Type Definition rustc_middle::ty::subst::SubstsRef

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pub type SubstsRef<'tcx> = &'tcx InternalSubsts<'tcx>;

Trait Implementations§

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impl<'tcx, D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<D> for SubstsRef<'tcx>

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

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impl<'tcx> Key for SubstsRef<'tcx>

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type CacheSelector = DefaultCacheSelector<&'tcx List<GenericArg<'tcx>>>

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fn query_crate_is_local(&self) -> bool

Given an instance of this key, what crate is it referring to? This is used to find the provider.
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fn default_span(&self, _: 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?
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fn key_as_def_id(&self) -> Option<DefId>

If the key is a DefId or DefId–equivalent, return that DefId. Otherwise, return None.
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fn ty_adt_id(&self) -> Option<DefId>

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impl<'tcx> Relate<'tcx> for SubstsRef<'tcx>

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fn relate<R: TypeRelation<'tcx>>( relation: &mut R, a: SubstsRef<'tcx>, b: SubstsRef<'tcx> ) -> RelateResult<'tcx, SubstsRef<'tcx>>

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

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fn try_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, folder: &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). Read more
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fn fold_with<F>(self, folder: &mut F) -> Selfwhere F: TypeFolder<I>,

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

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