Enum Representative

pub(crate) enum Representative {
    FreeRegion(RegionVid),
    Placeholder(RegionVid),
    Existential(RegionVid),
}

The representative region variable for an SCC, tagged by its origin. We prefer placeholders over existentially quantified variables, otherwise it’s the one with the smallest Region Variable ID. In other words, the order of this enumeration really matters!

Variants

FreeRegion(RegionVid)

Placeholder(RegionVid)

Existential(RegionVid)

Implementations

impl Representative

pub(crate) fn rvid(self) -> RegionVid

pub(crate) fn new(r: RegionVid, definition: &RegionDefinition<'_>) -> Self

Trait Implementations

impl Annotation for Representative

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

Merge two existing annotations into one during path compression.o

fn merge_reached(self, _other: Self) -> Self

Merge a successor into this annotation.

fn update_scc(&mut self, other: Self)

fn update_reachable(&mut self, other: Self)

impl Clone for Representative

fn clone(&self) -> Representative

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Representative

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

Formats the value using the given formatter.

impl Ord for Representative

fn cmp(&self, other: &Representative) -> 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 PartialEq for Representative

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

Tests for self and other values to be equal, and is used by ==.

const 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 for Representative

fn partial_cmp(&self, other: &Representative) -> 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 Copy for Representative

impl Eq for Representative

impl StructuralPartialEq for Representative

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 8 bytes

Size for each variant:

• FreeRegion: 4 bytes
• Placeholder: 4 bytes
• Existential: 4 bytes