Struct rustc_middle::middle::stability::Index

source ·

pub struct Index {
    pub stab_map: FxHashMap<LocalDefId, Stability>,
    pub const_stab_map: FxHashMap<LocalDefId, ConstStability>,
    pub default_body_stab_map: FxHashMap<LocalDefId, DefaultBodyStability>,
    pub depr_map: FxHashMap<LocalDefId, DeprecationEntry>,
    pub implications: FxHashMap<Symbol, Symbol>,
}

Expand description

A stability index, giving the stability level for items and methods.

Fields§

§stab_map: FxHashMap<LocalDefId, Stability>

This is mostly a cache, except the stabilities of local items are filled by the annotator.

§const_stab_map: FxHashMap<LocalDefId, ConstStability>§default_body_stab_map: FxHashMap<LocalDefId, DefaultBodyStability>§depr_map: FxHashMap<LocalDefId, DeprecationEntry>§implications: FxHashMap<Symbol, Symbol>

Mapping from feature name to feature name based on the implied_by field of #[unstable] attributes. If a #[unstable(feature = "implier", implied_by = "impliee")] attribute exists, then this map will have a impliee -> implier entry.

This mapping is necessary unless both the #[stable] and #[unstable] attributes should specify their implications (both implies and implied_by). If only one of the two attributes do (as in the current implementation, implied_by in #[unstable]), then this mapping is necessary for diagnostics. When a “unnecessary feature attribute” error is reported, only the #[stable] attribute information is available, so the map is necessary to know that the feature implies another feature. If it were reversed, and the #[stable] attribute had an implies meta item, then a map would be necessary when avoiding a “use of unstable feature” error for a feature that was implied.

Struct rustc_middle::middle::stability::Index

Fields§

Implementations§

impl Index

pub fn local_stability(&self, def_id: LocalDefId) -> Option<Stability>

pub fn local_const_stability( &self, def_id: LocalDefId ) -> Option<ConstStability>

pub fn local_default_body_stability( &self, def_id: LocalDefId ) -> Option<DefaultBodyStability>

pub fn local_deprecation_entry( &self, def_id: LocalDefId ) -> Option<DeprecationEntry>

Trait Implementations§

impl Debug for Index

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

impl<'__ctx> HashStable<StableHashingContext<'__ctx>> for Index

fn hash_stable( &self, __hcx: &mut StableHashingContext<'__ctx>, __hasher: &mut StableHasher )

Auto Trait Implementations§

impl RefUnwindSafe for Index

impl Send for Index

impl Sync for Index

impl Unpin for Index

impl UnwindSafe for Index

Blanket Implementations§

impl<T> Aligned for T

const ALIGN: Alignment = _

impl<T> Any for Twhere T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for Twhere T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Twhere T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T, R> CollectAndApply<T, R> for T

fn collect_and_apply<I, F>(iter: I, f: F) -> Rwhere I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

type Output = R

impl<Tcx, T> DepNodeParams<Tcx> for Twhere Tcx: DepContext, T: for<'a> HashStable<StableHashingContext<'a>> + Debug,

default fn fingerprint_style() -> FingerprintStyle

default fn to_fingerprint(&self, tcx: Tcx) -> Fingerprint

default fn to_debug_str(&self, _: Tcx) -> String

default fn recover(_: Tcx, _: &DepNode) -> Option<T>

impl<T> From<T> for T

fn from(t: T) -> T

impl<T, U> Into<U> for Twhere U: From<T>,

fn into(self) -> U

impl<P> IntoQueryParam<P> for P

fn into_query_param(self) -> P

impl<T> MaybeResult<T> for T

type Error = !

fn from(_: Result<T, <T as MaybeResult<T>>::Error>) -> T

fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

impl<'tcx, T> ToPredicate<'tcx, T> for T

fn to_predicate(self, _tcx: TyCtxt<'tcx>) -> T

impl<T, U> TryFrom<U> for Twhere U: Into<T>,

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<Tcx, T> Value<Tcx> for Twhere Tcx: DepContext,

default fn from_cycle_error( tcx: Tcx, cycle: &[QueryInfo], _guar: ErrorGuaranteed ) -> T

Layout§

impl<'ctx> HashStable<StableHashingContext<'ctx>> for Index

fn hash_stable( &self, hcx: &mut StableHashingContext<'ctx>, __hasher: &mut StableHasher )