Would it be possible to create an implementation of delay and lazy-seq that didn't use fn to delay evaluation, or atleast captured dynamic variables?
(delay (+ x 3)) reasonable semantics in current clojure (let [x x] (delay (+ x 3))) (delay (fn [y] (+ x y))) semantics should be the same it already is (x should get it's value from the dynamic binding) (delay [x (fn [y] (+ x y))]) semantics should be (let [G_N x] (delay [G_N (fn [y] (+ x y))])), so all captured variables would need renaming using gensyms. delay would need it's body macroexpanded code to be able to correctly capture variables. It would also try to capture local variables, but that wouldn't change the semantics and would probably be optimized away by the compiler. I might have missed some important detail, since dynamic binding and lazyness have such a peculiar semantics interaction, but it would yield much more reasoanable execution, wouldn't it? -- 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
