private static bool runCommand(ref ReferenceSet <Key> set, Key[] domain, Command cmd)
{
switch (cmd.type)
{
case CmdType.CREATE:
set = new ReferenceSet <Key>((int)cmd.arg);
break;
case CmdType.ADD:
return(set.add(domain[(int)cmd.arg]));
case CmdType.DEL:
return(set.delete(domain[(int)cmd.arg]));
case CmdType.CLEAR:
set.clear();
break;
case CmdType.UNION:
set.unionWith(makeSet(domain, (IEnumerable <int>)cmd.arg));
break;
case CmdType.INTERSECT:
set.intersectWith(makeSet(domain, (IEnumerable <int>)cmd.arg));
break;
}
return(true);
}
