I don't suppose you get a stacktrace with the error?
No, it's just the error message. Although it seems to only happen in
drracket. I cant recreate the error from the command line.
On Thu, Oct 7, 2010 at 3:35 PM, Stephen Chang stch...@ccs.neu.edu wrote:
Has anyone seen an error like
I don't think we ever found a workaround, but you could double-check
this thread:
http://lists.racket-lang.org/dev/archive/2010-July/003692.html
Thanks. I played around with enabling/disabling debugging and
profiling options like Doug did and now the error is gone (regardless
of what button
I'm using version 5.0.1.5--2010-09-03 (I'm not using the latest because some
tests are broken in the latest). If I run the stepper tests with no
debugging and no profiling, or with just debugging, all the tests pass. But
if I run the tests with debugging and profiling turned on, some tests fail.
I
I'm surprised no one has linked this all-clarifying blog post :)
http://tartley.com/?p=1267
On Fri, Jan 7, 2011 at 4:52 PM, Eli Barzilay e...@barzilay.org wrote:
Two hours ago, John Clements wrote:
Taking a step back: is there really anything wrong with such
commits?
What Robby and
Oops, sorry, it's 5.0.1.7.
On Tue, Jan 11, 2011 at 1:18 PM, Robby Findler
ro...@eecs.northwestern.edu wrote:
Which version of Racket are you using?
Robby
On Tue, Jan 11, 2011 at 12:12 PM, Stephen Chang stch...@ccs.neu.edu wrote:
Has anyone ever had issues with generating .eps files
, Jan 24, 2011 at 9:26 AM, Noel Welsh noelwe...@gmail.com wrote:
I also get that, but it doesn't stop compilation from working on other
platforms.
N.
On Mon, Jan 24, 2011 at 2:25 PM, Stephen Chang stch...@ccs.neu.edu wrote:
When I try to run ../configure --disable-gracket, I get a warning
That wasnt the bug that I was fixing.
On Wed, Jan 26, 2011 at 5:58 PM, Matthew Flatt mfl...@cs.utah.edu wrote:
At Wed, 26 Jan 2011 17:07:32 -0500, e...@racket-lang.org wrote:
+ (let ([n0 (! n)])
+ (unless (exact-nonnegative-integer? n)
+ (raise-type-error 'take non-negative
Oh sorry, didnt read carefully. I now see that it wasnt my push you
were replying to.
On Wed, Jan 26, 2011 at 6:42 PM, Stephen Chang stch...@ccs.neu.edu wrote:
That wasnt the bug that I was fixing.
On Wed, Jan 26, 2011 at 5:58 PM, Matthew Flatt mfl...@cs.utah.edu wrote:
At Wed, 26 Jan
wrote:
stchang has updated `master' from 1ab22f7c2b to f60957282f.
http://git.racket-lang.org/plt/1ab22f7c2b..f60957282f
=[ 1 Commits ]==
Directory summary:
100.0% collects/tests/lazy/
~~
f609572 Stephen Chang stchang
Racket, I think
to accommodate improper lists.
C:\Users\Administrator\git\exp\pltRacket.exe
Welcome to Racket v5.0.99.7.
(take nonlist 0)
'()
Robby
On Thu, Jan 27, 2011 at 3:32 PM, Stephen Chang stch...@ccs.neu.edu wrote:
What should be the result of (take 0 nonlist)
In the spirit
Is this different from clicking and dragging the wheel button around?
Because that seems to work. It doesnt say left or right though, just
MIDDLE dragging moving.
On Sun, Apr 3, 2011 at 12:39 PM, Matthew Flatt mfl...@cs.utah.edu wrote:
The `racket/gui' library now supports horizontal
Ok, my mouse must not be advanced enough. I'll see if I can find one.
On Sun, Apr 3, 2011 at 3:03 PM, Matthew Flatt mfl...@cs.utah.edu wrote:
At Sun, 3 Apr 2011 13:52:14 -0400, Stephen Chang wrote:
Is this different from clicking and dragging the wheel button around?
Yes, a horizontal mouse
I found a mouse with horizontal tilting, but like others, I dont see
any events when tilting left or right. This is with Windows XP and the
latest from git.
On Sun, Apr 3, 2011 at 5:22 PM, Eli Barzilay e...@barzilay.org wrote:
An hour and a half ago, Eli Barzilay wrote:
Still nothing, but
I dont see the behavior you mentioned in the latest version of
drracket. Can you provide some more information? What version of
drracket and on what platform are you using? Can you provide an
example program that exhibits the behavior?
On Mon, Apr 11, 2011 at 6:08 AM, bhrgunatha
I dont have any insight into the crashing, but fwiw, I ran your
program on two machines and both completed. The first machine has
windows7 and 12gb ram and the second is xp and has 2gb (and pretty
much took all day to complete). I ran both times with unlimited memory
in drracket.
Here is the
* Noel Welsh noelwe...@gmail.com
- Rackunit Tests
- SRFI Tests
- Ensure that all claimed srfi's are in the installer and they all
load into racket or drracket (as appropriate)
* Stephen Chang stch...@ccs.neu.edu
- Lazy Racket Tests
- Lazy stepper tests
* Eli Barzilay e
directory. Stupid of me.
You can also just download the full version from the pre-built binaries, no?
Oh yeah, that would have worked as well, thanks.
* Stephen Chang stch...@ccs.neu.edu
- Lazy Racket Tests
- Lazy stepper tests
all passed
Is there any way to compose contexts in Redex? I want to represent a
context where, at each level, the leftmost term is an arbitrary number
of nested lambdas, and the hole is in the body of the innermost
lambda.
A ::= hole | (\x_1...\x_n.A) e_1 .. e_n
Below is my (stripped down) attempt at
(define-language test
(e x (λ x e) (e e))
(x variable-not-otherwise-mentioned)
(A hole
(in-hole (A e) (λ x A
Cool, that works! I didnt think to do that with in-hole. Can you
explain how it keeps the number of lambdas and arguments the same
though? I'm cant quite figure out what's
Hmm, or maybe you've found a bug in my model. Either way, thanks for
looking into this.
2011/5/2 Casey Klein clkl...@eecs.northwestern.edu:
On Mon, May 2, 2011 at 3:30 PM, Stephen Chang stch...@ccs.neu.edu wrote:
(define-language test
(e x (λ x e) (e e))
(x variable-not-otherwise-mentioned
So I'm struggling with redex again and I cant figure out a way to
utilize any of the previously mentioned tricks. I just included what I
have below and I described what I'm trying to do. Hopefully someone
will have some time to take a look? :)
I have a context A, where the focus is in the body of
Can you define an other stuff non-terminal O:
(O hole )
and sprinkle some Os in A:
(A hole (in-hole (in-hole O ((in-hole O A) e)) (λ x (in-hole O A
Something along this line could work. But I would need side conditions
to make sure that the O doesnt mess up the A-ness property of
?
On Sun, May 15, 2011 at 2:42 PM, Stephen Chang stch...@ccs.neu.edu wrote:
I just pulled the latest from git, started drracket, selected
Beginning Student language,
pressed run, and I got this error msg:
send: no such method: get-test-window for class:
...per\stepper-tool.rkt:235:4
I did run raco setup and I have some tools disabled (in fact,
everything except htdp, stepper, and lazy racket are disabled). But it
still shouldnt error, right?
I guess. One might also say the problem is that you can't disable
certain tools (without disabling others). I'm not sure what the
This question is somewhat vague but I've been able to replicate it
pretty reliably so I'll ask anyways. I'm running redex-check for a
long time and after about 6-8 hours, drracket crashes with a racket
out of virtual memory error. This is on Windows 7. The machine has
lots of physical ram but no
This question is somewhat vague but I've been able to replicate it
pretty reliably so I'll ask anyways. I'm running redex-check for a
long time and after about 6-8 hours, drracket crashes with a racket
out of virtual memory error. This is on Windows 7. The machine has
lots of physical ram but
This question is somewhat vague but I've been able to replicate it
pretty reliably so I'll ask anyways. I'm running redex-check for a
long time and after about 6-8 hours, drracket crashes with a racket
out of virtual memory error. This is on Windows 7. The machine has
lots of physical
Oh, I know: the deinprogramm library probably depends on the
test-engine tool being present too.
Yeah it does. I think deinprogramm also depends on the Signatures tool.
_
For list-related administrative tasks:
I'm trying to compile racket from source on a linux machine here at
Northeastern, but when I try to run the configure script, I get a
command not found error. The permissions on the file are correct and
when I run bash configure I get this:
stchang@mrdo:~/plt/src$ bash configure
: command
Does anyone know why drdr is hanging on this commit? Is it because it
changed the docs?
On Wed, Jul 13, 2011 at 4:27 PM, as...@racket-lang.org wrote:
asumu has updated `master' from cf04739f93 to 2fdc56db3a.
http://git.racket-lang.org/plt/cf04739f93..2fdc56db3a
=[ 1 Commits
* Stephen Chang stch...@ccs.neu.edu
- Lazy Racket Tests
- Lazy stepper tests
All passed.
* Eli Barzilay e...@barzilay.org
- Swindle Tests
- Plot Tests
- Verify that the unix installer works in both modes
- Racket Tree: compare new distribution tree to previous one
Version
- Stepper Tests
Printing in the Stepper is broken yet again. (I get backquote printing
for the DMdA levels for lists.) I'll try to fix it Monday or Tuesday.
Mike, is the DMdA stepper the same as the HtDP stepper? I'm only
seeing 1 dmda test in collects/tests/stepper but it doesnt have any
I'm getting some compile errors. Is it due to this checkin?
raco setup: post-installing: mzcom
raco setup: post-installing: mzscheme
raco setup: post-installing: racket/gui
raco setup:
raco setup: error: during making for redex/tests/compiler
raco setup: compile: identifier used out of context
I'm not sure when this was fixed but the search in drracket is much
nicer to use now because the focus switches immediately to the search
box. Thanks.
_
For list-related administrative tasks:
http://lists.racket-lang.org/listinfo/dev
Occasionally, my prefs file gets into a state where drracket cant
start and fails with this error:
-: expects type number as 2nd argument, given: #f; other arguments were: 76
=== context ===
C:\plt\collects\framework\private\frame.rkt:255:2
drracket a second time, that monitor wasn't
there anymore and a bug caused it to crash instead of just moving your
window to an existing monitor.
I've pushed a repair for the crash, but does that sound like a
plausible scenario?
Robby
On Wed, Sep 28, 2011 at 8:51 PM, Stephen Chang stch
Did Stephen find it because of the ACM somehow?
I guess so. It was cited in an acm paper (haskell workshop). I think I
found it originally by looking at citations on google scholar, but
they probably pulled their information from acm-related papers.
On Fri, Sep 30, 2011 at 1:22 PM,
* Stephen Chang stch...@ccs.neu.edu
- Lazy Racket Tests
- Lazy stepper tests
All passed.
On Mon, Oct 17, 2011 at 9:02 PM, Ryan Culpepper r...@cs.utah.edu wrote:
Checklist items for the v5.2 release
(using the v5.1.900.1 release candidate build)
Search for your name to find relevant
Say I have the following program:
#lang racket
(define-for-syntax (loc-expand stx) (local-expand stx 'expression '()))
(define-syntax (my-begin stx)
(syntax-case stx ()
[(_ e ...)
(with-syntax ([(x ...) (map loc-expand (syntax-list #'(e ...)))])
#'(begin x ...))]))
* Stephen Chang stch...@ccs.neu.edu - Lazy Racket Tests - Lazy stepper
tests
All passed.
On Tue, Jan 17, 2012 at 6:44 PM, Ryan Culpepper r...@cs.utah.edu wrote:
Checklist items for the v5.2.1 release
(using the v5.2.0.900 release candidate build)
Search for your name to find relevant
could contain this feature. (The second one seems important, but not
as much as the first.)
Robby
On Fri, Feb 3, 2012 at 1:06 AM, Stephen Chang stch...@ccs.neu.edu wrote:
When using Dr Racket, I use the right-click Jump to definition of a
lot but I frequently find that I also want an easy way
On Fri, Feb 3, 2012 at 1:55 PM, Asumu Takikawa as...@ccs.neu.edu wrote:
On 2012-02-03 12:06:16 -0500, Stephen Chang wrote:
Any ideas on what the graphical representation should look like?
Should it be a popup window? Or a side bar?
I like the idea of a breadcrumb UI (maybe at the bottom like
Since jumping to a definition will sometime open a new window.
Is this true in drracket? It doesnt seem like it is. I have a new
implementation where bookmarks are a text mixin, so each tab will have
it's own stack. But there is no jumping between windows.
On Sat, Feb 4, 2012 at 5:00 PM,
the
bookmarks be stored then?
Robby
On Saturday, February 4, 2012, Stephen Chang stch...@ccs.neu.edu wrote:
Since jumping to a definition will sometime open a new window.
Is this true in drracket? It doesnt seem like it is. I have a new
implementation where bookmarks are a text mixin, so each tab
I want to write a redex metafunction contract that goes between two
languages. Is there currently a way to do this?
For example,
#lang racket
(require redex)
(define-language L1
(e 1))
(define-language L2
(f 2))
(define-metafunction L1
L1-L2 : e - f
[(L1-L2 1) 2])
(term (L1-L2 1))
. .
)
(define-language L1
(e 1))
(define-language L2
(f 2))
(define-union-language L (l1: L1) (l2: L2))
(define-metafunction L
L1-L2 : l1:e - l2:f
[(L1-L2 1) 2])
Hope that works for your use case.
Robby
On Sun, Feb 5, 2012 at 4:11 PM, Stephen Chang stch...@ccs.neu.edu wrote:
I want
Would anyone find it useful to have a triangle primitive in
slideshow/pict? How easy would it be to add one?
_
Racket Developers list:
http://lists.racket-lang.org/dev
I have a drracket plugin that reads the contents of the definitions
window as syntax and then traverses that syntax object so that for
each subexpression e it prints
1) (syntax-datum e), and
2) the contents of the definitions window at starting at position
(syntax-position e) and ending at
Do you mean turn off? I didn't but I will try it. Would it affect some
programs but not others though?
On Jun 11, 2012 8:01 PM, Robby Findler ro...@eecs.northwestern.edu
wrote:
Did you turn out port-count-lines! on the port?
Robby
On Mon, Jun 11, 2012 at 6:57 PM, Stephen Chang stch
...@cs.utah.edu wrote:
No, Robby meant on. Line counting matters even more for programs with
non-ASCII characters.
On Jun 12, 2012, at 8:07 AM, Stephen Chang stch...@ccs.neu.edu wrote:
Do you mean turn off? I didn't but I will try it. Would it affect some
programs but not others though
* Stephen Chang stch...@ccs.neu.edu
- Lazy Racket Tests
Pass
- Lazy stepper tests
Fail, but I assume commit 25068 fixes the problems (in the process of
confirming now.)
* Eli Barzilay e...@barzilay.org
- Swindle Tests
- XREPL Tests
- Racket Tree: compare new distribution tree
On Wed, Jul 25, 2012 at 2:59 PM, Stephen Chang stch...@ccs.neu.edu wrote:
* Stephen Chang stch...@ccs.neu.edu
- Lazy Racket Tests
Pass
- Lazy stepper tests
Fail, but I assume commit 25068 fixes the problems (in the process of
confirming now.)
With 25068, all the stepper tests pass
this.
* Stephen Chang stch...@ccs.neu.edu
- Lazy stepper tests
Passing.
* Eli Barzilay e...@barzilay.org
- XREPL Tests
- Racket Tree: compare new distribution tree to previous one
- Run the unix installer tests
Version Updates: if a major change has happened, update the version
number
I want to use judgment-holds in a side-condition but sometimes it
doesn't quite work because it's a macro. In the following example,
judgment-holds does not use the value bound to tau. Is there a nice
way to make it do what I want?
#lang racket
(require redex)
(define-language L
(e integer
Oh yeah, this first solution should work (I want to keep it as an
output though). Thanks.
On Wed, Aug 22, 2012 at 9:01 AM, Robby Findler
ro...@eecs.northwestern.edu wrote:
You could do the below, but can you say a little bit more about what
the metafunction and judgment-form you want to
of awkward, tho. Do you plan to typeset this portion of your
model?
Robby
On Wed, Aug 22, 2012 at 10:07 AM, Stephen Chang stch...@ccs.neu.edu wrote:
Oh yeah, this first solution should work (I want to keep it as an
output though). Thanks.
On Wed, Aug 22, 2012 at 9:01 AM, Robby Findler
ro
I've been playing with Racket streams and I am confused about what
exactly counts as a stream? For example, are lists streams? I think
the answer is yes but then are the stream- functions supposed to work
on regular lists? Some do but some don't.
Welcome to DrRacket, version 5.3.0.16 [3m].
* Stephen Chang stch...@ccs.neu.edu
- Lazy Racket Tests
- Lazy stepper tests
pass
* Eli Barzilay e...@barzilay.org
- Swindle Tests
- XREPL Tests
- Racket Tree: compare new distribution tree to previous one
- Run the unix installer tests
- Run zsh completions tests
On Wed, Nov 21, 2012 at 2:22 PM, Asumu Takikawa as...@ccs.neu.edu wrote:
On 2012-11-21 12:50:49 -0600, Robby Findler wrote:
On Wed, Nov 21, 2012 at 11:52 AM, Asumu Takikawa as...@ccs.neu.edu wrote:
Should queues also be streams or just sequences?
I didn't think about this: if you think they
I have tried automatic parens and stopped using it for the exact
reasons you mentioned. I would start using it again if your proposal
is implemented.
On Thu, Nov 22, 2012 at 7:20 PM, Nadeem Abdul Hamid nad...@acm.org wrote:
Hello all,
I've been discussing with Robby a possible improvement of
When doing quick experiments, I've often wanted the ability to define
a new language and then use it in the same file. I thought submodules
might allow me to do this, but I've realized that I still can't.
However, in trying to do so I ran into some interesting behavior:
Here is a file named
(printf Hello, ~a!\n 'one)
(printf Salutations, ~a!\n 'two))])))
(module main (submod .. greeting)
Santa Claus
Easter Bunny)
Carl Eastlund
On Mon, Dec 3, 2012 at 3:46 PM, Stephen Chang stch...@ccs.neu.edu wrote:
When doing quick experiments, I've often wanted
Second, the date structure used by racket/date has some seemingly
extraneous fields. For example, `week-day` and `year-day` can be
calculated from the rest of the fields and aren't necessary (this is
annoying if you want to construct your own dates manually).
I've been confused by this in the
For now, you can enter into google:
site:docs.racket-lang.org java
On Jan 12, 2013 2:07 PM, Harry Spier vasishtha.sp...@gmail.com wrote:
I just did a search in manuals on Java. I wanted to see all the
references to Java in the Racket documentation and it only brought up
a reference to JavaDoc
* Stephen Chang stch...@ccs.neu.edu
- Lazy Racket Tests
- Lazy stepper tests
pass
* Eli Barzilay e...@barzilay.org
- Swindle Tests
- XREPL Tests
- Racket Tree: compare new distribution tree to previous one
- Run the unix installer tests
- Run zsh completions tests
Trying to use prop:match-expander but it doesn't seem to be available:
http://pre.racket-lang.org/docs/html/reference/match.html?q=prop%3Amatch-expander#%28def._%28%28lib._racket%2Fmatch..rkt%29._prop~3amatch-expander%29%29
Welcome to DrRacket, version 5.3.1.3 [3m].
Language: racket [custom].
Thanks for the clarification.
On Jan 26, 2013 6:55 AM, Matthew Flatt mfl...@cs.utah.edu wrote:
At Sat, 26 Jan 2013 01:12:04 -0500, Stephen Chang wrote:
Is this a supported use of submodules?
#lang racket
(define-syntax (def-wrapped stx)
(syntax-case stx ()
[(_ (f arg
-module-path:'tmp-module-name
On Sat, Jan 26, 2013 at 6:55 AM, Matthew Flatt mfl...@cs.utah.edu wrote:
At Sat, 26 Jan 2013 01:12:04 -0500, Stephen Chang wrote:
Is this a supported use of submodules?
#lang racket
(define-syntax (def-wrapped stx)
(syntax-case stx ()
[(_ (f arg ...) body
Is there a test case that checks this correction?
Of course there is :)
_
Racket Developers list:
http://lists.racket-lang.org/dev
I know the code below is wrong because it sends TR into an infinite
loop. What is the recommended way to represent mynull (and its type)
without leaking its representation to a user of this library?
#lang typed/racket
(define mynull null)
(define-type MyListof (All (A) (Rec X (U mynull (Pair A
On Thu, Apr 11, 2013 at 6:47 PM, Eric Dobson eric.n.dob...@gmail.com wrote:
You shouldn't be able to send the TR into an inifinite loop.
Typechecking is supposed to terminate. Please try to reduce it to the
minimum testcase and file a bug.
I just filed pr 13687.
On Thu, Apr 11, 2013 at
* Stephen Chang stch...@ccs.neu.edu
- Lazy Racket Tests
- Lazy stepper tests
pass
On Wed, Apr 17, 2013 at 10:36 PM, Ryan Culpepper ry...@ccs.neu.edu wrote:
Checklist items for the v5.3.4 release
(using the v5.3.3.900 release candidate build)
Search for your name to find relevant
The form meta-variable (as used in the documentation for module or
begin) doesn't seem to be mentioned anywhere. Maybe this would be a
good place for it? Or should it go in the Notation Guide?
On Sun, Apr 28, 2013 at 6:04 PM, Matthew Flatt mfl...@cs.utah.edu wrote:
At Thu, 25 Apr 2013 14:59:42
When compiling a fresh git head clone, I still get some cross-phase
persistence errors (see below). Is this my fault, or are some packages
still missing the declaration?
raco setup: --- checking package dependencies ---
raco setup:
raco setup: error: during making for
* Stephen Chang stch...@ccs.neu.edu
- Lazy Racket Tests
- Lazy stepper tests
all pass
* Eli Barzilay e...@barzilay.org
- Swindle Tests
- XREPL Tests
- Verify PL language
- Racket Tree: compare new distribution tree to previous one
- Run the unix installer tests
- Run
Here is a syntax-parse macro that requires one subexpression to be
wrapped with an exclamation point.
(define-syntax (test stx)
(syntax-parse stx #:datum-literals (!)
[((~or (~once (! x:expr) #:name !)
(~not (! y:expr))) ...)
#'42]))
Everything works like I would
PM, Stephen Chang wrote:
Here is a syntax-parse macro that requires one subexpression to be
wrapped with an exclamation point.
(define-syntax (test stx)
(syntax-parse stx #:datum-literals (!)
[((~or (~once (! x:expr) #:name !)
(~not (! y:expr))) ...)
#'42
Just played a bit with gen:set. It looks great and in particular the
fallback implementations are very convenient.
One comment: the distinction between primitive methods and derived
methods confused me somewhat. Can you explain the reasoning for
determining which is which?
For example, when I
with the primitive
methods?
Very few of the derived come free because most rely on set-stream,
but set-stream is not primitive which is why I thought there might
be a distinction between iterable sets and non-iterable.
Carl Eastlund
On Thu, Aug 1, 2013 at 6:27 PM, Stephen Chang stch
, Aug 1, 2013 at 6:51 PM, Stephen Chang stch...@ccs.neu.edu wrote:
For the other part, I either should have made it as you say -- implement
the primitive ones and you get the others -- or else I should have
clearly
documented the relationship somewhere.
You did document the dependencies
With that in mind, I think it would make sense to move `set-first' and
`set-empty?' to the primitive set (making it clear that they are
optional, and can be derived from `set-stream' if need be). With those
two in the primitive set, anything that implements all the primitives
should get all
,
that is good enough.
I guess my question is, is this a docs issue, or should the code have
more calls to set-implements?
On Fri, Aug 2, 2013 at 1:47 PM, Stephen Chang stch...@ccs.neu.edu wrote:
With that in mind, I think it would make sense to move `set-first' and
`set-empty?' to the primitive set
Some quick observations.
on Chromium Version 23.0.1271.97 Ubuntu 12.04 (23.0.1271.97-0ubuntu0.12.04.1):
- broken links: download, research
- only 2 examples? :) how come some got cut?
- web scraper example is cut off when clicking ? Maybe make the
overlay window variable width?
on mobile
Is there a way for a syntax-class to automatically inherit attributes?
For example, the third class below combines the first two. Is there a
way to automatically get the attributes from the first two classes in
the third one (ie, I want to drop the #:attr X #'a.X part in the
third class)?
#lang
, and it all works like you want.
Carl Eastlund
On Fri, Aug 23, 2013 at 12:22 AM, Stephen Chang stch...@ccs.neu.edu wrote:
Is there a way for a syntax-class to automatically inherit attributes?
For example, the third class below combines the first two. Is there a
way to automatically get
Hi dev,
I've noticed that Racket has a lot of convenient binding forms but
they don't fit together unless someone does it manually (for example
there's match-let and match-let-values, but no match-for).
As an educational side project, I've been toying around with a
different way of organizing
? Specifically how do
overlapping uses fare in the two systems? Microbenchmarks okay for now. --
Matthias
On Aug 26, 2013, at 12:54 AM, Stephen Chang wrote:
Hi dev,
I've noticed that Racket has a lot of convenient binding forms but
they don't fit together unless someone does it manually
)))
(displayln (~a The middle three elements are: (v 1 4
This expands into uses of vector-ref and vector-set! so there is no
runtime penalty
for using this shorthand.
/Jens Axel
2013/8/26 Stephen Chang stch...@ccs.neu.edu
Hi dev,
I've noticed that Racket has a lot of convenient
Hi dev,
I would like to provide (for-syntax) the expand-clause function in
racket/private/for.rkt. Would this cause any problems? Would anyone
object to this?
I have an implementation of for/X in my generic-bind library that uses
expand-clause and with it, the generic-bind ~for forms are as
Among the bodys, besides stopping the iteration and preventing later body
evaluations, a #:break guard-expr or #:final guard-expr clause starts a new
internal-definition context.
I had the same thought process as Carl. I now understand the behavior
but I don't understand why it's needed? It
be a better name.
Ok I will add it. Thanks.
At Fri, 6 Sep 2013 00:45:40 -0400, Stephen Chang wrote:
Hi dev,
I would like to provide (for-syntax) the expand-clause function in
racket/private/for.rkt. Would this cause any problems? Would anyone
object to this?
I have an implementation
the break
expression becomes too large to fit on one line. So is the reason why
#:when and #:unless can't be used the same way because there already
exist when and unless forms?
Carl Eastlund
On Fri, Sep 6, 2013 at 2:31 PM, Stephen Chang stch...@ccs.neu.edu
wrote:
Among the bodys
think the current architecture would support this change easily
since it's accumulator-based. If a #:when/unless condition is true,
you just call the loop with the old accumulators. I can put it in if
there is agreement.
Carl Eastlund
On Fri, Sep 6, 2013 at 2:31 PM, Stephen Chang stch
I like the proposal. My earlier suggestion for supporting #:when and
#:unless in the body is the same as what you are asking for, I
believe.
On Wed, Sep 11, 2013 at 12:41 AM, Roman Klochkov kalimeh...@mail.ru wrote:
I propose to add yet one keyword to for/foldX/derived/break (and so to all
namespace-attach-module: a different module with the same name is already in
the destination namespace
I am running into this issue with make-base-eval again. Looking
through the email archive, it looks like it's come up several times
before but I couldn't figure out if there was a resolution.
Can I push the attached (1-line) patch? I don't have a good grasp of
namespaces so I would like someone to review it first.
Right now, make-base-eval tries to attach racket/pretty to the
namespace regardless of whether it's already there, which sometimes
results in an exception (for example if
Whether that identifier exists in the namespace has nothing to do with
whether racket/pretty can be attached.
Can you explain this a little more because it's a little unintuitive to me?
One option would be for install-pretty-printer! to just catch and discard
the error. Evaluators for some
,
;; and #t is not a good print handler
Ryan
On 10/02/2013 03:58 PM, Stephen Chang wrote:
A namespace is a mapping from top-level identifiers to whatever they are,
as
well as a separate mapping from module names to modules (roughly). What
you
care about here is the second mapping
Ok here's another dumb question. Why is that namespace-attach-module
even needed? It seems the dynamic require on the next line does the
desired thing?
On Wed, Oct 2, 2013 at 4:16 PM, Stephen Chang stch...@ccs.neu.edu wrote:
Ok thanks for the explanations. I'll try doing one of the last two
) and then doing the
dynamic-require with and without the attach.
Robby
On Wed, Oct 2, 2013 at 4:58 PM, Stephen Chang stch...@ccs.neu.edu wrote:
Ok here's another dumb question. Why is that namespace-attach-module
even needed? It seems the dynamic require on the next line does the
desired thing
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