Struct StorageRevision 

pub struct StorageRevision {
    pub len: u64,
    pub modified_nanos: u128,
}

Cheap fingerprint of a database file, used to answer “has anyone else written since I last looked?” without reparsing.

Fields

len: u64

Size of the database file in bytes (0 when it does not exist).

modified_nanos: u128

Last modification time in nanoseconds since the Unix epoch.

Implementations

impl StorageRevision

pub fn of<P: AsRef<Path>>(path: P) -> Result<Self, LinkError>

Reads the current revision of path.

A missing file is reported as StorageRevision::default rather than an error, so callers can fingerprint a database before it has been created.

Trait Implementations

impl Clone for StorageRevision

fn clone(&self) -> StorageRevision

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for StorageRevision

impl Debug for StorageRevision

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

Formats the value using the given formatter.

impl Default for StorageRevision

fn default() -> StorageRevision

Returns the “default value” for a type.

impl Eq for StorageRevision

impl PartialEq for StorageRevision

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for StorageRevision