Right, my question is why I can't do this:(with-open [rdr (reader file) writer (get-writer) foo (get-a-foo)] ...)
On Tue, May 12, 2009 at 12:51 PM, Emeka <emekami...@gmail.com> wrote: > (with-open [rdr (reader file)] > ...........) > So the vector you referred to is for binding and in imperative that means > assigning rdr to function (reader file). So now it is pretty obvious that > what you need is the variable, rdr, (in side the scope) and that's why > clojure takes only the first element of the vector.I guess that's logical. > > Emeka > > > > > > On Tue, May 12, 2009 at 4:30 PM, Andrew Wagner <wagner.and...@gmail.com>wrote: > >> I just saw this on the JavaWorld article (great article by the way: >> http://www.javaworld.com/javaworld/jw-05-2009/jw-05-clojure.html >> ) <http://www.javaworld.com/javaworld/jw-05-2009/jw-05-clojure.html> >> >> (defmacro with-open [bindings & body] >> `(let bindings >> (try >> @body >> (finally >> (.close (first bindings)))))) >> >> >> ...really? Is there some reason it only closes the first of the bindings >> vector? It's not at all uncommon (though i wouldn't call it common either) >> in C# to do: >> >> using ((IMyFoo foo = GetMyDisposableFoo()) >> >> (IMyBar bar = GetMyDisposableBar())){ >> >> ...blah blah blah >> >> } >> >> >> It seems like this idiom would be easy to implement in this macro. Or am I >> missing something? >> >> >> >> > > > > --~--~---------~--~----~------------~-------~--~----~ 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 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 -~----------~----~----~----~------~----~------~--~---
