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,
},
}
Expand description
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
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.
A keyword value.
Auto Trait Implementations§
impl RefUnwindSafe for Evaluator
impl Send for Evaluator
impl Sync for Evaluator
impl Unpin for Evaluator
impl UnwindSafe for Evaluator
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
Converts
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>where
F: FnOnce(&Self) -> bool,
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>where F: FnOnce(&Self) -> bool,
Converts
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§impl<T> MaybeBoxed<Box<T, Global>> for T
impl<T> MaybeBoxed<Box<T, Global>> for T
source§fn maybe_boxed(self) -> Box<T, Global>
fn maybe_boxed(self) -> Box<T, Global>
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source§impl<T> MaybeBoxed<T> for T
impl<T> MaybeBoxed<T> for T
source§fn maybe_boxed(self) -> T
fn maybe_boxed(self) -> T
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