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
>
> --
> 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
> ---
> You received this message because you are subscribed to the Google Groups
> "Clojure" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to clojure+unsubscr...@googlegroups.com.
> For more options, visit https://groups.google.com/groups/opt_out.
>
--
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
---
You received this message because you are subscribed to the Google Groups
"Clojure" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to clojure+unsubscr...@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.
