DATA (defmacro! cond (fn* (& xs) (if (> (count xs) 0) (list 'if (first xs) (if (> (count xs) 1) (nth xs 1) (throw "odd number of forms to cond")) (cons 'cond (rest (rest xs)))))))
DATA (defmacro! or (fn* (& xs) (if (empty? xs) nil (if (= 1 (count xs)) (first xs) `(let* (or_FIXME ~(first xs)) (if or_FIXME or_FIXME (or ~@(rest xs))))))))
DATA (def! *host-language* "BBC BASIC V")
-DATA (def! notimpl (fn* (& _) (throw "Not implemented")))
-DATA (def! seq notimpl)
DATA ""
REPEAT
READ form$