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how to pass arguments by reference

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how to pass arguments by reference

Subject: how to pass arguments by reference
From: Nick Rogers <email@hidden>
Date: Wed, 10 Dec 2008 21:13:54 +0530

Hi,
I have the following in my .m file:


- (UInt32)traverseTreeStraightReturnedDirection:(int&)treeDirection
			  returnedTreeDepth:(int&)treeDepth
				returnedKey:(HPlusCatalogKey&)catKey
				 lookForKey:(HPlusCatalogKey)lastKey
{
// code here
}

But the error when compiling is "parse error before & token". Is passing by reference not allowed or is there any other syntax that I should follow?

Thanks,
Nick

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