将指针存储在地图中的成员函数中

我想将字符串映射到实例成员函数,并将每个映射存储在映射中.

这样做的干净方式是什么？

class  MyClass
{
   //........
   virtual double GetX();
   virtual double GetSomethingElse();
   virtual double GetT();
   virtual double GetRR();
   //........
};


class Processor
{
 private:
      typedef double (MyClass::*MemFuncGetter)();
      static map descrToFuncMap;

 public:
        static void Initialize();
        void Process(Myclass m, string);
};

void Processor::Initialize()
{

     descrToFuncMap["X"]=&MyClass::GetX;
     descrToFuncMap["SomethingElse"]=&MyClass::GetSomethingElse;
     descrToFuncMap["RR"]=&MyClass::GetRR;
     descrToFuncMap["T"]=&MyClass::GetT;
};
void Processor::Process(MyClass ms, const std::string& key)
{
     map::iterator found=descrToFuncMap.find(key);
     if(found!=descrToFuncMap.end())
     {
        MemFuncGetter memFunc=found->second;
        double dResult=(ms).*memFunc();    
        std::cout<<"Command="<class Processor {
private:
    typedef double (MyClass::*MemFuncGetter)();

    class FuncMap {
    public:
        FuncMap() {
            descrToFuncMap["X"]=&MyClass::GetX;
            descrToFuncMap["SomethingElse"]=&MyClass::GetSomethingElse;
            descrToFuncMap["RR"]=&MyClass::GetRR;
            descrToFuncMap["T"]=&MyClass::GetT;
        }

        // Of course you could encapsulate this, but its hardly worth
        // the bother since the whole class is private anyway.
        map descrToFuncMap;
    };

public:
    void Process(Myclass m, string);
};

void Processor::Process(MyClass ms, const std::string& key) {
    static FuncMap fm;      // Only gets initialised on first call
    map::iterator found=fm.descrToFuncMap.find(key);
    if(found!=fm.descrToFuncMap.end()) {
        MemFuncGetter memFunc=found->second;
        double dResult=(ms).*memFunc();    
        std::cout<<"Command="<FuncMap,但它足以满足您的需求.对于"true"Singleton,您可以将FuncMap构造函数声明为private并添加一个静态方法,例如getInstance(),将一个唯一实例定义为static变量并返回对它的引用.  Processor::Process()然后将使用它


FuncMap& fm = FuncMap::getInstance();