Struct DeferredLocals 

pub(crate) struct DeferredLocals<'tcx> {
    by_region: IndexVec<RegionVid, Option<Local>>,
    drop_args_by_local: IndexVec<Local, Option<Vec<GenericArg<'tcx>>>>,
}

The data needed to compute region liveness on-demand while traversing the localized outlives constraint graph to compute loan liveness.

Fields

by_region: IndexVec<RegionVid, Option<Local>>

For each region, the local whose liveness is deferred.

Importantly, because of MIR renumbering, this will always be a 1:1 relationship.

drop_args_by_local: IndexVec<Local, Option<Vec<GenericArg<'tcx>>>>

For each deferred local, gets the regions contained within that local at use and drop.

Implementations

impl<'tcx> DeferredLocals<'tcx>

pub(crate) fn defer_local( &mut self, tcx: TyCtxt<'tcx>, universal_regions: &UniversalRegions<'tcx>, local: Local, local_ty: Ty<'tcx>, dropck_kinds: &[GenericArg<'tcx>], )

pub(crate) fn compute_deferred_local( &mut self, region: RegionVid, universal_regions: &UniversalRegions<'tcx>, liveness: &mut LivenessValues, live_region_variances: &mut IndexVec<RegionVid, Option<ConstraintDirection>>, comp: &mut LivenessComputation<'_, 'tcx>, )

For a given region, compute the liveness for the local containing it, if it is deferred.

Trait Implementations

impl<'tcx> Default for DeferredLocals<'tcx>

fn default() -> Self

Returns the “default value” for a type.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 48 bytes