That behavior seems like a bug to me. Do you know whether there's some good (or stated, good or bad) reason for it?
http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/7-b147/sun/reflect/UnsafeBooleanFieldAccessorImpl.java On Oct 9, 2013 4:33 PM, "Pablo Nussembaum" <bau...@gmail.com> wrote: > Thanks for the help and clarifications. > My problem is that I'm working on a tool, as a part of my thesis, to > randomly execute annotated java classes to try discover its behavior. > So if a class has a (b|B)oolean field and I read its value using > reflection it returns (using Field.get()) a Boolean that for clojure will > be always false. > > In order to solve this issue I created the follow fn: > > (defn- get-val > [^java.lang.reflect.Field f instance] > (let [value (.get f instance)] > (if (instance? java.lang.Boolean value) > (boolean value) > value))) > > Thanks and regards, > -- > Bauna > > > On 10/06/2013 10:57 PM, Andy Fingerhut wrote: > > There is also this page on ClojureDocs that might shed some light on this > quirk: > > http://clojuredocs.org/clojure_core/clojure.core/if > > > On Sun, Oct 6, 2013 at 6:14 PM, Rob Browning <r...@defaultvalue.org> wrote: > >> Gary Trakhman <gary.trakh...@gmail.com> writes: >> >> > Clojure's false and true are Boolean/FALSE and Boolean/TRUE, and for >> speed >> > reasons (I think) anything that checks for truthiness uses java's ==, >> which >> > will fail on any new Boolean object. Usually, this isn't a problem, but >> > sometimes it is. You can see that this assumption is pervasive by >> looking >> > at the implementations of 'true?' and 'false?', which use identical? and >> > the check for != Boolean.FALSE in >> > >> https://github.com/clojure/clojure/blob/master/src/jvm/clojure/lang/Compiler.java#L2569 >> >> ...and further, my understanding is that the Boolean constructors are >> more or less considered a mistake, and you should effectively never >> use them. For example: >> >> http://rayfd.me/2007/01/17/the-evil-boolean-constructors/ >> >> Hope this helps >> -- >> Rob Browning >> rlb @defaultvalue.org and @debian.org >> GPG as of 2011-07-10 E6A9 DA3C C9FD 1FF8 C676 D2C4 C0F0 39E9 ED1B 597A >> GPG as of 2002-11-03 14DD 432F AE39 534D B592 F9A0 25C8 D377 8C7E 73A4 >> >> -- >> -- >> 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. >> > > -- > -- > 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. > > > -- > -- > 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. > -- -- 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.
