Miscellaneous-NoVirtualDestructor

Class needs a virtual destructor if at least one member function is virtual

Required inputs: IR

Classes that are used polymorphically should have a virtual destructor.

If an object is deleted through a pointer to a base class and that base class does not have a virtual destructor, undefined behavior occurs.

Example

class C {
    C() {} // explicit constructor, may take arguments
    C(const C&) = delete;
    C& operator=(const C&) = delete;
    virtual ~C() { }
};

Note that the GeneralPurpose-RuleOfThree requires that you also declare copy constructor and copy assignment operators when declaring a virtual destructor. You should declare these as deleted if the class is not supposed to be copyable.

Possible Messages

Key	Text	Severity	Disabled
missing_virtual_destructor	Class needs a virtual destructor.	None	False

Options

• This rule shares the following common options: exclude_in_macros, exclude_messages_in_system_headers, excludes, extend_exclude_to_macro_invocations, includes, justification_checker, languages, post_processing, provider, report_at, severity

• The following places define options that affect this rule: Stylechecks, Analysis-GlobalOptions

accept_none_destructor

accept_none_destructor : bool = True

If set true, classes without any destructor are tolerated.