Re: [boost] Re: How to cast type with vector

From: Victor A. Wagner Jr. (vawjr_at_[hidden])
Date: 2005-04-27 14:23:20

At Tuesday 2005-04-26 11:10, Philippe Mori wrote:

>>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 ).
>>zlf
>
>Since a Limousine is a Car, you should able to do
>
>    Cars.insert(Cars.end(), Limousines.begin(), Limousines.end());
>
>at least if you have a recent compiler.

the OP should note that doing this is going to "slice" each Limousine down 
to a Car.
IF the original intent (NOT stated) was to have a single vector which held 
both Cars and Limousines then some other approach would be  needed (such as 
a vector<Car*> or better, one of the smart pointers instead of the raw Car*).

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Victor A. Wagner Jr.      http://rudbek.com
The five most dangerous words in the English language:
               "There oughta be a law"