[IronPython] Trouble calling a method on a .NET object

Orian, Helmut helmut.orian at schema.de
Thu Jun 12 00:54:58 PDT 2008


hi again,
 

this was just a repro. I can not change the visibility of the "Concrete"
class. The interface
and the "Base" class are the public API of this assembly. I will file a
bug on codeplex.


Thanks and keep up the great work,
Helmut


________________________________

Von: users-bounces at lists.ironpython.com
[mailto:users-bounces at lists.ironpython.com] Im Auftrag von Curt
Hagenlocher
Gesendet: Mittwoch, 11. Juni 2008 18:35
An: Discussion of IronPython
Betreff: Re: [IronPython] Trouble calling a method on a .NET object


Your code works as expected if you make the "Concrete" class public
instead of internal. Please file this as an issue on CodePlex at
http://www.codeplex.com/IronPython
 

On Wed, Jun 11, 2008 at 6:09 AM, Orian, Helmut <helmut.orian at schema.de>
wrote:


	I'm having trouble calling a method on one of my .NET objects.
	
	if you compile the following repro into a "test.dll":
	
	
	namespace Test {
	       public interface ISomeInterface {
	               string Greet();
	       }
	
	       public abstract class Base {}
	
	       public static class SomeFactory {
	               public static object Get() {
	                       return new Concrete();
	               }
	       }
	
	       internal class Concrete : Base, ISomeInterface {
	               public string Greet() {
	                       return "Hello world!";
	               }
	       }
	}
	
	
	and try to use them:
	
	>>> import clr
	>>> clr.AddReference("test")
	>>> from Test import *
	>>> o = SomeFactory.Get()
	>>> print("Greet" in dir(o))
	True
	>>> print(o.Greet())
	
	Traceback (most recent call last):
	 File "<stdin>", line 1, in <module>
	TypeError: expected ISomeInterface, got Base
	
	
	To me it looks like a bug regarding collection of polymorphic
	information on .NET types;
	or am I missing something?
	
	
	Thanks,
	Helmut
	
	
	
	
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