Enum style::queries::feature::Evaluator

pub enum Evaluator {
    Length(fn(device: &Context<'_>) -> CSSPixelLength),
    OptionalLength(fn(device: &Context<'_>) -> Option<CSSPixelLength>),
    Integer(fn(device: &Context<'_>) -> i32),
    Float(fn(device: &Context<'_>) -> f32),
    BoolInteger(fn(device: &Context<'_>) -> bool),
    NumberRatio(fn(device: &Context<'_>) -> Ratio),
    OptionalNumberRatio(fn(device: &Context<'_>) -> Option<Ratio>),
    Resolution(fn(device: &Context<'_>) -> Resolution),
    String(fn(_: &Context<'_>, _: Option<&AtomString>) -> KleeneValue),
    Enumerated {
        parser: KeywordParser,
        serializer: KeywordSerializer,
        evaluator: fn(_: &Context<'_>, _: Option<KeywordDiscriminant>) -> KleeneValue,
    },
}

An evaluator for a given feature.

This determines the kind of values that get parsed, too.

Variants

Length(fn(device: &Context<'_>) -> CSSPixelLength)

OptionalLength(fn(device: &Context<'_>) -> Option<CSSPixelLength>)

Integer(fn(device: &Context<'_>) -> i32)

Float(fn(device: &Context<'_>) -> f32)

BoolInteger(fn(device: &Context<'_>) -> bool)

NumberRatio(fn(device: &Context<'_>) -> Ratio)

A non-negative number ratio, such as the one from device-pixel-ratio.

OptionalNumberRatio(fn(device: &Context<'_>) -> Option<Ratio>)

Resolution(fn(device: &Context<'_>) -> Resolution)

A resolution.

String(fn(_: &Context<'_>, _: Option<&AtomString>) -> KleeneValue)

Enumerated

A keyword value.

Fields

parser: KeywordParser

The parser to get a discriminant given a string.

serializer: KeywordSerializer

The serializer to get a string from a discriminant.

This is guaranteed to be called with a keyword that parser has produced.

evaluator: fn(_: &Context<'_>, _: Option<KeywordDiscriminant>) -> KleeneValue

The evaluator itself. This is guaranteed to be called with a keyword that parser has produced.