Re: how do I get primitive typ hints to appear in the output of a macro?
yes that's the reason thank you very much!
Meikel also pointed me in that direction with ; (meta (first (nth
(macroexpand-1 '(aTest)) 2))) => {:tag long} and on ihis blog
*http://kotka.de/blog/2009/12/with-meta_and_the_reader.html*<http://kotka.de/blog/2009/12/with-meta_and_the_reader.html>
which
has been very helpful
Many Thanx
Am Donnerstag, 19. Juli 2012 05:49:02 UTC+2 schrieb dgrnbrg:
> I don't think that the type hint will appear in the printed output. It is
> metadata, so it won't be shown by the printer. If you try (let [[_ _ [b]
> (macroexpand-1 '(aTest))] (meta b)) you should see {:tag long}.
>
> On Wednesday, July 18, 2012 7:55:31 AM UTC-4, john wrote:
>>
>> Hello,
>> how do I get primitive typ hints to appear in the output of a macro?
>>
>> like :
>> (defmacro aTest []
>> `(~'defn ~'aFun [^long ~'b ] (meta ~'b) ))
>>
>> (macroexpand-1 '(aTest))
>> yields :
>>
>> (aFun 7)
>> (macroexpand-1 '(aTest))
>> yields :
>>
>> (defn aFun [b] (clojure.core/meta b))
>>
>> but I wold like it to be :
>> (defn aFun [^long b] (clojure.core/meta b))
>>
>> Many greetings
>> John
>>
>>
>>
>
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Re: how do I get primitive typ hints to appear in the output of a macro?
I don't think that the type hint will appear in the printed output. It is
metadata, so it won't be shown by the printer. If you try (let [[_ _ [b]
(macroexpand-1 '(aTest))] (meta b)) you should see {:tag long}.
On Wednesday, July 18, 2012 7:55:31 AM UTC-4, john wrote:
>
> Hello,
> how do I get primitive typ hints to appear in the output of a macro?
>
> like :
> (defmacro aTest []
> `(~'defn ~'aFun [^long ~'b ] (meta ~'b) ))
>
> (macroexpand-1 '(aTest))
> yields :
>
> (aFun 7)
> (macroexpand-1 '(aTest))
> yields :
>
> (defn aFun [b] (clojure.core/meta b))
>
> but I wold like it to be :
> (defn aFun [^long b] (clojure.core/meta b))
>
> Many greetings
> John
>
>
>
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Re: how do I get primitive typ hints to appear in the output of a macro?
Hi,
the correct syntax is
(defmacro aTest
[]
`(defn ~'aFun [~(with-meta 'b {:tag 'long})]))
; (meta (first (nth (macroexpand-1 '(aTest)) 2))) => {:tag long}
The 'long might also be a `long. I'm not sure about that one.
Kind regards
Meikel
PS: Shameless self-promotion:
http://kotka.de/blog/2009/12/with-meta_and_the_reader.html
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Re: how do I get primitive typ hints to appear in the output of a macro?
:-) Sorry, it has me stumped too.
Hopefully someone can clarify.
Ambrose
On Wed, Jul 18, 2012 at 8:28 PM, john wrote:
> Hi Ambrose,
> I liked your core.logic video very much!
> But no the code doeen't seem to work:
>
> (defmacro aTest []
> `(~'defn ~'aFun [^{:tag ~'long} ~'b ] (meta ~'b) ))
>
> and I also tried:
>
> (defmacro aTest []
> (list 'defn 'aFun (vector (with-meta 'b {:tag long})) '(meta b)))
> before
>
> (aFun 8) yields nil
>
> So I think the type hint are not on the param
>
> Am Mittwoch, 18. Juli 2012 14:18:21 UTC+2 schrieb Ambrose
> Bonnaire-Sergeant:
>
>> Hi John,
>>
>> The type hint ^long expands to ^{:tag long}.
>>
>> So something like this should do the trick (untested).
>>
>> (defmacro aTest []
>> `(~'defn ~'aFun [^{:tag '~'long ~'b ] (meta ~'b) ))
>>
>> Thanks,
>> Ambrose
>>
>>
>> Hello,
>>> how do I get primitive typ hints to appear in the output of a macro?
>>>
>>> like :
>>> (defmacro aTest []
>>> `(~'defn ~'aFun [^long ~'b ] (meta ~'b) ))
>>>
>>> (macroexpand-1 '(aTest))
>>> yields :
>>>
>>> (aFun 7)
>>> (macroexpand-1 '(aTest))
>>> yields :
>>>
>>> (defn aFun [b] (clojure.core/meta b))
>>>
>>> but I wold like it to be :
>>> (defn aFun [^long b] (clojure.core/meta b))
>>>
>>> Many greetings
>>> John
>>>
>>>
>>>
>>
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Re: how do I get primitive typ hints to appear in the output of a macro?
Hi Ambrose,
I liked your core.logic video very much!
But no the code doeen't seem to work:
(defmacro aTest []
`(~'defn ~'aFun [^{:tag ~'long} ~'b ] (meta ~'b) ))
and I also tried:
(defmacro aTest []
(list 'defn 'aFun (vector (with-meta 'b {:tag long})) '(meta b)))
before
(aFun 8) yields nil
So I think the type hint are not on the param
Am Mittwoch, 18. Juli 2012 14:18:21 UTC+2 schrieb Ambrose Bonnaire-Sergeant:
> Hi John,
>
> The type hint ^long expands to ^{:tag long}.
>
> So something like this should do the trick (untested).
>
> (defmacro aTest []
> `(~'defn ~'aFun [^{:tag '~'long ~'b ] (meta ~'b) ))
>
> Thanks,
> Ambrose
>
>
> Hello,
>> how do I get primitive typ hints to appear in the output of a macro?
>>
>> like :
>> (defmacro aTest []
>> `(~'defn ~'aFun [^long ~'b ] (meta ~'b) ))
>>
>> (macroexpand-1 '(aTest))
>> yields :
>>
>> (aFun 7)
>> (macroexpand-1 '(aTest))
>> yields :
>>
>> (defn aFun [b] (clojure.core/meta b))
>>
>> but I wold like it to be :
>> (defn aFun [^long b] (clojure.core/meta b))
>>
>> Many greetings
>> John
>>
>>
>>
>
>
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Re: how do I get primitive typ hints to appear in the output of a macro?
Hi John,
The type hint ^long expands to ^{:tag long}.
So something like this should do the trick (untested).
(defmacro aTest []
`(~'defn ~'aFun [^{:tag '~'long ~'b ] (meta ~'b) ))
Thanks,
Ambrose
On Wed, Jul 18, 2012 at 7:55 PM, john wrote:
> Hello,
> how do I get primitive typ hints to appear in the output of a macro?
>
> like :
> (defmacro aTest []
> `(~'defn ~'aFun [^long ~'b ] (meta ~'b) ))
>
> (macroexpand-1 '(aTest))
> yields :
>
> (aFun 7)
> (macroexpand-1 '(aTest))
> yields :
>
> (defn aFun [b] (clojure.core/meta b))
>
> but I wold like it to be :
> (defn aFun [^long b] (clojure.core/meta b))
>
> Many greetings
> John
>
>
>
> --
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how do I get primitive typ hints to appear in the output of a macro?
Hello, how do I get primitive typ hints to appear in the output of a macro? like : (defmacro aTest [] `(~'defn ~'aFun [^long ~'b ] (meta ~'b) )) (macroexpand-1 '(aTest)) yields : (aFun 7) (macroexpand-1 '(aTest)) yields : (defn aFun [b] (clojure.core/meta b)) but I wold like it to be : (defn aFun [^long b] (clojure.core/meta b)) Many greetings John -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
