Question

我有以下C ++ / CLI类：

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

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

当我尝试从C＃验证MyClass的两个实例是否相等时，我得到了错误的结果：

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);

我做错了什么？

Answer 1

您要重载的==运算符无法在C＃中访问，而bool equal1 = a == b行会通过引用比较a和b。

二进制运算符被C＃中的静态方法覆盖，您需要提供此运算符：

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

覆盖==时，您还应覆盖!=。在C＃中，这实际上是由编译器强制执行的。

不通过C＃访问C ++ / CLI重载操作符

1 个答案: