C++ Overridden method not getting called

Question

Shape.h

namespace Graphics {
    class Shape {
    public:
        virtual void Render(Point point) {};
    };
}

Rect.h

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Answer 1

No, it is not casting.

You can instead store a reference to baseclass Point:

struct ShapePointPair {
        Shape shape;
        Point &location;
};

This reference must be set at construction time for struct ShapePointPair. Add a constructor to ShapePointPair for this purpose. It must be passed (newly created) instances of Rect.

Also observe the memory management responsiblities (proper written destructors, etc.).