Re: Diamond Inheritance and STL

HGallon@teranews.com wrote:


<snip>

Dear All

Thanks for everyone's help. It is now clear to me that my design, rather
than any facet of virtual inheritance was at fault. A lot of code was
omitted from the sample code I provided, which may have hidden vital
details.

For what it is worth, my solution involved separating the image from the
element classes, and virtually inheriting a GetImage () function. I have
also separated the movement rules into a separate class so that I now have

class movingElement : public element, public movementRules
{
};

class animatedElement : public element
{
};

class movingAnimatedElement : public animatedElement, public movementRules
{
};

Instead of adding elements to the sorted list, I could then use:

class imageList
{
private:
     std::list<image*> m_list; // all right, std::vector if you want

public:
     void addImage (element& el);
};

void imageList::addImage (element& el)
{
     image& img = element.getImage ();
     // sort and list insertion code omitted
}