136     last_ = std::copy(first, first + n, last_);  in write_seq()
150       *last_++ = '0';  in write_hex()
151       *last_++ = 'x';  in write_hex()
152       *last_++ = '0';  in write_hex()
153       *last_++ = '0';  in write_hex()
169     *last_++ = '0';  in write_hex()
170     *last_++ = 'x';  in write_hex()
172     last_ += nlen;  in write_hex()
175     auto p = last_ - 1;  in write_hex()
196   size_t rleft() { return last_ - begin_; }  in rleft()
197   size_t wleft() { return end_ - last_; }  in wleft()
198   void update_full() { full_ = last_ == end_; }  in update_full()
203   uint8_t *last_;  variable