C++/CLI重載運營商不通過C＃訪問

Question

我有下面的C++/CLI類：

public ref class MyClass 
    { 
    public: 
     int val; 
     bool operator==(MyClass^ other) 
     { 
      return this->val == other->val; 
     } 

     bool Equals(MyClass^ other) 
     { 
      return this == other; 
     } 
    }; 

當我嘗試從C＃的MyClass兩個實例是否相等，我得到一個錯誤的結果來驗證：

MyClass a = new MyClass(); 
MyClass b = new MyClass(); 

//equal1 is false since the operator is not called 
bool equal1 = a == b; 
//equal2 is true since the comparison operator is called from within C++\CLI 
bool equal2 = a.Equals(b); 

我在做什麼錯了？

Answer 1

您正在超載的==運算符在C＃中不可訪問，行bool equal1 = a == b比較a和b作爲參考。

二元運算符在C＃靜態方法重寫，你需要提供這個操盤手：

static bool operator==(MyClass^ a, MyClass^ b) 
{ 
    return a->val == b->val; 
} 

當重寫==你也應該重寫!=。在C＃中，這實際上是由編譯器強制執行的。