[boost] How to cast type with vector

From: zlf (zlfcn_at_[hidden])
Date: 2005-04-26 11:49:06

Hi,
    I have to classes.

    class Car;
    class Limousine : public Car{
    ...
    };

    And two vector
    vector<Car> Cars;
    vector<Limousine> Limousines;

    I want to set vector Limousines's to vector Cars( Cars = Limousines ). 
One method is:

    vector<Limousine>::iterator pos;
    for ( pos = Limousines.begin() ; pos != Limousines.end() ; ++ pos ){
        Car car;
        car = static_cast <Car>(*pos);
        Cars.push_back ( car );
    }

    However, I think it is to clumsy :0 .Who can provide me with a easier 
method(e.g:using copy() or other std function).thx

zlf