Hi, On Feb 16, 11:26 pm, Garth Sheldon-Coulson <g...@mit.edu> wrote:
> The reason I'm asking which Java classes can hold Clojure expressions is > --context snipped--- > list. Ok. I understand your problem. You have maction - a mix between macro and function - and you are not sure when to evaluate something unquoted (function behaviour) and when not (macro behaviour). You problem arises because you want to allow something like this (silly example): (def x '(Apply Plus [1 2])) (Apply Plus ~x) I suppose, the Apply call is contained in some wrapper macro? (mathematica (Apply Plus ~x))? You could provide a mathematica* function which does the work. Then the user can choose: (def x '(Apply Plus [1 29]) (def y (list 1 2)) (mathematica (Apply Plus ~(mathematica* x) ~y)) > What I think I've decided on is something like the following: > > (def x '(1 2)) > > ;in Clojuratica: > (Apply Plus ~x) ; unquotes x as an expression: 1 is a function, 2 is the > argument > > (Apply Plus ~~x) ; unquotes x as data: treats x as the list (1 2) > > or something along those lines. I have to try to make it congruent with > Clojure's quoting and unquoting conventions. This hijacks a little bit the unquoting. I don't know in how far this will be of relevance, but if you use something like this in a macro, you might run into trouble because suddenly the unquoting doesn't match anymore. However this is only a rather fuzzy fear. You should do some tests. Basically it's the same idea as I proposed above: let the user specify what he wants. > Thanks for your input. Your criticism of my premises made me rethink my > approach in a very constructive way. You are welcome. :) Sincerely Meikel -- 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
