[IronPython] Operator resolution with implicit conversion

[Jeffrey Sax]

Given the following C# code:

public class A { 
   public static A operator+(A a1, A a2) { return null; }
   public static implicit operator A(int n) { return null; }
}
public class B : A {}

In C#, I can then write:

B b = new B();
A c = b + 1;

However, in IronPython I get:

>>> b = B()
>>> c = b + 1
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: unsupported operand type(s) for +: 'B' and 'int'

Is there a general policy regarding this kind of .NET interop?

Thanks,

Jeffrey