Re: Why can't pass vector of "Derived" to function that takes vector of "Base"?

On Apr 28, 5:05 pm, Rob <someidunknown1...@[EMAIL PROTECTED]
> wrote:
> I have these cl***** (elided methods):
>
> class Base
> {
> public:
>       Base(string name) {...}
>
> };
>
> class Derived : public Base
> {
> public:
>       Derived(String name) : Base( name ) {...}
>
> };
>
> And neither of these work:
>
>       /*** ATTEMPT ONE **/
>       void create(std::vector<Base>& arr)
>       {
>             ...
>       }
>
>       int main()
>       {
>            std::vector<Derived> arr;
>            create( arr );
>       }
>
>       /*** ATTEMPT TWO **/
>       void create(std::vector<Base*>& arr)
>       {
>             ...
>       }
>
>       int main()
>       {
>            std::vector<Derived*> arr;
>            create( arr );
>       }
>

Take a look at Bjarne Stroustrup's technical FAQ:

http://www.research.att.com/~bs/bs_faq2.html#conversion

- Anand


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