Destructor not called after destroying object placement-new'ed

Question

I had no clue why this doesn\'t work. The following Function is created by placement new. A function is provided that checks whether it should be destructed, and if

Answer 1

This is because ~Function(); in not a destructor call syntactically here. Use this->~Function(); instead.

~Function(); is parsed as an operator ~ and creation of the Function object on the stack. Function class has an operator bool that's why this will be compiled.

Answer 2

Change your explicit destructor call to

this->~Function();

Currently the ~Function is constructing a "Function" and then calling the ~ bitwise operator, (legal because you have a conversion to bool), and then destructing that, not the called object.

Answer 3

As I recall the destructor cannot be called explicitely. Try moving the cleanup code from destructor to other function and call it instead.