Struct style::invalidation::media_queries::MediaListKey

pub struct MediaListKey(usize);

A key for a given media query result.

NOTE: It happens to be the case that all the media lists we care about happen to have a stable address, so we can just use an opaque pointer to represent them.

Also, note that right now when a rule or stylesheet is removed, we do a full style flush, so there’s no need to worry about other item created with the same pointer address.

If this changes, though, we may need to remove the item from the cache if present before it goes away.

Tuple Fields

0: usize

Implementations

impl MediaListKey

pub fn from_raw(k: usize) -> Self

Create a MediaListKey from a raw usize.

Trait Implementations

impl Clone for MediaListKey

fn clone(&self) -> MediaListKey

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for MediaListKey

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

Formats the value using the given formatter.

impl Hash for MediaListKey

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 MallocSizeOf for MediaListKey

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself.

impl PartialEq for MediaListKey

fn eq(&self, other: &MediaListKey) -> 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 MediaListKey

impl Eq for MediaListKey

impl StructuralPartialEq for MediaListKey