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Arc: Switch case is in protected scope
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Arc: Switch case is in protected scope


  • Subject: Arc: Switch case is in protected scope
  • From: "Gerriet M. Denkmann" <email@hidden>
  • Date: Tue, 22 Oct 2013 14:41:10 +0700

Converting to Arc (Xcode 5.0).

This works fine without Arc (regardless whether TRIGGER_ERROR is defined or not):

NSMutableString *mus = [ NSMutableString string ];
NSString *word = @"abc";

switch( self.colourType )
{
	case colour_link:
		[ mus appendString: @"<a href=\"" ];
		#define 	TRIGGER_ERROR
		#ifdef 		TRIGGER_ERROR
		NSString *urlStr = [ word stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding ];
		[ mus appendString: urlStr ];
		#else	//	no_ERROR
		[ mus appendString: [ word stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding ] ];
		#endif	//	no_ERROR

		break;

	default:
		[ mus appendString: word ];
};

But with Arc, if TRIGGER_ERROR is defined, I get an error: "Switch case is in protected scope" with the further explanation: "Jump bypasses initialization of retaining variable".


Was the old (non-arc) code faulty (but the compiler did not notice this)?
Why is the arc-version (with TRIGGER_ERROR defined) wrong?

Gerriet.


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