RosettaCodeData/Task/Metaprogramming/Ol/metaprogramming-1.ol

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(define-syntax define
(syntax-rules (lambda) ;λ
((define ((name . args) . more) . body)
(define (name . args) (lambda more . body)))
((define (name . args) . body)
(setq name (letq (name) ((lambda args . body)) name)))
((define name (lambda (var ...) . body))
(setq name (letq (name) ((lambda (var ...) . body)) name)))
((define name val)
(setq name val))
((define name a b . c)
(define name (begin a b . c)))))