Method append

contrib/libs/pugixml/pugixml.cpp:8577–8599

        }

        void append(const xpath_node* begin_, const xpath_node* end_, xpath_allocator* alloc)
        {
            if (begin_ == end_) return;

            size_t size_ = static_cast<size_t>(_end - _begin);
            size_t capacity = static_cast<size_t>(_eos - _begin);
            size_t count = static_cast<size_t>(end_ - begin_);

            if (size_ + count > capacity)
            {
                // reallocate the old array or allocate a new one
                xpath_node* data = static_cast<xpath_node*>(alloc->reallocate(_begin, capacity * sizeof(xpath_node), (size_ + count) * sizeof(xpath_node)));
                assert(data);

                // finalize
                _begin = data;
                _end = data + size_;
                _eos = data + size_ + count;
            }

            memcpy(_end, begin_, count * sizeof(xpath_node));
            _end += count;
        }

        void sort_do()
        {