Re: Macros: Scheme vs Common Lisp
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>>>> "Craig" == Craig Lanning
<CraigL(a)internetx.net> writes:
Craig> At 07:13 AM 8/27/98 -0400, Rick Campbell wrote:
> Run Plugin:"c:\users\craig\mail\attach\Re Macros Scheme vs
Common Li1.ems <0880.0002>"
> Content-Type: text/plain; charset=US-ASCII
>
> From: sperber(a)informatik.uni-tuebingen.de (Michael Sperber [Mr. Preprocessor])
> Date: 26 Aug 1998 14:20:32 +0200
>
> . . .
>
> I suspect your CL actually processes the forms in some weird
> order. In any case, I strongly doubt that the CL standard
> mandates the behavior you describe.
>
> Common Lisp does not mandate much of anything regarding when expansion
> occurs. It's an implementation detail, i. e. you should not write
> code that depends on expansion happening at a certain time.
>
> Rick
Craig> That's not really true. All forms are processed in order from left to
Craig> right. Macros are expanded as they are reached. In compiled code,
Craig> macros are expanded at compile time in such a way as not be expanded
Craig> at runtime.
This still doesn't tie down the behavior in the example Rick's
referring to.
--
Cheers =8-} Chipsy
Friede, Völkerverständigung und überhaupt blabla
Rick Campbell
Friday, 28 August
Fri, 28 Aug
2:41 p.m.
New subject: Macros: Scheme vs Common Lisp
From: sperber(a)informatik.uni-tuebingen.de (Michael Sperber [Mr. Preprocessor])
Date: 28 Aug 1998 09:17:40 +0200
>>>> "Craig" == Craig Lanning
<CraigL(a)internetx.net> writes:
Craig> At 07:13 AM 8/27/98 -0400, Rick Campbell wrote:
> Run Plugin:"c:\users\craig\mail\attach\Re Macros Scheme vs
Common Li1.ems <0880.0002>"
> Content-Type: text/plain; charset=US-ASCII
>
> From: sperber(a)informatik.uni-tuebingen.de (Michael Sperber [Mr. Preprocessor])
> Date: 26 Aug 1998 14:20:32 +0200
>
> . . .
>
> I suspect your CL actually processes the forms in some weird
> order. In any case, I strongly doubt that the CL standard
> mandates the behavior you describe.
>
> Common Lisp does not mandate much of anything regarding when expansion
> occurs. It's an implementation detail, i. e. you should not write
> code that depends on expansion happening at a certain time.
>
> Rick
Craig> That's not really true. All forms are processed in order from left to
Craig> right. Macros are expanded as they are reached. In compiled code,
Craig> macros are expanded at compile time in such a way as not be expanded
Craig> at runtime.
This still doesn't tie down the behavior in the example Rick's
referring to.
--
Cheers =8-} Chipsy
Friede, Völkerverständigung und überhaupt blabla
Please be careful with your quoting. The two paragraphs preceding my name above
look like they're both from me. The second is, the first is that to
which I was responding.
Rick
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