What I ended up doing was forward-declaring a wrapper to the constructor of the later class. I actually am implementing a protocol, but the concrete types representing the persistent and transient versions need to reference each other. Also, I'm using deftype over defrecord because I want the objects to be alternative map implementations, and I want mutable fields for the transients.
On Thursday, 21 April 2016 16:22:14 UTC-7, tbc++ wrote: > > Few things to consider: code against protocols where possible (removes the > need to forward declare methods). Forward declare the constructor functions: > > (declare ->Foo) > > ... > > (defn some-code [] > (->Foo 1 2)) > > (defrecord Foo [x y]) > > If you need to do type checks check for a protocol instead. > > Timothy > > > On Thu, Apr 21, 2016 at 5:01 PM, Sean Corfield <se...@corfield.org > <javascript:>> wrote: > >> Pretty sure Michal Marczyk mentioned this in his Clojure/West talk last >> week: >> >> >> >> >> https://www.youtube.com/watch?v=vZtkqDIicqI&index=14&list=PLZdCLR02grLq4e8-1P2JNHBKUOLFTX3kb >> >> >> >> (I don’t remember exactly what he said was the workaround) >> >> >> >> Sean Corfield -- (904) 302-SEAN >> An Architect's View -- http://corfield.org/ >> >> "If you're not annoying somebody, you're not really alive." >> -- Margaret Atwood >> >> >> >> On 4/21/16, 2:05 PM, "JvJ" <clo...@googlegroups.com <javascript:> on >> behalf of kfjwh...@gmail.com <javascript:>> wrote: >> >> >> >> I'm working with two deftypes that I want to be able to references each >> other. (They're persistent and transient implementations of the same >> collection.) >> >> >> >> So far, it seems that the normal clojure.core/declare doesn't work in >> this case. Is there another way to do it? >> >> >> >> Thanks >> >> . >> >> -- >> You received this message because you are subscribed to the Google >> Groups "Clojure" group. >> To post to this group, send email to clo...@googlegroups.com >> <javascript:> >> Note that posts from new members are moderated - please be patient with >> your first post. >> To unsubscribe from this group, send email to >> clojure+u...@googlegroups.com <javascript:> >> For more options, visit this group at >> http://groups.google.com/group/clojure?hl=en >> --- >> You received this message because you are subscribed to the Google Groups >> "Clojure" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to clojure+u...@googlegroups.com <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > > > > -- > “One of the main causes of the fall of the Roman Empire was that–lacking > zero–they had no way to indicate successful termination of their C > programs.” > (Robert Firth) > -- 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 --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
