From: Peter Seibel
Subject: Are there any macro-writing macros in the Common Lisp standard?
Date:
Message-ID: <m3d5xq1xuj.fsf@javamonkey.com>
When I say macro-writing macros I mean macros that are used
specifically to generate the body of macros such as the classic
WITH-GENSYMS and ONCE-ONLY macros. (Obviously macros like DOLIST can
be used in generating macro expansions but that's not what I mean.) I
can't think of any but I may well be spacing on something obvious.
-Peter
--
Peter Seibel ·····@javamonkey.com
Lisp is the red pill. -- John Fraser, comp.lang.lisp
In article <··············@javamonkey.com>,
Peter Seibel <·····@javamonkey.com> wrote:
> When I say macro-writing macros I mean macros that are used
> specifically to generate the body of macros such as the classic
> WITH-GENSYMS and ONCE-ONLY macros. (Obviously macros like DOLIST can
> be used in generating macro expansions but that's not what I mean.) I
> can't think of any but I may well be spacing on something obvious.
I just scanned the "Index of Macros" in CLtL2, and none of them look
like they're particularly oriented towards use within macros.
--
Barry Margolin, ······@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***
From: Peter Seibel
Subject: Re: Are there any macro-writing macros in the Common Lisp standard?
Date:
Message-ID: <m34qj21t58.fsf@javamonkey.com>
Barry Margolin <······@alum.mit.edu> writes:
> In article <··············@javamonkey.com>,
> Peter Seibel <·····@javamonkey.com> wrote:
>
>> When I say macro-writing macros I mean macros that are used
>> specifically to generate the body of macros such as the classic
>> WITH-GENSYMS and ONCE-ONLY macros. (Obviously macros like DOLIST can
>> be used in generating macro expansions but that's not what I mean.) I
>> can't think of any but I may well be spacing on something obvious.
>
> I just scanned the "Index of Macros" in CLtL2, and none of them look
> like they're particularly oriented towards use within macros.
Do you know if there was any discussion of including WITH-GENSYMS or
something like it in the standard? It seems like something that gets
reimplemented everywhere and was well understood at the time of
standardization. I was wondering about the lack of macro-writing
macros because that seems like a line the standardizers might have
drawn to keep the language size down.
-Peter
--
Peter Seibel ·····@javamonkey.com
Lisp is the red pill. -- John Fraser, comp.lang.lisp
From: Carl Shapiro
Subject: Re: Are there any macro-writing macros in the Common Lisp standard?
Date:
Message-ID: <ouyoehaldxs.fsf@panix3.panix.com>
Peter Seibel <·····@javamonkey.com> writes:
> Do you know if there was any discussion of including WITH-GENSYMS or
> something like it in the standard?
There is a comment about this over here
http://groups.google.com/groups?selm=sfw67a7ztys.fsf%40world.std.com&output=gplain
From: Wade Humeniuk
Subject: Re: Are there any macro-writing macros in the Common Lisp standard?
Date:
Message-ID: <Stlsd.40350$VL6.12222@clgrps13>
Peter Seibel wrote:
> When I say macro-writing macros I mean macros that are used
> specifically to generate the body of macros such as the classic
> WITH-GENSYMS and ONCE-ONLY macros. (Obviously macros like DOLIST can
> be used in generating macro expansions but that's not what I mean.) I
> can't think of any but I may well be spacing on something obvious.
>
The most obvious one is the the backquote macro character and
its helpers comma and comma-unsplicing. (But I think that is not the
type you are looking for.) One could write a macro without them but
it would be long and tedious, exactly one of the things macros help
with.
Wade
From: Peter Seibel
Subject: Re: Are there any macro-writing macros in the Common Lisp standard?
Date:
Message-ID: <m3u0r1zmuu.fsf@javamonkey.com>
Wade Humeniuk <····································@telus.net> writes:
> Peter Seibel wrote:
>> When I say macro-writing macros I mean macros that are used
>> specifically to generate the body of macros such as the classic
>> WITH-GENSYMS and ONCE-ONLY macros. (Obviously macros like DOLIST can
>> be used in generating macro expansions but that's not what I mean.) I
>> can't think of any but I may well be spacing on something obvious.
>
> The most obvious one is the the backquote macro character and its
> helpers comma and comma-unsplicing. (But I think that is not the
> type you are looking for.) One could write a macro without them but
> it would be long and tedious, exactly one of the things macros help
> with.
Right, important but not the kind of thing I was looking for.
-Peter
--
Peter Seibel ·····@javamonkey.com
Lisp is the red pill. -- John Fraser, comp.lang.lisp