Re: [Chicken-users] New to Scheme Macros

[Alex Shinn]

John Cowan <address@hidden> writes:

> Jim Ursetto scripsit:
>
>> > Explicit renaming macros look neat; the only kinda "bummer" thing is
>> > having to manually pull apart the components of the expression with
>> > car/cdr/etc. instead of the destructuring happening in a more
>> > automatic way. Of course, I imagine one could write a macro to do
>> > this... :)
>> 
>> Yes -- hence the matchable extension ;)
>
> Matchable is kind of heavyweight compared to destructuring-bind,
> although it can of course do the same job.

  (define-syntax bind
    (syntax-rules ()
      ((_ pat var body ...)
       (match-let ((pat var)) body ...))))

This is both more concise and more powerful than
destructuring-bind.

-- 
Alex