[MacRuby-devel] Conforming to a protocol

[Eloy Duran]

Can you provide a simple failing example?

On Nov 17, 2010, at 9:26 AM, Martijn Walraven wrote:

> I actually tried this, but the problem seems to be that Protocol is not a true class. So if I try to do anything with the protocol parameter from MacRuby, I get an error:
> 
> *** NSInvocation: warning: object 0x7fff71192488 of class 'Protocol' does not implement methodSignatureForSelector: -- trouble ahead
> *** NSInvocation: warning: object 0x7fff71192488 of class 'Protocol' does not implement doesNotRecognizeSelector: -- abort
> 
> Even just comparing it to another protocol object using protocol == Protocol.protocolWithName('...') leads to the same result.
> 
> Any ideas as to how this could be made to work?
> 
> On Nov 16, 2010, at 19:59 , Eloy Duran wrote:
> 
>> I don't have an example of a class that uses conformsToProtocol: on the delegate, so I can't give you a code example, but I would try to override the conformsToProtocol: class and instance methods and return true for those you support.
>> 
>> On 15 nov 2010, at 00:15, Martijn Walraven wrote:
>> 
>>> Hi,
>>> 
>>> I was wondering if there is any way to formally indicate a MacRuby class conforms to an Objective-C protocol. I encountered some code that uses conformsToProtocol: instead of respondsToSelector: as a check before invoking delegate methods, and the only way I could get a delegate written in MacRuby to work was to create an Objective-C class with the same name and specify the required protocols in the interface declaration there.
>>> 
>>> Thanks,
>>> 
>>> Martijn
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>> 
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