overriding the instance next function

Given that, the following seems to do what you're after:

>>> test.__class__.next = type(test.__class__.next)(new_next, test, test.__class__) >>>
   next(test)
2

Suggestion : 2

An instance method in a subclass with the same signature (name, plus the number and the type of its parameters) and return type as an instance method in the superclass overrides the superclass's method.,The ability of a subclass to override a method allows a class to inherit from a superclass whose behavior is "close enough" and then to modify behavior as needed. The overriding method has the same name, number and type of parameters, and return type as the method that it overrides. An overriding method can also return a subtype of the type returned by the overridden method. This subtype is called a covariant return type.,The method Mustang.identifyMyself returns the string I am a horse. The class Mustang inherits the method identifyMyself from the class Horse, which overrides the abstract method of the same name in the interface Mammal.,The access specifier for an overriding method can allow more, but not less, access than the overridden method. For example, a protected instance method in the superclass can be made public, but not private, in the subclass.

public class Animal {
   public static void testClassMethod() {
      System.out.println("The static method in Animal");
   }
   public void testInstanceMethod() {
      System.out.println("The instance method in Animal");
   }
}

public class Cat extends Animal {
   public static void testClassMethod() {
      System.out.println("The static method in Cat");
   }
   public void testInstanceMethod() {
      System.out.println("The instance method in Cat");
   }

   public static void main(String[] args) {
      Cat myCat = new Cat();
      Animal myAnimal = myCat;
      Animal.testClassMethod();
      myAnimal.testInstanceMethod();
   }
}

The static method in Animal
The instance method in Cat

Consider the following classes and interfaces:

public class Horse {
   public String identifyMyself() {
      return "I am a horse.";
   }
}

public class Horse {
    public String identifyMyself() {
        return "I am a horse.";
    }
}

public interface Flyer {
   default public String identifyMyself() {
      return "I am able to fly.";
   }
}

public interface Flyer {
    default public String identifyMyself() {
        return "I am able to fly.";
    }
}

public interface Mythical {
   default public String identifyMyself() {
      return "I am a mythical creature.";
   }
}

Consider the following interfaces and classes:

public interface Animal {
   default public String identifyMyself() {
      return "I am an animal.";
   }
}

public interface Animal {
    default public String identifyMyself() {
        return "I am an animal.";
    }
}

public interface EggLayer extends Animal {
   default public String identifyMyself() {
      return "I am able to lay eggs.";
   }
}

public interface EggLayer extends Animal {
    default public String identifyMyself() {
        return "I am able to lay eggs.";
    }
}

public interface FireBreather extends Animal {}

1._

public class Animal {
   public static void testClassMethod() {
      System.out.println("The static method in Animal");
   }
   public void testInstanceMethod() {
      System.out.println("The instance method in Animal");
   }
}

2._

public class Cat extends Animal {
   public static void testClassMethod() {
      System.out.println("The static method in Cat");
   }
   public void testInstanceMethod() {
      System.out.println("The instance method in Cat");
   }

   public static void main(String[] args) {
      Cat myCat = new Cat();
      Animal myAnimal = myCat;
      Animal.testClassMethod();
      myAnimal.testInstanceMethod();
   }
}

3._

The static method in Animal
The instance method in Cat

public class Horse {
    public String identifyMyself() {
        return "I am a horse.";
    }
}

public interface Flyer {
   default public String identifyMyself() {
      return "I am able to fly.";
   }
}

public interface Flyer {
    default public String identifyMyself() {
        return "I am able to fly.";
    }
}

public interface Mythical {
   default public String identifyMyself() {
      return "I am a mythical creature.";
   }
}

Suggestion : 3

In this program, we have called the overridden function inside the Derived class itself.,Notice the code Base::print();, which calls the overridden function inside the Derived class.,As we can see, the function was overridden because we called the function from an object of the Derived class.,Had we called the print() function from an object of the Base class, the function would not have been overridden.

Example 1: C++ Function Overriding

// C++ program to demonstrate function overriding

#include <iostream>
using namespace std;

class Base {
   public:
    void print() {
        cout << "Base Function" << endl;
    }
};

class Derived : public Base {
   public:
    void print() {
        cout << "Derived Function" << endl;
    }
};

int main() {
    Derived derived1;
    derived1.print();
    return 0;
}

Output

Derived Function

Had we called the print() function from an object of the Base class, the function would not have been overridden.

// Call function of Base class
Base base1;
base1.print(); // Output: Base Function

Here, this statement

derived2.Base::print();

Example 3: C++ Call Overridden Function From Derived Class

// C++ program to call the overridden function
// from a member function of the derived class

#include <iostream>
using namespace std;

class Base {
   public:
    void print() {
        cout << "Base Function" << endl;
    }
};

class Derived : public Base {
   public:
    void print() {
        cout << "Derived Function" << endl;

        // call overridden function
        Base::print();
    }
};

int main() {
    Derived derived1;
    derived1.print();
    return 0;
}

Suggestion : 4

Function overriding is a feature that allows us to have a same function in child class which is already present in the parent class. A child class inherits the data members and member functions of parent class, but when you want to override a functionality in the child class then you can use function overriding. It is like creating a new version of an old function, in the child class.,Note: In function overriding, the function in parent class is called the overridden function and function in child class is called overriding function.,To override a function you must have the same signature in child class. By signature I mean the data type and sequence of parameters. Here we don’t have any parameter in the parent function so we didn’t use any parameter in the child function.,To do this in the above example, we can write following statement in the disp() function of child class:

To override a function you must have the same signature in child class. By signature I mean the data type and sequence of parameters. Here we don’t have any parameter in the parent function so we didn’t use any parameter in the child function.

#include <iostream>
using namespace std;
class BaseClass {
public:
   void disp(){
      cout<<"Function of Parent Class";
   }
};
class DerivedClass: public BaseClass{
public:
   void disp() {
      cout<<"Function of Child Class";
   }
};
int main() {
   DerivedClass obj = DerivedClass();
   obj.disp();
   return 0;
}

Output:

Function of Child Class

As we have seen above that when we make the call to function (involved in overriding), the child class function (overriding function) gets called. What if you want to call the overridden function by using the object of child class. You can do that by creating the child class object in such a way that the reference of parent class points to it. Lets take an example to understand it.

#include <iostream>
using namespace std;
class BaseClass {
public:
   void disp(){
      cout<<"Function of Parent Class";
   }
};
class DerivedClass: public BaseClass{
public:
   void disp() {
      cout<<"Function of Child Class";
   }
};
int main() {
   /* Reference of base class pointing to
    * the object of child class.
    */
   BaseClass obj = DerivedClass(); 
   obj.disp();
   return 0;
}

To do this in the above example, we can write following statement in the disp() function of child class:

BaseClass::disp();

Suggestion : 5

Last Updated : 26 Jul, 2022

Parent 's show()
Child 's show()

From parent m2()
From child m2()

Output:

13: error: show() in Child cannot override show() in Parent
void show() {} ^
   overridden method is final

From parent static m1()
From child non - static(instance) m2()

Output:

error: m2() in Child cannot override m2() in Parent
void m2() throws Exception {
      System.out.println("From child m2");
   } ^
   overridden method does not
throw Exception

Suggestion : 6

Method overloading vs. method overriding,Can we override the static method,Understanding the problem without method overriding,Method overriding is used for runtime polymorphism

Vehicle is running

Bike is running safely

Output:
   SBI Rate of Interest: 8
ICICI Rate of Interest: 7
AXIS Rate of Interest: 9

Suggestion : 7

When set_inst_override_by_type() doesn't work, it's most likely due to the hierarchical path being incorrect. The path is relative to the hierarchy of the call, so it should be "c1.gc1".,Prototype for function set_inst_override_by_type is :,functiont_inst_override_by_type ( uvm_object_wrapper original_type, uvm_object_wrapper override_type, string full_inst_path ),Or if I want to use the convenience function then I'll have to give the relative hierarchical path to the component I want to override. @Shipra_s, the prototype for the convenience function that I'm using is -

uvm_factory factory = factory.get();
factory.set_inst_override_by_type(grandchild::get_type(), newgrandchild::get_type(), {
   get_full_name(),
   ".e.c1.gc1"
});

function void set_inst_override_by_type(string relative_inst_path,
   uvm_object_wrapper original_type,
   uvm_object_wrapper override_type)