C++ Problem

struct ITool{};

template<typename T>
struct ToolContainer : public ITool
{
    ITool *tool;
};

class Tool
{
    ITool *owner_class;
public:
    template<typename T>
    Tool(ToolContainer<T> *_owner_class) : owner_class(_owner_class){}
}

class ToolLine : public Tool
{
public:
    ToolLine() : Tool<ToolLine>(this) {}
}