为指针数组重载 delete[]

Question

我搜索了一种方法来重载 delete[] 的运算符或代码的合适的析构函数：

#include <iostream>
#include <string>
using namespace std;

class A {
private:
    string name;
public:
    A(string name){
        this->name=name;
    };
    ~A(){
        cout<<"Destructor. Destroyed "<<name<<"\n";
    };
    void operator delete(void* p, A* a){
        cout<<"-Delete "<<a->name<<"\n";
    };
    void operator delete(void* pointer){
        cout<<"Delete"<<"\n";
    };
    void operator delete[](void* pointer){
        cout<<"Delete[]"<<"\n";
    };
};

int main(){
int number = 5;
A** a = new A* [ number ];

delete [] a;
    system("pause");
    return 0;
};

但无论我尝试什么，默认删除[] 每次都会从文件 delete2.cpp 启动。我做错了什么？ [已添加] 添加了重载 delete[] 的尝试。

Answer 1

您的代码没有创建或销毁 A 的实例，只是指向它的指针。

#include <iostream>
#include <string>
using namespace std;

class A {
private:
    string name;
public:
    A() {}
    A(string name){
        this->name=name;
    };
    ~A(){
        cout<<"Destructor. Destroyed "<<name<<"\n";
    };
    void operator delete(void* p, A* a){
        cout<<"-Delete "<<a->name<<"\n";
    };
    void operator delete(void* pointer){
        cout<<"Delete"<<"\n";
    };
    void operator delete[](void* pointer){
        cout<<"Delete[]"<<"\n";
    };
};

int main(){
int number = 5;
A* a = new A[ number ];

delete [] a;
    system("pause");
    return 0;
};

按预期调用运算符[]：http://ideone.com/EuS3Hi

为指针数组重载 delete[]

overload delete[] for array of pointers

c++

destructor

operator-overloading

delete-operator