On Sat, Jan 2, 2010 at 6:23 AM, Konrad Hinsen <konrad.hin...@fastmail.net> wrote: > On 01.01.2010, at 23:56, Hugo Duncan wrote: > >>> I want to create a new instance of a deftype from inside one of its >>> methods. >> >> I ended-up using extend-type for this case. > > That's probably the cleanest solution, but you lose the performance > benefit of defining methods right in the type definition. > > After looking at the deftype code, I came up with the following > solution: > > (defprotocol Foo > (foo [x])) > > (deftype Bar > [i] > Foo > (foo [] (new Bar (inc i)))) > > (foo (Bar 0)) > > > Its drawback is relying on an undocumented feature: the value of Foo > inside the methods is the class Foo being defined. >
That's documented: ;from (doc deftype) "In the method bodies, the (unqualified) name can be used to name the class (for calls to new, instance? etc)." Rich -- 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
