Re: [Scheme-reports] when and unless

Re: [Scheme-reports] when and unless John Cowan (19 May 2011 21:42 UTC)

Re: [Scheme-reports] when and unless Pierpaolo Bernardi (20 May 2011 09:32 UTC)

Re: [Scheme-reports] when and unless Alex Queiroz (20 May 2011 09:38 UTC)

Re: [Scheme-reports] when and unless Alaric Snell-Pym (23 May 2011 10:36 UTC)

Re: [Scheme-reports] when and unless Eli Barzilay (23 May 2011 10:41 UTC)

Re: [Scheme-reports] when and unless Aaron W. Hsu (23 May 2011 22:50 UTC)

Re: [Scheme-reports] when and unless Pierpaolo Bernardi (24 May 2011 08:25 UTC)

Re: [Scheme-reports] when and unless Emmanuel Medernach (24 May 2011 08:37 UTC)

Re: [Scheme-reports] when and unless Alaric Snell-Pym (24 May 2011 09:06 UTC)

Re: [Scheme-reports] when and unless Aaron W. Hsu (24 May 2011 18:57 UTC)

Re: when and unless Arthur A. Gleckler (24 May 2011 19:35 UTC)

Re: [Scheme-reports] when and unless leppie (24 May 2011 08:51 UTC)

Re: [Scheme-reports] when and unless Pierpaolo Bernardi (24 May 2011 09:06 UTC)

Re: [Scheme-reports] when and unless leppie (24 May 2011 09:23 UTC)

Re: [Scheme-reports] when and unless John Cowan (24 May 2011 14:51 UTC)

Re: [Scheme-reports] when and unless Pierpaolo Bernardi (24 May 2011 14:57 UTC)

Re: [Scheme-reports] when and unless Aaron W. Hsu (24 May 2011 18:56 UTC)

Re: [Scheme-reports] when and unless Pierpaolo Bernardi 24 May 2011 09:00 UTC

On Tue, May 24, 2011 at 10:48, leppie <xacc.ide@gmail.com> wrote:
> On Tue, May 24, 2011 at 10:25 AM, Pierpaolo Bernardi
> <olopierpa@gmail.com> wrote:
>
>> I use them, sometimes, when rewriting in scheme an algorithm
>> written in imperative style in a foreign language.  For example,
>> when taking an algorithm from a book.
>>
>> Sometimes it's worth the time to translate the code in good style,
>> and sometimes the time is missing.  Luckily, with scheme we have
>> the choice.
>>
>> Nevertheless, I'd prefer not to have these macros in the standard.
>> And I'd strongly prefer not to have them in WG1 scheme.
>
> There are good reasons to use UNLESS and WHEN, especially in terms of
> error checking.

The text written by me that you quote refers to WHILE and UNTIL macros,
not to WHEN and UNLESS, about which I agree with you, and it seems also
with everyone else which has expressed an opinion.

Cheers
P.

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