没有办法，我弄不明白为什么我编辑得好好的文章贴出去都变味了。给大家带来不便不能全怪我。但是故事还没讲完，无论如何我都得讲下去。我在用英文写的那个版本里（纯粹为了看看贴出去的效果）提到使用GProductCreator至少有两个原因，其中一个就是为了用于Factory模式。另外一个原因是，一个继承体系最好不要让用户自己来构造，而是将自己托管给一个对象生成器，所以它们应当把自己所有的constructor声明为private，而将这个生成器声明为自己的friend。GProductCreator正好可以充当这个角色。当然，GProductCreator的CreatePolicy参数应当由继承体系提供。
下面的代码用于对上述方法的测试：
#include "stdafx.h"
#include
#include
#include
#include "Factory.h"
#include "Singleton.h"
using namespace std;
using namespace Loki;
//classes for testing.begin:
class GObject
{
public:
virtual void print() = 0;
};
class GTank:public GObject
{
public:
virtual void print(){cout
struct GAbstractCreator
{
virtual AbstractProduct* operator()(){return 0;}
};
template
struct GProductCreator: public GAbstractCreator{Product* pP;AbstructProduct* operator()(){ return CreatePolicy::Create(pP);}};//Because The Create Poily I Used Is Polymorphic, Which The Loki Factory Did Not//Suport, I Add The FactoryUsingPointer Template Class Into The Libarytypedef Loki::FactoryUsingPointer Factory1;class Test;typedef Loki::FactoryUsingPointerFactory2; typedef Factory1 /*Or Factory2*/ TheFactory;typedef Loki::SingletonHolder theFactory;//Factory Uses Like This://if( !theFactory::Instance().Register(GEnemyTankA::get_id(), GProductCreator()) )// throw(); void f(){//Creator Test://the simplest using: typedef GProductCreator TheTankCreator;TheTankCreator theTankCreator;theTankCreator.operator ()() -print();//let's use it a little more complex:GProductCreator()()-print();//using default template argument:GProductCreator()()-print();//ok, the complier seems not so displeasing, it works really well,//I think should not curse ms this morning.//Factory Test://now, let's try the Factory method:Factory1 factory1;factory1.Register(1, &theTankCreator);//ok. //Singleton Test://try Singleton:theFactory::Instance().Register(2, &theTankCreator); theFactory::Instance().CreateObject(2)-print();//ok.//Final Test//now, let me give the compiler a puzzle:SingletonHolder //FactoryUsingPointer As The First Template Argument Of SingletonHolder.,CreateUsingMalloc,PhoenixSingleton::Instance().Register(1, &GProductCreator()); //oh! not give the compiler a puzzle, but you and me!//ok,the Creation Policy, the Factory Policy with Polymorphic Creator and//the Singleton Pattern, they do work together very well, that's GREAT!//ESPECIALLY, the FactoryUsingPointer and the GProductCreator are EXCITING!}int main(int argc, char* argv[]){try{ f();}catch(DefaultFactoryError::Exception e){ cout