pub(crate) struct ConstraintGraph<D: ConstraintGraphDirection> {
    _direction: D,
    first_constraints: IndexVec<RegionVid, Option<OutlivesConstraintIndex>>,
    next_constraints: IndexVec<OutlivesConstraintIndex, Option<OutlivesConstraintIndex>>,
}
Expand description

The construct graph organizes the constraints by their end-points. It can be used to view a R1: R2 constraint as either an edge R1 -> R2 or R2 -> R1 depending on the direction type D.

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§_direction: D§first_constraints: IndexVec<RegionVid, Option<OutlivesConstraintIndex>>§next_constraints: IndexVec<OutlivesConstraintIndex, Option<OutlivesConstraintIndex>>

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impl<D: ConstraintGraphDirection> ConstraintGraph<D>

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pub(crate) fn new( direction: D, set: &OutlivesConstraintSet<'_>, num_region_vars: usize ) -> Self

Creates a “dependency graph” where each region constraint R1: R2 is treated as an edge R1 -> R2. We use this graph to construct SCCs for region inference but also for error reporting.

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pub(crate) fn region_graph<'rg, 'tcx>( &'rg self, set: &'rg OutlivesConstraintSet<'tcx>, static_region: RegionVid ) -> RegionGraph<'rg, 'tcx, D>

Given the constraint set from which this graph was built creates a region graph so that you can iterate over regions and not constraints.

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pub(crate) fn outgoing_edges<'a, 'tcx>( &'a self, region_sup: RegionVid, constraints: &'a OutlivesConstraintSet<'tcx>, static_region: RegionVid ) -> Edges<'a, 'tcx, D>

Given a region R, iterate over all constraints R: R1.

Auto Trait Implementations§

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impl<D> DynSend for ConstraintGraph<D>
where D: DynSend,

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impl<D> DynSync for ConstraintGraph<D>
where D: DynSync,

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impl<D> RefUnwindSafe for ConstraintGraph<D>
where D: RefUnwindSafe,

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impl<D> Send for ConstraintGraph<D>
where D: Send,

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impl<D> Sync for ConstraintGraph<D>
where D: Sync,

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impl<D> Unpin for ConstraintGraph<D>
where D: Unpin,

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impl<D> UnwindSafe for ConstraintGraph<D>
where D: UnwindSafe,

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Alignment of Self.
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type Output = R

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