No problem Evan,

(def constants (atom ()))
(defn add-constant [name x]
     (let [sym (gensym name)]
       (reset! constants (cons ([sym x]) @constants)
    sym
))

Then when I produce code, I call add-constant and use the returned symbol.
(I only use it to produce new constants, which is the annoying part.
However, constants can be function)

At the end I call
(defmacro emit-all []
 `(do ~@(reduce (fn [l [sym definition] ] (cons `(def ~sym
~definition) l) () @constants )
   ))))


That's ugly and I would like to find better.

Nicolas.

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