how delete class variable in struct?-CodePudding

InitMyObject(MyObject* ptr)
{
    *ptr = MyObject();
}

struct Data
{
    MyObject obj;
};

extern Data data;


// ...

InitMyObject(&data.obj); 

delete &data.obj; // ? is this ok

How I can delete (call deconstructor) data.obj, I also try Data::obj as pointer (nullptr default) then pass the pointer but crashed on Init.

CodePudding user response：

How I can delete (call deconstructor) data.obj

The destructor of data will destroy its subobjects. Since data has static storage, it is automatically destroyed at the end of the program.

delete &data.obj; // ? is this ok

No. You may only delete the result of a non-placement new expression. You may not delete a pointer to a member object.