Well, that's sort of wanting to eat the cake and have it.
It's impossible to resolve a symbol where it isn't known where it came from,
if any resolving is to take place, it must assume to be in the current
namespace.
So yes, you're right; syntax-quote would work best here.
Jonathan
On Mon, May 9, 2011 at 5:41 PM, Simon Katz <nomisk...@gmail.com> wrote:
> On Mon, May 9, 2011 at 16:21, Jonathan Fischer Friberg <
> odysso...@gmail.com> wrote:
>
>> Q1 This macro captures the correct namespace:
>>
>> (defmacro new* [type-name-as-symbol & args]
>> `(clojure.lang.Reflector/invokeConstructor
>> (ns-resolve ~*ns* ~type-name-as-symbol)
>> (to-array '~args)))
>>
>
> Unfortunately that doesn't work -- it captures the namespace in which new*
> is called, but that may not be where the symbol is actually written.
> Consider this:
>
> (ns my-namespace
> (:refer dynamic-new))
>
> (defrecord MyRecord [a b c])
>
> (defn instantiate-using-parameter [type-name-as-symbol]
> (new* type-name-as-symbol 1 2 3))
>
> (in-ns 'another-namespace)
> (my-namespace/instantiate-using-parameter 'MyRecord)
> => #:my-namespace.MyRecord{:a 1, :b 2, :c 3}
>
> Again, the use of syntax-quote would qualify the symbol in the right
> namespace -- the one containing the source of the symbol.
>
> Simon
>
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