Re: [Chicken-users] Defining defmacro using define-syntax

[Peter Bex]

On Mon, May 13, 2019 at 07:11:40PM +0100, Martin Ward wrote:
> Chicken scheme does not appear to have defmacro or define-macro
> but does have define-syntax.
> 
> Is there a way to define defmacro using define-syntax?

This is of course highly discouraged (because defmacro is
inherently unhygienic), but you can do:

(import (chicken syntax))

(define-syntax defmacro
  (syntax-rules ()
    ((_ ?name ?args ?body ...) 
     (define-syntax ?name
       (er-macro-transformer
         (lambda (e r c)
           (apply (lambda ?args ?body ...) (cdr e))))))))

Cheers,
Peter

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