This patch demonstrates the direction I was going to go with custom subject handling of attributes. It only handles the IBAction attribute, as that seemed like a simple place to start.
When attempting to deduce the diagnostic argument, I am looking through to the SubsetSubject's Base member. However, I suspect most attributes will use the custom diagnostic logic for this. I am only generating the custom checking code once, and reusing it as-needed. Also, I am not attempting to support SubsetSubjects within SubsetSubjects at this point. ~Aaron
SubsetSubject.patch
Description: Binary data
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