Method erase

common/unordered_inline_set.h:126–126

        iterator operator++(int)    { auto r = *this; seek(1);  return r; }
        iterator operator--(int)    { auto r = *this; seek(-1); return r; }
        void erase()                { _a->erase(_i); }
        const T& operator*() const  { return *_a->get(_i); }
        const T* operator->() const { return  _a->get(_i); }
        template<typename P>