Isn't it possible to solve this with a simple macro?
(case-dialect
:clojure (... clojure code ...)
:clojurescript (... clojurescript code ...))
Then, in jvm clojure, it could be implemented as:
(defmacro case-dialect [& {:keys [clojure]}] clojure)
and in clojurescript:
(defmacro case-dialect [& {:keys [clojurescript]}] clojurescript)
Alternatively, we could have a def, say *clojure-dialect*, then:
(defmacro case-dialect [& {:as m}] (get m *clojure-dialect*))
(although the dialect should probably be part of *clojure-version* ... you
get the idea)
Jonathan
On Thu, Mar 7, 2013 at 10:04 AM, Akhil Wali <akhil.wali...@gmail.com> wrote:
> IMHO features expressions should be evaluated at read-time only.
> Putting it off till the compilation phase only complicates things.
> So I'm actually favoring a preprocessing step like here -
> http://dev.clojure.org/display/design/Feature+Expressions?focusedCommentId=6390066#comment-6390066
>
> The idea is simple; when the reader parses a sexpr, and if there's a
> feature expression,then only use the part that's relevant to the current
> Clojure dialect.
> The only complication with this scheme is that all information in
> *clojure-version* is related to the version numbers only; however, this
> could be changed easily.
>
>
>
> On Thu, Mar 7, 2013 at 7:46 AM, Brent Millare <brent.mill...@gmail.com>wrote:
>
>> +1
>>
>> Isn't is possible to accomplish all these efforts using tagged literals?
>> https://github.com/miner/wilkins
>>
>> This way the facilities for read-time code generation can be customized
>> and any reader that supports tagged-literals will support this. All of this
>> is data provided as arguments, no evaluation. Evaluation happens from the
>> tag function.
>>
>> On Wednesday, March 6, 2013 8:24:15 PM UTC-5, Brian Goslinga wrote:
>>>
>>> Do we really need new syntax for feature expressions? Although it would
>>> be more ugly than CL's feature expressions, we could use a reader literal.
>>> For example #feature [<feature expression> <value>]. Using a reader literal
>>> is simple, compatible with EDN, and allows for the feature expressions to
>>> be backported to an older version of Clojure using a library.
>>
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>
>
>
> --
> Akhil Wali
>
> # http://github.com/darth10 <https://github.com/darth10>
> # http://darth10.github.com
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