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Re: Toll-free bridge type at runtime
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Re: Toll-free bridge type at runtime


  • Subject: Re: Toll-free bridge type at runtime
  • From: Ryan Joseph <email@hidden>
  • Date: Fri, 3 Apr 2009 10:06:39 +0700


On Apr 3, 2009, at 9:59 AM, Mark Ritchie wrote:

On 2-Apr-09, at 10:38 PM, Ryan Joseph wrote:
I think I need explain what exactly I need this for. I'm making a Pascal bridge to Cocoa and it would be convenient if I could pass a CF type or a Pascal wrapper indiscriminately and decide at runtime how they should handled. If I knew the type was CF (thus NOT a wrapper, because it was created from a CoreFoundation function) I would not dereference the object and cause crashing.

Hi Ryan

Would the Pascal wrapper be a custom subclass of NSArray which has some specific functionality for the bridge? I'm trying to understand how this wrapped array would be different from another array. As Ali said, it would be better if you could avoid the test.

The wrapper is simply a Pascal object that encapsulates a Cocoa object. The underlying object is exactly the same as it appears in Cocoa, except it's accessed via Objective-C runtime functions. The fact it's a "wrapper" is really not important, I will be testing a CF type or the underlying Cocoa object.


I'm prepared to abandon this if it's going to dangerous, it would just be nice if users didn't have to choose manually. Thanks.


Thanks!
Mark
__
Mark Ritchie
Cocoa and WebObjects Developer
Diamond Lake Consulting Inc.
Toronto, Ontario, Canada




Regards, Josef

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  • Follow-Ups:
    • Re: Toll-free bridge type at runtime
      • From: Michael Ash <email@hidden>
References: 
 >Re: Toll-free bridge type at runtime (From: Greg Guerin <email@hidden>)
 >Re: Toll-free bridge type at runtime (From: Ali Ozer <email@hidden>)
 >Re: Toll-free bridge type at runtime (From: Ryan Joseph <email@hidden>)
 >Re: Toll-free bridge type at runtime (From: Mark Ritchie <email@hidden>)

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