>From what I understand, the reader will call the tag function, thus being executed at read time and not compile time.
On Thursday, March 7, 2013 4:04:15 AM UTC-5, Akhil Wali wrote: > > IMHO features expressions should be evaluated at read-time only. > Putting it off till the compilation phase only complicates things. > So I'm actually favoring a preprocessing step like here - > http://dev.clojure.org/display/design/Feature+Expressions?focusedCommentId=6390066#comment-6390066 > > The idea is simple; when the reader parses a sexpr, and if there's a > feature expression,then only use the part that's relevant to the current > Clojure dialect. > The only complication with this scheme is that all information in > *clojure-version* is related to the version numbers only; however, this > could be changed easily. > > > > On Thu, Mar 7, 2013 at 7:46 AM, Brent Millare > <brent....@gmail.com<javascript:> > > wrote: > >> +1 >> >> Isn't is possible to accomplish all these efforts using tagged literals? >> https://github.com/miner/wilkins >> >> This way the facilities for read-time code generation can be customized >> and any reader that supports tagged-literals will support this. All of this >> is data provided as arguments, no evaluation. Evaluation happens from the >> tag function. >> >> On Wednesday, March 6, 2013 8:24:15 PM UTC-5, Brian Goslinga wrote: >>> >>> Do we really need new syntax for feature expressions? Although it would >>> be more ugly than CL's feature expressions, we could use a reader literal. >>> For example #feature [<feature expression> <value>]. Using a reader literal >>> is simple, compatible with EDN, and allows for the feature expressions to >>> be backported to an older version of Clojure using a library. >> >> -- >> -- >> You received this message because you are subscribed to the Google >> Groups "Clojure" group. >> To post to this group, send email to clo...@googlegroups.com<javascript:> >> Note that posts from new members are moderated - please be patient with >> your first post. >> To unsubscribe from this group, send email to >> clojure+u...@googlegroups.com <javascript:> >> 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+u...@googlegroups.com <javascript:>. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> >> > > > > -- > Akhil Wali > > # http://github.com/darth10 <https://github.com/darth10> > # http://darth10.github.com > > -- -- 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/groups/opt_out.
