Struct ObjCell

#[repr(transparent)]
pub(crate) struct ObjCell(Cell<Gc<ObjectType<'static>>>);

This type represents and immutable view into an Object. The reason we have an additional type is because there could be other references to this same cell that can change the underlying data, so this is wrapper around std::cell::Cell type. It is not valid to mutate the data under a reference unless it is inside an Unsafe Cell. However because this struct could also be used in an immutable data structure (function constants), we need to ensure that this cell cannot be mutated by default. This type is not safe to be copy or clone.

Tuple Fields

0: Cell<Gc<ObjectType<'static>>>

Implementations

impl ObjCell

pub(crate) fn get(&self) -> Gc<ObjectType<'_>>

pub(in core) unsafe fn new( obj: Gc<ObjectType<'_>>, ) -> Self

pub(in core) unsafe fn as_mut( &self, ) -> &MutObjCell

Casts to a MutObjCell. Caller must ensure that the data structure is mutable.

Trait Implementations

impl Hash for ObjCell

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 PartialEq for ObjCell

fn eq(&self, other: &ObjCell) -> 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 Trace for ObjCell

fn trace(&self, state: &mut GcState)

impl Debug for ObjCell

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

Formats the value using the given formatter.

impl Display for ObjCell

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

Formats the value using the given formatter.

impl Eq for ObjCell

impl StructuralPartialEq for ObjCell