mirror of
https://github.com/justinethier/cyclone.git
synced 2025-05-23 20:15:05 +02:00
44 lines
1.4 KiB
Scheme
44 lines
1.4 KiB
Scheme
;(import (scheme eval) (scheme write))
|
|
;
|
|
;(eval '((lambda (expr rename compare) (cond ((null? (cdr expr)) #t) ((null? (cddr expr)) (cadr expr)) (else (list (rename (quote if)) (cadr expr) (cons (rename (quote and)) (cddr expr)) #f)))) '(test 1 2 3) (lambda (x) x) '()))
|
|
;;;(eval '((lambda (x) x) 1))
|
|
;
|
|
;
|
|
(import (scheme base)
|
|
(scheme write))
|
|
|
|
;(define-syntax test
|
|
; (er-macro-transformer
|
|
; (lambda (expr rename compare)
|
|
; `((lambda ()
|
|
; (write "testing")
|
|
; (write (quote ,(cdr expr))))))))
|
|
;
|
|
; WTF is the macro unable to be evaluated when the same code works as part of *defined-macros*???
|
|
;
|
|
(define-syntax test
|
|
(er-macro-transformer
|
|
(lambda (expr rename compare)
|
|
(cond ((null? (cdr expr)) #t)
|
|
; (cond ((null? (cdr expr)))
|
|
((null? (cddr expr)) (cadr expr))
|
|
(else (list (rename 'if) (cadr expr)
|
|
(cons (rename 'and) (cddr expr))
|
|
#f))))))
|
|
|
|
(define-syntax or
|
|
(er-macro-transformer
|
|
(lambda (expr rename compare)
|
|
(cond ((null? (cdr expr)) #f)
|
|
((null? (cddr expr)) (cadr expr))
|
|
(else
|
|
(list (rename 'let) (list (list (rename 'tmp) (cadr expr)))
|
|
(list (rename 'if) (rename 'tmp)
|
|
(rename 'tmp)
|
|
(cons (rename 'or) (cddr expr)))))))))
|
|
|
|
(write (test 1 2 3))
|
|
(write (or 1 2 3 'or))
|
|
(write (or #f 2 3 'or))
|
|
;(test 'done)
|
|
'done
|