Created
March 13, 2012 18:40
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Clojure `thrush` operator macro in Common Lisp
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(defmacro -> (x &rest args) | |
"A Common-Lisp implementation of the Clojure `thrush` operator." | |
(destructuring-bind (form &rest more) | |
args | |
(cond | |
(more `(-> (-> ,x ,form) ,@more)) | |
((and (consp form) | |
(or (eq (car form) 'lambda) | |
(eq (car form) 'function))) | |
`(funcall ,form ,x)) | |
((consp form) `(,(car form) ,x ,@(cdr form))) | |
(form `(,form ,x)) | |
(t x)))) | |
#+test | |
(equal (-> 0 | |
(lambda (x) (+ 1 x)) | |
(cons 1) | |
(cons 2)) | |
'((1 . 1) . 2)) |
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