[Mono-osx] PermFormSelectOnMainThread patch for monomac

kjpou kjpou at pt.lu
Tue May 24 05:11:35 EDT 2011

Hello Lee

You are absolutely correct about the assuming not-null but there is no 
way of knowing up front if a null value is valid or not unless you are 
very familiar with the wrapper code that is being written.

The automatic parser that Miguel wrote, which I think most people use, 
takes a header file and outputs automatically the interface wrapper for 
inclusion into the system.  Doing it by hand is very, very time 
consuming.  It is then necessary to tweek it by hand.   One of those 
tweeks is for [Null Allowed]  value which you have to add by hand for 
each parameter.


On 5/24/11 12:17 AM, Lee V. Andrus wrote:
> Most wrapper methods in MonoMac assume or require that all class parameters
> are not null--including many for which null is an acceptable (and sometimes
> necessary) value.
> Maxi Combina wrote:
>> ...
>> My selector does not take argument, so I use null as argument...
>> and InvokeOnMainThread() fails. If I change
>> monomac/src/Foundation/NSObject.cs:InvokeOnMainThread() to check for null,
>> it works.
>> So: could this small change be added? Or is it mandatory to pass a
>> non-null
>> paramter to InvokeOnMainThread()?
>> ...
> --
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