Thanks, David! I tried that already and it didn't work:
clojure.lang.Compiler$CompilerException:
java.lang.ClassNotFoundException: cljs.core,
compiling:(macromath/macros.clj:58:1)
I also tried to require cljs.core in that macro's namespace, but then
it complains this way:
clojure.lang.Compiler$CompilerException: java.lang.RuntimeException:
Can't take value of a macro: #'cljs.core/+,
compiling:(macromath/macros.clj:59:1)
Hmmm....
On 23 February 2014 19:52, David Nolen <dnolen.li...@gmail.com> wrote:
> You shouldn't use js*, and in this case it can be avoided. The problem
> you're encountering is a long outstanding wart that ClojureScript macros
> resolve symbols in Clojure not ClojureScript. Instead of + (which is
> actually clojure.core/+) you want to specify cljs.core/+:
>
> (defmathop cljs.core/+ cljs.core/+)
>
>
> On Sun, Feb 23, 2014 at 2:47 PM, Karsten Schmidt <i...@toxi.co.uk> wrote:
>>
>> After taking another look through cljs.core I managed to reformulate
>> my macro using js* templates, but am still wondering why the "normal"
>> (and cross-platform) solution doesn't work and also if using the js*
>> way is actually safe in the future (i.e. not just a current
>> implementation detail)?
>>
>> (defmacro defmathop
>> "Constructs macro to build inlined nested expressions with f applied
>> to inner pairs and f2 to combine results."
>> [name f f2]
>> `(defmacro ~name
>> ([a# b# c#]
>> (list '~'js* (str "((~{} " ~f " ~{}) " ~f2 " ~{})")
>> a# b# c#))
>> ([a# b# c# d#]
>> (list '~'js* (str "((~{} " ~f " ~{}) " ~f2 " (~{} " ~f " ~{}))")
>> a# b# c# d#))))
>>
>> (defmathop madd "*" "+")
>>
>> Thanks for any answers!
>>
>> On 23 February 2014 16:28, Karsten Schmidt <i...@toxi.co.uk> wrote:
>> > Btw. My cljs example above is slightly wrong due to my simplifying the
>> > email
>> > example. I originally used this ns declaration
>> >
>> > (ns macromath.test
>> > (:require-macros [macromath.core :as m]))
>> >
>> > ...and then of course referred to (m/madd ...)
>> >
>> > But the issue remains regardless...
>> >
>> > On 23 Feb 2014 15:59, "Karsten Schmidt" <i...@toxi.co.uk> wrote:
>> >>
>> >> Hi, I've written a macro to build inline expanded math expressions and
>> >> it's working well in Clojure, however fails with a compile exception
>> >> in CLJS. I'm not sure if this is a shortcoming of the CLJS compiler or
>> >> (much more likely) a mistake with my macro.
>> >>
>> >> (ns macromath.core)
>> >>
>> >> (defmacro defmathop
>> >> "Constructs a macro to build inlined nested expressions with f
>> >> applied
>> >> to inner pairs and f2 to combine results."
>> >> [name f f2]
>> >> `(defmacro ~name
>> >> ([a# b# c#] `(~~f2 (~~f ~a# ~b#) ~c#))
>> >> ([a# b# c# d#] `(~~f2 (~~f ~a# ~b#) (~~f ~c# ~d#)))))
>> >>
>> >> (defmathop add + +)
>> >> (defmathop sub - -)
>> >> (defmathop mul * *)
>> >> (defmathop div / /)
>> >> (defmathop madd * +)
>> >> (defmathop msub * -)
>> >> (defmathop addm + *)
>> >> (defmathop subm - *)
>> >>
>> >> lein repl
>> >>
>> >> (use 'macromath.core)
>> >> (madd 2 3 4)
>> >> ; 10
>> >> (madd 2 3 4 5)
>> >> ; 26
>> >>
>> >> My short CLJS test is as follows:
>> >>
>> >> (ns macromath.test
>> >> (:use-macros [macromath.core]))
>> >>
>> >> (defn ^:export main
>> >> []
>> >> (.log js/console (madd 2 3 4 5)))
>> >>
>> >> lein cljsbuild fails with this exception:
>> >> Caused by: java.lang.IllegalArgumentException: No method in multimethod
>> >> 'emit-constant' for dispatch value: class clojure.core$_PLUS_
>> >>
>> >> How can I rewrite the macro so it properly works with the CLJS
>> >> compiler?
>> >> Thank you!
>>
>>
>>
>> --
>> Karsten Schmidt
>> http://postspectacular.com | http://toxiclibs.org | http://toxi.co.uk
>>
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>
>
> --
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--
Karsten Schmidt
http://postspectacular.com | http://toxiclibs.org | http://toxi.co.uk
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