Struct wasmtime_environ::packed_option::PackedOption

pub struct PackedOption<T>(_)
 where
    T: ReservedValue;

Packed representation of Option<T>.

Implementations

impl<T> PackedOption<T> where
    T: ReservedValue, 

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 for PackedOption<T> where
    T: Clone + ReservedValue, 

pub 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, 

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

Formats the value using the given formatter.

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

pub fn default() -> PackedOption<T>

Create a default packed option representing None.

impl<'de, T> Deserialize<'de> for PackedOption<T> where
    T: ReservedValue + Deserialize<'de>, 

pub fn deserialize<__D>(
    __deserializer: __D
) -> Result<PackedOption<T>, <__D as Deserializer<'de>>::Error> where
    __D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

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

pub fn from(opt: Option<T>) -> PackedOption<T>

Convert an option into its packed equivalent.

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

pub fn from(t: T) -> PackedOption<T>

Convert t into a packed Some(x).

impl<T> Hash for PackedOption<T> where
    T: Hash + ReservedValue, 

pub 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, 

Feeds a slice of this type into the given Hasher.

impl<T> Into<Option<T>> for PackedOption<T> where
    T: ReservedValue, 

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

Performs the conversion.

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

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

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

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

pub fn ne(&self, other: &PackedOption<T>) -> bool

This method tests for !=.

impl<T> PartialOrd<PackedOption<T>> for PackedOption<T> where
    T: PartialOrd<T> + ReservedValue, 

pub 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

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> Serialize for PackedOption<T> where
    T: ReservedValue + Serialize, 

pub fn serialize<__S>(
    &self,
    __serializer: __S
) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error> where
    __S: Serializer, 

Serialize this value into the given Serde serializer.

impl<T> Copy for PackedOption<T> where
    T: Copy + ReservedValue, 

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

impl<T> StructuralEq for PackedOption<T> where
    T: ReservedValue, 

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