Are you sure that's what he meant? When I am writing syntax-rules, I often recurse when attempting to recur.
RAC On Aug 9, 2011, at 11:30 AM, Jos Koot <jos.k...@telefonica.net> wrote: > I enjoyed glancing through your links. In the first one I saw the word > 'recurse'. I think you ment 'recur', not 'curse again' :) > Jos > > -----Original Message----- > From: users-boun...@racket-lang.org [mailto:users-boun...@racket-lang.org] > On Behalf Of Neil Van Dyke > Sent: martes, 09 de agosto de 2011 19:02 > To: Prabhakar Ragde > Cc: users@racket-lang.org > Subject: Re: [racket] Macros and literal-id > > Prabhakar Ragde wrote at 08/09/2011 12:05 PM: >> Neil Van Dyke wrote: >> >>> The hardest macro tasks, in "syntax-rules", >>> become opportunities to show off how well one can do scary-looking CPS >>> that's really expensive at expansion time. >> >> For my edification, as well as that of other macro newbies, can you >> give some examples of this, and how syntax-case can be more >> expressive? Thanks. --PR > > Someone other than me can do a better job of explaining, but I'll > quickly and gauchely link to my blog, for some things that were harder > in "syntax-rules" than they would've been in "syntax-case": > > http://www.neilvandyke.org/weblog/2010/10/#2010-10-08 > http://www.neilvandyke.org/weblog/2008/11/#2008-11-03 > http://www.neilvandyke.org/weblog/2009/04/#2009-04-06 > http://www.neilvandyke.org/weblog/2009/11/#2009-11-28 > > Then there are things that are possible in Racket's "syntax-case" but > impossible in RnRS "syntax-rules" (unless perhaps your name is Oleg). > My forthcoming "html-template" package, for example, is implemented > using "syntax-case", so that it can generate large strings of HTML at > expansion time instead of while you're trying to serve Web pages quickly. > > -- > http://www.neilvandyke.org/ > _________________________________________________ > For list-related administrative tasks: > http://lists.racket-lang.org/listinfo/users > > _________________________________________________ > For list-related administrative tasks: > http://lists.racket-lang.org/listinfo/users _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
