是否未定义在重载的operator new中初始化类成员？

#include <iostream>

class MyClass {
public:
    int value;

    MyClass() {
        std::cout << "Constructor called" << std::endl;
    }
};

void* operator new(size_t size) {
    void* ptr = malloc(size);
    if (ptr != nullptr) {
        MyClass* obj = static_cast<MyClass*>(ptr);
        new(obj) MyClass(); // 调用构造函数初始化类成员
    }
    return ptr;
}

int main() {
    MyClass* obj = new MyClass();
    std::cout << "Value: " << obj->value << std::endl;
    delete obj;
    return 0;
}