Print JavaScript Symbol with ClojureScript

Questions & Help How to?
1

Someone discussed in WeChat:

cljs.user=> (js* "Symbol('x')")
Cannot convert a Symbol value to a string
     Function.cljs.core.str.cljs$core$IFn$_invoke$arity$1 (NO_SOURCE_FILE <embedded>:642:77)
     Object.cljs.core.pr_writer_impl (NO_SOURCE_FILE <embedded>:1699:85)
     Object.cljs.core.pr_writer (NO_SOURCE_FILE <embedded>:1700:405)
     Object.cljs.core.pr_seq_writer (NO_SOURCE_FILE <embedded>:1701:51)
     Object.cljs.core.pr_sb_with_opts (NO_SOURCE_FILE <embedded>:1702:156)
     Object.cljs.core.pr_str_with_opts (NO_SOURCE_FILE <embedded>:1702:362)
     Function.cljs.core.pr_str.cljs$core$IFn$_invoke$arity$variadic (NO_SOURCE_FILE <embedded>:1706:84)
     (NO_SOURCE_FILE <embedded>:6231:98)
     lumo.pprint.data.LumoPrinter.fipp$visit$IVisitor$visit_unknown$arity$2 (NO_SOURCE_FILE <embedded>:6231:236)
     Object.fipp.visit.visit_unknown (NO_SOURCE_FILE <embedded>:5971:111)

Later I got answers from Slack, it should be:

cljs.user=> (js* "Symbol('x').toString()")
"Symbol(x)"

Yes, it’s just missing the pr-writer implementation.

And a better solution from rauh is like:

(extend-protocol IPrintWithWriter
    js/Symbol
    (-pr-writer [sym writer _]
      (-write writer (str "\"" (.toString sym) "\""))))

well… ES6…

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