ok looks like it's not impossible:
=> *(defmacro mew [cls & restt]
(let [c a]
`(eval (new ~a ~@restt))
)
)*
#'runtime.q/mew
=> *(let [a java.lang.RuntimeException]
(mew a)
)*
#<RuntimeException java.lang.RuntimeException>
On Thu, Feb 14, 2013 at 10:53 PM, AtKaaZ <atk...@gmail.com> wrote:
> I figure since new is expecting a class at compiletime, we can never pass
> it a class that we evaluate at runtime(those locals), ergo => impossible to
> macro around "new" like that
>
> like this => impossible:
> *(let [a java.lang.RuntimeException]
> (macro-that-eventually-calls-new a))*
>
> maybe someone could suggest another way? clojure.reflect ?
>
>
>
> On Thu, Feb 14, 2013 at 10:40 PM, AtKaaZ <atk...@gmail.com> wrote:
>
>> thanks for the reply,
>>
>> => *(defmacro mew [cls & args]
>> `(new ~cls ~@args))*
>> #'runtime.q/mew
>> =>* (let [a java.lang.RuntimeException]
>> (mew a)
>> )*
>>
>> CompilerException java.lang.IllegalArgumentException: Unable to resolve
>> classname: a, compiling:(NO_SOURCE_PATH:2:3)
>>
>> that would be the equivalent macro of what *new* is doing
>> it's like
>> *(new a)*
>> CompilerException java.lang.IllegalArgumentException: Unable to resolve
>> classname: a, compiling:(NO_SOURCE_PATH:2:3)
>>
>>
>> This is the goal:
>>
>> The goal is to can write this form:
>> => *(let [a java.lang.RuntimeException]
>> (new a))*
>>
>> but I think it's impossible, at least by using "new" it is
>>
>>
>> On Thu, Feb 14, 2013 at 10:34 PM, Andy Fingerhut <
>> andy.finger...@gmail.com> wrote:
>>
>>>
>>> On Feb 14, 2013, at 1:27 PM, AtKaaZ wrote:
>>>
>>> The goal is to can write this form:
>>> => *(let [a java.lang.RuntimeException]
>>> (new a)
>>> )*
>>> CompilerException java.lang.IllegalArgumentException: Unable to resolve
>>> classname: a, compiling:(NO_SOURCE_PATH:2:3)
>>>
>>> attempt with macro:
>>> =>* (defmacro mew [cls & restt]
>>> `(new ~(eval cls) ~@restt)
>>> )*
>>> #'runtime.q/mew
>>>
>>>
>>> This is probably your closest attempt. Try this variation on the above:
>>>
>>> (defmacro mew [cls & args]
>>> `(new ~cls ~@args))
>>>
>>> user=> (macroexpand-1 '(mew java.lang.RuntimeException))
>>> (new java.lang.RuntimeException)
>>>
>>> Andy
>>>
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>>>
>>
>>
>>
>> --
>> Please correct me if I'm wrong or incomplete,
>> even if you think I'll subconsciously hate it.
>>
>>
>
>
> --
> Please correct me if I'm wrong or incomplete,
> even if you think I'll subconsciously hate it.
>
>
--
Please correct me if I'm wrong or incomplete,
even if you think I'll subconsciously hate it.
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