[IronPython] IronPython 2.7.1 & 3.x Development

Markus Schaber m.schaber at 3s-software.com
Thu Mar 17 01:04:12 PDT 2011


Hi, Thomas,

I did know about the assembly version being part of the name, but I did not know yet about the extern aliases. I'm learning something new every day...

Thanks a lot! 

Best regards

Markus Schaber

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> -----Ursprüngliche Nachricht-----
> Von: users-bounces at lists.ironpython.com [mailto:users-
> bounces at lists.ironpython.com] Im Auftrag von Tomas Matousek
> Gesendet: Mittwoch, 16. März 2011 17:41
> An: Discussion of IronPython
> Betreff: Re: [IronPython] IronPython 2.7.1 & 3.x Development
> 
> Yes, you can do it and w/o any glue - the version of the assembly is a
> part of the name, so the assemblies are in fact not named identically.
> Only the files are and they can be either in GAC or in a different
> subdirectory of your app. Your App.config can specify subdirectories used
> to look for assemblies [1].
> 
> To choose the namespace/class from one assembly or the other use extern
> aliases [2] in your code.
> 
> Tomas
> 
> [1] http://msdn.microsoft.com/en-us/library/823z9h8w(VS.80).aspx
> [2] http://www.davidarno.org/c-howtos/aliases-overcoming-name-conflicts-
> part-2-extern-alias/
> 
> 
> -----Original Message-----
> From: users-bounces at lists.ironpython.com [mailto:users-
> bounces at lists.ironpython.com] On Behalf Of Markus Schaber
> Sent: Wednesday, March 16, 2011 12:24 AM
> To: Discussion of IronPython
> Subject: Re: [IronPython] IronPython 2.7.1 & 3.x Development
> 
> Hi,
> 
> Von Tomas Matousek
> 
> >>> As I wrote, we host IronPython inside our application, so shebang
> and
> >>> file name suffixes are irrelevant - but we could use the shebang as
> a
> >>> marker for python 3 (given that we can host both versions
> >>> side-by-side) and parse the source manually to find out which
> version
> >>> to use - at least for a specific grace period.
> >>
> >> I think we can support this - it would be no different than using
> >> IronPython and IronRuby side by side, if we do it right. We'd
> probably
> >> have to rename IronPython.dll to IronPython3.dll as well, but that's
> not a
> >> big deal.
> > The assemblies are strongly named so I don't think that the name
> change
> > would be necessary.
> 
> Maybe we will need some tricks to solve the reference problems - I don't
> know whether you can reference two identically named assemblies containing
> identically named classes from the same C# dll, even if they are signed
> differently. But I think some kind of glue layer dlls could easily solve
> that.
> 
> Thanks,
> Markus
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> 
> 
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