On Fri, Mar 19, 2010 at 03:28:39PM +0100, Andy Wingo wrote: > Hi, > > On Fri 19 Mar 2010 09:57, Josef Wolf <j...@raven.inka.de> writes: > > > (show-expansion (defstruct tree height girth age leaf-shape leaf-color)) > > (macroexpand '(defstruct ...)) > > You might want to surround that with (pretty-print ...) from (ice-9 > pretty-print). > > > Of course this is possible. After all, code is data and data is code. > > Sorta. Syntax-rules/syntax-case macros operate on syntax objects, not on > raw s-expressions. This allows them to preserve referential > transparency. So the result of expansion might not look like what you > would expect.
Ummm, I just started to hammer this macro thing into my head, so I don't understand (yet) what you are talking about. I thought the power of lisp macros comes from the fact that they operate on s-expressions? What are syntax objects? What is referential transparency? > Read up on syntax-rules and syntax-case macros, when you get some time. > I used to love defmacros but I don't use them any more. > > http://git.savannah.gnu.org/gitweb/?p=guile.git;a=blob;f=doc/ref/api-macros.texi;h=51f54ed070af453a138282f61e7cd8dbbddc53a3;hb=HEAD Where can I find a version translated in pdf or html or something? Thanks Andy!
