Struct MetricGeneration 

pub struct MetricGeneration(/* private fields */);

Monotonic generation counter for metric cache invalidation.

Each font metric change increments the generation. Caches compare their stored generation against the current one to detect staleness.

Implementations

impl MetricGeneration

pub const ZERO: Self

Initial generation.

pub fn next(self) -> Self

Advance to the next generation.

pub const fn get(self) -> u64

Raw generation value.

Trait Implementations

impl Clone for MetricGeneration

fn clone(&self) -> MetricGeneration

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MetricGeneration

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

Formats the value using the given formatter.

impl Default for MetricGeneration

fn default() -> MetricGeneration

Returns the “default value” for a type.

impl Display for MetricGeneration

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

Formats the value using the given formatter.

impl Hash for MetricGeneration

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 MetricGeneration

fn cmp(&self, other: &MetricGeneration) -> 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.

impl PartialEq for MetricGeneration

fn eq(&self, other: &MetricGeneration) -> 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 PartialOrd for MetricGeneration

fn partial_cmp(&self, other: &MetricGeneration) -> 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 Copy for MetricGeneration

impl Eq for MetricGeneration

impl StructuralPartialEq for MetricGeneration