removed in the filesystem. if the item is still really there, then the
next rescan will put it back into the tree. */
+ basis::outcome make_directories(const basis::astring new_root);
+ //!< creates all of the directories in this object, but start at the "new_root".
+
static bool compare_trees(const directory_tree &source,
const directory_tree &target, filename_list &differences,
file_info::file_similarity how_to_compare);