Enum rkyv::core_impl::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 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 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.

Trait Implementations

impl<C: ?Sized, T: CheckBytes<C>> CheckBytes<C> for ArchivedOption<T>

type Error = ArchivedOptionError<T::Error>

The error that may result from checking the type.

unsafe fn check_bytes<'a>(
    value: *const Self,
    context: &mut C
) -> Result<&'a Self, Self::Error>

Checks whether the given pointer points to a valid value within the given context.

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

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

Formats the value using the given formatter.

impl<T: Eq> Eq for ArchivedOption<T>

impl<T: Hash> Hash for ArchivedOption<T>

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

Feeds this value into the given Hasher.

pub 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.

#[must_use]

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

Compares and returns the maximum of two values.

#[must_use]

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

Compares and returns the minimum of two values.

#[must_use]

pub 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 ==.

#[must_use]

pub 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 ==.

#[must_use]

pub 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.

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

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

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

#[must_use]

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

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