When a class has virtual method, you need to write a virtual destructor to properly free the memory in the destructor.
In my case, I don't have a virtual method in the class and neither any sub-classes.
When I compile the program using gcc with "-Wdelete-non-virtual-dtor" flag I get a warning. Rewriting the destructor as virtual indeed removes the warning, but I don't want to rewrite the destructor of the class as virtual since it doesn't have any sub-classes. Is there any way to suppress the warning "-Wdelete-non-virtual-dtor" and tell the compiler there is no inheritance - sub-classes for this class? It's not a specific gcc version or gcc question.
UPDATE: Discovered that my class has inheritance of other class that has virtual functions and thus itself has virtual functions.
The accept answer was that I missed that the class is indeed virtual (since it inherits another class with virtual functions). Since it doesn't have sub-classes and should have ones, I can add "final" keyword to the class to solved the issue.
Simple code example:
#include <iostream>
class A {
public:
int a;
virtual void f() {};
};
template<class T> void foo() {
T *obj = new T;
delete obj;
}
int main()
{
foo<A>();
std::cout << "Done" << std::endl;
}
Adding final to class A - also removed the warning.
Mark the class as final (from C++11).
Then it can't have a child class, so you don't need to worry about the implications of having a non-virtual destructor. A compiler should be aware of that and suppress the warning.