Struct RollUp 

pub struct RollUp {
    pub files: u64,
    pub dirs: u64,
    pub bytes: u64,
    pub allocated: u64,
    pub newest_mtime_ns: i64,
    pub by_ext: BTreeMap<String, ExtTally>,
}

Pre-computed aggregate state for one directory’s entire subtree.

What is counted

bytes and allocated sum files only. Directories contribute their own subtree plus one to dirs, but their own inode block usage is not added — unlike du, which counts directory blocks. The difference is small and constant per directory, and making it configurable is deferred rather than guessed at.

newest_mtime_ns is the newest modification time among descendant files. Directory mtimes are excluded because they change on every child add or remove, which makes “what changed recently” answer with directories instead of the edits a user actually made.

Fields

files: u64

Descendant files.

dirs: u64

Descendant directories, not counting the directory that owns this roll-up.

bytes: u64

Apparent bytes across descendant files.

allocated: u64

Allocated bytes across descendant files.

newest_mtime_ns: i64

Newest mtime among descendant files, or 0 when there are none.

by_ext: BTreeMap<String, ExtTally>

Per-extension file and byte tallies across the subtree.

Trait Implementations

impl Clone for RollUp

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for RollUp

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for RollUp

fn default() -> Self

Returns the “default value” for a type.

impl Eq for RollUp

impl PartialEq for RollUp

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for RollUp