On Fri, Mar 11, 2011 at 11:52 PM, Stuart Sierra <the.stuart.sie...@gmail.com> wrote: > `eval` invokes the Clojure compiler, which transforms data structures into > Java bytecode. The Clojure compiler understands Clojure data structures > like lists, vectors, and symbols, plus a few Java types like String and > numbers. It doesn't know what to do with a java.util.Date. "Can't embed > object in code" is the compiler telling you "I don't know what to do with > this."
Yes, but "create a static final member in the class I'm generating bytecode for, stuff the object in that static member, and embed a reference to the static member here" seems like a sensible thing for it to do. private static final Date blah = somedate; ... something.somemethod(blah); works in javac, but clojure's compiler hates (eval '(.somemethod something ~somedate)) for whatever reason. > The #= is a Clojure reader macro that means "evaluate the following code." > The error message "maybe print-dup not defined" is suggesting that, if you > really did mean to stick a java.util.Date in your compiled code, you have to > provide your own implementation of print-dup. Specifically, you need a > method of print-dup that takes a java.util.Date and returns a data structure > representing the Clojure code that *creates* a java.util.Date. So, there is a workaround of sorts. A general one for serializable objects could even be constructed: serialize to a byte array, embed the byte array as a seq in code that turns it back into a byte array and then deserializes an object from it. Not very efficient though. A true fix requires changing the compiler to add static final members to the generated class, as suggested above. -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en
