*
* Introduced: version 2. */
NOTMUCH_FEATURE_BOOL_FOLDER = 1 << 3,
+
+ /* If set, missing messages are stored in ghost mail documents.
+ * If unset, thread IDs of ghost messages are stored as database
+ * metadata instead of in ghost documents.
+ *
+ * Introduced: version 3. */
+ NOTMUCH_FEATURE_GHOSTS = 1 << 4,
};
/* In C++, a named enum is its own type, so define bitwise operators