Re: [Scheme-reports] [wg2] in support of single-arity procedural syntax transformers

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Re: [Scheme-reports] [wg2] in support of single-arity procedural syntax transformers Alaric Snell-Pym (12 May 2011 09:29 UTC)

Re: [Scheme-reports] [wg2] in support of single-arity procedural syntax transformers Andy Wingo (12 May 2011 10:40 UTC)

Re: [Scheme-reports] [wg2] in support of single-arity procedural syntax transformers Alaric Snell-Pym (12 May 2011 11:37 UTC)

Re: [Scheme-reports] [wg2] in support of single-arity procedural syntax transformers Jim Rees (12 May 2011 12:37 UTC)

Re: [Scheme-reports] [wg2] in support of single-arity procedural syntax transformers Andy Wingo (12 May 2011 14:32 UTC)

Re: [Scheme-reports] [wg2] in support of single-arity procedural syntax transformers Alaric Snell-Pym (12 May 2011 15:11 UTC)

Re: [Scheme-reports] [wg2] in support of single-arity procedural syntax transformers Aaron W. Hsu (12 May 2011 22:04 UTC)

Re: [Scheme-reports] [wg2] in support of single-arity procedural syntax transformers Andy Wingo (12 May 2011 14:31 UTC)

Re: [Scheme-reports] [wg2] in support of single-arity procedural syntax transformers Eli Barzilay (12 May 2011 17:51 UTC)

Re: [Scheme-reports] [wg2] in support of single-arity procedural syntax transformers Per Bothner (12 May 2011 16:03 UTC)

Re: [Scheme-reports] [wg2] in support of single-arity procedural syntax transformers Alaric Snell-Pym (12 May 2011 17:04 UTC)

Re: [Scheme-reports] [wg2] in support of single-arity procedural syntax transformers Sztefan Edwards (12 May 2011 17:19 UTC)

Re: [Scheme-reports] [wg2] in support of single-arity procedural syntax transformers Per Bothner (12 May 2011 17:27 UTC)

Re: [Scheme-reports] [wg2] in support of single-arity procedural syntax transformers Alaric Snell-Pym (13 May 2011 08:23 UTC)

Re: [Scheme-reports] [wg2] in support of single-arity procedural syntax transformers Aaron W. Hsu (12 May 2011 22:05 UTC)

Re: [Scheme-reports] [wg2] in support of single-arity procedural syntax transformers Alaric Snell-Pym 12 May 2011 15:09 UTC

On 05/12/11 15:32, Andy Wingo wrote:
> On Thu 12 May 2011 14:36, Jim Rees <jimreesma@gmail.com> writes:
>
>> On Thu, May 12, 2011 at 7:36 AM, Alaric Snell-Pym <alaric@snell-pym.org.uk> wrote:
>>
>>     But what happens if you try to REVERSE a syntax-object wrapping a list?
>>     You can't -
>>
>> Overall your essay is illuminating, but reversing a syntax-object
>> representing a list is easy in an R6RS-conforming implementation.
>>
>> (define (reverse-wrapped-list obj)
>>   (syntax-case obj ()
>>     ((e ...) (reverse #'(e ...)))))
>
> This works on psyntax systems, where lists are never wrapped, but AFAIK
> it does not work on Racket, where lists are wrapped.

Yeah, I based my point on a statement by Eli that, IIRC, stated that
even the lists get magic wrapped cons cells some of the time.

> Andy

ABS

--
Alaric Snell-Pym
http://www.snell-pym.org.uk/alaric/

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