operator= function not working?

[jojo212]

Hey guys,

I'm trying to do something very simple, which is to get a Platform object using a function

Platform retrieve(int n)

from a CTrainList object, which is like a linked list that holds Platforms.

Here's the code (which appears as a function in main):

void displayStations(CTrainLine rLine, CTrainLine bLine){
    Platform temp;
    for(int n = 1; n < rLine.getSize()+1; n++){
        temp = rLine.retrieve(n);
        cout << "Got platform " << n << endl;
    }
}

But it's giving me this error:

4: no match for 'operator=' in 'temp = CTrainLine::retrieve(int)(n)'
4: candidates are: Platform Platform::operator=(Platform&)

What's confusing me is that I DO have an operator= function that returns a Platform object:

Platform Platform::operator=(Platform &p2){
    Platform result(p2.getStation(),p2.getLine(),p2.getDirection());
    result.setTrain(p2.hasTrain());
    return result;    
}

Also, here's the retrieve function for reference:

Platform CTrainLine::retrieve(int pos){
    ListNode * curr = find(pos);
    return *(curr->data);   //data is a pointer to a platform.
}

Does anyone have any idea what it's not letting me retrieve this object? It seems very unusual.

Thank you very much!