Synopsis

(Required) An accessible base class shall not be both virtual and non-virtual in the same hierarchy

Enabled by default

Yes

Severity/Certainty

Medium/High

Full description

This makes it confusing whether the intent is to have the base object instantiated one or more times. This check is identical to MISRAC++2023-13.1.2.

Coding standards

Code examples

The following code example fails the check and will give a warning:

class A {};
class B: public virtual A {};

class C: public A,B {}; // Non-compliant

The following code example passes the check and will not give a warning about this issue:

class A {};
class B: public virtual A {};

class C: public virtual A, B {}; // Compliant