Struct style::values::specified::box_::WillChangeBits

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#[repr(C)]
pub struct WillChangeBits(u16);
Expand description

The change bits that we care about.

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§0: u16

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impl WillChangeBits

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pub const STACKING_CONTEXT_UNCONDITIONAL: Self = _

Whether a property which can create a stacking context on any box will change.

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pub const TRANSFORM: Self = _

Whether transform or related properties will change.

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pub const SCROLL: Self = _

Whether scroll-position will change.

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pub const CONTAIN: Self = _

Whether contain will change.

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pub const OPACITY: Self = _

Whether opacity will change.

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pub const PERSPECTIVE: Self = _

Whether perspective will change.

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pub const Z_INDEX: Self = _

Whether z-index will change.

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pub const FIXPOS_CB_NON_SVG: Self = _

Whether any property which creates a containing block for non-svg text frames will change.

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pub const POSITION: Self = _

Whether the position property will change.

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impl WillChangeBits

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pub const fn empty() -> Self

Get a flags value with all bits unset.

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pub const fn all() -> Self

Get a flags value with all known bits set.

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pub const fn bits(&self) -> u16

Get the underlying bits value.

The returned value is exactly the bits set in this flags value.

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pub const fn from_bits(bits: u16) -> Option<Self>

Convert from a bits value.

This method will return None if any unknown bits are set.

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pub const fn from_bits_truncate(bits: u16) -> Self

Convert from a bits value, unsetting any unknown bits.

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pub const fn from_bits_retain(bits: u16) -> Self

Convert from a bits value exactly.

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pub fn from_name(name: &str) -> Option<Self>

Get a flags value with the bits of a flag with the given name set.

This method will return None if name is empty or doesn’t correspond to any named flag.

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pub const fn is_empty(&self) -> bool

Whether all bits in this flags value are unset.

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pub const fn is_all(&self) -> bool

Whether all known bits in this flags value are set.

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pub const fn intersects(&self, other: Self) -> bool

Whether any set bits in a source flags value are also set in a target flags value.

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pub const fn contains(&self, other: Self) -> bool

Whether all set bits in a source flags value are also set in a target flags value.

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pub fn insert(&mut self, other: Self)

The bitwise or (|) of the bits in two flags values.

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pub fn remove(&mut self, other: Self)

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. remove won’t truncate other, but the ! operator will.

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pub fn toggle(&mut self, other: Self)

The bitwise exclusive-or (^) of the bits in two flags values.

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pub fn set(&mut self, other: Self, value: bool)

Call insert when value is true or remove when value is false.

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pub const fn intersection(self, other: Self) -> Self

The bitwise and (&) of the bits in two flags values.

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pub const fn union(self, other: Self) -> Self

The bitwise or (|) of the bits in two flags values.

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pub const fn difference(self, other: Self) -> Self

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

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pub const fn symmetric_difference(self, other: Self) -> Self

The bitwise exclusive-or (^) of the bits in two flags values.

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pub const fn complement(self) -> Self

The bitwise negation (!) of the bits in a flags value, truncating the result.

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impl WillChangeBits

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pub const fn iter(&self) -> Iter<WillChangeBits>

Yield a set of contained flags values.

Each yielded flags value will correspond to a defined named flag. Any unknown bits will be yielded together as a final flags value.

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pub const fn iter_names(&self) -> IterNames<WillChangeBits>

Yield a set of contained named flags values.

This method is like iter, except only yields bits in contained named flags. Any unknown bits, or bits not corresponding to a contained flag will not be yielded.

Trait Implementations§

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impl Binary for WillChangeBits

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

Formats the value using the given formatter. Read more
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impl BitAnd for WillChangeBits

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fn bitand(self, other: Self) -> Self

The bitwise and (&) of the bits in two flags values.

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type Output = WillChangeBits

The resulting type after applying the & operator.
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impl BitAndAssign for WillChangeBits

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fn bitand_assign(&mut self, other: Self)

The bitwise and (&) of the bits in two flags values.

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impl BitOr for WillChangeBits

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fn bitor(self, other: WillChangeBits) -> Self

The bitwise or (|) of the bits in two flags values.

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type Output = WillChangeBits

The resulting type after applying the | operator.
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impl BitOrAssign for WillChangeBits

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fn bitor_assign(&mut self, other: Self)

The bitwise or (|) of the bits in two flags values.

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impl BitXor for WillChangeBits

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fn bitxor(self, other: Self) -> Self

The bitwise exclusive-or (^) of the bits in two flags values.

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type Output = WillChangeBits

The resulting type after applying the ^ operator.
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impl BitXorAssign for WillChangeBits

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fn bitxor_assign(&mut self, other: Self)

The bitwise exclusive-or (^) of the bits in two flags values.

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impl Clone for WillChangeBits

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fn clone(&self) -> WillChangeBits

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for WillChangeBits

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

Formats the value using the given formatter. Read more
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impl Default for WillChangeBits

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fn default() -> WillChangeBits

Returns the “default value” for a type. Read more
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impl Extend<WillChangeBits> for WillChangeBits

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fn extend<T: IntoIterator<Item = Self>>(&mut self, iterator: T)

The bitwise or (|) of the bits in each flags value.

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fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)
Extends a collection with exactly one element.
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fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (extend_one)
Reserves capacity in a collection for the given number of additional elements. Read more
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impl Flags for WillChangeBits

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const FLAGS: &'static [Flag<WillChangeBits>] = _

The set of defined flags.
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type Bits = u16

The underlying bits type.
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fn bits(&self) -> u16

Get the underlying bits value. Read more
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fn from_bits_retain(bits: u16) -> WillChangeBits

Convert from a bits value exactly.
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fn empty() -> Self

Get a flags value with all bits unset.
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fn all() -> Self

Get a flags value with all known bits set.
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fn from_bits(bits: Self::Bits) -> Option<Self>

Convert from a bits value. Read more
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fn from_bits_truncate(bits: Self::Bits) -> Self

Convert from a bits value, unsetting any unknown bits.
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fn from_name(name: &str) -> Option<Self>

Get a flags value with the bits of a flag with the given name set. Read more
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fn iter(&self) -> Iter<Self>

Yield a set of contained flags values. Read more
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fn iter_names(&self) -> IterNames<Self>

Yield a set of contained named flags values. Read more
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fn is_empty(&self) -> bool

Whether all bits in this flags value are unset.
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fn is_all(&self) -> bool

Whether all known bits in this flags value are set.
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fn intersects(&self, other: Self) -> bool
where Self: Sized,

Whether any set bits in a source flags value are also set in a target flags value.
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fn contains(&self, other: Self) -> bool
where Self: Sized,

Whether all set bits in a source flags value are also set in a target flags value.
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fn insert(&mut self, other: Self)
where Self: Sized,

The bitwise or (|) of the bits in two flags values.
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fn remove(&mut self, other: Self)
where Self: Sized,

The intersection of a source flags value with the complement of a target flags value (&!). Read more
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fn toggle(&mut self, other: Self)
where Self: Sized,

The bitwise exclusive-or (^) of the bits in two flags values.
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fn set(&mut self, other: Self, value: bool)
where Self: Sized,

Call Flags::insert when value is true or Flags::remove when value is false.
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fn intersection(self, other: Self) -> Self

The bitwise and (&) of the bits in two flags values.
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fn union(self, other: Self) -> Self

The bitwise or (|) of the bits in two flags values.
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fn difference(self, other: Self) -> Self

The intersection of a source flags value with the complement of a target flags value (&!). Read more
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fn symmetric_difference(self, other: Self) -> Self

The bitwise exclusive-or (^) of the bits in two flags values.
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fn complement(self) -> Self

The bitwise negation (!) of the bits in a flags value, truncating the result.
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impl FromIterator<WillChangeBits> for WillChangeBits

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fn from_iter<T: IntoIterator<Item = Self>>(iterator: T) -> Self

The bitwise or (|) of the bits in each flags value.

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impl IntoIterator for WillChangeBits

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type Item = WillChangeBits

The type of the elements being iterated over.
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type IntoIter = Iter<WillChangeBits>

Which kind of iterator are we turning this into?
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fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value. Read more
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impl LowerHex for WillChangeBits

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

Formats the value using the given formatter. Read more
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impl MallocSizeOf for WillChangeBits

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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.
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impl Not for WillChangeBits

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fn not(self) -> Self

The bitwise negation (!) of the bits in a flags value, truncating the result.

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type Output = WillChangeBits

The resulting type after applying the ! operator.
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impl Octal for WillChangeBits

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

Formats the value using the given formatter. Read more
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impl PartialEq for WillChangeBits

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fn eq(&self, other: &WillChangeBits) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl SpecifiedValueInfo for WillChangeBits

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const SUPPORTED_TYPES: u8 = 0u8

Supported CssTypes by the given value type. Read more
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fn collect_completion_keywords(_f: &mut dyn FnMut(&[&'static str]))

Collect value starting words for the given specified value type. This includes keyword and function names which can appear at the beginning of a value of this type. Read more
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impl Sub for WillChangeBits

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fn sub(self, other: Self) -> Self

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

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type Output = WillChangeBits

The resulting type after applying the - operator.
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impl SubAssign for WillChangeBits

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fn sub_assign(&mut self, other: Self)

The intersection of a source flags value with the complement of a target flags value (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

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impl ToComputedValue for WillChangeBits
where u16: ToComputedValue<ComputedValue = u16>,

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type ComputedValue = WillChangeBits

The computed value type we’re going to be converted to.
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fn from_computed_value(from: &Self::ComputedValue) -> Self

Convert a computed value to specified value form. Read more
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fn to_computed_value(&self, context: &Context<'_>) -> Self::ComputedValue

Convert a specified value to a computed value, using itself and the data inside the Context.
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impl ToResolvedValue for WillChangeBits
where u16: ToResolvedValue<ResolvedValue = u16>,

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type ResolvedValue = WillChangeBits

The resolved value type we’re going to be converted to.
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fn from_resolved_value(from: Self::ResolvedValue) -> Self

Convert a resolved value to resolved value form.
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fn to_resolved_value(self, context: &Context<'_>) -> Self::ResolvedValue

Convert a resolved value to a resolved value.
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impl ToShmem for WillChangeBits

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

Clones this value into a form suitable for writing into a SharedMemoryBuilder. Read more
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impl UpperHex for WillChangeBits

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

Formats the value using the given formatter. Read more
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impl Copy for WillChangeBits

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impl Eq for WillChangeBits

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impl StructuralPartialEq for WillChangeBits

Auto Trait Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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Gets the TypeId of self. Read more
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where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<Q, K> Equivalent<K> for Q
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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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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 more
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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 more
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impl<T> MaybeBoxed<Box<T>> for T

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Convert
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impl<T> MaybeBoxed<T> for T

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Convert
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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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where T: Clone,

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Performs the conversion.
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