You can write a protocol, then extend it: (defprotocol IBufferLength (buffer-length [this]))
(extend-protocol IBufferLength (Class/forName "[B") (buffer-length [this] ...) ByteBuffer (buffer-length [this] ...)) On Fri, Jul 1, 2016 at 9:15 AM, Erik Assum <e...@assum.net> wrote: > A multimethod which dispatches on type, or maybe extend the counted(?) > protocol to these two types? > > Erik. > -- > i farta > > > Den 1. jul. 2016 kl. 17.12 skrev lvh <_...@lvh.io>: > > > > Hi, > > > > > > I have some code that wants to know the appropriate length of a byte > buffer. These can be byte arrays (as in [B) or java.nio.ByteBuffers. For > the former, I can call (alength ^bytes buf), for the latter I call > (.remaining ^ByteBuffer buf). Is there a way to just write a fn or macro > that picks the right one at compile time? I wrote some simple test fns, but > there doesn’t appear to be a way to access that type hinting information. > > > > > > thanks > > lvh > > > > -- > > 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. > -- “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.
