Enum QueryFeatureExpressionKind 

enum QueryFeatureExpressionKind {
    Empty,
    Single(QueryExpressionValue),
    LegacyRange(LegacyRange, QueryExpressionValue),
    Range {
        left: Option<(Operator, QueryExpressionValue)>,
        right: Option<(Operator, QueryExpressionValue)>,
    },
}

Variants

Empty

Just the media feature name.

Single(QueryExpressionValue)

A single value.

LegacyRange(LegacyRange, QueryExpressionValue)

Legacy range syntax (min-*: value) or so.

Range

Modern range context syntax: https://drafts.csswg.org/mediaqueries-5/#mq-range-context

Fields

left: Option<(Operator, QueryExpressionValue)>

right: Option<(Operator, QueryExpressionValue)>

Implementations

impl QueryFeatureExpressionKind

fn evaluate<T>( &self, context_value: T, compute: impl FnMut(&QueryExpressionValue) -> T, ) -> bool

where T: PartialOrd + Zero,

Evaluate a given range given an optional query value and a value from the browser.

fn non_ranged_value(&self) -> Option<&QueryExpressionValue>

Non-ranged features only need to compare to one value at most.

Trait Implementations

impl Clone for QueryFeatureExpressionKind

fn clone(&self) -> QueryFeatureExpressionKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QueryFeatureExpressionKind

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

Formats the value using the given formatter.

impl MallocSizeOf for QueryFeatureExpressionKind

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 QueryFeatureExpressionKind

fn eq(&self, other: &QueryFeatureExpressionKind) -> 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 ToShmem for QueryFeatureExpressionKind

fn to_shmem(&self, builder: &mut SharedMemoryBuilder) -> Result<Self>

Clones this value into a form suitable for writing into a SharedMemoryBuilder.

impl StructuralPartialEq for QueryFeatureExpressionKind