This is confusing. First, if you read the docs, they begin with: --------------------------------- (Classname. args*) (new Classname args*) Special form. ---------------------------------
Only if you read further do you discover that (Classname. args*) is not a special form but a macro. Also, it is a macro that cannot be written in Clojure, that is, a "special macroexpansion" per the docs. So a special macroexpansion is reader-macro-like, in that it involves a special syntax rules not available to normal Clojure code, but macro- like in that it expands at macroexpansion time. Is that right? Stuart > On Dec 16, 2:32 pm, Stuart Halloway <stuart.hallo...@gmail.com> wrote: >> Hi Randall, >> >> The syntactic sugar forms are reader behavior, and occur too soon: at >> read time, not macro expansion time. >> > > Actually, the dot sugar is not reader magic, but macroexpansion, as > documented here: > > http://clojure.org/java_interop > > (read-string "(java.util.ArrayList.)") > -> (java.util.ArrayList.) ;a list with one symbol > > (macroexpand (read-string "(java.util.ArrayList.)")) > -> (new java.util.ArrayList) > > (eval (read-string "(java.util.ArrayList.)")) > -> #=(java.util.ArrayList. []) > >> Macros need to expand to real forms, not reader shortcuts. >> > > That's generally true, but does not apply here, because Classname. is > a regular symbol reader-wise. > > 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 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 -~----------~----~----~----~------~----~------~--~---
