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C++ OOP

bookThe Final Keyword

The final keyword plays a crucial role in defining classes and controlling inheritance hierarchies. It provides developers with a powerful mechanism to restrict certain aspects of class design.

The usage of final keyword

When a class is declared as final, it indicates that the class cannot be subclassed further. In other words, it serves as the end point of the inheritance hierarchy, disallowing any further derivation.

Example.cpp

Example.cpp

copy

              
12345678

            
class Example final {
    // Class members and methods
};

//  cannot derive from final base Example
class ExtendedExample: public Example {
    // Class members and methods
};

This feature is especially valuable when you aim to restrict the modification or extension of a specific class, or when you prefer using your class through composition rather than inheritance. It also offers other benefits, such as improving code clarity and enabling certain compiler optimizations.

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What does the final keyword do when applied to a class?

Select the correct answer

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SectionΒ 4. ChapterΒ 6

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bookThe Final Keyword

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The final keyword plays a crucial role in defining classes and controlling inheritance hierarchies. It provides developers with a powerful mechanism to restrict certain aspects of class design.

The usage of final keyword

When a class is declared as final, it indicates that the class cannot be subclassed further. In other words, it serves as the end point of the inheritance hierarchy, disallowing any further derivation.

Example.cpp

Example.cpp

copy

              
12345678

            
class Example final {
    // Class members and methods
};

//  cannot derive from final base Example
class ExtendedExample: public Example {
    // Class members and methods
};

This feature is especially valuable when you aim to restrict the modification or extension of a specific class, or when you prefer using your class through composition rather than inheritance. It also offers other benefits, such as improving code clarity and enabling certain compiler optimizations.

question mark

What does the final keyword do when applied to a class?

Select the correct answer

Everything was clear?

How can we improve it?

Thanks for your feedback!

SectionΒ 4. ChapterΒ 6
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