Hi I feel this might be a bug, can anyone confirm or suggest a fix?
Here's a minimal usage of `command-line` form:
```
#lang typed/racket
(define *message* : (Parameterof (Listof String)) (make-parameter '()))
(define *verbose* : (Parameterof Boolean) (make-parameter #f))
(define (parse-cmdline
Hi all,
In my course here on campus, I have students use #lang racket and we put
#:transparent on our struct definitions for easier REPL interactions. A
student was confused by the different printer-behavior between a and b in
the attached screenshot, and I can't think of a reason for the differe
The printer tries to produce an expression that you could copy, paste, and
evaluate. Transparent structs aren't quotable but do support
constructor-style printing, so the printer uses constructor-style printing
for values that contain transparent structs. (Apparently you can configure
this in DrRac
Austin Sparks (cc:ed) and I are struggling with what I believe should be a
pretty simple problem; how can we share a value between a DrRacket tool and a
user’s program? Specifically, the value in question here is a channel (probably
an asynchronous channel) on which the user’s thread can place
Ah, got it, makes perfect sense through that lens -- thanks!
On Tue, May 16, 2017 at 9:37 AM, Philip McGrath
wrote:
> The printer tries to produce an expression that you could copy, paste, and
> evaluate. Transparent structs aren't quotable but do support
> constructor-style printing, so the pri
John, Austin,
You can use loggers for this. The `data` argument to `log-message`
allows payloads to be carried along with log messages. Just have the
user program log messages with a particular topic, and have the tool
listen on that topic.
That's how the optimization coach (which is a DrRacket t
If you have control of the language<%> class, then you can do that via
the on-execute method. If you want to do that for all languages (which
is probably not a good idea, but you could use this approach and limit
it to a known set of languages), you could override the on-execute
method of the rep<%
I have a macro that wraps a function call in some debugging information. I
would like to discard the results of the function call so that they don't
end up printed. This usually works:
(void (func))
...but it fails if func uses (values) to return multiple values, since void
is variadic but no
Try `(call-with-values func void)`
http://docs.racket-lang.org/reference/values.html#%28def._%28%28quote._~23~25kernel%29._call-with-values%29%29
On Tue, May 16, 2017 at 5:56 PM, David Storrs
wrote:
> I have a macro that wraps a function call in some debugging information.
> I would like to dis
Well, that was simpler than expected. (As is usually the case with
Racket.) Thanks, Ben.
On Tue, May 16, 2017 at 5:59 PM, Ben Greenman
wrote:
> Try `(call-with-values func void)`
>
> http://docs.racket-lang.org/reference/values.html#%28def._
> %28%28quote._~23~25kernel%29._call-with-values%29%
> On May 16, 2017, at 11:23 AM, Vincent St-Amour
> wrote:
>
> John, Austin,
>
> You can use loggers for this. The `data` argument to `log-message`
> allows payloads to be carried along with log messages. Just have the
> user program log messages with a particular topic, and have the tool
> lis
> On May 16, 2017, at 11:26 AM, Robby Findler
> wrote:
>
> If you have control of the language<%> class, then you can do that via
> the on-execute method. If you want to do that for all languages (which
> is probably not a good idea, but you could use this approach and limit
> it to a known set
On Tue, May 16, 2017 at 7:07 PM, 'John Clements' via Racket Users
wrote:
>
>> On May 16, 2017, at 11:26 AM, Robby Findler
>> wrote:
>>
>> If you have control of the language<%> class, then you can do that via
>> the on-execute method. If you want to do that for all languages (which
>> is probabl
On Tuesday, May 16, 2017 at 12:47:37 AM UTC-7, kay wrote:
> Hi I feel this might be a bug, can anyone confirm or suggest a fix?
>
> Here's a minimal usage of `command-line` form:
>
> ```
> #lang typed/racket
>
> (define *message* : (Parameterof (Listof String)) (make-parameter '()))
> (define *v
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