Returns true iff the reader is positioned to a key/val pair. REQUIRES: status().ok()
| 275 | // Returns true iff the reader is positioned to a key/val pair. |
| 276 | // REQUIRES: status().ok() |
| 277 | bool Valid() const { return iter_->Valid(); } |
| 278 | |
| 279 | // Returns the key at the current position. |
| 280 | // REQUIRES: status().ok() && Valid() |
no outgoing calls