[IronPython] Constructor overloading
Dino Viehland
dinov at exchange.microsoft.com
Wed Jul 5 18:39:29 CEST 2006
To do typeof you can do:
import clr
clr.GetClrType(pythonType)
and then you can do the GetConstructor call.
There have been some recent fixes which change the way overloading constructors works - you'll want to overload __new__ and not __init__. There was some potential for confusion here in beta 8 and earlier.
But the correct way to call it should be via new, so you should be able to do:
Class MySubClass(MyDotNetBaseClass):
def __new__(cls, arg):
return MyDotNetBaseClass.__new__(cls, arg)
and then to select overloads you should be able to do:
class MySubClass(MyDotNetBaseClass):
def __new__(cls, arg):
return MyDotNetBaseClass.__overloads__[Stream](cls, arg)
If that doesn't work for you w/ Beta 8 you might want to try downloading the latest bits and see if that fixes it for you.
-----Original Message-----
From: users-bounces at lists.ironpython.com [mailto:users-bounces at lists.ironpython.com] On Behalf Of Andrzej Krzywda
Sent: Wednesday, July 05, 2006 7:20 AM
To: Discussion of IronPython
Subject: [IronPython] Constructor overloading
Hello all,
We are trying to create a .Net type object which has several one-parameter constructors.
By default it does the wrong thing and we want to specify which constructor is called.
We tried:
Icon.__overloads__[Stream](myStream)
Icon.__init__.__new__.__overloads__[Stream](myStream)
but neither of these methods work. How can we do it?
We also attempted to work around the issue by using Reflection on the Icon class:
typeof(Icon).GetConstructor([Stream]).Invoke([myStream])
but we can't find the IronPython equivalent of typeof. Does it exist?
--
Andrzej Krzywda
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