> On Mar 31, 2016, at 3:31 PM, cna...@cs.washington.edu wrote:
>
> On Thursday, March 31, 2016 at 1:00:55 AM UTC-7, cna...@cs.washington.edu
> wrote:
>> On Wednesday, March 30, 2016 at 5:37:08 PM UTC-7, Neil Van Dyke wrote:
>
> I found a solution to my problem. I realised that it was better to
I found a solution to my problem. I realised that it was better to
use a function instead of a macro to generate the code. I created a
list and appended the different parts of the code I wanted to generate
in bottom up manner. eval-ing the list can run the code.
If that works for you, good.
On Thursday, March 31, 2016 at 1:00:55 AM UTC-7, cna...@cs.washington.edu wrote:
> On Wednesday, March 30, 2016 at 5:37:08 PM UTC-7, Neil Van Dyke wrote:
> > Does either the below `fun-now` or `make-fun-for-later` do what you want?
> >
> > BEGIN CODE
> > #lang racket/base
> >
> > (defin
On Wednesday, March 30, 2016 at 5:37:08 PM UTC-7, Neil Van Dyke wrote:
> Does either the below `fun-now` or `make-fun-for-later` do what you want?
>
> BEGIN CODE
> #lang racket/base
>
> (define conditional-actions
>(list (cons (lambda () (= 2 (+ 1 1)))
>(lambda () (d
Does either the below `fun-now` or `make-fun-for-later` do what you want?
BEGIN CODE
#lang racket/base
(define conditional-actions
(list (cons (lambda () (= 2 (+ 1 1)))
(lambda () (display "first!\n")))
(cons (lambda () (= 42 (* 2 21)))
(lambda ()
On Wednesday, March 30, 2016 at 2:21:52 PM UTC-7, Neil Van Dyke wrote:
> cna...@cs.washington.edu wrote on 03/30/2016 05:11 PM:
> > I still need to explicitly pass all the arguments to mysyn such as:
> > (mysyn 1 2 3). Is there a way to pass a list l by its name and not its
> > values.
> > For ins
> However, my problem is still not resolved because in all the suggestions
> above, I still need to explicitly pass all the arguments to mysyn such as:
> (mysyn 1 2 3). Is there a way to pass a list l by its name and not its
> values.
> For instance, If l is '(1 2 3)
> I want to be able to cal
cna...@cs.washington.edu wrote on 03/30/2016 05:11 PM:
I still need to explicitly pass all the arguments to mysyn such as:
(mysyn 1 2 3). Is there a way to pass a list l by its name and not its values.
For instance, If l is '(1 2 3)
I want to be able to call the macro as (mysyn l) and not (mysyn
On Wednesday, March 30, 2016 at 1:45:09 PM UTC-7, Robby Findler wrote:
> Perhaps we should improve the syntax-parse documentation? I found the
> overview and examples to be pretty good, tho.
>
> Robby
>
>
> On Wed, Mar 30, 2016 at 3:42 PM, Neil Van Dyke wrote:
> > Oops, I usually end up typing
Robby Findler wrote on 03/30/2016 04:45 PM:
Perhaps we should improve the syntax-parse documentation? I found the
overview and examples to be pretty good, tho.
When the goal is to teach syntax extension, maybe it would make sense to
pick *one* syntax extension form to introduce to people, and
Perhaps we should improve the syntax-parse documentation? I found the
overview and examples to be pretty good, tho.
Robby
On Wed, Mar 30, 2016 at 3:42 PM, Neil Van Dyke wrote:
> Oops, I usually end up typing one of the names wrong. Summary:
>
> * syntax-case -- good one to start with, smooth p
Oops, I usually end up typing one of the names wrong. Summary:
* syntax-case -- good one to start with, smooth path to syntax-parse
* syntax-parse -- best thing ever, but documentation is intimidating, so
maybe start with syntax-case instead
* syntax-rules -- old, limited, no smooth path, yo
A few things:
1. You're mixing elements of `syntax-rules` and `syntax-case` /
`syntax-parse`. The former has an implicit template in its right-hand
side, so you don't need the `#``, whereas you do with `syntax-case` /
`syntax-parse`.
2. If you want this to define a function (as I'm guess
You had the right idea, if you're using `syntax-rules`, but there were a
few small problems:
BEGIN
#lang racket
(define-syntax mysyn
(syntax-rules ()
((_ NAME ELEMENTn ...)
(define (NAME)
(display ELEMENTn) ...
(mysyn fun 1 2 3)
(fun)
END
But, if you
Consider a toy macro defined as:
(define-syntax mysyn
(syntax-rules(fun)
[(mysyn element ...)
(begin
#`(define fun
(display element)...))]))
and a list:
(define l '(1 2 3))
Is there a way to call the macro like so: (mysyn l). When I try this, the
syntax ob
15 matches
Mail list logo
