Enum rkyv::option::ArchivedOption

#[repr(u8)]
pub enum ArchivedOption<T> {
    None,
    Some(T),
}

An archived Option.

It functions identically to Option but has a different internal representation to allow for archiving.

Variants

None

No value

Some(T)

Some value T

Implementations

impl<T> ArchivedOption<T>

pub fn is_none(&self) -> bool

Returns true if the option is a None value.

pub fn is_some(&self) -> bool

Returns true if the option is a Some value.

pub const fn as_ref(&self) -> Option<&T>

Converts to an Option<&T>.

pub fn as_mut(&mut self) -> Option<&mut T>

Converts to an Option<&mut T>.

pub fn as_pin_ref(self: Pin<&Self>) -> Option<Pin<&T>>

Converts from Pin<&ArchivedOption<T>> to Option<Pin<&T>>.

pub fn as_pin_mut(self: Pin<&mut Self>) -> Option<Pin<&mut T>>

Converts from Pin<&mut ArchivedOption<T>> to Option<Pin<&mut T>>.

pub const fn iter(&self) -> Iter<'_, T>

Returns an iterator over the possibly contained value.

pub fn iter_mut(&mut self) -> IterMut<'_, T>

Returns a mutable iterator over the possibly contained value.

pub fn get_or_insert(&mut self, v: T) -> &mut T

Inserts v into the option if it is None, then returns a mutable reference to the contained value.

pub fn get_or_insert_with<F: FnOnce() -> T>(&mut self, f: F) -> &mut T

Inserts a value computed from f into the option if it is None, then returns a mutable reference to the contained value.

impl<T: Deref> ArchivedOption<T>

pub fn as_deref(&self) -> Option<&<T as Deref>::Target>

Converts from &ArchivedOption<T> to Option<&T::Target>.

Leaves the original ArchivedOption in-place, creating a new one with a reference to the original one, additionally coercing the contents via Deref.

impl<T: DerefMut> ArchivedOption<T>

pub fn as_deref_mut(&mut self) -> Option<&mut <T as Deref>::Target>

Converts from &mut ArchivedOption<T> to Option<&mut T::Target>.

Leaves the original ArchivedOption in-place, creating a new Option with a mutable reference to the inner type’s Deref::Target type.

Trait Implementations

impl<T: Debug> Debug for ArchivedOption<T>

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

Formats the value using the given formatter.

impl<T: Archive, D: Fallible + ?Sized> Deserialize<Option<T>, D> for ArchivedOption<T::Archived> where
    T::Archived: Deserialize<T, D>, 

fn deserialize(&self, deserializer: &mut D) -> Result<Option<T>, D::Error>

Deserializes using the given deserializer

impl<T: Hash> Hash for ArchivedOption<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, 

Feeds a slice of this type into the given Hasher.

impl<T: Ord> Ord for ArchivedOption<T>

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

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

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

Restrict a value to a certain interval.

impl<T: PartialEq> PartialEq<ArchivedOption<T>> for ArchivedOption<T>

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl<T: PartialEq<U>, U> PartialEq<ArchivedOption<T>> for Option<U>

fn eq(&self, other: &ArchivedOption<T>) -> bool

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl<T, U: PartialEq<T>> PartialEq<Option<T>> for ArchivedOption<U>

fn eq(&self, other: &Option<T>) -> bool

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl<T: PartialOrd> PartialOrd<ArchivedOption<T>> for ArchivedOption<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

This method tests less than (for self and other) and is used by the < operator.

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

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

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

This method tests greater than (for self and other) and is used by the > operator.

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

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

impl<T: Eq> Eq for ArchivedOption<T>