35 class Version;  variable
59 class Version {
133   Version* next_;               // Next version in linked list
134   Version* prev_;               // Previous version in linked list
150   explicit Version(VersionSet* vset)  in Version()  function
158   ~Version();
161   Version(const Version&);
162   void operator=(const Version&);
185   Version* current() const { return current_; }  in current()
252     Version* v = current_;  in NeedsCompaction()
262   uint64_t ApproximateOffsetOf(Version* v, const InternalKey& key);
275   friend class Version;  variable
279   void Finalize(Version* v);
295   void AppendVersion(Version* v);
311   Version dummy_versions_;  // Head of circular doubly-linked list of versions.
312   Version* current_;        // == dummy_versions_.prev_
366   friend class Version;
373   Version* input_version_;