Thanks Alan. Hope this will be changed. On 2月14日, 上午3时06分, Alan Malloy <a...@malloys.org> wrote: > If this is a bug, it's in eval, not in map. eval apparently just > doesn't like to be handed lazy sequences, or something: > > repl-1=> (eval `(quote ~(lazy-seq nil))) > CompilerException java.lang.UnsupportedOperationException: Unknown > Collection type, compiling:(NO_SOURCE_PATH:14) > > ;; just to demonstrate that these are the same value: > repl-1=> (= `(quote ~(lazy-seq nil)) > repl-1=* `'~(map identity ())) > true > > This looks like it's caused > byhttps://github.com/clojure/clojure/blob/master/src/jvm/clojure/lang/C... > - it should probably be testing for ISeq, not IPersistentList. > > On Feb 13, 1:02 am, Eric Fong <fangyi...@gmail.com> wrote: > > > > > > > > > => (eval `'~(map identity [1 2 3])) > > (1 2 3) > > > => (eval `'~(map identity ())) > > CompilerException java.lang.UnsupportedOperationException: Unknown > > Collection type, compiling:(NO_SOURCE_PATH:135) > > > => (eval `'~(map identity nil)) > > CompilerException java.lang.UnsupportedOperationException: Unknown > > Collection type, compiling:(NO_SOURCE_PATH:138) > > > try the above in repl, clojure 1.3, why the exception occured?
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