pub(crate) struct OutlivesConstraintSet<'tcx> {
    outlives: IndexVec<OutlivesConstraintIndex, OutlivesConstraint<'tcx>>,
}
Expand description

A set of NLL region constraints. These include “outlives” constraints of the form R1: R2. Each constraint is identified by a unique OutlivesConstraintIndex and you can index into the set (constraint_set[i]) to access the constraint details.

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§outlives: IndexVec<OutlivesConstraintIndex, OutlivesConstraint<'tcx>>

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impl<'tcx> OutlivesConstraintSet<'tcx>

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pub(crate) fn push(&mut self, constraint: OutlivesConstraint<'tcx>)

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pub(crate) fn graph(&self, num_region_vars: usize) -> ConstraintGraph<Normal>

Constructs a “normal” graph from the constraint set; the graph makes it easy to find the constraints affecting a particular region.

N.B., this graph contains a “frozen” view of the current constraints. Any new constraints added to the OutlivesConstraintSet after the graph is built will not be present in the graph.

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pub(crate) fn reverse_graph( &self, num_region_vars: usize ) -> ConstraintGraph<Reverse>

Like graph, but constraints a reverse graph where R1: R2 represents an edge R2 -> R1.

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pub(crate) fn compute_sccs( &self, constraint_graph: &ConstraintGraph<Normal>, static_region: RegionVid ) -> Sccs<RegionVid, ConstraintSccIndex>

Computes cycles (SCCs) in the graph of regions. In particular, find all regions R1, R2 such that R1: R2 and R2: R1 and group them into an SCC, and find the relationships between SCCs.

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pub(crate) fn outlives( &self ) -> &IndexSlice<OutlivesConstraintIndex, OutlivesConstraint<'tcx>>

Trait Implementations§

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impl<'tcx> Clone for OutlivesConstraintSet<'tcx>

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fn clone(&self) -> OutlivesConstraintSet<'tcx>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<'tcx> Debug for OutlivesConstraintSet<'tcx>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<'tcx> Default for OutlivesConstraintSet<'tcx>

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fn default() -> OutlivesConstraintSet<'tcx>

Returns the “default value” for a type. Read more
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impl<'tcx> Index<OutlivesConstraintIndex> for OutlivesConstraintSet<'tcx>

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type Output = OutlivesConstraint<'tcx>

The returned type after indexing.
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fn index(&self, i: OutlivesConstraintIndex) -> &Self::Output

Performs the indexing (container[index]) operation. Read more

Auto Trait Implementations§

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impl<'tcx> DynSend for OutlivesConstraintSet<'tcx>

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impl<'tcx> DynSync for OutlivesConstraintSet<'tcx>

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impl<'tcx> Freeze for OutlivesConstraintSet<'tcx>

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impl<'tcx> !RefUnwindSafe for OutlivesConstraintSet<'tcx>

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impl<'tcx> Send for OutlivesConstraintSet<'tcx>

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impl<'tcx> Sync for OutlivesConstraintSet<'tcx>

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impl<'tcx> Unpin for OutlivesConstraintSet<'tcx>

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impl<'tcx> !UnwindSafe for OutlivesConstraintSet<'tcx>

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impl<T> Aligned for T

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const ALIGN: Alignment = _

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

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type Output = R

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fn filterable( self, filter_name: &'static str ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

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Size: 24 bytes