Hello,
I try to require the plotting library (let alone use it) in
a non-X Linux session:
$ ssh localhost
$ racket
Welcome to Racket v6.1.1.8.
(require plot)
Gtk initialization failed for display :0
context...:
/opt/racket/share/pkgs/gui-lib/mred/private/wx/gtk/queue.rkt:
[running body]
Leif,
You can always use the plot/no-gui collection:
http://docs.racket-lang.org/plot/plotting.html?q=plot%2Fno-gui#%28mod-path._plot%2Fno-gui%29
This should work without the need for X11.
Thank you, that is exactly what I need.
Best regards,
Dmitry
--
You received this message because
Matthew,
More than a week has passed since I updated my
installation of Racket. Good news: no crashes
since the update.
Most probably the bug that you fixed was causing the crash.
Best regards,
Dmitry
On 10/31/2015 06:23 AM, Dmitry Pavlov wrote:
Matthew,
Before upgrading to the version
Matthew,
unsafe-extfllong_double_mult: unsupported on this platform
FWIW, my actual program is a C program that uses a Racket library
obtained with raco ctool. I can provide you more details and a
reproducible example if the above is not enough to hunt down
the cause.
I think the problem is
Matthew,
[...] So, if the immediate
repair doesn't solve the problem for you, a follow-up change might.
[...]
Is it e3d78e4, or it is to be done yet?
Yes, it's e3d78e4.
I hate to tell you this, but the error still remains in the
latest nightly build, Windows i386:
>racket
Welcome to
Matthew,
On 11/13/2015 06:33 PM, Matthew Flatt wrote:
I've pushed a change that may solve this problem.
The change was to the way that `--runtime` determines a shared path
prefix among runtime files, so that it can copy them to a new place but
keep relative paths intact. On Windows, the paths
The more interesting thing is that the 'longdouble.dll' is not put
into the runtime directory by 64-bit Racket, too. Still, the 64-bit
program works without any additional effort.
Oops, sorry, I just checked again, the 64-bit Racket fails too.
I think you'll need to call
JIT-compiled.
At Thu, 15 Oct 2015 11:56:21 +0300, Dmitry Pavlov wrote:
Matthew,
It seems that I have lost my grip on the crash.
It has not happened for almost a week---neither with the version
that I build myself, nor with the nightly build where I definitely
saw it. I did not update Racket
h string there anymore, so I do not know what to do.
Regards,
Dmitry
On 09/21/2015 08:13 AM, Dmitry Pavlov wrote:
I just tried the 32-bit Utah snapshot and 32-bit C app -- build OK,
but the app crashed right on scheme_main_setup with zero pointer
access. It did not even enter my "r
Moreover: I just built Racket from github source on 32-bit Linux with
--enable-extflonum switch to ./configure, and the build version
somehow misses the extflonums:
Actually, not from the github source, but from the snapshot "source +
built packages". I guess it should not matter, though.
Hello,
I vaguely remember that extflonum support was supposed to be turned
off by default in 32-bit Linux releases. OK. But current 32-bit Windows
nightly builds do not provide it either. I did not notice when they
stopped to provide it.
Moreover: I just built Racket from github source on
Matthew,
On 11/13/2015 06:25 PM, Matthew Flatt wrote:
At Thu, 12 Nov 2015 19:11:28 +0300, Dmitry Pavlov wrote:
The more interesting thing is that the 'longdouble.dll' is not put
into the runtime directory by 64-bit Racket, too. Still, the 64-bit
program works without any additional effort
Matthew
On 11/17/2015 03:50 PM, Matthew Flatt wrote:
I found another place where case-normalization of paths was not handled
correctly.
Your example now works for me with a snapshot build. Can you try the
latest?
Yes the latest build works! Thank you very much.
The case can be finally
Hello,
I just created a C program that uses my Racket library via
Racket's embedding mechanism, and it works fantastic.
Now I am wondering---how to ship my C program's
executable if the underlying Racket library has runtime
paths in it? The executable seems to have been set up for
absolute
At Wed, 16 Sep 2015 14:26:41 +0300, Dmitry Pavlov wrote:
Hello,
I just created a C program that uses my Racket library via
Racket's embedding mechanism, and it works fantastic.
Now I am wondering---how to ship my C program's
executable if the underlying Racket library has runtime
paths in it? The
Also, if it matters, I usually make my Windows builds on Linux
with MinGW (i686-w64-mingw32-gcc, x86_64-w64-mingw32). But I can
use Visual Studio too, I guess, if that will make things easier
for raco distribute or whatever.
Best regards,
Dmitry
On 09/16/2015 03:52 PM, Dmitry Pavlov wrote
our
purposes.
At Tue, 15 Sep 2015 14:29:51 +0300, Dmitry Pavlov wrote:
Hello,
I just started to experiment with making my Racket library embeddable to
C programs [1]. The first thing I needed to do was to download
the Racket source code and compile the libracket3m.a. I wonder why the
maintainers do
Hello,
I just started to experiment with making my Racket library embeddable to
C programs [1]. The first thing I needed to do was to download
the Racket source code and compile the libracket3m.a. I wonder why the
maintainers do not put this file into the distribution? It seems that
as soon as
I just tried the 32-bit Utah snapshot and 32-bit C app -- build OK,
but the app crashed right on scheme_main_setup with zero pointer
access. It did not even enter my "run" function.
My initial guess is that it's related to thread-local storage and
missing instructions in "Inside". I'll look
Matthew,
I've added a `--runtime ` argument to `raco ctool --cmods`, which
gathers runtime files into and makes the embedded modules refer
to them in (which is expected to be relative to the executable,
but see also the `--runtime-access` option).
The embedding executable must call
,
Dmitry
On 09/15/2015 11:01 PM, Dmitry Pavlov wrote:
Matthew,
Sure I meant the full distribution.
Thanks, I hope that the consensus will be reached :)
Best regards,
Dmitry
On 09/15/2015 08:06 PM, Matthew Flatt wrote:
We left out "libracket3m.a" just to make the distribution smal
Hello,
I was just able to discover that my program crashes on the
nightly build 6.2.900.17, on Linux. The program has a heavy portion
of math, double and extended unsafe ops, and accesses multiple
low-level libraries. It has crashed after 4 hours of running,
while doing just the same that it had
Matthew,
On 09/21/2015 12:38 AM, Matthew Flatt wrote:
At Sun, 20 Sep 2015 23:53:42 +0300, Dmitry Pavlov wrote:
On Windows, though, I ran into a problem when linking my app
with pre-built libracket3m_9yy8mp.lib :
error LNK2001: unresolved external symbol __imp_scheme_get_mz_setjmp
places.)
If you can get any sort of crash report with a stack trace, that
information is often enough for me to either track down the problem or
at least say something about what parts of the example may be relevant.
Thanks,
Matthew
At Mon, 21 Sep 2015 00:08:43 +0300, Dmitry Pavlov wrote:
Hello,
I
Does anyone have an application using pasteboard%? I want to try one, and I’d
love to see an example.
A (bit underdone) spreadsheed editor using pasteboard% :
https://github.com/kugelblitz/spreadsheet-editor
Available in Racket via raco pkg install spreadsheet-editor
Regards,
Dmitry
that exclusively use
URLs ad bib entries :-)
— Matthias
On Dec 20, 2015, at 7:05 AM, Jay McCarthy <jay.mccar...@gmail.com> wrote:
Hi Dmitry,
This page describes what you should do:
http://racket-lang.org/tr/ > http://racket-lang.org/tr1/
On Sun, Dec 20, 2015 at 5:52 AM, Dmitry Pav
Hello,
I am writing a paper for a scientific journal. The results that I am
presenting there were obtained mostly in Racket. What is the best way to
give credit to Racket in references? Is there a specific paper I can
reference, or just link the website?
If specifics matter: I am heavily
RAI seems to be the closest to what I need to do. It has
a DSL with arrays and matrices, it generates C code,
and it even has automatic differentiation, according
to the docs. It is designed for DSP, but probably
can be extended to non-DSP programming. I should
look at it closer.
For the
Debian
"unstable" repo that I can sync to?
Best regards,
Dmitry
At Wed, 18 May 2016 23:37:02 +0300, Dmitry Pavlov wrote:
Matthew,
> One possible fix is to add the 'hscroll style to the horizontal panel.
> That change moves the program into "defined behavi
Matthew,
> One possible fix is to add the 'hscroll style to the horizontal panel.
> That change moves the program into "defined behavior" territory, since
> a scrolling panel allows its content to be wider than itself.
I just tried that and I see that it shows a scrollbar under the
panel that I
Matthew,
Second thought was to check the latest snapshot (d0d85b2, commit in
racket/racket made ~3h later than yours in racket/gui). That did not
work, too -- the commit of interest is not included into the snapshot.
That should have worked, and it looks to me like the change is included
in
Hello,
I would like to report two GUI issues; I do not know is they are related
or not. I ran against those issues while working on spreadsheet-editor.
The task is to clip a row of buttons (column buttons in my spreadsheet).
Below I reproduce the issue using a simpler configuration than I use
Dear Racketeers,
I, as a programmer in the area of numerics, just evolved to the state
where the following task seem reasonable to work on:
- I need to take (or invent) some DSL for numerical computations.
All I need is: variables and functions, vectors, loops,
arithmetics on numbers and
All,
Thank you very much for the provided references.
Robby, John, Jerzy: thanks for the pointer to Jeff Siskind.
His works on automatic differentiation are very interesting.
I should look at his Stalingrad software.
I did not think about automatic vs symbolic differentiation
before; now I am
Jack,
There exists a language that wasn't initially designed with racket in mind, but
could easily be a racket #lang. To interop with code already written in this
language, I wanted an easy way to run files that don't have the #lang line.
I had a very similar case when I had to create a
Jens,
Oddly, another installation of Racket 6.6 on 32-bit Windows XP not only
reproduced the error, but also gave a stack trace:
initialization for bitmap%: bad argument combination: 495 0 #f #t 1.25
context...:
C:\Program
ur machine?
At Fri, 29 Jul 2016 17:08:42 +0300, Dmitry Pavlov wrote:
Jens,
Oddly, another installation of Racket 6.6 on 32-bit Windows XP not only
reproduced the error, but also gave a stack trace:
initialization for bitmap%: bad argument combination: 495 0 #f #t 1.25
context...:
C:\Pro
David,
invalid symbol: 'hide-hscroll
given: '(hide-hscroll)
This is relatively new in Racket GUI. (Matthew added this option at my
request not long ago).
If you can update your Racket installation to the latest version, it is
probably the easiest way to get past this error.
Best
29 Jul 2016 10:08:46 -0500,
Dmitry Pavlov wrote:
Matthew,
Yes that works, thank!
Also I figured why the message did not show up on my "first" WinXP
installation: the spreadsheet-editor package has not been updated there.
Newer version of spreadsheet-editor sets (style '(hide-vscro
Matthew,
Did you timezone use daylight saving in 1996?
Oh, right.
I need UTC date and time; I assumed it is UTC since I passed #f for dst?
and 0 for time-zone-offset in (date). I missed the local-time? flag in
date->seconds, which is true by default.
So the corrected version of my code
Hello,
The surprise of the day for me is date->seconds
rejecting a particular time on a particular date.
(date->seconds (date 59 47 2 31 3 1996 0 0 #f 0))
This should be 1996, March 31, 02:47:59 am, correct?
It reports the following error:
find-seconds: non-existent date
wanted: (59 47 2
e, 2:47:59am on March 13, 2016 really did
not exist in my timezone.
At Thu, 20 Oct 2016 19:05:38 +0300, Dmitry Pavlov wrote:
> Hello,
>
> The surprise of the day for me is date->seconds
> rejecting a particular time on a particular date.
>
> (date-&
That was more intended as a rant about things that drive me batty than
actual instruction -- I hope it didn't come across as patronizing.
No, not at all.
One of the things that surprised me the most is that prior to 1925,
astronomers kept timestamps of their observations where day started
Konrad,
Is it compile-time or run-time errors?
Assuming compile-time, I would suggest an approach I took for a non-SEXP
language: call raise-syntax-error in the (custom) compiler, which runs
after parser and transforms syntax objects to other syntax objects. The
third argument of
Is it compile-time or run-time errors?
Mostly module-instantiation-time errors, which are closer to run-time
errors.
As a simple example, consider syntactically correct DSL code that
expands to
(define foo (first '()))
The call to first raises an exception, which is displayed without
-func with (my-func) disregarding
the circumstances" macro.
Just out of curiosity: is the latter possible?
Best regards,
Dmitry
On 11/19/2016 01:10 PM, Dmitry Pavlov wrote:
Hello,
I was wondering how I can define a macro that acts without parentheses.
Here is what I came up with:
(defin
Out of curiosity, why do you want this?
I have a bunch of parameters (in the Racket sense of the word)
that are "read-only" throughout the module, i.e. there are no
modifications via calls (parameter value).
Most of parameters' values are themselves functions.
So what I wanted to save a
Alex,
Using that your macro would be:
(define-syntax call-my-func
(make-variable-like-transformer #'(my-func)))
Perfect solution, thank you!
I read about make-rename-transformer, but make-variable-like-transformer
escaped me.
Best regards,
Dmitry
--
You received this message because
Without the macro, the last line would have been
(some-func ((parameter-1) some-arg)
The question comes when you would have used (parameter-1) in a higher-order
context. Do you want it to be equivalent to (parameter-1), or equivalent to
(lambda (arg ...) ((parameter-1) arg ...)) ?
In your
On 11/19/2016 11:45 PM, Alex Knauth wrote:
On Nov 19, 2016, at 1:51 PM, Dmitry Pavlov <dpav...@iaaras.ru> wrote:
Out of curiosity, why do you want this?
I have a bunch of parameters (in the Racket sense of the word)
that are "read-only" throughout
On 11/20/2016 12:04 AM, Dmitry Pavlov wrote:
On 11/19/2016 11:45 PM, Alex Knauth wrote:
On Nov 19, 2016, at 1:51 PM, Dmitry Pavlov <dpav...@iaaras.ru> wrote:
Out of curiosity, why do you want this?
I have a bunch of parameters (in the Racket sense of the word)
that are &quo
I guess, under these circumstances, I should
try and make my own continuation marks in the parser/compiler.
I managed to to that. I can not say that it is a beautiful implementation, but
it works.
For "a+b", instead of a syntax object of '(plus a b),
the parser now generates a syntax
Robby,
On 12/06/2016 07:20 PM, Robby Findler wrote:
I'm not sure if it helps, but errortrace fully expands your program
and then traverses that and adds continuation marks (this is called
"annotation" in the errortrace docs). There may be a bug in this
process that causes information to be
Matthew,
On 12/10/2016 06:22 PM, Matthew Flatt wrote:
At Mon, 5 Dec 2016 10:19:03 -0700, Matthew Flatt wrote:
There's a pending issue of making sure that `for` loops or other things
are not needlessly instrumented, since they're only part of the
expansion instead of the original code. We
I just tried that: unfortunately, this stack trace does not seem to
be able to cross the boundary of dynamically required module.
What I see in (continuation-mark-set->context (current-continuation-marks))
are just lines in the "main" Racket module, and no lines that
belong to the non-sexp
Matthew,
Question 1: A factor of 10 is on the high side, but not unusual at the
moment.
There's a pending issue of making sure that `for` loops or other things
are not needlessly instrumented, since they're only part of the
expansion instead of the original code. We haven't gotten back to
Hello,
I have a program that takes 17 seconds and ~260 MB of memory.
If I use errortrace on it, the numbers grow about tenfold: 150 seconds and
2600+ MB.
That is just compilation; in the runtime the program does almost nothing and
terminates quickly.
I know little about how errortrace works
On 12/21/2016 11:33 PM, Jos Koot wrote:
Or up to 60, 60 even nowadays being a commonly used radix in time notation.
FWIW, the radix of the time notation does not seem that simple to me.
I would rather say it is a combined notation.
base-10 (days), base-60 (up to 24 hours+minutes+seconds),
Ben, Georges,
Many thanks for your input.
I checked out the example of a figure from the Scribble manual:
#lang scribble/manual
@(require scriblib/figure)
@figure["straw" @elem{A straw}]{@image["straw.png"]}
Reference to @(figure-ref "straw").
The figure itself successfully converts to
Hello,
I have zero experience with Scribble, and today I have been considering using
it to document a program.
Previously, I have been using LaTeX, Markdown, and Word.
One of the first questions that comes to mind is: can I assign captions to
tables (rendered above the table) and figures
Konrad,
Sorry I am a bit late to the party.
You may remember me from this topic:
https://groups.google.com/forum/#!topic/racket-users/E6utg2Pv5hA
where I looked for a scientific language and a tool for code generation.
Leibniz seems to be very general. Is generation of (C or other) code from
Onno,
That happens when the .zo files produced by plain command-line racket conflict
with ones that come from DrRacket. Or the other way around, I am not sure. Or
something else related to .zo files that are no longer valid for some reason.
Anyway, try removing the 'compiled' directories from
Onno,
I tried deleting all ZO files in the Racket tree, but that broke my Racket
installation.
Sorry, I did not mean to suggest deleting all .zo files in the Racket tree. I
should have been more specific. What I meant was the .zo files for your
programs.
Best regards,
Dmitry
--
You
Vityou,
I will give you an example though I myself sometimes doubt that I did it in the
right way.
Anyway, here is what I did when I had exactly the same problem:
- redefine and reexport #% top-interaction
- provide #:language-info to the DrRacket's REPL (I am not sure if racket's
REPL needs
#lang racket/gui
(require table-panel)
leads to:
standard-module-name-resolver: collection not found
Have you tried raco pkg install table-panel?
Best regards,
Dmitry
--
You received this message because you are subscribed to the Google Groups "Racket
Users" group.
To unsubscribe from
However, I've now ported the Spacemacs light and dark themes for Emacs to
DrRacket color schemes.
https://github.com/tuirgin/drracket-spacemacs-schemes
Very nice and useful. Thank you very much!
Regards,
Dmitry
--
You received this message because you are subscribed to the Google Groups
John Carmack uses Racket as script language in Oculus platform.
Not anymore: https://twitter.com/ID_AA_Carmack/status/739289907038801921
Regards,
Dmitry
--
You received this message because you are subscribed to the Google Groups "Racket
Users" group.
To unsubscribe from this group and
I have added some Racket-related information about the Institute of
Applied Astronomy I work in.
Stephen or Racket-devs: feel free to edit it if needed.
Regards,
Dmitry
On 28.10.2017 12:56, Stephen De Gabrielle wrote:
I created a new wiki page
On 05/27/2018 03:10 PM, Matthew Flatt wrote:
Hi Dmitry,
At Sun, 27 May 2018 14:21:27 +0300, Dmitry Pavlov wrote:
We do not expect Racket users to see a big difference between Racket
v6.12 and Racket v7.0.
I once saw in some text file that extflonums will not make it to Racket on
Chez
Konrad,
I would create a wrapper like this:
(define-fooapi make-foo
(_fun (foo : (_ptr o _foo)
-> (r : _int)
-> (if r (begin (register-finalizer-and-custodian-shutdown foo
destroy-foo) foo)
(error "can not make foo")))
Regards,
Dmitry
On
Deren,
In addition to what Matthew has said, I guess you need to have a 'main' module
in your language, and provide it to raco exe, too. It can be a dummy module or
not. The requirement of such a module is unclear to me, but it exists.
Here is my working script to pack a standalone interpreter
Hello,
I have a performance problem with loading a Racket program dynamically.
I measure the time taken to execute a program in two different ways:
1. raco make ; time racket
2. raco make my-runner.rkt; raco make ; time racket my-runner.rkt
In the first case, execution takes ~1 second, in
Matthew,
I can imagine a problem where the "language implementation" is in the
reader, in which case it wouldn't get run when loading from bytecode,
but that doesn't explain why `racket ` works --- unless the
initialization is also triggered by a `main` or `configure-runtime`
submodule, which
Does the port `p` contain
the source text for , or does it contain the bytecode from
the ".zo" file created by `raco make ?
In this dedicated test, just the source text of and nothing else.
I think this is the main cause of the performance difference, but just
to make sure, does
raco
Matthew,
I'm not clear on why you're using `require-input-port` here instead of
`dyanmic-require` with 's path.
Originally, I needed it to prepend "#lang " to the source because I did
not have it in the file.
That requirement is not so strict now and I will be able to lift it if it is
Matthew,
I agree with John on this one.
In case you decide to release the files, you may want to correct
the comment in callback.rkt: it has (define b #f) and (define b null)
where I believe you mean (define b (box #f)) and (define b (box null)),
respectively. Also, among listed options for
Matthew,
On 03/15/2018 04:22 AM, Matthew Flatt wrote:
At Wed, 14 Mar 2018 21:56:05 +0300, Dmitry Pavlov wrote:
I suspect that "my-callback" or something linked to it are moved
in memory by the garbage collector, and the pointer kept by
the C library is no longer valid. In the fir
Hello,
I am looking for an advice on how to write a macro that is aware of the
information extracted from syntax objects from another macro that is
called "inside" the first one. For instance, let it be the (this) macro
that detects if its argument is an integer or float, and let it be the
s with
#'(begin expanded-code property)
or just use a syntax-property, whatever fits best. When the local-expand
returns, take apart the macro and re-do the same thing.
Details in the implementation.
You may also wish to look at the implementation of Alexis’ Hackett.
On Apr 18
Hello,
I would like to write two seemingly simple macros and I found
no way to do it.
(my-let ((x 2))
(begin
(begin
(begin
(access x)
(access y)
I would like the (access) macro to know at compile (expansion)
time that x is up there in (my-let) macro and y is
n (syntax->datum #'e] ...)
body)]))
(my-let ([x '(a b ((c d) 4) (5 9))])
(access x))
;=>
'((a b ((c d) 4) (5 9)) has-tree-nodes 8)
(the answer is 8 and not 7 because it's counting the 'quote in the syntax)
On Mon, Apr 16, 2018 at 2:16 PM Dmitry Pavlov <dpav...@iaaras.ru
<
You can "pass" information from one macro to another by binding
information to an identifier defined to be a syntax parameter that
both macros have in scope. You would need to functionally update its
value for each rebinding. Its value would be retrievable with
syntax-local-value.
Like
Oh, syntax-parameter-value has helped.
#lang racket
(require (for-syntax syntax/parse syntax/transformer)
racket/stxparam)
(define-syntax-parameter my-info '())
(define-syntax (access stx)
(syntax-parse stx
((_)
(printf "my-info = ~v\n" (syntax-parameter-value #'my-info))
On 03/23/2018 03:58 PM, silverfire...@gmail.com wrote:
Really silly question but I was using the rsvg package with racket/gui on Linux
and everything was working fine. I moved the code over to windows to try it
out (after installing the rsvg package there) and it's complaining that
Hello,
Is it possible to render a plot with the legend outside the plotting
area, like gnuplot does with "set key outside" option?
I see only (plot-legend-anchor) parameter for placement of the legend in
different places inside the plot area.
Best regards,
Dmitry
--
You received this
dcfd7745e2595b8d517fd8cd7c59510efab84a9/plot-lib/plot/private/common/plot-device.rkt#L587
<https://github.com/racket/plot/blob/8dcfd7745e2595b8d517fd8cd7c59510efab84a9/plot-lib/plot/private/common/plot-device.rkt#L587>
Alex.
On Thursday, November 8, 2018 at 11:18:14 PM UTC+8
Bernard University Lyon, France
- Dmitry Pavlov, IAA of Russian Academy of Sciences, Russia
- Michael Weigend, University of Münster, Germany
- Tatiana Mylläri, St.George’s University, Grenada, West Indies
### Registration and abstract submission
Abstract submission is done via EasyChair:
https
Hello,
My workflow broke because of some mess going on with SSL certificates
or something. I do not understand what is going on and how to fix it.
Could please anybody give an idea?
Here is a link:
https://datacenter.iers.org/data/latestVersion/9_FINALS.ALL_IAU2000_V2013_019.txt
It opens in
Neil,
Thank you so much, I did not know that I can play with
the header so easily in get-pure-port.
It turned out that the server expects "Accept:" field
in the request (but does not care much about its value).
So the following code works
#lang racket
(require net/url)
(let* ((url
An additional reason to do it with Racket's HTTP libraries is so that
one bot someday going crazy doesn't make a devops/sysadmin see that it's
Racket, and think unhappy thoughts about Racket. :)
Agreed.
Best regards,
Dmitry
--
You received this message because you are subscribed to the
Hello,
My program demonstrates an unexpected behavior
depending on how I run it.
$
$ racket program.rkt
$ raco make program.rkt
$ racket program.rkt
read: bad syntax `#fx'
in: compiled/subprogram.mylang.zo
context...:
"/path/to/myprogram.rkt": [running body]
temp37_0
It would be good if you can share a link to the code. It is difficult to
guess where is the problem is with this information. Is there an online
public repository with the code?
Unfortunately, no. But you are right. I will try and provide an
excerpt on which the crash reproduces.
Best
Hello,
Racket is a perfect tool for creating new languages and compilers
for them, everybody knows that.
There is one thing, though, generally available in compilers and
not instantly available in Racket DSL tools (or I just missed it).
How to specify options to the compiler?
Consider a
My guess is that no one uses them currently, because it's rare that
you'd want to trade speed for *im*precision. Single-flonums in Racket
are significantly slower than regular flonums, because they're not
treated as a common case. The only use I can think of, and the one that
inspired the
Hello,
While we are at it: is it theoretically possible in Racket or Typed Racket (or
will be possible in Racket 2 or Typed Racket 2) to access struct fields without
repeating the name of the struct type again?
Like in C
typedef struct
{
double x;
double y;
} VeryLongStructureName;
But yes, this is directly related to the discussion above because with the
field name information, you can write your own accessor.
Yes it will be a way to go in Racket 2.
But for now, https://docs.racket-lang.org/struct-define/index.html might be a
good workaround for your problem.
Matthew,
The intended error here is "cannot marshal value that is embedded in
compiled code" at `raco make` time, because fxvectors are not supported
as literals. I'll fix the bytecode writer to check for this case.
OK, thank you. What would you recommend, though, to users who want fxvectors
On 5/9/19 12:04 AM, Dmitry Pavlov wrote:
Matthew,
The intended error here is "cannot marshal value that is embedded in
compiled code" at `raco make` time, because fxvectors are not supported
as literals. I'll fix the bytecode writer to check for this case.
OK, thank you. What
Hello,
I would like to report something that I see as
inconsistent behavior of the bytecode compiler.
The following short program (an artificial minimal
reproducible example) works at first, but fails
after raco make. My OS is Linux.
$ cat one.rkt
#lang racket
(require (for-syntax
Hello,
I posted this question once, nobody answered, this is a second try.
I believe there should be a solution because the problem seems rather common.
See, I have a DSL compiler implemented in Racket as a #lang, syntax-parse etc.
Like most compilers, it can emit somewhat diifferent code from
1 - 100 of 110 matches
Mail list logo
