Try something like:
(let [x (with-meta (gen-sym) {:tag String}]
(defn foo [~x] ...))
- James
On 4 December 2013 19:55, dm3 <[email protected]> wrote:
> Hello,
>
> I've been having a little problem when trying to generate java interop
> code and avoid reflection warnings. I have to generate a bunch of
> functions which delegate to java constructors, like this:
>
> (defn mk-a [x y z] (A. x y z))
> (defn mk-b [x y z] (B. x y z))
>
> The main reason here is to be able to `apply` the functions to lists of
> arguments, as java constructors cannot be applied (AFAIK, would be great if
> I'm wrong - would solve a lot of my problems!).
>
> The problem is - java constructors are overloaded:
>
> A(String x, int y, int z)
> A(BigDecimal x, String y, int z)
> ...
>
> I was trying to generate such functions in my top-level form, like this:
>
> (doseq [[java-ctor fn-name] [['A. 'mk-a] [B'. 'mk-b]]
> (eval `(defn ~fn-name [x# y# z#]
> (cond (string? x#)
> (~java-ctor ^String x# y# z#)
>
> (string? y#)
> (~java-ctor x# ^String y# z#))))
>
> Which still generates reflection warnings as type hints are read by the
> reader and applied to the forms read by the eval, not the result of the
> eval itself (please, correct me if I'm wrong here).
>
> I have a suspicion that the way I'm approaching the problem is wrong :)
> How should I go around solving this problem?
>
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