[英]compiling snippets of clojure(script) into javascript
Where in the clojurescript library can I access a function to compile snippets of clojure into js? 在clojurescript库中我可以访问一个函数来编译clojure的片段到js?
I need this to run in the clojure (not clojurescript) repl: 我需要这个在clojure (而不是clojurescript)repl中运行:
(->js '(fn [x y] (+ x y)))
=> "function(x,y){return x+y}"
(require '[cljs.analyzer.api :refer [analyze empty-env]])
(require '[cljs.compiler.api :refer [emit]])
(let [ast (analyze (empty-env) '(defn plus [a b] (+ a b)))]
(emit ast))
;; result
"cljs.user.plus = (function cljs$user$plus(a,b){\nreturn (a + b);\n});\n"
(require '[cljs.js :refer [empty-state compile-str]])
(compile-str (empty-state) "(defn add [x y] (+ x y))" #(println (:value %)))
;; Output (manually formatted for easier reading)
cljs.user.add = (function cljs$user$add(x,y){
return (x + y);
});
compile-str
takes a callback as the last argument. compile-str
将回调作为最后一个参数。 It will be called with a map either with a key :value
containing result JS as a string or :error
with the compilation error. 它将使用带有键的映射调用:value
包含结果JS作为字符串的值或:error
带有编译错误的错误。
In both cases org.clojure/tools.reader
is needed on your classpath. 在这两种情况下,类路径都需要org.clojure/tools.reader
。
there is a lightweight alternative: https://github.com/kriyative/clojurejs which creates the right output asked by the question. 有一个轻量级的替代品: https : //github.com/kriyative/clojurejs ,它可以创建问题所要求的正确输出。
Examples can be seen here: https://github.com/kriyative/clojurejs/wiki/Examples 可以在这里看到示例: https : //github.com/kriyative/clojurejs/wiki/Examples
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