Struct WeakRegion

pub struct WeakRegion(pub Weak<RegionData>);

A weak handle on a region

Tuple Fields

0: Weak<RegionData>

Implementations

impl WeakRegion

pub fn upgrade(&self) -> Option<Region>

Attempt to upgrade a region to a strong reference

pub fn is_null(&self) -> bool

Check whether a weak region is null

pub fn outer<'a>(&'a self, other: &'a WeakRegion) -> Option<&'a WeakRegion>

Get the outer region of nested regions, if either is

pub fn inner<'a>(&'a self, other: &'a WeakRegion) -> Option<&'a WeakRegion>

Get the inner region of nested regions, if either is

pub fn innermost<'a, I>( &'a self, regions: I, ) -> Result<&'a WeakRegion, (&'a WeakRegion, &'a WeakRegion)>

where I: Iterator<Item = &'a WeakRegion>,

Get the innermost region of a list of nested regions, assuming all are comparable. Return an error if not.

Trait Implementations

impl Clone for WeakRegion

fn clone(&self) -> WeakRegion

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WeakRegion

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

Formats the value using the given formatter.

impl Default for WeakRegion

fn default() -> WeakRegion

Returns the “default value” for a type.

impl Hash for WeakRegion

fn hash<H: Hasher>(&self, hasher: &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 PartialEq<Region> for WeakRegion

fn eq(&self, other: &Region) -> 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 PartialEq<WeakRegion> for Region

fn eq(&self, other: &WeakRegion) -> 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 PartialEq for WeakRegion

fn eq(&self, other: &WeakRegion) -> 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 PartialOrd<Region> for WeakRegion

fn partial_cmp(&self, other: &Region) -> 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 PartialOrd<WeakRegion> for Region

fn partial_cmp(&self, other: &WeakRegion) -> 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 PartialOrd for WeakRegion

fn partial_cmp(&self, other: &WeakRegion) -> 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 Eq for WeakRegion