On Feb 22, 2009, at 2:48 PM, Mark Volkmann wrote:
> > On Sun, Feb 22, 2009 at 1:40 PM, Chouser <chou...@gmail.com> wrote: >> >> On Sun, Feb 22, 2009 at 2:10 PM, Mark Volkmann >> <r.mark.volkm...@gmail.com> wrote: >>> >>> All the documentation I've seen on validators for reference types >>> says >>> they should throw an exception if the value is invalid. I've never >>> seen it explained that they should return true if the value is >>> valid. >>> That's seems to be the case though. Can someone confirm that? >> >> The docstrings for the reference types include this phrase: >> >> If the new state is unacceptable, the validate-fn should return >> false or throw an exception. >> >> So it seems you are correct about the return value. > > Cool! So you don't have to throw an exception at all! For example, a > validator to check that a value is an integer can be written like > this. > > (defn my-validator [value] (integer? value)) > > Actually, that means you can use predicate functions as validators, so > my function above isn't even needed. I can just use integer? as the > validator function. > > Exactly, the enhancement is for that scenario. Rich --~--~---------~--~----~------------~-------~--~----~ 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 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 -~----------~----~----~----~------~----~------~--~---
