Struct BumpBox 

pub struct BumpBox<'a, T> { /* private fields */ }

An arena-allocated box that retains a reference to its [Bump] allocator, enabling Clone support.

Unlike [bumpalo::boxed::Box], which only stores a mutable reference to the allocated value (and thus cannot implement Clone without the allocator), BumpBox stores both the allocator reference and the value pointer. This allows it to allocate a new copy during Clone::clone.

This type is intended for recursive AST nodes (e.g. color-mix() containing nested <color> values) where indirection is required to break the cycle, but the allocation should still live in the parsing arena.

Implementations

impl<'a, T> BumpBox<'a, T>

pub fn new_in(bump: &'a Bump, value: T) -> Self

Allocates a new value in the given bump allocator.

Trait Implementations

impl<T: Clone> Clone for BumpBox<'_, T>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for BumpBox<'_, T>

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

Formats the value using the given formatter.

impl<T> Deref for BumpBox<'_, T>

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &T

Dereferences the value.

impl<T> DerefMut for BumpBox<'_, T>

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

Mutably dereferences the value.

impl<T: Hash> Hash for BumpBox<'_, T>

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<M: NodeMetadata, T: NodeWithMetadata<M>> NodeWithMetadata<M> for BumpBox<'_, T>

fn self_metadata(&self) -> M

Returns the metadata contributed by this node itself, not including children. Most nodes don’t contribute metadata, so can simply return M::default(). Nodes like StyleRule or AtRules should return their own node kind flags here.

fn metadata(&self) -> M

Returns the complete aggregated metadata for this node (self + children). Default implementation merges children’s metadata with self_metadata().

impl<T: Ord> Ord for BumpBox<'_, T>

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

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

where Self: Sized,

Compares and returns the maximum of two values.

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

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<'a, T: Parse<'a>> Parse<'a> for BumpBox<'a, T>

fn parse<I>(p: &mut Parser<'a, I>) -> Result<Self>

where I: Iterator<Item = Cursor> + Clone,

fn try_parse<I>(p: &mut Parser<'a, I>) -> Result<Self>

where I: Iterator<Item = Cursor> + Clone,

impl<T: PartialEq> PartialEq for BumpBox<'_, T>

fn eq(&self, other: &Self) -> 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<T: PartialOrd> PartialOrd for BumpBox<'_, T>

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<'a, T: Peek<'a>> Peek<'a> for BumpBox<'a, T>

const PEEK_KINDSET: KindSet = T::PEEK_KINDSET

fn peek<I>(p: &Parser<'a, I>, c: Cursor) -> bool

where I: Iterator<Item = Cursor> + Clone,

impl<T: SemanticEq> SemanticEq for BumpBox<'_, T>

fn semantic_eq(&self, other: &Self) -> bool

Returns true if self and other are semantically equal.

impl<T: Serialize> Serialize for BumpBox<'_, T>

Available on crate feature serde only.

fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.

impl<T: ToCursors> ToCursors for BumpBox<'_, T>

fn to_cursors(&self, s: &mut impl CursorSink)

impl<T: ToSpan> ToSpan for BumpBox<'_, T>

fn to_span(&self) -> Span

impl<T: Eq> Eq for BumpBox<'_, T>