Thanks Tassilo for the explanation - much appreciated! I have been searching the web and searching clojure text books for the last two hours trying to find the answer to this same question. Finally I stumbled onto this thread!
I realize that hiding the complexity of distinctions between fn / fn* and let / let* etc might make the documentation more accessible for some users, but for others (like me and presumably also Plínio) it makes it really hard to track down what is *really* going on. I wish this distinction was part of the formal documentation. Does anyone know of documentation anywhere that does include these kinds of distinction? Thanks, Mark. On Thursday, 6 March 2014 02:27:26 UTC+10:30, Tassilo Horn wrote: > > Plínio Balduino <pbal...@gmail.com <javascript:>> writes: > > Hi Plínio, > > > Clojure.org says fn and let are special forms, but using the macro > > sourceshows that both are macros calling fn* and let* respectivelly. > > > > So fn and let are "special special forms", or clojure.org is > > incorrect/outdated? > > Well, they are correct from a user's point of view. One never uses the > real special forms fn* and let*. > > > If fn and let are really special forms and not macros, could you > > explain why? > > fn and let (and also loop) are macros around the real special forms fn* > and let* (and loop*) that add support for destructuring. For example, > > (let [[a b] [1 2]] > (+ a b)) > > expands to > > (let* > [vec__8592 [1 2] > a (clojure.core/nth vec__8592 0 nil) > b (clojure.core/nth vec__8592 1 nil)] > (+ a b)) > > where the destructuring has been transformed to "normal" code already. > > Bye, > Tassilo > -- 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.
