[Mono-list] VBNC in Mono.

Kornél Pál kornelpal at gmail.com
Tue Sep 12 18:57:24 EDT 2006


I didn't have a look at the docs, but when a type has no namespace or is in 
the global namespace (I don't know the which is the right term:) 
Type.Namespace returns null on Mono and MS.NET as well. It's quite easy to 
create a such type. An example is Consts.cs that is used in almost all class 
library assemblies. But that's a non-public type that didn't expose the bug 
in vbnc. Miguel however added a 
mcs/class/Managed.Windows.Forms/System.Windows.Forms/IDropTarget.cs class 
that is far from the expected version but it's a luck for us because it 
exposed this bug in vbnc.:)


----- Original Message ----- 
From: "Rolf Bjarne Kvinge" <rolfkvinge at ya.com>
To: "Kornél Pál" <kornelpal at gmail.com>; "Miguel de Icaza" 
<miguel at novell.com>
Cc: <mono-list at lists.ximian.com>; "Rafael Mizrahi" <rafim at mainsoft.com>
Sent: Wednesday, September 13, 2006 12:41 AM
Subject: Re: [Mono-list] VBNC in Mono.

> Hi Kornél,
> Regarding the bug in vbnc: how (and where) did you find a type with a null 
> namespace?
> According to MSDN this should not happen unless it is a generic type:
> http://msdn2.microsoft.com/en-us/library/system.type.namespace.aspx
> Anyway feel free to commit the patch ;)
> Rolf
>> Hi,
>> Use "VB.replace.bat 2" then try to bootstrap vbnc on MS.NET.
>> For an example have a look at the attached vbrun.diff.
>> The bug I found when trying to compile vbnc was:
>>                 Case TypeCode.Decimal
>>                     Return CDec(Value)
>> This results in a recursiong with Conversions.ToDecimal because CDec (and
>> all the other CType conversions are done at runtime unless the type is 
>> known
>> to the compiler as well. And anyway there is no use to do 
>> reinterpretation
>> when the exact type is know. A simple unbox is enough.
>> But there are other bugs (and I guess a lot of them) in VB runtime for 
>> sure.
>> And I found a bug in vbnc as well that was possible because of a bug in
>> System.Windows.Forms.:)
>> Kornél
>> ----- Original Message -----
>> From: "Miguel de Icaza" <miguel at novell.com>
>> To: "Kornél Pál" <kornelpal at gmail.com>
>> Cc: <mono-list at lists.ximian.com>
>> Sent: Wednesday, September 13, 2006 12:04 AM
>> Subject: Re: [Mono-list] VBNC in Mono.
>>> Hey!
>>>> But it's unable to bootstrap itself on MS.NET using our VB runtime so 
>>>> the
>>>> VB
>>>> runtime should be fixed as well before trying to fix vbnc on Mono.
>>> Do you have some details for me?
>>> This is a good observation, before we launch ourselves into a quest to
>>> fix bugs on the Mono side (although we already fixed a known problem)
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