rustc_middle::ty::lift

Trait Lift

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pub trait Lift<I>: Debug {
    type Lifted: Debug;

    // Required method
    fn lift_to_interner(self, cx: I) -> Option<Self::Lifted>;
}
Expand description

A trait implemented for all X<'a> types that can be safely and efficiently converted to X<'tcx> as long as they are part of the provided TyCtxt<'tcx>. This can be done, for example, for Ty<'tcx> or GenericArgsRef<'tcx> by looking them up in their respective interners.

However, this is still not the best implementation as it does need to compare the components, even for interned values. It would be more efficient if TypedArena provided a way to determine whether the address is in the allocated range.

None is returned if the value or one of the components is not part of the provided context. For Ty, None can be returned if either the type interner doesn’t contain the TyKind key or if the address of the interned pointer differs. The latter case is possible if a primitive type, e.g., () or u8, was interned in a different context.

Required Associated Types§

Required Methods§

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fn lift_to_interner(self, cx: I) -> Option<Self::Lifted>

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impl<'a, 'tcx> Lift<TyCtxt<'tcx>> for &'a [ValTree<'a>]

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type Lifted = &'tcx [ValTree<'tcx>]

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fn lift_to_interner(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted>

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impl<'a, 'tcx> Lift<TyCtxt<'tcx>> for Layout<'a>

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type Lifted = Layout<'tcx>

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fn lift_to_interner(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted>

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impl<'tcx> Lift<TyCtxt<'tcx>> for ExternAbi

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impl<'tcx> Lift<TyCtxt<'tcx>> for Safety

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type Lifted = Safety

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

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impl<'tcx> Lift<TyCtxt<'tcx>> for bool

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type Lifted = bool

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

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impl<'tcx> Lift<TyCtxt<'tcx>> for u64

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type Lifted = u64

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

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impl<'tcx> Lift<TyCtxt<'tcx>> for ()

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type Lifted = ()

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

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impl<'tcx> Lift<TyCtxt<'tcx>> for usize

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type Lifted = usize

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

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impl<'tcx> Lift<TyCtxt<'tcx>> for Size

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type Lifted = Size

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

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

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type Lifted = DefId

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

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impl<'tcx, T: Lift<TyCtxt<'tcx>>> Lift<TyCtxt<'tcx>> for Option<T>

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type Lifted = Option<<T as Lift<TyCtxt<'tcx>>>::Lifted>

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fn lift_to_interner(self, tcx: TyCtxt<'tcx>) -> Option<Self::Lifted>

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impl<'a, 'tcx> Lift<TyCtxt<'tcx>> for &'a List<BoundVariableKind>

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impl<'a, 'tcx> Lift<TyCtxt<'tcx>> for &'a List<GenericArg<'a>>

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type Lifted = &'tcx RawList<(), GenericArg<'tcx>>

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impl<'a, 'tcx> Lift<TyCtxt<'tcx>> for &'a List<Ty<'a>>

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type Lifted = &'tcx RawList<(), Ty<'tcx>>

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impl<'a, 'tcx> Lift<TyCtxt<'tcx>> for &'a List<PolyExistentialPredicate<'a>>

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impl<'a, 'tcx> Lift<TyCtxt<'tcx>> for ConstAllocation<'a>

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impl<'a, 'tcx> Lift<TyCtxt<'tcx>> for rustc_middle::ty::consts::Const<'a>

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type Lifted = Const<'tcx>

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impl<'a, 'tcx> Lift<TyCtxt<'tcx>> for GenericArg<'a>

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impl<'a, 'tcx> Lift<TyCtxt<'tcx>> for Pattern<'a>

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type Lifted = Pattern<'tcx>

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impl<'a, 'tcx> Lift<TyCtxt<'tcx>> for Clause<'a>

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type Lifted = Clause<'tcx>

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impl<'a, 'tcx> Lift<TyCtxt<'tcx>> for Predicate<'a>

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impl<'a, 'tcx> Lift<TyCtxt<'tcx>> for Region<'a>

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type Lifted = Region<'tcx>

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impl<'a, 'tcx> Lift<TyCtxt<'tcx>> for Term<'a>

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type Lifted = Term<'tcx>

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impl<'a, 'tcx> Lift<TyCtxt<'tcx>> for Ty<'a>

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type Lifted = Ty<'tcx>

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impl<'tcx> Lift<TyCtxt<'tcx>> for Scalar

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impl<'tcx> Lift<TyCtxt<'tcx>> for IsConstable

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impl<'tcx> Lift<TyCtxt<'tcx>> for BoundConstness

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impl<'tcx> Lift<TyCtxt<'tcx>> for ClosureKind

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impl<'tcx> Lift<TyCtxt<'tcx>> for ImplPolarity

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impl<'tcx> Lift<TyCtxt<'tcx>> for PredicatePolarity

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impl<'tcx> Lift<TyCtxt<'tcx>> for ReifyReason

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impl<'tcx> Lift<TyCtxt<'tcx>> for CtfeProvenance

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impl<'tcx> Lift<TyCtxt<'tcx>> for AllocId

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impl<'tcx> Lift<TyCtxt<'tcx>> for Promoted

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impl<'tcx> Lift<TyCtxt<'tcx>> for ParamConst

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impl<'tcx> Lift<TyCtxt<'tcx>> for ParamTy

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impl<'tcx, '__lifted> Lift<TyCtxt<'__lifted>> for rustc_middle::mir::consts::Const<'tcx>

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type Lifted = Const<'__lifted>

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impl<'tcx, '__lifted> Lift<TyCtxt<'__lifted>> for ConstValue<'tcx>

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type Lifted = ConstValue<'__lifted>

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impl<'tcx, '__lifted> Lift<TyCtxt<'__lifted>> for InstanceKind<'tcx>

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type Lifted = InstanceKind<'__lifted>

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impl<'tcx, '__lifted> Lift<TyCtxt<'__lifted>> for rustc_middle::mir::consts::UnevaluatedConst<'tcx>

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impl<'tcx, '__lifted> Lift<TyCtxt<'__lifted>> for Instance<'tcx>

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type Lifted = Instance<'__lifted>

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impl<'tcx, '__lifted> Lift<TyCtxt<'__lifted>> for PrintClosureAsImpl<'tcx>

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impl<'tcx, '__lifted> Lift<TyCtxt<'__lifted>> for TraitPredPrintModifiersAndPath<'tcx>

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impl<'tcx, '__lifted> Lift<TyCtxt<'__lifted>> for TraitPredPrintWithBoundConstness<'tcx>

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impl<'tcx, '__lifted> Lift<TyCtxt<'__lifted>> for TraitRefPrintOnlyTraitName<'tcx>

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impl<'tcx, '__lifted> Lift<TyCtxt<'__lifted>> for TraitRefPrintOnlyTraitPath<'tcx>

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impl<'tcx, '__lifted> Lift<TyCtxt<'__lifted>> for TraitRefPrintSugared<'tcx>

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impl<I, J> Lift<J> for ExistentialPredicate<I>
where I: Interner, J: Interner, ExistentialTraitRef<I>: Lift<J, Lifted = ExistentialTraitRef<J>>, ExistentialProjection<I>: Lift<J, Lifted = ExistentialProjection<J>>, <I as Interner>::DefId: Lift<J, Lifted = <J as Interner>::DefId>,

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impl<I, J> Lift<J> for rustc_type_ir::const_kind::UnevaluatedConst<I>
where I: Interner, J: Interner, <I as Interner>::DefId: Lift<J, Lifted = <J as Interner>::DefId>, <I as Interner>::GenericArgs: Lift<J, Lifted = <J as Interner>::GenericArgs>,

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impl<I, J> Lift<J> for AliasTerm<I>
where I: Interner, J: Interner, <I as Interner>::GenericArgs: Lift<J, Lifted = <J as Interner>::GenericArgs>, <I as Interner>::DefId: Lift<J, Lifted = <J as Interner>::DefId>, (): Lift<J, Lifted = ()>,

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impl<I, J> Lift<J> for CoercePredicate<I>
where I: Interner, J: Interner, <I as Interner>::Ty: Lift<J, Lifted = <J as Interner>::Ty>,

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impl<I, J> Lift<J> for ExistentialProjection<I>
where J: Interner, <I as Interner>::DefId: Lift<J, Lifted = <J as Interner>::DefId>, <I as Interner>::GenericArgs: Lift<J, Lifted = <J as Interner>::GenericArgs>, <I as Interner>::Term: Lift<J, Lifted = <J as Interner>::Term>, I: Interner, (): Lift<J, Lifted = ()>,

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impl<I, J> Lift<J> for ExistentialTraitRef<I>
where I: Interner, J: Interner, <I as Interner>::DefId: Lift<J, Lifted = <J as Interner>::DefId>, <I as Interner>::GenericArgs: Lift<J, Lifted = <J as Interner>::GenericArgs>, (): Lift<J, Lifted = ()>,

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impl<I, J> Lift<J> for HostEffectPredicate<I>
where I: Interner, J: Interner, TraitRef<I>: Lift<J, Lifted = TraitRef<J>>, BoundConstness: Lift<J, Lifted = BoundConstness>,

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impl<I, J> Lift<J> for NormalizesTo<I>
where I: Interner, J: Interner, AliasTerm<I>: Lift<J, Lifted = AliasTerm<J>>, <I as Interner>::Term: Lift<J, Lifted = <J as Interner>::Term>,

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impl<I, J> Lift<J> for ProjectionPredicate<I>
where I: Interner, J: Interner, AliasTerm<I>: Lift<J, Lifted = AliasTerm<J>>, <I as Interner>::Term: Lift<J, Lifted = <J as Interner>::Term>,

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impl<I, J> Lift<J> for SubtypePredicate<I>
where I: Interner, J: Interner, bool: Lift<J, Lifted = bool>, <I as Interner>::Ty: Lift<J, Lifted = <J as Interner>::Ty>,

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impl<I, J> Lift<J> for TraitPredicate<I>
where I: Interner, J: Interner, TraitRef<I>: Lift<J, Lifted = TraitRef<J>>, PredicatePolarity: Lift<J, Lifted = PredicatePolarity>,

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impl<I, J> Lift<J> for TraitRef<I>
where I: Interner, J: Interner, <I as Interner>::DefId: Lift<J, Lifted = <J as Interner>::DefId>, <I as Interner>::GenericArgs: Lift<J, Lifted = <J as Interner>::GenericArgs>, (): Lift<J, Lifted = ()>,

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impl<I, J> Lift<J> for AliasTy<I>
where I: Interner, J: Interner, <I as Interner>::GenericArgs: Lift<J, Lifted = <J as Interner>::GenericArgs>, <I as Interner>::DefId: Lift<J, Lifted = <J as Interner>::DefId>, (): Lift<J, Lifted = ()>,

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impl<I, J> Lift<J> for FnSig<I>
where J: Interner, <I as Interner>::Tys: Lift<J, Lifted = <J as Interner>::Tys>, bool: Lift<J, Lifted = bool>, <I as Interner>::Safety: Lift<J, Lifted = <J as Interner>::Safety>, I: Interner, <I as Interner>::Abi: Lift<J, Lifted = <J as Interner>::Abi>,

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impl<I, J> Lift<J> for CanonicalVarValues<I>
where I: Interner, J: Interner, <I as Interner>::GenericArgs: Lift<J, Lifted = <J as Interner>::GenericArgs>,

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impl<I, J> Lift<J> for ClosureArgs<I>
where I: Interner, J: Interner, <I as Interner>::GenericArgs: Lift<J, Lifted = <J as Interner>::GenericArgs>,

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impl<I, J> Lift<J> for CoroutineArgs<I>
where I: Interner, J: Interner, <I as Interner>::GenericArgs: Lift<J, Lifted = <J as Interner>::GenericArgs>,

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impl<I, J> Lift<J> for CoroutineClosureArgs<I>
where I: Interner, J: Interner, <I as Interner>::GenericArgs: Lift<J, Lifted = <J as Interner>::GenericArgs>,

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impl<I, J> Lift<J> for FnHeader<I>
where I: Interner, J: Interner, bool: Lift<J, Lifted = bool>, <I as Interner>::Safety: Lift<J, Lifted = <J as Interner>::Safety>, <I as Interner>::Abi: Lift<J, Lifted = <J as Interner>::Abi>,

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impl<I, J> Lift<J> for FnSigTys<I>
where I: Interner, J: Interner, <I as Interner>::Tys: Lift<J, Lifted = <J as Interner>::Tys>,

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impl<I, P, J> Lift<J> for Goal<I, P>
where I: Interner, J: Interner, <I as Interner>::ParamEnv: Lift<J, Lifted = <J as Interner>::ParamEnv>, P: Lift<J, Lifted = P>,

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type Lifted = Goal<J, P>

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impl<I, U, A> Lift<U> for OutlivesPredicate<I, A>
where I: Interner, U: Interner, A: Lift<U>, <I as Interner>::Region: Lift<U, Lifted = <U as Interner>::Region>,

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impl<I, U, T> Lift<U> for Binder<I, T>
where I: Interner, U: Interner, T: Lift<U>, <I as Interner>::BoundVarKinds: Lift<U, Lifted = <U as Interner>::BoundVarKinds>,

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type Lifted = Binder<U, <T as Lift<U>>::Lifted>