Alex, what's your feeling about how a reify-like form and a deftype-like form that supported concrete class extension (as detailed in the other thread) would be received? If you think there might be interest I can start a proposal and possibly write the patch as well.
On 15 April 2014 14:32, Alex Miller <a...@puredanger.com> wrote: > It is a non-goal for gen-class (and reify, proxy, etc)to support the > construction of any possible Java class or to fully support every possible > Java feature. That said, particular extensions to existing features might > be useful in reasonable use cases. > > > On Monday, April 14, 2014 7:56:21 PM UTC-5, Colin Fleming wrote: > >> Well, I'm a bit torn on this one. On the one hand, I'd love to have >> something that meets my particular use case (of course!) which I wrote >> about here: https://groups.google.com/d/topic/clojure/MznBwxZt4cY/ >> discussion. I think that case can be met while still keeping the API >> fairly simple. But once you start down the path of being able to do >> everything that you can in Java (multiple constructors, classes or members >> with non-standard visibility, annotations etc) the API becomes much more >> complicated, and I'm not sure where the right trade-off is there. My gut >> feeling is that much more than an extend-type as discussed in that thread >> should probably be done in Java, but again, maybe I just want what I >> personally need! >> >> >> On 15 April 2014 02:31, Jon Seltzer <seltz...@gmail.com> wrote: >> >>> This is unfortunate. I certainly can write a Java class and I expected >>> that would be the answer. The question for me is whether, as a group, we >>> see any value in having a consistent interface with the JVM. One could >>> argue that Clojure does not need any of the interop features it already >>> has. In fact, one might argue that all interop should occur by invoking >>> pure Clojure from Java only but I hope most of us would agree that would >>> not a very satisfying outcome. The Clojure in Clojure work being done >>> gives me hope this is going to change. A Clojure compiler written in >>> Clojure would almost certainly need to be full (or more fully) featured. >>> >>> I like Stuart Sierra's quote (Twitter): "Using Java libraries is >>> idiomatic Clojure", and this is true for a lot of us using Clojure. >>> >>> jbs >>> >>> >>> On Monday, April 14, 2014 1:10:47 AM UTC-7, Colin Fleming wrote: >>> >>>> gen-class really isn't suitable for doing complicated interop like >>>> annotating fields. It's heavily oriented towards a single means of managing >>>> state, which is a single field generally containing an atom, which in turn >>>> contains your actual state in a map or similar. If you really need multiple >>>> fields you can use deftype/defrecord, but they come with different >>>> restrictions - no inheritance, don't require their namespace on class init >>>> which is required for many use cases where you might want field >>>> annotations. I'm also not sure if their fields can be annotated. >>>> >>>> In general when you start needing that level of interop, the easiest >>>> thing is just to write a Java class and call into Clojure from there as >>>> required. >>>> >>>> >>>> On 14 April 2014 14:28, Jon Seltzer <seltz...@gmail.com> wrote: >>>> >>>>> There are many Java APIs that expect client APIs to annotate fields >>>>> but Clojure does not support annotations on fields. Is there any plan to >>>>> add support? >>>>> >>>>> And one tangential question: Is there any consideration of adding >>>>> gen-class support for multiple fields instead of just one? >>>>> >>>>> jbs >>>>> >>>>> -- >>>>> 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 >>>>> >>>>> 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 >>>>> >>>>> 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. >>>>> >>>>> For more options, visit https://groups.google.com/d/optout. >>>>> >>>> >>>> -- >>> 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 >>> 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 >>> 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. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- > 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. > -- 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.
