Struct ArcIdUsize

pub struct ArcIdUsize(/* private fields */);

An atomically referenced counted version of IdUsize.

This exists primarily because it should be possible to look up Arc<IdUsize>’s by usize’s in HashMap’s. While it is possible to look up Id’s in HashMap’s using &usize’s, it doesn’t work for Arc<IdUsize>’s. To workaround this limitation this ArcIdUsize newtype implements Borrow<usize>, which passes it through the Arc to it’s inner IdUsize.

Implementations

impl ArcIdUsize

pub fn val(&self) -> usize

Return the internal identifier usize value.

pub fn try_unwrap(this: ArcIdUsize) -> Result<IdUsize, ArcIdUsize>

Returns the inner value, if the ArcId has exactly one strong reference.

Errors

If there’s more than one strong reference to the ArcIdUsize, the ArcIdUsize will be returned.

pub fn into_inner(this: ArcIdUsize) -> Option<IdUsize>

Returns the inner value, if the ArcIdUsize has exactly one strong reference.

pub fn strong_count(&self) -> usize

Return the strong count of internal Arc.

Trait Implementations

impl Borrow<usize> for ArcIdUsize

fn borrow(&self) -> &usize

Immutably borrows from an owned value.

impl Clone for ArcIdUsize

fn clone(&self) -> ArcIdUsize

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ArcIdUsize

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

Formats the value using the given formatter.

impl Hash for ArcIdUsize

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

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 ArcIdUsize

fn eq(&self, other: &ArcIdUsize) -> 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 Eq for ArcIdUsize

impl StructuralPartialEq for ArcIdUsize