Struct CacheKey 

struct CacheKey {
    kd_available_space: u64,
    parent_size: u64,
    known_dimensions_are_definite: Size<bool>,
}

Space-optimised cache key that packs bits into as small a size as possible

Fields

kd_available_space: u64

The initial cached size of the node itself

parent_size: u64

The initial cached size of the parent’s node

known_dimensions_are_definite: Size<bool>

Whether each known dimension is definite. Normalized such that an axis without a known dimension is always true.

Implementations

impl CacheKey

fn parent_size(&self) -> u64

Return the parent size with the extra bits that encode the requested axis masked out

fn x_axis_parent_size(&self) -> u64

Return the parent size with the extra bits that encode the requested axis masked out And the y-axis value masked out

fn requested_axis_bits(&self) -> u64

Return the bits that encode the requested axis

fn size_is_valid_for(&self, other: &CacheKey) -> bool

Whether a cached entry with this key contains a valid size for the axis requested by other. Sizes computed for a single axis may contain garbage values in the other axis, so an entry is only usable if it was computed for the same axis (or for both axes).

Trait Implementations

impl Clone for CacheKey

fn clone(&self) -> CacheKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CacheKey

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

Formats the value using the given formatter.

impl From<&LayoutInput> for CacheKey

fn from(input: &LayoutInput) -> Self

Converts to this type from the input type.

impl PartialEq for CacheKey

fn eq(&self, other: &CacheKey) -> 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 Copy for CacheKey

impl Eq for CacheKey

impl StructuralPartialEq for CacheKey