As a nice result of this, you can easily see what the problem is simply by quoting the form: this resolves reader macros but leaves the form otherwise unevaluated, so you can determine what forms the -> macro is working with:
user> '(-> x #(inc %)) (-> x (fn* [p1__4781#] (inc p1__4781#))) user> (macroexpand '(-> x #(inc %))) (fn* x [p1__4788#] (inc p1__4788#)) On Nov 3, 5:52 am, Laurent PETIT <laurent.pe...@gmail.com> wrote: > 2011/11/2 Stefan Kamphausen <ska2...@googlemail.com>: > > > Hi, > > > while all the other answers already offered explanations and solutions I > > feel like I should add, that macros like -> and ->> work on the > > source-code. > > Not quite. Macros work on Clojure data structures returned by the > Clojure Reader (so reader-macros have already done their job at this > point). > > > > > > > > > So using -> does not mean 'pass the first thing as an argument > > to the function call in the second thing', it means 'take the first thing > > and rearrange my source-code so that the second thing becomes a list with > > the first thing in the second position'. And all this is done before > > compiling. > > > Hope that helps. > > > Kind regards, > > Stefan > > > -- > > 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 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
