My guess: to allow functions with :inline metadata to still be used as
higher order (first class) functions.
Note, the fn specified by :inline is more of a macro than a function, it's
called at compile time.
How would the following work without a function body?
(map pos? [-1 0 1])
definline gives you what you're asking for, a way to define an :inline
function without repetition.
--Aaron
On Sun, Jul 15, 2012 at 10:43 PM, dennis zhuang <killme2...@gmail.com>wrote:
> Inline a function in clojure is easy,just define a :inline form to meta
> map and it will be inlined into the form which calls it.For example,the
> pos? function in clojure.core:
>
> (defn pos?
>
> "Returns true if num is greater than zero, else false"
>
> {
>
> :inline (fn [x] *`(. clojure.lang.Numbers (isPos ~x))*)
>
> :added "1.0"}
>
> [x] *(. clojure.lang.Numbers (isPos x))*)
>
>
> But i have a question about the usage,why we have to write the body
> form(Here is *(. clojure.lang.Numbers (isPos ~x))*) twice both in
> function's body and :inline value? Why :inline form could not just use the
> form in function's body instead of duplicate definition?
>
>
> --
> 庄晓丹
> Email: killme2...@gmail.com xzhu...@avos.com
> Site: http://fnil.net
> Twitter: @killme2008
>
>
>
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