Struct ThinArcOrInt 

pub struct ThinArcOrInt<H, T> { /* private fields */ }

A type representing either a signed pointer-sized integer (isize) or a reference-counted pointer (ThinArc<H, T>).

Optimized using NonNull so that Option<ThinArcOrInt<H, T>> takes up exactly the size of a single architecture pointer.

Implementations

impl<H, T> ThinArcOrInt<H, T>

pub fn from_isize(val: IsizeInPtr) -> Self

Constructs an instance from a signed integer that will be stored as a tagged value inside this pointer.

pub fn from_arc(arc: ThinArc<H, T>) -> Self

Constructs an instance from a ThinArc pointer. (Assumes the pointer is aligned and its LSB is 0.)

pub fn from_convertible<U, E>(value: U, slice: &[T]) -> Self

where U: TryInto<IsizeInPtr, Error = E> + Into<H>, E: Into<H>, T: Copy,

If slice is empty, tries to convert a value using try_into() to IsizeInPtr. If it succeeds, stores it as a tagged integer inside this pointer. Otherwise constructs a ThinArc to hold everything.

pub fn has_number(&self) -> bool

Returns true iff this instance holds a number as a tagged value inside this pointer, that is, without any memory allocation.

pub fn has_ref(&self) -> bool

Returns true iff this instance holds real pointer to a ThinArc<H, T> value.

pub fn as_isize(&self) -> Option<isize>

Returns the tagged integer value inside this pointer if present, or None otherwise.

pub fn as_arc(&self) -> Option<&ThinArc<H, T>>

Returns a shared reference to a ThinArc<H, T> if present, or None otherwise.

Trait Implementations

impl<H, T> Clone for ThinArcOrInt<H, T>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<H: Debug, T: Debug> Debug for ThinArcOrInt<H, T>

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

Formats the value using the given formatter.

impl<H, T> Default for ThinArcOrInt<H, T>

fn default() -> Self

Returns the “default value” for a type.

impl<H, T> Drop for ThinArcOrInt<H, T>

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.

impl<H, T> Eq for ThinArcOrInt<H, T>

where H: Eq, T: Eq,

impl<H, T> Hash for ThinArcOrInt<H, T>

where H: Hash, T: Hash,

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

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<H, T> Ord for ThinArcOrInt<H, T>

where H: Ord, T: Ord,

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<H, T> PartialEq for ThinArcOrInt<H, T>

where H: PartialEq, T: PartialEq,

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<H, T> PartialOrd for ThinArcOrInt<H, T>

where H: PartialOrd, T: PartialOrd,

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<H, T> Send for ThinArcOrInt<H, T>

where ThinArc<H, T>: Send,

impl<H, T> Sync for ThinArcOrInt<H, T>

where ThinArc<H, T>: Sync,