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. So it's just the website that needs to be updated. -- R. Mark Volkmann Object Computing, Inc. --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
