Receiver type for instance message is a forward declaration
Receiver type for instance message is a forward declaration
- Subject: Receiver type for instance message is a forward declaration
- From: Carl Hoefs <email@hidden>
- Date: Fri, 06 May 2016 13:32:18 -0700
I'm building for iOS 9.3, and am using NSOperationQueue throughout. Once in a while, NSOperationQueue -addOperation: throws an exception. I guess this is a well-known bug going all the way back to 2008. I found Mike Ash's writeup on the issue, and have downloaded his replacement class, RAOperationQueue. However, it was written long ago for GC not ARC. I have one remaining problem in converting the code.
- (BOOL)_runOperationFromList: (RAAtomicListRef *)listPtr sourceList: (RAAtomicListRef *)sourceListPtr
{
RAOperation *op = [self _popOperation: listPtr];
if( !op )
{
*listPtr = RAAtomicListSteal( sourceListPtr );
// source lists are in LIFO order, but we want to execute operations in the order they were enqueued
// so we reverse the list before we do anything with it
RAAtomicListReverse( listPtr );
op = [self _popOperation: listPtr];
}
if( op )
[op run]; <-- ERROR HERE
return op != nil;
}
The error I'm getting is: Receiver type 'RAOperation' for instance message is a forward declaration.
What does this error mean, and how can I fix it?
-Carl
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