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.mill...@gmail.com>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 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. > > > -- 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.
