[IronPython] IronPython Post 2.0 Roadmap

[Harry Pierson]

All of the many overloads of GetCustomAttributes (http://msdn.microsoft.com/en-us/library/system.attribute.getcustomattributes(VS.85).aspx) need some type of static type info (Type, MemberInfo, ParameterInfo). So supporting custom attributes would require some type of static class as Michael mentions below.



-----Original Message-----
From: users-bounces at lists.ironpython.com [mailto:users-bounces at lists.ironpython.com] On Behalf Of Michael Foord
Sent: Monday, July 21, 2008 12:48 PM
To: Discussion of IronPython
Subject: Re: [IronPython] IronPython Post 2.0 Roadmap

Keith J. Farmer wrote:
> Attributes can be applied to more than just types -- members,
> parameters, return values (as I recall), etc.

But those all presuppose a static type - right?

IronPython could generate a static class in the compile phase where .NET
attributes are used. Python decorator syntax could be used - class
decorators are now part of Python 2.6 and no-one would object to you
sneaking them into Python 2.5...

Parameter and return type attributes could still use a method decorator
to apply them.

Michael

>
> ------------------------------------------------------------------------
> *From:* users-bounces at lists.ironpython.com on behalf of Curt Hagenlocher
> *Sent:* Mon 7/21/2008 9:51 AM
> *To:* Discussion of IronPython
> *Subject:* Re: [IronPython] IronPython Post 2.0 Roadmap
>
> "Availability of a static type" not because IronPython would need to
> access one but because it would need to expose one.
>
>
> On Mon, Jul 21, 2008 at 9:44 AM, Keith J. Farmer <kfarmer at thuban.org
> <mailto:kfarmer at thuban.org>> wrote:
>
>     You can create your own attribute classes, for whatever markup.
>      Particularly since LINQ-to-*, where they often are used to
>     annotate data classes with strings, etc (not references to types).
>
>     In any event, why does "availability of a static type" enter into
>     this?  IP can access static types just as well as any other .NET
>     language (System.Math comes to mind).  The motivation in general
>     is to make IP a better producer for CLR types, rather than just a
>     consumer, and attributes are an increasingly important thing to
>     support.
>
>     As for expression trees and extension methods, those are to make
>     IP a better consumer of a very important API (LINQ and the
>     IQueryable stack from .NET 3.5).
>
>     To be honest, once those 3 features are available in IP, I think
>     it would be on par with the mainstream languages in being very
>     usable in an exclusive sense.
>
>     -----Original Message-----
>     From: users-bounces at lists.ironpython.com
>     <mailto:users-bounces at lists.ironpython.com>
>     [mailto:users-bounces at lists.ironpython.com
>     <mailto:users-bounces at lists.ironpython.com>] On Behalf Of Harry
>     Pierson
>     Sent: Sunday, July 20, 2008 11:14 PM
>     To: Discussion of IronPython
>     Subject: Re: [IronPython] IronPython Post 2.0 Roadmap
>
>     Can you give me some examples where you would use these? The
>     problem I see is that many scenarios (WCF contracts, XML
>     serialization just to name two) where people want to use a custom
>     attribute depends on the availability of a static type.
>
>     Harry
>
>     -----Original Message-----
>     From: users-bounces at lists.ironpython.com
>     <mailto:users-bounces at lists.ironpython.com>
>     [mailto:users-bounces at lists.ironpython.com
>     <mailto:users-bounces at lists.ironpython.com>] On Behalf Of Keith J.
>     Farmer
>     Sent: Saturday, July 19, 2008 8:13 PM
>     To: Discussion of IronPython
>     Subject: Re: [IronPython] IronPython Post 2.0 Roadmap
>
>     votes++
>
>     -----Original Message-----
>     From: users-bounces at lists.ironpython.com
>     <mailto:users-bounces at lists.ironpython.com>
>     [mailto:users-bounces at lists.ironpython.com
>     <mailto:users-bounces at lists.ironpython.com>] On Behalf Of Michael
>     Foord
>     Sent: Saturday, July 19, 2008 10:38 AM
>     To: Discussion of IronPython
>     Subject: Re: [IronPython] IronPython Post 2.0 Roadmap
>
>     Sanghyeon Seo wrote:
>     > 2008/7/20 Harry Pierson <Harry.Pierson at microsoft.com
>     <mailto:Harry.Pierson at microsoft.com>>:
>     >
>     >> Hosting features are all done via the DLR, so that's a separate
>     team. As for
>     >> "ability to interact with the rest of the .Net framework", can
>     you be more
>     >> specific about what you're looking for in that space? What
>     *isn't* IPy doing
>     >> that you want it to?
>     >>
>     >
>     > .NET attributes?
>     >
>     >
>     +1 :-)
>
>     Michael
>
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