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I have clojurescript successfully importing macros from other namespaces. But I wonder whether a single-file construction is/should be possible with clojure 1.7, such that a macro can be defined and used. What I have tried does not work, but maybe I've missed a detail someplace.
(ns cljc.core)
#?(:cljs
(enable-console-print!))
#?(:clj
(defmacro list-macro [x y]
`(list ~x ~y)))
(defn foo [a]
(println (list-macro a a)))
(foo :a)
This form fails with list-macro being undefined when compiling cljs; if I remove the :clj guard around list-macro, then defmacro is undefined within the cljs compilation. Is there a way?
436
The rationale for ClojureScript is much the same as for Clojure, with JavaScript in the role of platform, and additional emphasis on the reach of JS, as it is obviously not as rich a platform. A deeper discussion on ClojureScript's rationale can be found elsewhere on this site.
Clojure has a programmatic macro system which allows the compiler to be extended by user code. Macros can be used to define syntactic constructs which would require primitives or built-in support in other languages. Many core constructs of Clojure are not, in fact, primitives, but are normal macros.
CLJC. Church of The Lord Jesus Christ.
Yes, there is a way for a single file construction.
(ns cljc.core
#?(:cljs (:require-macros [cljc.core :refer [list-macro]])))
#?(:clj
(defmacro list-macro [x y]
;; ...
Assumedly one of the next CLJS compiler versions will do the import automatically.
140
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