eliminate last cljs compiler warning

CHANGES.md

@@ -2,6 +2,7 @@
 * More efficient inline caching for Clojure version, now inline caching is always within 5% of manually precompiled code
 * Significant performance improvement for ALL transform on maps for Clojure version (25% on simple benchmarks)
 * Significant performance improvements for FIRST/LAST for vectors
+* Eliminated compiler warnings when used in ClojureScript
 
 ## 0.11.0
 * New `path` macro does intelligent inline caching of the provided path. The path is factored into a static portion and into params which may change on each usage of the path (e.g. local parameters). The static part is factored and compiled on the first run-through, and then re-used for all subsequent invocations. As an example, `[ALL (keypath k)]` is factored into `[ALL keypath]`, which is compiled and cached, and `[k]`, which is provided on each execution. If it is not possible to precompile the path (e.g. [ALL some-local-variable]), nothing is cached and the path will be compiled on each run-through.

src/clj/com/rpl/specter/impl.cljx

@@ -43,16 +43,18 @@
 (defn throw-illegal [& args]
   (throw (js/Error. (apply str args))))
 
-;; these macroexpand functions are for path macro in bootstrap cljs
-;; environment
+;; these macroexpand functions are for path macro in bootstrap cljs environment
 #+cljs
 (defn macroexpand'
   [form]
-  (binding [^:cljs.analyzer/no-resolve cljs.js/*eval-fn*
-            ^:cljs.analyzer/no-resolve cljs.js/js-eval]
+  (let [orig-eval-fn ^:cljs.analyzer/no-resolve cljs.js/*eval-fn*]
+    (try
+      (set! ^:cljs.analyzer/no-resolve cljs.js/*eval-fn* ^:cljs.analyzer/no-resolve cljs.js/js-eval)
       (^:cljs.analyzer/no-resolve cljs.js/eval (^:cljs.analyzer/no-resolve cljs.js/empty-state)
         `(macroexpand (quote ~form))
-      identity)))
+        identity)
+      (finally
+        (set! ^:cljs.analyzer/no-resolve cljs.js/*eval-fn* orig-eval-fn)))))
 
 #+cljs
 (defn do-macroexpand-all