Struct rustc_infer::infer::outlives::obligations::TypeOutlives

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pub struct TypeOutlives<'cx, 'tcx, D>
where D: TypeOutlivesDelegate<'tcx>,
{ delegate: D, tcx: TyCtxt<'tcx>, verify_bound: VerifyBoundCx<'cx, 'tcx>, }
Expand description

The TypeOutlives struct has the job of “lowering” a T: 'a obligation into a series of 'a: 'b constraints and “verify“s, as described on the module comment. The final constraints are emitted via a “delegate” of type D – this is usually the infcx, which accrues them into the region_obligations code, but for NLL we use something else.

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§delegate: D§tcx: TyCtxt<'tcx>§verify_bound: VerifyBoundCx<'cx, 'tcx>

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impl<'cx, 'tcx, D> TypeOutlives<'cx, 'tcx, D>
where D: TypeOutlivesDelegate<'tcx>,

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pub fn new( delegate: D, tcx: TyCtxt<'tcx>, region_bound_pairs: &'cx RegionBoundPairs<'tcx>, implicit_region_bound: Option<Region<'tcx>>, caller_bounds: &'cx [PolyTypeOutlivesPredicate<'tcx>], ) -> Self

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pub fn type_must_outlive( &mut self, origin: SubregionOrigin<'tcx>, ty: Ty<'tcx>, region: Region<'tcx>, category: ConstraintCategory<'tcx>, )

Adds constraints to inference such that T: 'a holds (or reports an error if it cannot).

§Parameters
  • origin, the reason we need this constraint
  • ty, the type T
  • region, the region 'a
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fn components_must_outlive( &mut self, origin: SubregionOrigin<'tcx>, components: &[Component<'tcx>], region: Region<'tcx>, category: ConstraintCategory<'tcx>, )

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fn param_ty_must_outlive( &mut self, origin: SubregionOrigin<'tcx>, region: Region<'tcx>, param_ty: ParamTy, )

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fn placeholder_ty_must_outlive( &mut self, origin: SubregionOrigin<'tcx>, region: Region<'tcx>, placeholder_ty: PlaceholderType, )

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fn alias_ty_must_outlive( &mut self, origin: SubregionOrigin<'tcx>, region: Region<'tcx>, alias_ty: AliasTy<'tcx>, )

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fn args_must_outlive( &mut self, args: GenericArgsRef<'tcx>, origin: SubregionOrigin<'tcx>, region: Region<'tcx>, opt_variances: Option<&[Variance]>, )

Auto Trait Implementations§

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impl<'cx, 'tcx, D> DynSend for TypeOutlives<'cx, 'tcx, D>
where D: DynSend,

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impl<'cx, 'tcx, D> DynSync for TypeOutlives<'cx, 'tcx, D>
where D: DynSync,

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impl<'cx, 'tcx, D> Freeze for TypeOutlives<'cx, 'tcx, D>
where D: Freeze,

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impl<'cx, 'tcx, D> !RefUnwindSafe for TypeOutlives<'cx, 'tcx, D>

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impl<'cx, 'tcx, D> !Send for TypeOutlives<'cx, 'tcx, D>

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impl<'cx, 'tcx, D> !Sync for TypeOutlives<'cx, 'tcx, D>

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impl<'cx, 'tcx, D> Unpin for TypeOutlives<'cx, 'tcx, D>
where D: Unpin,

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impl<'cx, 'tcx, D> !UnwindSafe for TypeOutlives<'cx, 'tcx, D>

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to f(&iter.collect::<Vec<_>>()).

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type Output = R

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Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.