What is a nested class and when would you use a nested class?

What is a nested class and when would you use a nested class?

A nested class is a member of its enclosing class. Non-static nested classes (inner classes) have access to other members of the enclosing class, even if they are declared private. Static nested classes do not have access to other members of the enclosing class.

When should I use nested inner class?

When to Use Nested Classes, Local Classes, Anonymous Classes, and Lambda Expressions. As mentioned in the section Nested Classes, nested classes enable you to logically group classes that are only used in one place, increase the use of encapsulation, and create more readable and maintainable code.

What is nested class what is its use explain with example?

A nested class is a member and as such has the same access rights as any other member. The members of an enclosing class have no special access to members of a nested class; the usual access rules shall be obeyed. For example, program 1 compiles without any error and program 2 fails in compilation.

What is inheritance and list all its types?

Inheritance is a mechanism of acquiring the features and behaviors of a class by another class. The class whose members are inherited is called the base class, and the class that inherits those members is called the derived class. Inheritance implements the IS-A relationship.

Why would one use nested classes in C + +?

Assume you want to have a class SomeSpecificCollection which would aggregate objects of class Element. You can then either: introduce a namespace someSpecificCollection and declare classes someSpecificCollection::Collection and someSpecificCollection::Element. No risk of name clash, but can it get any more verbose?

How to avoid nested namespaces in C #?

Section 9.4.2 paragraph 4 in the C# language specification explains this behavior explicitly: A using-namespace-directive imports the types contained in the given namespace, but specifically does not import nested namespaces. It even goes on to give an example that is very similar to your own.

How is an inline namespace different from a nested namespace?

In contrast to an ordinary nested namespace, members of an inline namespace are treated as members of the parent namespace. This characteristic enables argument dependent lookup on overloaded functions to work on functions that have overloads in a parent and a nested inline namespace.

Can a using namespace directive import a nested namespace?

A using-namespace-directive imports the types contained in the given namespace, but specifically does not import nested namespaces. It even goes on to give an example that is very similar to your own.