Hi,
In my recent macro-writing adventure, I discovered that (gensym) is
not actually equivalent to using #.
Can someone explain to me how # actually works in backquoted form?
eg. This doesn't work:
(defmacro deftemp [name text]
`(do (def temp# ~text)
(defn ~name [] temp#)))
In repl:
(deftemp temp1 "temp1")
(deftemp temp2 "temp2")
(temp1) returns "temp2" <= incorrect.
BUT this does work:
(defmacro deftemp [name text]
(let [temp (gensym "temp")]
`(do (def ~temp ~text)
(defn ~name [] ~temp))))
In Repl:
(deftemp temp1 "temp1")
(deftemp temp2 "temp2")
(temp1) correct returns "temp1" <= correct.
I originally thought that # uses (gensym) internally. But it seems
that's not the case?
Thanks for your help
-Patrick
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