Thanks! A great suggestion. I'll try it. On Friday, March 27, 2015 at 8:56:21 PM UTC-4, Ben wrote: > > One way you can get what you want is to give up on the auto-gensym feature > of the #-terminated identifiers, and call gensym directly, enabling it to > be mocked out with with-redefs. E.g. instead of: > > (defmacro m1 > [x f] > `(let [x# ~x] > (~f x#))) > > do > > (defmacro m1 [x f] > (let [x-sym (gensym)] > `(let [~x-sym ~x] (~f ~x-sym)))) > > You can then do something like > > (defn new-gensym [] > (let [counter (atom 0)] > (fn [& [extra]] (symbol (str (or extra "G_") (swap! counter inc)))))) > > (with-redefs [gensym (new-gensym)] (macroexpand-1 '(m1 1 inc))) > > (not tested) > > On Fri, Mar 27, 2015 at 5:50 PM, David James <david...@gmail.com > <javascript:>> wrote: > >> I agree with this motivation behind this request, which I explain in more >> detail here: >> http://stackoverflow.com/questions/16745135/how-to-test-a-clojure-macro-that-uses-gensyms >> >> We should be able to test the behavior *and* the macroexpansion. (Most >> things in life are not simple either/or decisions. Don't believe people >> that tell you otherwise.) >> >> On Monday, March 23, 2015 at 12:58:49 PM UTC-4, Chris Ford wrote: >>> >>> I think it's useful to think of macros as an odd form of I/O. Just as >>> you would separate out your templating from your domain functions, separate >>> out your defmacro from regular functions that just happen to manipulate >>> symbols. These functions will be easier to test. >>> >>> On 23 March 2015 at 16:23, Sean Corfield <se...@corfield.org> wrote: >>> >>>> On Mar 22, 2015, at 7:52 PM, myguidingstar <phuthuycuo...@gmail.com> >>>> wrote: >>>> > I wonder if there is any way to make macro expansion in Clojure >>>> deterministic. That would be useful in unit tests. >>>> >>>> I’d be very interested to understand your use case… Testing what the >>>> macro expands to seems like it is test the macro system itself, not your >>>> own code. Surely in a unit test you’d want to test the _behavior_ of the >>>> code instead? >>>> >>>> Sean Corfield -- (904) 302-SEAN >>>> An Architect's View -- http://corfield.org/ >>>> >>>> "Perfection is the enemy of the good." >>>> -- Gustave Flaubert, French realist novelist (1821-1880) >>>> >>>> >>>> >>>> -- >>>> 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 >>>> 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 >>>> 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. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> -- >> 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/d/optout. >> > > > > -- > Ben Wolfson > "Human kind has used its intelligence to vary the flavour of drinks, which > may be sweet, aromatic, fermented or spirit-based. ... Family and social > life also offer numerous other occasions to consume drinks for pleasure." > [Larousse, "Drink" entry] > >
-- 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/d/optout.
