In the stack overflow post , I have the comment:
In C +11 you really want to do
virtual ~ A () = default; Otherwise, you will lose the alleged driver.
virtual ~ A () = what is default; For ?
Virtual ~ A () {} ?
The comment is not correct.
both:
virtual ~ a () = default;
and
virtual_a () {}
user declared . And inhibit members of the inactive conduction if the destroyer user is declared.
[dcl.fct.def.default] / p4 User declared and User provided Special member:
A special member function is provided by the user if it has been declared by the user and clearly not declared in the previous announcement or has been removed. / P>
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