Struct rustc_borrowck::constraints::graph::ConstraintGraph
source · pub(crate) struct ConstraintGraph<D: ConstraintGraphDirecton> {
_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.
Fields
_direction: Dfirst_constraints: IndexVec<RegionVid, Option<OutlivesConstraintIndex>>next_constraints: IndexVec<OutlivesConstraintIndex, Option<OutlivesConstraintIndex>>Implementations
sourceimpl<D: ConstraintGraphDirecton> ConstraintGraph<D>
impl<D: ConstraintGraphDirecton> ConstraintGraph<D>
sourcepub(crate) fn new(
direction: D,
set: &OutlivesConstraintSet<'_>,
num_region_vars: usize
) -> Self
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.
sourcepub(crate) fn region_graph<'rg, 'tcx>(
&'rg self,
set: &'rg OutlivesConstraintSet<'tcx>,
static_region: RegionVid
) -> RegionGraph<'rg, 'tcx, D>
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.
sourcepub(crate) fn outgoing_edges<'a, 'tcx>(
&'a self,
region_sup: RegionVid,
constraints: &'a OutlivesConstraintSet<'tcx>,
static_region: RegionVid
) -> Edges<'a, 'tcx, D>ⓘNotable traits for Edges<'s, 'tcx, D>impl<'s, 'tcx, D: ConstraintGraphDirecton> Iterator for Edges<'s, 'tcx, D> type Item = OutlivesConstraint<'tcx>;
pub(crate) fn outgoing_edges<'a, 'tcx>(
&'a self,
region_sup: RegionVid,
constraints: &'a OutlivesConstraintSet<'tcx>,
static_region: RegionVid
) -> Edges<'a, 'tcx, D>ⓘNotable traits for Edges<'s, 'tcx, D>impl<'s, 'tcx, D: ConstraintGraphDirecton> Iterator for Edges<'s, 'tcx, D> type Item = OutlivesConstraint<'tcx>;
Given a region R, iterate over all constraints R: R1.
Auto Trait Implementations
impl<D> RefUnwindSafe for ConstraintGraph<D>where
D: RefUnwindSafe,
impl<D> Send for ConstraintGraph<D>where
D: Send,
impl<D> Sync for ConstraintGraph<D>where
D: Sync,
impl<D> Unpin for ConstraintGraph<D>where
D: Unpin,
impl<D> UnwindSafe for ConstraintGraph<D>where
D: UnwindSafe,
Blanket Implementations
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
impl<'a, T> Captures<'a> for Twhere
T: ?Sized,
Layout
Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.