Course Content
C++ OOP
C++ OOP
The 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
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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