Hi all,
I’ve been trying to create JSExprs, as defined in the typed/json library. This
is one of those instances where it seems like I must be making things harder
than they should be, but I’m still feeling like a duck on rollerskates in TR,
so I want to make sure I’m not missing an easier way
[Aggregate reply, since you got replies from all over the place...]
On Sun, Jan 18, 2015 at 7:49 PM, Peter Samarin petrsama...@gmail.com wrote:
Hi all,
I was working through chapter 16 of land of lisp and there is (at
that point) a buggy split macro defined like this:
(defmacro split (val
Hello Racketeers
As a gesture of thanks to the Racket community, I'm making freely available
a www.youpatch.com design of the Racket logo.
You'll still need to buy the materials and get it stitched up by a friendly
quilter, but once you're done you can snuggle up in your very own lambda
quilt!
On 2015-01-18 16:14:45 -0800, Jordan Johnson wrote:
Speaking of that: with the splitting of the repos, if I want to contribute
code to the TR repository, is there a quick reference doc yet for running
that repo’s code against an existing Racket installation (or a clone of
the main
Hi all,
I was working through chapter 16 of land of lisp and there is (at that
point) a buggy split macro defined like this:
(defmacro split (val yes no)
`(if ,val
(let ((head (car ,val))
(tail (cdr ,val)))
,yes)
,no))
Here is my version of the
Breaking hygiene with `syntax-case`:
(define-syntax (split stx)
(syntax-case stx ()
([split val yes no]
(let ([head-stx (datum-syntax stx 'head)]
[tail-stx (datum-syntax stx 'tail)])
#`(if (empty? val)
no
(let ([#,head-stx (car val)]
You're better off defining head and tail as syntax parameters and defining your
macro with the more hygienic syntax-parameterize using rename transformers.
The then case:
(let ([h (car val)]
[t (cdr val)])
(syntax-parameterize
([head (make-rename-transformer #'h)]
[tail
IMHO, a Racket way would more likely be to avoid bad hygiene, by one of:
* Just doing it as a procedure that takes closures for the `yes`and `no`
arguments (with the `yes` one taking arguments for `head` and `tail`).
* Doing it as syntax, but having the user of the extension define the .
Hi Sam Matthias,
Thanks for the clarification.
And thanks to Alexander for pointing out the typed/json module — been a while
since I’ve pulled down a nightly build.
Speaking of that: with the splitting of the repos, if I want to contribute code
to the TR repository, is there a quick
On 01/18/2015 02:38 AM, Neil Van Dyke wrote:
Neil Toronto wrote on 01/17/2015 07:57 PM:
Ubuntu has had ASLR enabled by default since 10.04 (about five years).
During that time, in my experience, it's never affected Racket.
I do have to use setarch i686 -R to disable ASLR to run Maxima,
which
On 01/18/2015 06:21 AM, Greg Hendershott wrote:
Up through version 5.3.6 there was a Fedora build of Racket, and as of
a couple years ago I used it on Amazon Linux (which IIUC is ~=
CentOS). I vaguely recall needing to symlink one .so to the name
Racket expected, but otherwise I don't remember
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