C++程序设计语言第十二章 “图形系统设计”中的intersect（Shape*Shape*)多重指派虚机制 VC6提示include/xtree出错，怎么处理

C++程序设计语言第十二章 “图形系统设计”中的intersect（Shape*,Shape*)多重指派虚机制 VC6提示include/xtree出错，怎么办

这个图形库设计是《C++程序设计语言 特别版》第十二章的习题12.2，之后在习题12.10中要求读者编写一个多重指派的虚机制来实现intersect(Shape*,Shape*)碰撞检测函数（如图，并不需要编写实际的检测代码，只需要保证能运行正确的函数）。我自己设计了一个比较合理的实现方法，用map容器保存Shape的typeinfo运行时类型信息，然后绑定到一个碰撞检测函数上。运行时从Map中找出对应检测函数。以下是具体实现：

C/C++ code

    typedef std::pair<const std::type_info*,const std::type_info*> TwoTypes;
    typedef bool (*Intersector)(Shape*,Shape*);
    struct TwoTypesOrder{
        bool operator()(const TwoTypes& lhs,const TwoTypes& rhs)
        {
            if(lhs.first->before(*rhs.first))
                return true;
            else if(*lhs.first==*rhs.first)
                return lhs.second->before(*rhs.second);
            else
                return false;
        }
    };
    typedef std::map<TwoTypes,Intersector,TwoTypesOrder> DispatchMap;
    DispatchMap& intersector_map()
    {
        static DispatchMap dispatch_table;
        return dispatch_table;
    }
    template<class Type1,class Type2>
    void register_intersector(Intersector pf)
    {
        intersector_map().insert(
            std::make_pair(&typeid(Type1),&typeid(Type2)),pf);
    }
    bool intersect(Shape* lhs,Shape* rhs)
    {
    DispatchMap::iterator p=
        intersector_map().find(std::make_pair(&typeid(*lhs),&typeid(*rhs)));
    return (*p->second)(lhs,rhs);
    }
    bool circles_intersect(Shape* lhs,Shape* rhs)
    {
        Circle* pc1=dynamic_cast<Circle*>(lhs);
        Circle* pc2=dynamic_cast<Circle*>(rhs);
        RECT r={0,0,800,600};
        drawtext("circles_intersect",&r,DT_CENTER|DT_VCENTER|DT_SINGLELINE);
        return true;
    }
    class Window{
    public:
        Window(int width,int height）               
        {
            initgraph(width,height);
            register_all_intersectors();
        }
        ~Window(){closegraph();}
    private:
        void register_all_intersectors()
        {
            register_intersector<Circle,Circle>(circles_intersect);
        }
    };

代码完全正确，实际连接时VC6报了一大堆错误：
--------------------Configuration: CGraphics - Win32 Debug--------------------
Compiling...
main.cpp
e:\visual c++ 6.0\include\xtree(183) : warning C4786: 'std::_Tree<std::pair<type_info const *,type_info const *>,std::pair<std::pair<type_info const *,type_info const *> const ,bool (__cdecl*)(Cgraphics::Shape *,Cgraphics::Shape *)>,std::map<std::pa
ir<type_info const *,type_info const *>,bool (__cdecl*)(Cgraphics::Shape *,Cgraphics::Shape *),Cgraphics::TwoTypesOrder,std::allocator<bool (__cdecl*)(Cgraphics::Shape *,Cgraphics::Shape *)> >::_Kfn,Cgraphics::TwoTypesOrder,std::allocator<bool (__cd
ecl*)(Cgraphics::Shape *,Cgraphics::Shape *)> >::_Redbl' : identifier was truncated to '255' characters in the debug information
  e:\visual c++ 6.0\include\xtree(174) : while compiling class-template member function '__thiscall std::_Tree<std::pair<type_info const *,type_info const *>,std::pair<std::pair<type_info const *,type_info const *> const ,bool (__cdecl*)(Cgrap
hics::Shape *,Cgraphics::Shape *)>,std::map<std::pair<type_info const *,type_info const *>,bool (__cdecl*)(Cgraphics::Shape *,Cgraphics::Shape *),Cgraphics::TwoTypesOrder,std::allocator<bool (__cdecl*)(Cgraphics::Shape *,Cgraphics::Shape *)> >::_Kfn
,Cgraphics::TwoTypesOrder,std::allocator<bool (__cdecl*)(Cgraphics::Shape *,Cgraphics::Shape *)> >::~std::_Tree<std::pair<type_info const *,type_info const *>,std::pair<std::pair<type_info const *,type_info const *> const ,bool (__cdecl*)(Cgraphics:
:Shape *,Cgraphics::Shape *)>,std::map<std::pair<type_info const *,type_info const *>,bool (__cdecl*)(Cgraphics::Shape *,Cgraphics::Shape *),Cgraphics::TwoTypesOrder,std::allocator<bool (__cdecl*)(Cgraphics::Shape *,Cgraphics::Shape *)> >::_Kfn,Cgra