[Mono-dev] [Mono-patches] r52427 - trunk/mcs/mbas

[Eyal Alaluf]

Hi, Rafael.

Can you point me to this test case location? It seems like an issue we haven't sen before
as well in Grasshoper.

Thanks, Eyal.

On Tue, 1 Nov 2005, Rafael Teixeira wrote:

> Date: Tue, 1 Nov 2005 11:55:08 -0200
> From: Rafael Teixeira <monoman at gmail.com>
> To: Miguel de Icaza <miguel at novell.com>
> Cc: mono-devel-list at ximian.com, alexandremarcondes at gmx.net,
>     maverson at gmail.com, Gonzalo Paniagua Javier <gonzalo at ximian.com>
> Subject: Re: [Mono-dev] [Mono-patches] r52427 - trunk/mcs/mbas
> 
> Well this is what vbc generates either way:
>
>        .locals init (
>                valuetype ExpressionLiteralsNothing/MyStruct    V_0)
>        IL_0000:  ldnull
>        IL_0001:  dup
>        IL_0002:  brtrue.s IL_0014
>
>        IL_0004:  pop
>        IL_0005:  ldtoken ExpressionLiteralsNothing/MyStruct
>        IL_000a:  call class [mscorlib]System.Type class
> [mscorlib]System.Type::GetTypeFromHandle(valuetype
> [mscorlib]System.RuntimeTypeHandle)
>        IL_000f:  call object class
> [mscorlib]System.Activator::CreateInstance(class
> [mscorlib]System.Type)
>        IL_0014:  unbox ExpressionLiteralsNothing/MyStruct
>        IL_0019:  ldobj ExpressionLiteralsNothing/MyStruct
>        IL_001e:  stloc.0
>
> So the struct is "synthesized" from a null (very non-c#) either way
> (regarding Option Strict). :)
>
> OK?
>
>
> On 11/1/05, Rafael Teixeira <monoman at gmail.com> wrote:
>> Hi Miguel,
>>
>> The team is already working on it, but there is a test written by
>> Ritvik (ExpressionLiteralNothingB.vb) that shows this behaviour is
>> consistent with what vbc does.
>>
>> I've told Maverson just to explore further to make sure if this
>> behaviour is affected by Option Strict On (the default, as in the test
>> source where the directive is omitted, is Off).
>>
>> Regards,
>>
>> On 10/31/05, Miguel de Icaza <miguel at novell.com> wrote:
>>> Hello,
>>>
>>>     The code in that revision for UnboxCast looks suspiciously wrong.
>>> It creates an empty object if child expression leaves a null on the
>>> stack.
>>>
>>>     Also, it would be convenient if you added a test case that showed
>>> this problem.
>>> --
>>> Miguel de Icaza <miguel at novell.com>
>>> Novell, Inc.
>>> _______________________________________________
>>> Mono-devel-list mailing list
>>> Mono-devel-list at lists.ximian.com
>>> http://lists.ximian.com/mailman/listinfo/mono-devel-list
>>>
>>
>>
>> --
>> Rafael "Monoman" Teixeira
>> ---------------------------------------
>> I'm trying to become a "Rosh Gadol" before my own eyes.
>> See http://www.joelonsoftware.com/items/2004/12/06.html for enlightment.
>> It hurts!
>>
>
>
> --
> Rafael "Monoman" Teixeira
> ---------------------------------------
> I'm trying to become a "Rosh Gadol" before my own eyes.
> See http://www.joelonsoftware.com/items/2004/12/06.html for enlightment.
> It hurts!
> _______________________________________________
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>