Struct ConstStability

pub struct ConstStability {
    pub level: StabilityLevel,
    pub feature: Option<Symbol>,
    pub const_stable_indirect: bool,
    pub promotable: bool,
}

Represents the #[rustc_const_unstable] and #[rustc_const_stable] attributes.

Fields

level: StabilityLevel

feature: Option<Symbol>

This can be None for functions that do not have an explicit const feature. We still track them for recursive const stability checks.

const_stable_indirect: bool

This is true iff the const_stable_indirect attribute is present.

promotable: bool

whether the function has a #[rustc_promotable] attribute

Implementations

impl ConstStability

pub fn is_const_unstable(&self) -> bool

pub fn is_const_stable(&self) -> bool

Trait Implementations

impl Clone for ConstStability

fn clone(&self) -> ConstStability

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ConstStability

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

Formats the value using the given formatter.

impl<__D: SpanDecoder> Decodable<__D> for ConstStability

fn decode(__decoder: &mut __D) -> Self

impl<__E: SpanEncoder> Encodable<__E> for ConstStability

fn encode(&self, __encoder: &mut __E)

impl Hash for ConstStability

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<__CTX> HashStable<__CTX> for ConstStability

where __CTX: HashStableContext,

fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)

impl PartialEq for ConstStability

fn eq(&self, other: &ConstStability) -> 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 Copy for ConstStability

impl Eq for ConstStability

impl StructuralPartialEq for ConstStability

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: 24 bytes