IT. Expert System.

final is an identifier with a special meaning when used in a member function declaration or class head. In other contexts it is not reserved and may be used to name objects and functions.

Syntax:

declarator < pure-specifier>

1) In a member function declaration, final may appear in virt-specifier-seq immediately after the declarator, and before the pure-specifier, if used.

Example:

struct A
{
    virtual void foo() final; // A::foo is final
    void bar() final; // Error: non-virtual function cannot be final
};
 
struct B final : A // struct B is final
{
    void foo(); // Error: foo cannot be overridden as it's final in A
};
 
struct C : B // Error: B is final
{
};

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