Very cool, thanks for the ideas.<div> </div><div>Daniel <div class="gmail_quote">On Fri, Sep 16, 2011 at 1:20 PM, Matthias Felleisen <<a href="mailto:matthias@ccs.neu.edu">matthias@ccs.neu.edu</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> Yes, I was thinking of naming the register explicitly too. <div><div></div><div class="h5"> On Sep 16, 2011, at 4:17 PM, Daniel MacDougall wrote: > I suppose that would work. Sam suggested on #racket that I include the name of the argument in the macro definition: > > (define-syntax-rule (foo bar form ...) > ((lambda (bar) form ...) "ARG")) > > Then you could say: > > (foo bar > ; Do stuff with bar here... > ) > > On Fri, Sep 16, 2011 at 1:12 PM, Matthias Felleisen <<a href="mailto:matthias@ccs.neu.edu">matthias@ccs.neu.edu</a>> wrote: > > > Why not just store the arguments to lambda in some 'register' and ask for them? > > > > > On Sep 16, 2011, at 4:09 PM, Daniel MacDougall wrote: > > > In this example it should return "ARG". > > > > On Fri, Sep 16, 2011 at 1:08 PM, Matthias Felleisen <<a href="mailto:matthias@ccs.neu.edu">matthias@ccs.neu.edu</a>> wrote: > > > > > > What should (foo bar) return? > > > > > > On Sep 16, 2011, at 3:46 PM, Daniel MacDougall wrote: > > > > > Is there any way to define a macro that expands out to a lambda, and then access the arguments passed to that lambda from outside the macro in the calling context? > > > Here's an example of what I mean: > > > > > > #lang racket > > > > > > (define-syntax-rule (foo form ...) > > > ((lambda (bar) form ...) "ARG")) > > > > > > (foo "Hello") ; => returns "Hello" > > > > > > (foo bar) ; => expand: unbound identifier in module in: bar > > > > > > > > > I'd like access to the "bar" argument on the last line. Is this possible with Racket macros? > > > > > > Thanks, > > > Daniel > > > _________________________________________________ > > > For list-related administrative tasks: > > > <a href="http://lists.racket-lang.org/listinfo/users" target="_blank">http://lists.racket-lang.org/listinfo/users</a> > > > > > > </div></div></blockquote></div> </div>