ObjFW  Diff

	void *pool = objc_autoreleasePoolPush();
	id ret = [[[self objectEnumerator] nextObject] retain];
	objc_autoreleasePoolPop(pool);
	return [ret autorelease];
}

#ifdef OF_HAVE_BLOCKS
- (void)enumerateObjectsUsingBlock: (of_set_enumeration_block_t)block
- (void)enumerateObjectsUsingBlock: (OFSetEnumerationBlock)block
{
	bool stop = false;

	for (id object in self) {
		block(object, &stop);

		if (stop)
			break;
	}
}

- (OFSet *)filteredSetUsingBlock: (of_set_filter_block_t)block
- (OFSet *)filteredSetUsingBlock: (OFSetFilterBlock)block
{
	OFMutableSet *ret = [OFMutableSet set];

	[self enumerateObjectsUsingBlock: ^ (id object, bool *stop) {
		if (block(object))
			[ret addObject: object];
	}];