Enum rustc_ty_utils::representability::Representability

pub enum Representability {
    Representable,
    ContainsRecursive,
    SelfRecursive(Vec<(Span, Option<HirId>)>),
}

Describes whether a type is representable. For types that are not representable, ‘SelfRecursive’ and ‘ContainsRecursive’ are used to distinguish between types that are recursive with themselves and types that contain a different recursive type. These cases can therefore be treated differently when reporting errors.

The ordering of the cases is significant. They are sorted so that cmp::max will keep the “more erroneous” of two values.

Variants

Representable

ContainsRecursive

SelfRecursive(Vec<(Span, Option<HirId>)>)

Return a list of types that are included in themselves: the spans where they are self-included, and (if found) the HirId of the FieldDef that defines the self-inclusion.

Trait Implementations

impl Clone for Representability

fn clone(&self) -> Representability

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Representability

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

Formats the value using the given formatter.

impl Ord for Representability

fn cmp(&self, other: &Representability) -> 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) -> Selfwhere
    Self: PartialOrd<Self>,

Restrict a value to a certain interval.

impl PartialEq<Representability> for Representability

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

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

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

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd<Representability> for Representability

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

impl StructuralEq for Representability

impl StructuralPartialEq for Representability

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: 32 bytes

Size for each variant:

• Representable: 0 bytes
• ContainsRecursive: 0 bytes
• SelfRecursive: 24 bytes