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!
>

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