33 lines
563 B
Common Lisp
33 lines
563 B
Common Lisp
(defmacro defun (name args body)
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`(define ,name (lambda ,args ,body)))
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(defmacro cond (expr . rest)
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(if (not expr)
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nil
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(let ((test (car expr)))
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`(if ,test
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(progn ,test ,@(cdr expr))
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(cond ,@rest)))))
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(defmacro and (expr . rest)
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(if (not rest)
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expr
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(if (cond (not expr) nil)
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`(and ,@rest))))
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(defmacro or (expr . rest)
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(if rest
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(cond (expr) (`(or ,@rest)))
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expr))
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(defmacro when (test . rest)
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`(if ,test
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(progn ,@rest)))
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(defmacro unless (test . rest)
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`(if (not ,test)
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(progn ,@rest)))
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(defun list (x . y) (cons x y))
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