Struct SourceFingerprint 

pub struct SourceFingerprint {
    pub mtime_ns: u64,
    pub file_size: u64,
}

File metadata used to decide whether a source-derived cache entry is fresh.

This is intentionally metadata-only. Callers that need content validation can combine it with their existing content hash, while cheap caches can use the same freshness shape without inventing their own (mtime, size) tuple.

Fields

mtime_ns: u64

Source file modification time as nanoseconds since the Unix epoch.

A value of 0 means the timestamp could not be read. Fast metadata-only cache hits should treat that as unknown and miss conservatively.

file_size: u64

Source file size in bytes.

Implementations

impl SourceFingerprint

pub const fn new(mtime_ns: u64, file_size: u64) -> Self

Build a fingerprint from explicit metadata parts.

pub fn from_metadata(metadata: &Metadata) -> Self

Build a fingerprint from filesystem metadata.

pub const fn has_known_mtime(self) -> bool

Returns true when the modification time is known.

Trait Implementations

impl Clone for SourceFingerprint

fn clone(&self) -> SourceFingerprint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for SourceFingerprint

impl Debug for SourceFingerprint

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SourceFingerprint

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for SourceFingerprint

impl Hash for SourceFingerprint

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 PartialEq for SourceFingerprint

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for SourceFingerprint

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for SourceFingerprint