Objects creating and passing objects to other objects?
Posted on 2001-06-13
I am developing a model in C++. One of the main sections of the model consists of two objects: nodes and packets.
My packet objects are really just glorified structures storing storing integer data.
The node class includes several public methods to manipulate it, as well as a private STL list member to store packets -- a buffer, if you will. Nodes can do several things. The two most important are: 1) storing packets given to it and 2) moving packets from itself to a given node. They do this using the following methods:
void add_packet(Packet p);
void move_packet(Node destination);
The add_packet method simply adds p to the end of the STL list contained in the node. It's the move_packet method that is giving me problems. Originally, I thought I could simply make a copy of packet I wanted to move, add it to the destination node (using add_packet, of course) and then delete the node from the starting list (the list contained in the object handling the message). However, this did not produce the desired results.
Looking into the bug I found that while I'm in the move_packet method, everything is fine -- the destination node contains what it's supposed to and at the proper time. However, as soon as I exit the method, the packet object disappears.
I've fooled around with several ways of getting around this, all to no avail. What am I missing? IOW, How do I move object A from object 1 to object 2?