exclude only annotation

[Carlos Fontes]

Lets say I have a cljx source with a ns declaration like this:

(ns #+clj ^{:doc "spam" :author "me"}
  my.ns)

The resulting .cljs would be:

(ns
       )

but I would wish this in some way:

(ns
  my.ns)

How do I prevent the ^{...} from being included in the cljs generated source, but not my.ns also?

[Chas Emerick]

You can't, at least not like that. The metadata map is just as much much a part of the my.ns value as the symbol itself.

You can elide entries in the metadata map, e.g.:

(ns ^{#+clj :doc #+clj "spam" :author "me"} my.ns)

[Carlos Fontes]

@cemerick that was smart!

[Carlos Fontes]

Finally I actually tried to use the code generated for Clojurescript:

(ns ^{} my.ns)

in the REPL, but got this exception, when running (ns cljs.user (:use my.ns)):

clojure.lang.ExceptionInfo: nth not supported on this type: Symbol at line 1  {:tag :cljs/analysis-error, :file nil, :line 1, :column 1}

After removing the #+clj, it works of course.
It seems not even ^{} is accepted in Clojurescript. Any ideas?

[Chas Emerick]

Insofar as namespace metadata is basically ignored by ClojureScript (not that it has much of a role in Clojure, for that matter), I'd suggest something like:

(ns #+cljs my.ns
     #+clj ^{:metadata :here} my.ns
    ...)

[Carlos Fontes]

It doesn't seem to ignore it here because it always throws an exception. Nevertheless, that alternative is simply awesome!

[Chas Emerick]

By "ignored", I meant that it has no practical use AFAIK.