On 20 March 2013 16:41, Marko Topolnik <marko.topol...@gmail.com> wrote:
> On Wednesday, March 20, 2013 4:34:32 PM UTC+1, James Reeves wrote: > >> >> If validation happens "all around", that implies there is no one function >> that can test whether a value of data is valid for a given data store. This >> strikes me as a somewhat shaky foundation for a system. >> > > The idea is that all validation functions share the same contract to call > the appropriate *add-failure* function that registers the validation > result. > I don't see why that would be necessary. Why not put all the validation logic in one place? > There may be instances where it makes sense to use exceptions as a >> control flow mechanism, but I wonder whether it wouldn't be better to use >> something like CPS in those instances. >> > > I can't picture how such a mechanism would work, and what benefit it would > bring over the exceptions mechanism. CPS in Clojure means trampolining, > which is quite an unwieldy, and I'd say "cheap" tack-on. A validating > function would then be supposed to return a common, globally-defined > "continuation", in fact just a simple function, that would redirect the > flow towards the validation failure-handling case. > I wasn't thinking of validation when I suggested CPS, because I don't see a need for any unusual control flow when validating data. - James -- -- 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.
