The Order of Destructors’ Call

The Order of Destructors’ Call

An object’s destructor invokes the destructors of its direct base classes and member objects. The invocation occurs in the reverse order of the construction of the subobjects. Note, however, that all destructors are called with their qualified name, ignoring any possible virtual overriding destructors in derived classes. For example:

   struct A  {    virtual ~A() { cout << "destroying A" << endl; }  };  struct B: public A  {    ~B() { cout << "destroying B" << endl;}   };  int main()  {    B b;  };

This program displays:

   destroying B  destroying A 

This is because the compiler inserts additional code into the user-defined destructor of class B. The augmented destructor looks like this:

   B::~B()   {      //user-written code    cout<<"destroying B"<A::~A();   // (1) destructor called with its qualified name  }

In other words, although the destructor of class A is virtual, the qualified call inserted into the destructor of B is resolved statically (a function call with a qualified name bypasses the virtual mechanism). Therefore, A's destructor is called rather than B's when the statement marked (1) is executed.

Share the Post:
Heading photo, Metadata.

What is Metadata?

What is metadata? Well, It’s an odd concept to wrap your head around. Metadata is essentially the secondary layer of data that tracks details about the “regular” data. The regular

XDR solutions

The Benefits of Using XDR Solutions

Cybercriminals constantly adapt their strategies, developing newer, more powerful, and intelligent ways to attack your network. Since security professionals must innovate as well, more conventional endpoint detection solutions have evolved

AI is revolutionizing fraud detection

How AI is Revolutionizing Fraud Detection

Artificial intelligence – commonly known as AI – means a form of technology with multiple uses. As a result, it has become extremely valuable to a number of businesses across

AI innovation

Companies Leading AI Innovation in 2023

Artificial intelligence (AI) has been transforming industries and revolutionizing business operations. AI’s potential to enhance efficiency and productivity has become crucial to many businesses. As we move into 2023, several

data fivetran pricing

Fivetran Pricing Explained

One of the biggest trends of the 21st century is the massive surge in analytics. Analytics is the process of utilizing data to drive future decision-making. With so much of

kubernetes logging

Kubernetes Logging: What You Need to Know

Kubernetes from Google is one of the most popular open-source and free container management solutions made to make managing and deploying applications easier. It has a solid architecture that makes