Type Alias rustc_middle::query::queries::constness::Key

pub type Key<'tcx> = DefId;

Aliased Type

struct Key<'tcx> {
    pub index: DefIndex,
    pub krate: CrateNum,
}

Fields

index: DefIndex

krate: CrateNum

Trait Implementations

impl AsLocalKey for DefId

type LocalKey = LocalDefId

fn as_local_key(&self) -> Option<Self::LocalKey>

Given an instance of this key, what crate is it referring to? This is used to find the provider.

impl<'a, 'tcx> Decodable<CacheDecoder<'a, 'tcx>> for DefId

fn decode(d: &mut CacheDecoder<'a, 'tcx>) -> Self

impl<'tcx> DepNodeParams<TyCtxt<'tcx>> for DefId

fn fingerprint_style() -> FingerprintStyle

fn to_fingerprint(&self, tcx: TyCtxt<'tcx>) -> Fingerprint

This method turns the parameters of a DepNodeConstructor into an opaque Fingerprint to be used in DepNode. Not all DepNodeParams support being turned into a Fingerprint (they don’t need to if the corresponding DepNode is anonymous).

fn to_debug_str(&self, tcx: TyCtxt<'tcx>) -> String

fn recover(tcx: TyCtxt<'tcx>, dep_node: &DepNode) -> Option<Self>

This method tries to recover the query key from the given DepNode, something which is needed when forcing DepNodes during red-green evaluation. The query system will only call this method if fingerprint_style() is not FingerprintStyle::Opaque. It is always valid to return None here, in which case incremental compilation will treat the query as having changed instead of forcing it.

impl<'a, 'tcx> Encodable<CacheEncoder<'a, 'tcx>> for DefId

fn encode(&self, s: &mut CacheEncoder<'a, 'tcx>)

impl EraseType for DefId

type Result = [u8; 8]

impl Key for DefId

type CacheSelector = DefaultCacheSelector<DefId>

fn default_span(&self, tcx: TyCtxt<'_>) -> Span

In the event that a cycle occurs, if no explicit span has been given for a query with key self, what span should we use?

fn key_as_def_id(&self) -> Option<DefId>

If the key is a DefId or DefId–equivalent, return that DefId. Otherwise, return None.

fn ty_adt_id(&self) -> Option<DefId>

impl<'tcx> Lift<'tcx> for DefId

type Lifted = DefId

fn lift_to_tcx(self, _: TyCtxt<'tcx>) -> Option<Self>

impl ParameterizedOverTcx for DefId

type Value<'tcx> = DefId

impl<'tcx, D: TyDecoder<I = TyCtxt<'tcx>>> RefDecodable<'tcx, D> for DefId

fn decode(decoder: &mut D) -> &'tcx Self

impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for DefId

fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, _: &mut F ) -> Result<Self, F::Error>

The entry point for folding. To fold a value t with a folder f call: t.try_fold_with(f).

fn fold_with<F: TypeFolder<TyCtxt<'tcx>>>(self, _: &mut F) -> Self

A convenient alternative to try_fold_with for use with infallible folders. Do not override this method, to ensure coherence with try_fold_with.

impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for DefId

fn visit_with<F: TypeVisitor<TyCtxt<'tcx>>>( &self, _: &mut F ) -> ControlFlow<F::BreakTy>

The entry point for visiting. To visit a value t with a visitor v call: t.visit_with(v).

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