Enum Source 

pub enum Source {
    Scanned,
    Revalidated,
    JournalScoped,
    Cached,
}

Where a value came from, so a consumer can trade speed for certainty knowingly.

Ordered weakest-last: comparing two sources yields the one to trust less, which is what a roll-up needs when combining a subtree.

Variants

Scanned

Observed from the filesystem by this process.

Revalidated

Loaded from a snapshot and re-verified by a fresh stat this session.

JournalScoped

Loaded from a snapshot; a change journal reported nothing touching this subtree since the cursor, and nothing has re-checked it.

Named for what actually happened — a journal scoped the work — rather than for what a reader might wish it meant. Nothing here was confirmed against the filesystem: a scoped revalidation stats the paths the journal names and does not stat the rest, so this value rests on the journal having been complete.

It is deliberately weaker than Self::Revalidated because that assumption is known to fail. macOS FSEvents will report HistoryDone after silently dropping history, with no degradation flag, which means a journal answer can be wrong without announcing it. Journal-assisted revalidation therefore bounds exposure with a maximum age and a periodic full sweep; those are risk controls, not proofs, and they do not make any individual answer here verified.

Cached

Loaded from a snapshot and not re-checked since.

Implementations

impl Source

pub const fn is_verified(self) -> bool

Whether a value from this source was checked against the filesystem during this session.

Trait Implementations

impl Clone for Source

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Source

impl Debug for Source

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

Formats the value using the given formatter.

impl Default for Source

fn default() -> Self

Returns the “default value” for a type.

impl Eq for Source

impl Hash for Source

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Source

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for Source

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Source

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for Source