On Fri, Aug 7, 2015 at 12:47 AM, Markus Schaber <m.scha...@codesys.com> wrote: > Hi, Jeff, > > Von: Jeff Hardy [mailto:jdha...@gmail.com] >> On Thu, Jul 9, 2015 at 11:50 PM, Markus Schaber >> <m.scha...@codesys.com> wrote: >> > Hi, Ivan, >> > >> > Von: Ivan Pozdeev [mailto:v...@mail.mipt.ru] >> > >> >> > As far as I can see, the "in" operator should return true if any >> >> > object in the enumerable is "equal" to the object given as >> >> >reference: >> >> >> >> Indeed, >> >> https://docs.python.org/2/reference/expressions.html#membership-test-details >> >> states: >> >> >> >> For the list and tuple types, x in y is true if and only if there >> >> exists an index i such that x == y[i] is true. >> >> >> >> Now, to check if IronPython honors this. >> >> >> >> > assert a in (a,), 'a is in (a,)' >> >> > assert a in (b,), 'a is in (b,)' # this one fails... >> >> >> >> > As far as I can see via breakpoints, the Equals methods of the >> >> > objects are never actually called, except on the first assertion >> >> > with the == operator. >> >> >> >> My guess is it's cutting corners by comparing hashes instead. >> > >> > Hm, the GetHashCode() method in my example is hardcoded to return >> > 0, and it is not even called (at least, the breakpoint is not hit. >> > >> > There must be something more subtle... >> >> In theory it should be creating a dynamic call site for "equals" that >> will handle all of the cases (except for types that have a >> __contains__ method) including IDMOP. Which there could very likely >> be a bug in how that is generated; I'm not sure the IDMOP is stuff >> gets excersized as much as it should. > > What to do now? > > Should I file a bug report on https://github.com/IronLanguages/main/issues ?
That's probably the best bet, with as minimal a reproduction as possible. These code generation bugs are the hardest to deal with because I have to page everything involved back into my brain, and it's an absolute knot of code to sort through. So, no promises that I'll get to it anytime soon. :( - Jeff _______________________________________________ Ironpython-users mailing list Ironpython-users@python.org https://mail.python.org/mailman/listinfo/ironpython-users
