance sorry for the english, don't speak the language.
I'm student and begin to work the thesis and chose to do it in racket.
It's about a code generator of web aplications (prototype). The problem that
Checker: Summary: 2 errors
encountered in:
time
time
On Apr 14, 2015, at 5:15 PM, Alexander D. Knauth alexan...@knauth.org wrote:
It says, version 6.2.0.2--2015-04-07(23ec573/a) [3m], but I also updated the
drracket, gui-lib, and scribble-lib pkgs from the github repos since then to
get
. Can you say more about
exactly which version of drracket you're using and how you installed
pict3d?
Robby
On Tue, Apr 14, 2015 at 3:20 PM, Alexander D. Knauth
alexan...@knauth.org wrote:
I open DrRacket, then open pict3d/private/gui/typed-pict3d-combinators.rkt,
and then I wait a few
Or a simpler way of achieving the same thing would be to replace the `time`s in
pict3d/private/engine/shape/polygon.rk that were giving you errors, with `(cast
time Nonnegative-Flonum)`, but when I do that, it works fine.
On Apr 14, 2015, at 5:43 PM, Alexander D. Knauth alexan...@knauth.org
(make-readtable #f #\! #\( #f)])
(read (open-input-string #hash!!x . 1)
So, the issue in your example is that `(` is mapped to something other
than the default meaning of `(`.
At Mon, 13 Apr 2015 16:20:04 -0400, Alexander D. Knauth wrote:
But if it does that, then why should
DrRacket is freezing on me a lot, but I’m not sure if it’s because of a problem
in DrRacket, Typed Racket, Pict3d, or something else.
If I open DrRacket, open pict3d/private/gui/typed-pict3d-combinators.rkt, which
is a typed racket file, with background expansion turned on, if I wait a few
]
It's difficult to say just how much those things matter, and there are
trade-offs in flexibility and error reporting, but that's why the
reader works the way it does currently.
At Sun, 12 Apr 2015 08:54:16 -0400, Alexander D. Knauth wrote:
For something like this:
#lang racket
(define orig
For something like this:
#lang racket
(define orig-readtable (current-readtable))
(parameterize ([current-readtable
(make-readtable orig-readtable
#\( 'terminating-macro
(λ (c in src ln col pos)
the immediate `$` behave
like `@` without affecting other `$`s within the parentheses.
At Sat, 11 Apr 2015 11:40:57 -0400, Alexander D. Knauth wrote:
For this:
#lang racket/base
(require scribble/reader)
(read/recursive (open-input-string (@x)) #f (make-at-readtable))
I expected it to produce
For this:
#lang racket/base
(require scribble/reader)
(read/recursive (open-input-string (@x)) #f (make-at-readtable))
I expected it to produce ‘(x), but instead it produces ‘(@x).
Is this a bug, or is this just not what read/recursive was intended for, or ?
--
You received this message
that and some interactivity improvements. It now
looks backwards for a symbol so if you type ahead by a few parens and
spaces, it'll still pick up the keyword.
(It may be a while before the pkg server updates.)
Robby
On Tue, Apr 7, 2015 at 9:18 PM, Alexander D. Knauth
alexan...@knauth.org
I downloaded the new snapshot as soon as I could to try it out. Thank you!
This is my new favorite thing about DrRacket!
On Apr 7, 2015, at 7:55 AM, Robby Findler ro...@eecs.northwestern.edu wrote:
If you have a recent snapshot build then you can say raco pkg update
drracket. It should
Now I’m wondering: would you be able to extend this to the repl in the
interactions panel?
On Apr 6, 2015, at 6:46 PM, Robby Findler ro...@eecs.northwestern.edu wrote:
I've just pushed a change to DrRacket to do that. Thanks for the
prompting; it helped me realize a better approach than what
I was running into a problem with using streams in typed racket, where I was
using the Sequenceof type to represent streams, and they got turned into
non-stream sequences, which don’t work for stream-specific operations.
I think what's causing it is this:
#lang racket
(define/contract my-stream
On Apr 4, 2015, at 11:22 AM, Jos Koot jos.k...@gmail.com wrote:
The following puzzles me:
#lang racket
(define plus +)
(free-identifier=? #'+ #'plus) ; - #f
#lang racket
(define-syntax (a stx)
(syntax-case stx ()
((_) (datum-syntax stx (free-identifier=? #'+ #'plus)
(define
Is there a way to define a syntax-class so that for example in:
(syntax-parse stx
[(_ a:stxcls) ….])
It would be able to know that it was used with a, instead of for instance b in
b:stxcls?
Is that possible?
If not, would it be a good idea to add?
The reason I ask is that then it might be
On Apr 4, 2015, at 5:26 PM, Erik Silkensen eriksilken...@gmail.com wrote:
Could someone explain how this example works?
$ racket
Welcome to Racket v6.1.1.
- (require racket/sandbox)
- (define racket-eval (make-evaluator 'racket))
- (define a (racket-eval '(set 1 2 3)))
- a
(set 1 2 3)
On Apr 3, 2015, at 4:40 AM, Gour g...@atmarama.net wrote:
I've found the following:
Sadly, RacketGUI lacks some advanced controls I often want:
trees
tables containing controls in cells
However the list-box% control supports cells that only contain text.
tree-tables
“
On Apr 3, 2015, at 8:56 AM, Alexander D. Knauth alexan...@knauth.org wrote:
On Apr 3, 2015, at 4:40 AM, Gour g...@atmarama.net wrote:
I've found the following:
Sadly, RacketGUI lacks some advanced controls I often want:
trees
tables containing controls in cells
However
For my exact-decimal meta-language, I had some tests that depend on the
read-decimal-as-inexact parameter being set to #f by configure-runtime.
It seems like raco test isn’t running that before running the tests. Is that
intentional?
(by the way the tests are not within a test submodule)
--
On Mar 30, 2015, at 10:16 PM, Robby Findler ro...@eecs.northwestern.edu wrote:
On Monday, March 30, 2015, Alexander D. Knauth alexan...@knauth.org wrote:
Well the point of using the configure-runtime was that it would run when it
was the “main program so that exact-decimals would work
think you can use that facility
to implement the exact-decimal language.
Robby
On Mon, Mar 30, 2015 at 8:56 PM, Alexander D. Knauth
alexan...@knauth.org wrote:
For my exact-decimal meta-language, I had some tests that depend on the
read-decimal-as-inexact parameter being set to #f
On Mar 28, 2015, at 8:02 AM, Alexander D. Knauth alexan...@knauth.org wrote:
Oh.
I forgot that try-racket didn’t call current-print within the sandbox.
In that case maybe you could, in addition, change this line:
https://github.com/jarcane/try-racket/blob/master/main.rkt#L75
) and not '(1 2 3) or (mcons 1( mcons
2...
Just like DrRacket in r5rs language do!
Any idea what to do?
Sent from my iPhone
On 28 Mar 2015, at 00:44, Alexander D. Knauth alexan...@knauth.org wrote:
Does this changing this line to `(make-evaluator ‘(special r5rs)` do what
you want?
https
On Mar 27, 2015, at 8:51 PM, Alexander D. Knauth alexan...@knauth.org wrote:
Does changing it do this do what you want?
(make-evaluator '(special r5rs) '(require r5rs/init)
And I forgot, also add a [current-print write] to the parameterize form?
On Mar 27, 2015, at 8:26 PM, Chrakhan
Does this changing this line to `(make-evaluator ‘(special r5rs)` do what you
want?
https://github.com/jarcane/try-racket/blob/master/main.rkt#L53
On Mar 27, 2015, at 6:44 PM, Chrakhan Barzanji chrakhan.barza...@gmail.com
wrote:
hi,
as you may know in TryRacket the language of the REPL is
101 - 134 of 134 matches
Mail list logo
