C++: Can I cast a vector to a vector <base_class> during a function call?

Question

I have a existed class and function which look like this:

Class base_class{
    ...
}

void Func(...,vector &vec_b,...){
    // inside          


        

Answer 1

No, you cannot convert between vectors of different types. However, you can achieve what you're trying to do by making Func a template. It probably won't require you to change any code in the actual function body, but it depends on what you're doing.

template
void Func(..., vector &vec_b, ...){
    // inside the function, the vector vec_b is being re-organized and re-sized
}