cgrand

;; For ClojureDart in a bout of NIH syndrome we rewrote Clojure for
;; it seems to be faster because we don't use concat
(defmacro for
  "List comprehension. Takes a vector of one or more
   binding-form/collection-expr pairs, each followed by zero or more
   modifiers, and yields a lazy sequence of evaluations of expr.
   Collections are iterated in a nested fashion, rightmost fastest,
   and nested coll-exprs can refer to bindings created in prior
   binding-forms.  Supported modifiers are: :let [binding-form expr ...],
   :while test, :when test.