Making clojure.lang.IDeref a protocol
Hey, Has there been discussion about making clojure.lang.IDeref a protocol? I'd like to extend some java types to this the IDeref interface but currently this is not possible. I feel like this is such a common idiom, to get values, and doing so will allow me to leverage the @ reader macro for many data types. Best, Brent -- 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
Re: Making clojure.lang.IDeref a protocol
Hey, Has there been discussion about making clojure.lang.IDeref a protocol? I'd like to extend some java types to this the IDeref interface but currently this is not possible. I feel like this is such a common idiom, to get values, and doing so will allow me to leverage the @ reader macro for many data types. Best, Brent Someday. The challenge is load order. A lot would have to change to make protocols available early enough in Clojure's bootstrap to allow this. That said, I don't know many Java classes that have value-yielding semantics. And if you are writing your own class, you can implement the IDeref interface. Stu Stuart Halloway Clojure/core http://clojure.com -- 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
Re: Making clojure.lang.IDeref a protocol
On Thu, Aug 25, 2011 at 11:40 AM, Stuart Halloway stuart.hallo...@gmail.com wrote: Has there been discussion about making clojure.lang.IDeref a protocol? Someday. The challenge is load order. A lot would have to change to make protocols available early enough in Clojure's bootstrap to allow this. Thinking outside of the box, what about exposing a low level ability to define a Java interface separately somewhere, then erect the rest of the machinery of a protocol around it later? Then IDeref can be just an interface early in bootstrap, but be protocolized late in bootstrap and available in protocol form thereafter. (This could also be applicable to potentially-more-useful interfaces like IFn, ISeq, and Associative, too.) -- Protege: What is this seething mass of parentheses?! Master: Your father's Lisp REPL. This is the language of a true hacker. Not as clumsy or random as C++; a language for a more civilized age. -- 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
Re: Making clojure.lang.IDeref a protocol
That said, I don't know many Java classes that have value-yielding semantics. And if you are writing your own class, you can implement the IDeref interface. There aren't many value-yielding semantics from many java classes, but the ones I care about, do matter. Also, in my case, I'm adding value- yielding semantics to classes that didn't originally have such things. I'm not writing my own new java class. If I were writing something that I wanted to extend to an interface, making types with defrecord and deftype do that nicely for me. -- 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
