Ironruby core - Apr 2009 - [IronPython] Telling .NET classes from Python objects

+1 for this question only I need it to implement different binding
strategies in IronMVC.

IronRuby in Action (http://manning.com/carrero)

Winston
Churchill<http://www.brainyquote.com/quotes/authors/w/winston_churchill.html>
- "The best argument against democracy is a five-minute conversation
with
the average voter."

On Tue, Apr 28, 2009 at 7:35 PM, Michael Foord <fuzzyman at
voidspace.org.uk>wrote:
> Hello guys,
>
> I''m continuing my work on generating pi files for the Wing IDE.
Actually
> everything I encounter will be a .NET type, but in general what is the best
> way of telling if an object is a .NET type or a Python type?
>
> Obviously for the primitives it is a moot point - but I''m talking
about
> user defined classes.
>
> Michael
>
> --
> http://www.ironpythoninaction.com/
> http://www.voidspace.org.uk/blog
>
>
> _______________________________________________
> Users mailing list
> Users at lists.ironpython.com
> http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
>
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Would you consider Bignum to be a .NET type or Ruby type?

Tomas

From: users-bounces at lists.ironpython.com [mailto:users-bounces at
lists.ironpython.com] On Behalf Of Dino Viehland
Sent: Tuesday, April 28, 2009 10:41 AM
To: Discussion of IronPython; ironruby-core
Subject: Re: [IronPython] Telling .NET classes from Python objects

Check to see if the object implements IPythonObject.

From: users-bounces at lists.ironpython.com [mailto:users-bounces at
lists.ironpython.com] On Behalf Of Ivan Porto Carrero
Sent: Tuesday, April 28, 2009 10:38 AM
To: Discussion of IronPython; ironruby-core
Subject: Re: [IronPython] Telling .NET classes from Python objects

+1 for this question only I need it to implement different binding strategies in
IronMVC.


IronRuby in Action (http://manning.com/carrero)

Winston
Churchill<http://www.brainyquote.com/quotes/authors/w/winston_churchill.html>
- "The best argument against democracy is a five-minute conversation with
the average voter."
On Tue, Apr 28, 2009 at 7:35 PM, Michael Foord <fuzzyman at
voidspace.org.uk<mailto:fuzzyman at voidspace.org.uk>> wrote:
Hello guys,

I''m continuing my work on generating pi files for the Wing IDE.
Actually everything I encounter will be a .NET type, but in general what is the
best way of telling if an object is a .NET type or a Python type?

Obviously for the primitives it is a moot point - but I''m talking about
user defined classes.

Michael

--
http://www.ironpythoninaction.com/
http://www.voidspace.org.uk/blog


_______________________________________________
Users mailing list
Users at lists.ironpython.com<mailto:Users at lists.ironpython.com>
http://lists.ironpython.com/listinfo.cgi/users-ironpython.com

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Class#to_clr_type? Returns nil for custom Ruby objects... depends on
what you''re looking for...

On Tue, Apr 28, 2009 at 1:38 PM, Ivan Porto Carrero <ivan at
flanders.co.nz> wrote:
> +1 for this question only I need it to implement different binding
> strategies in IronMVC.
>
> IronRuby in Action (http://manning.com/carrero)
>
> Winston Churchill ?- "The best argument against democracy is a
five-minute
> conversation with the average voter."
>
> On Tue, Apr 28, 2009 at 7:35 PM, Michael Foord <fuzzyman at
voidspace.org.uk>
> wrote:
>>
>> Hello guys,
>>
>> I''m continuing my work on generating pi files for the Wing
IDE. Actually
>> everything I encounter will be a .NET type, but in general what is the
best
>> way of telling if an object is a .NET type or a Python type?
>>
>> Obviously for the primitives it is a moot point - but I''m
talking about
>> user defined classes.
>>
>> Michael
>>
>> --
>> http://www.ironpythoninaction.com/
>> http://www.voidspace.org.uk/blog
>>
>>
>> _______________________________________________
>> Users mailing list
>> Users at lists.ironpython.com
>> http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
>
>
> _______________________________________________
> Ironruby-core mailing list
> Ironruby-core at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
>
>


-- 
Michael Letterle
IronRuby MVP
http://blog.prokrams.com

I would recommend not to rely on whether an object is Ruby object or .NET object
if possible. You might be surprised to get a COM object, a Python object, DLR
expand, etc. if you do so. Use rather respond_to?, include? to ask for specific
methods/protocols.

Tomas

-----Original Message-----
From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Michael Letterle
Sent: Tuesday, April 28, 2009 11:10 AM
To: ironruby-core at rubyforge.org
Subject: Re: [Ironruby-core] [IronPython] Telling .NET classes from Python
objects

Class#to_clr_type? Returns nil for custom Ruby objects... depends on
what you''re looking for...

On Tue, Apr 28, 2009 at 1:38 PM, Ivan Porto Carrero <ivan at
flanders.co.nz> wrote:
> +1 for this question only I need it to implement different binding
> strategies in IronMVC.
>
> IronRuby in Action (http://manning.com/carrero)
>
> Winston Churchill ?- "The best argument against democracy is a
five-minute
> conversation with the average voter."
>
> On Tue, Apr 28, 2009 at 7:35 PM, Michael Foord <fuzzyman at
voidspace.org.uk>
> wrote:
>>
>> Hello guys,
>>
>> I''m continuing my work on generating pi files for the Wing
IDE. Actually
>> everything I encounter will be a .NET type, but in general what is the
best
>> way of telling if an object is a .NET type or a Python type?
>>
>> Obviously for the primitives it is a moot point - but I''m
talking about
>> user defined classes.
>>
>> Michael
>>
>> --
>> http://www.ironpythoninaction.com/
>> http://www.voidspace.org.uk/blog
>>
>>
>> _______________________________________________
>> Users mailing list
>> Users at lists.ironpython.com
>> http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
>
>
> _______________________________________________
> Ironruby-core mailing list
> Ironruby-core at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
>
>


-- 
Michael Letterle
IronRuby MVP
http://blog.prokrams.com
_______________________________________________
Ironruby-core mailing list
Ironruby-core at rubyforge.org
http://rubyforge.org/mailman/listinfo/ironruby-core

Bignum I''d consider to be a primitive :)  but it would be a ruby type
I''m thinking about models / DTO''s etc.  It''s for a
databinding context where
you get a list of strings that then need to populate an object. And to pick
the right conversion mechanisms I need a different strategy for a DLR type
as for a CLR type.


On Tue, Apr 28, 2009 at 8:04 PM, Tomas Matousek <
Tomas.Matousek at microsoft.com> wrote:
>  Would you consider Bignum to be a .NET type or Ruby type?
>
>
>
> Tomas
>
>
>
> *From:* users-bounces at lists.ironpython.com [mailto:
> users-bounces at lists.ironpython.com] *On Behalf Of *Dino Viehland
> *Sent:* Tuesday, April 28, 2009 10:41 AM
> *To:* Discussion of IronPython; ironruby-core
> *Subject:* Re: [IronPython] Telling .NET classes from Python objects
>
>
>
> Check to see if the object implements IPythonObject.
>
>
>
> *From:* users-bounces at lists.ironpython.com [mailto:
> users-bounces at lists.ironpython.com] *On Behalf Of *Ivan Porto Carrero
> *Sent:* Tuesday, April 28, 2009 10:38 AM
> *To:* Discussion of IronPython; ironruby-core
> *Subject:* Re: [IronPython] Telling .NET classes from Python objects
>
>
>
> +1 for this question only I need it to implement different binding
> strategies in IronMVC.
>
>
>
>
> IronRuby in Action (http://manning.com/carrero)
>
> Winston
Churchill<http://www.brainyquote.com/quotes/authors/w/winston_churchill.html>
- "The best argument against democracy is a five-minute conversation with
> the average voter."
>
> On Tue, Apr 28, 2009 at 7:35 PM, Michael Foord <fuzzyman at
voidspace.org.uk>
> wrote:
>
> Hello guys,
>
> I''m continuing my work on generating pi files for the Wing IDE.
Actually
> everything I encounter will be a .NET type, but in general what is the best
> way of telling if an object is a .NET type or a Python type?
>
> Obviously for the primitives it is a moot point - but I''m talking
about
> user defined classes.
>
> Michael
>
> --
> http://www.ironpythoninaction.com/
> http://www.voidspace.org.uk/blog
>
>
> _______________________________________________
> Users mailing list
> Users at lists.ironpython.com
> http://lists.ironpython.com/listinfo.cgi/users-ironpython.com
>
>
>
> _______________________________________________
> Ironruby-core mailing list
> Ironruby-core at rubyforge.org
> http://rubyforge.org/mailman/listinfo/ironruby-core
>
>
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I''d probably pick IDynamicMetaObjectProvider as the signifier of a
dynamic type.  Ruby and Python types that don''t implement this
interface aren''t "as dynamic" as types that do -- even
built-in ones -- because they won''t support dynamic binding from other
languages.  And all user-defined types would implement it.

As a bonus, you can get a list of member names directly from the MetaObject
returned by the IDMOP using something like this:

var idmop = obj as IDynamicMetaObjectProvider;
if (idmop != null) {
    var expr = System.Linq.Expressions.Parameter(typeof(object)); // The DLR
version, not the LINQv1 version!
    var dmo = idmop.GetMetaObject(expr);
    IEnumerable<string> names = dmo.GetDynamicMemberNames();
}

You could then create simple binders and use CallSites directly to actually get
and set the data members yourself -- and the result should support any DLR
language and not just Python or Ruby.


Disclaimer: I haven''t tested this, but it should work -- it''s
the basis for C# interop in .NET 4.0, after all.

From: ironruby-core-bounces at rubyforge.org [mailto:ironruby-core-bounces at
rubyforge.org] On Behalf Of Ivan Porto Carrero
Sent: Tuesday, April 28, 2009 12:59 PM
To: ironruby-core at rubyforge.org
Subject: Re: [Ironruby-core] [IronPython] Telling .NET classes from Python
objects

Bignum I''d consider to be a primitive :)  but it would be a ruby type

I''m thinking about models / DTO''s etc.  It''s for a
databinding context where you get a list of strings that then need to populate
an object. And to pick the right conversion mechanisms I need a different
strategy for a DLR type as for a CLR type.


On Tue, Apr 28, 2009 at 8:04 PM, Tomas Matousek <Tomas.Matousek at
microsoft.com<mailto:Tomas.Matousek at microsoft.com>> wrote:

Would you consider Bignum to be a .NET type or Ruby type?



Tomas



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 Dino Viehland
Sent: Tuesday, April 28, 2009 10:41 AM

To: Discussion of IronPython; ironruby-core
Subject: Re: [IronPython] Telling .NET classes from Python objects



Check to see if the object implements IPythonObject.



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 Ivan Porto Carrero
Sent: Tuesday, April 28, 2009 10:38 AM
To: Discussion of IronPython; ironruby-core
Subject: Re: [IronPython] Telling .NET classes from Python objects



+1 for this question only I need it to implement different binding strategies in
IronMVC.



IronRuby in Action (http://manning.com/carrero)

Winston
Churchill<http://www.brainyquote.com/quotes/authors/w/winston_churchill.html>
- "The best argument against democracy is a five-minute conversation with
the average voter."

On Tue, Apr 28, 2009 at 7:35 PM, Michael Foord <fuzzyman at
voidspace.org.uk<mailto:fuzzyman at voidspace.org.uk>> wrote:

Hello guys,

I''m continuing my work on generating pi files for the Wing IDE.
Actually everything I encounter will be a .NET type, but in general what is the
best way of telling if an object is a .NET type or a Python type?

Obviously for the primitives it is a moot point - but I''m talking about
user defined classes.

Michael

--
http://www.ironpythoninaction.com/
http://www.voidspace.org.uk/blog


_______________________________________________
Users mailing list
Users at lists.ironpython.com<mailto:Users at lists.ironpython.com>
http://lists.ironpython.com/listinfo.cgi/users-ironpython.com



_______________________________________________
Ironruby-core mailing list
Ironruby-core at rubyforge.org<mailto:Ironruby-core at rubyforge.org>
http://rubyforge.org/mailman/listinfo/ironruby-core

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