MISRAC++2023-13.3.1 (C++ only)
In this section:
Synopsis
(Required) User-declared member functions shall use the virtual, override and final specifiers appropriately
Enabled by default
Yes
Severity/Certainty
Medium/Medium

Full description
A non static member function shall either use no specifier or the virtual specifier if it is not overriding a base class member. If it overrides a base member it shall use the final or override specifier.
Coding standards
This check does not correspond to any coding standard rules.
Code examples
The following code example fails the check and will give a warning:
class A {
public:
virtual int f() final { return 42; }; // 'virtual' and 'final'
};
The following code example passes the check and will not give a warning about this issue:
class A {
public:
int f() { return 42; };
};