Why do some reader tags throw when evaluated on their own?

Question

For example, take the #ordered/map tag (reader kv defined here, data reader fn). If I eval the following code, I get an exception thrown.

(do #ordered/map ([:b 2] [:a 1] [:d 4]))
Syntax error compiling fn* at (/src/example.clj:6:3).
	at clojure.lang.Compiler.analyzeSeq(Compiler.java:7119)
java.lang.IllegalArgumentException: Unable to resolve classname: IPersistentMap
	at clojure.lang.Compiler$HostExpr.tagToClass(Compiler.java:1129)
	at clojure.lang.Compiler.tagClass(Compiler.java:8693)
	at clojure.lang.Compiler$ObjExpr.emitValue(Compiler.java:4810)
	at clojure.lang.Compiler$ObjExpr.emitConstants(Compiler.java:4938)
	at clojure.lang.Compiler$ObjExpr.compile(Compiler.java:4616)
	at clojure.lang.Compiler$FnExpr.parse(Compiler.java:4110)
	at clojure.lang.Compiler.analyzeSeq(Compiler.java:7109)
	at clojure.lang.Compiler.analyze(Compiler.java:6793)
	at clojure.lang.Compiler.eval(Compiler.java:7178)
	at clojure.lang.Compiler.eval(Compiler.java:7171)
	at clojure.lang.Compiler.eval(Compiler.java:7136)
	at clojure.core$eval.invokeStatic(core.clj:3202)
	at clojure.core$eval.invoke(core.clj:3198)
	at nrepl.middleware.interruptible_eval$evaluate$fn__939.invoke(interruptible_eval.clj:91)
	at clojure.main$repl$read_eval_print__9110$fn__9113.invoke(main.clj:437)
	at clojure.main$repl$read_eval_print__9110.invoke(main.clj:437)
	at clojure.main$repl$fn__9119.invoke(main.clj:458)
	at clojure.main$repl.invokeStatic(main.clj:458)
	at clojure.main$repl.doInvoke(main.clj:368)
	at clojure.lang.RestFn.invoke(RestFn.java:1523)
	at nrepl.middleware.interruptible_eval$evaluate.invokeStatic(interruptible_eval.clj:84)
	at nrepl.middleware.interruptible_eval$evaluate.invoke(interruptible_eval.clj:56)
	at nrepl.middleware.interruptible_eval$interruptible_eval$fn__965$fn__969.invoke(interruptible_eval.clj:155)
	at clojure.lang.AFn.run(AFn.java:22)
	at nrepl.middleware.session$session_exec$main_loop__1067$fn__1071.invoke(session.clj:190)
	at nrepl.middleware.session$session_exec$main_loop__1067.invoke(session.clj:189)
	at clojure.lang.AFn.run(AFn.java:22)
	at java.base/java.lang.Thread.run(Thread.java:829)

The map is read and the data reader fn is called as expected.

(def omap #ordered/map ([:b 2] [:a 1] [:d 4]))
=> #'example/omap
(type omap)
=> flatland.ordered.map.OrderedMap

It's only when eval'ing just the tagged literal that the ex is thrown. Any idea why this is happening?

Answer 1

Looks like a place in the compiler where the class name is not being resolved against the imports?

Logged as https://clojure.atlassian.net/browse/CLJ-2654

Comments

With CLJ-1180 (https://clojure.atlassian.net/browse/CLJ-1180) being resolved, this can be closed:

    user=> (do #ordered/map ([:b 2] [:a 1] [:d 4]))
    {:b 2, :a 1, :d 4}

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Thanks, done