Hi,
I'm trying to wrap my head around the role of the #_ macro and how it's
used in core.cljs.
Can some explain, why it is used to prefix (throw.. ) in
(deftype EmptyList [meta]
...
...
IStack
(-peek [coll] nil)
(-pop [coll] #_(throw (js/Error. "Can't pop empty list")))
or in
(deftype Vector [meta array]
...
...
IIndexed
(-nth [coll n]
(if (and (<= 0 n) (< n (.-length array)))
(aget array n)
#_(throw (js/Error. (str "No item " n " in vector of length "
(.-length array))))))
but not in
(deftype Vector [meta array]
...
...
(-pop [coll]
(if (> (.-length array) 0)
(let [new-array (aclone array)]
(. new-array (pop))
(Vector. meta new-array))
(throw (js/Error. "Can't pop empty vector"))))
there are other examples at ln 68, ln 127, ln 146 for other forms.
Thx
Las
--
László Török
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