WRAPPING UP 243

(defn safe-ant-name [n]

(if (resolve n) (symbol (str "ant-" n)) n))

(defmacro define-all-ant-tasks []

`(do ~@(map (fn [n] `(define-ant-task ~(safe-ant-name n) ~n)) (task-names))))

(define-all-ant-tasks)

7.6 Wrapping Up

Clojure macros let you automate patterns in your code. Because they transform source code at macro expansion time, you can use macros to abstract away any kind of pattern in your code. You are not limited to working within Clojure. With macros, you can extend Clojure into your problem domain.

Internally, Clojure uses macros to implement many of its most powerful features. One of these features is multimethods, to which we turn next.

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