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Classes with missing destructor declarations can be unproductive

[/vc_column_text][vc_column_text pl=”0″ pr=”0″ pt=”0″ pb=”0″]This code insight highlights a violation when a class has missing destructor declarations

class Vehicle
{
public:
Vehicle();
virtual ~Vehicle();
void start();
void stop();
virtual void run();
protected:
Engine* theEngine;
};

class Car : public Vehicle
{
public:
Car();
~Car(); // VIOLATION
protected:
int numberOfWheels;
};

 

Remedy

class Car : public Vehicle
{
public:
Car();
virtual ~Car(); // FIXED
protected:
int numberOfWheels;
};[/vc_column_text][vc_empty_space height=”12px”][vc_empty_space height=”32px”][vc_single_image image=”5362″ img_link_large=”” img_link_target=”_self” img_size=”full” alignment=”none”][vc_row_inner][vc_column_inner width=”1/2″][vc_column_text pl=”0″ pr=”0″ pt=”0″ pb=”0″]

Why you should care

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A missing virtual keyword in front of a destructor “overriding” a virtual destructor will hide the polymorphic nature of the destructor from developers using the class. They may not know that at execution time other destructors in the inheritance tree will be executed. A missing virtual keyword may also be an indication that the author of the destructor ignored the fact that it needed to be virtual and thus was not aware that the destructor requires specific attention and specific coding.

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Business Impacts

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CAST recommendations

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References

https://www.tutorialspoint.com/sql/sql-transactions.htm[/vc_column_text][/vc_column_inner][/vc_row_inner][vc_row_inner][vc_column_inner width=”1/1″][vc_single_image image=”5362″ img_link_large=”” img_link_target=”_self” img_size=”full” alignment=”none”][vc_column_text pl=”0″ pr=”0″ pt=”0″ pb=”0″]

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