Re: Deriving from concrete types
Kirit S?lensminde wrote:
Alan McKenney wrote:
On another note: some posters have indicated that
one should use "private" inheritance.
Now, I've never used private inheritance, but it
seems to me that if you derive privately from std::vector,
then all the std::vector functions are inaccessible
to the user of the class, which sort of defeats the
purpose.
Read up on the 'using' syntax.
class MyVector : private std::vector< int > {
public:
using operator [];
using resize;
// etc.
};
Now you can control exactly the members that you wish to include and
you cannot use a MyVector as a substitute for any std::vector< int >
either.
True.
But if you want all the std::vector<> member functions, how is this
better than just using public inheritance?
A disadvantage of putting in "using" declarations for every
std::vector function is that it's an opportunity for errors and
omissions.
-- Alan McKenney
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