I'm using core.async trying to create a macron a cljc file like this:

(defmacro go-catch [& body]
  `(async/go
     (try
       ~@body
       (catch #?(:clj Throwable :cljs :default) e# e#))))

the macro works fine on clojure, but on cljs every time I try to run it I get: java is not defined, you know what that's about?

@wilkerlucio If you load that macro using JVM ClojureScript, then the macro is being compiled as Clojure, thus taking the :clj branch and putting java.lang.Throwable into your ClojureScript code, I would guess.

humm, do you have an example on how should I handle this? I have to make a separated version for cljs?

This is the if-cljs stuff.. where you detect if you macro is being expanded for use in ClojureScript.

trying to find some examples for it, but google is not helping me much... do you know some place where I can see that in use?

nevermind, just found a thread with it 🙂

but that still doesn't seem to work in my case =/

Did your approach involve peeking in &env?

you mean the if-cljs?

By the way, vote for https://dev.clojure.org/jira/browse/CLJ-1293 as it would provide a portable solution 🙂

yeah, you said it doesn't work. Wondering what you tried

sure, I tried this:

(defmacro if-cljs
  [then else]
  (if (:ns &env) then else))

(defmacro go-catch [& body]
  `(async/go
     (try
       ~@body
       (catch (if-cljs :default Throwable) e# e#))))

and just voted, this error handling is surely something would be nice to have portable

I think you need to unquote your if-cljs form

(I could be wrong... let me look up how to use that thing again.)

unquoting seems to break the compilation

@wilkerlucio Right, your code above appears to be correct.

well, I got it working, but I had to duplicate the code across 2 different namespaces

I made async-clj and async-cljs, and the consumers now require like this:

[#?(:clj  com.wsscode.common.async-clj
        :cljs com.wsscode.common.async-cljs) :refer [go-catch]]

not ideal, but works, when that jira gets in will be awesome