Reassign unique_ptr object with make_unique statements - Memory leak?

Question

I don\'t get what following statement would do (specially second line)?

auto buff = std::make_unique(128);
buff = std::make_unique(512)         


        

Answer 1

Move assignment operator is called, which does

if (this != &_Right)
{   // different, do the swap
    reset(_Right.release());
    this->get_deleter() = _STD move(_Right.get_deleter());
}

No leak here, as it does reset, which will deallocate.