Struct PackedOption

pub struct PackedOption<T: ReservedValue>(/* private fields */);

Packed representation of Option<T>.

Implementations

impl<T: ReservedValue> PackedOption<T>

pub fn is_none(&self) -> bool

Returns true if the packed option is a None value.

pub fn is_some(&self) -> bool

Returns true if the packed option is a Some value.

pub fn expand(self) -> Option<T>

Expand the packed option into a normal Option.

pub fn map<U, F>(self, f: F) -> Option<U>

where F: FnOnce(T) -> U,

Maps a PackedOption<T> to Option<U> by applying a function to a contained value.

pub fn unwrap(self) -> T

Unwrap a packed Some value or panic.

pub fn expect(self, msg: &str) -> T

Unwrap a packed Some value or panic.

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

Takes the value out of the packed option, leaving a None in its place.

Trait Implementations

impl<T: Clone + ReservedValue> Clone for PackedOption<T>

fn clone(&self) -> PackedOption<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T> Debug for PackedOption<T>

where T: ReservedValue + Debug,

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

Formats the value using the given formatter.

impl<T: ReservedValue> Default for PackedOption<T>

fn default() -> Self

Create a default packed option representing None.

impl<T: ReservedValue> From<Option<T>> for PackedOption<T>

fn from(opt: Option<T>) -> Self

Convert an option into its packed equivalent.

impl<T: ReservedValue> From<PackedOption<T>> for Option<T>

fn from(other: PackedOption<T>) -> Self

Converts to this type from the input type.

impl<T: ReservedValue> From<T> for PackedOption<T>

fn from(t: T) -> Self

Convert t into a packed Some(x).

impl<T: Hash + ReservedValue> Hash for PackedOption<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, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<T: Ord + ReservedValue> Ord for PackedOption<T>

fn cmp(&self, other: &PackedOption<T>) -> 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<T: PartialEq + ReservedValue> PartialEq for PackedOption<T>

fn eq(&self, other: &PackedOption<T>) -> 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<T: PartialOrd + ReservedValue> PartialOrd for PackedOption<T>

fn partial_cmp(&self, other: &PackedOption<T>) -> 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<T: Copy + ReservedValue> Copy for PackedOption<T>

impl<T: Eq + ReservedValue> Eq for PackedOption<T>

impl<T: ReservedValue> StructuralPartialEq for PackedOption<T>