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 ? Best regards Markus Schaber CODESYS® a trademark of 3S-Smart Software Solutions GmbH Inspiring Automation Solutions 3S-Smart Software Solutions GmbH Dipl.-Inf. Markus Schaber | Product Development Core Technology Memminger Str. 151 | 87439 Kempten | Germany Tel. +49-831-54031-979 | Fax +49-831-54031-50 E-Mail: m.scha...@codesys.com | Web: http://www.codesys.com | CODESYS store: http://store.codesys.com CODESYS forum: http://forum.codesys.com Managing Directors: Dipl.Inf. Dieter Hess, Dipl.Inf. Manfred Werner | Trade register: Kempten HRB 6186 | Tax ID No.: DE 167014915 This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorised copying, disclosure or distribution of the material in this e-mail is strictly forbidden. _______________________________________________ Ironpython-users mailing list Ironpython-users@python.org https://mail.python.org/mailman/listinfo/ironpython-users
