Enum rustc_infer::infer::undo_log::UndoLog

pub(crate) enum UndoLog<'tcx> {
    TypeVariables(UndoLog<'tcx>),
    ConstUnificationTable(UndoLog<Delegate<ConstVid<'tcx>>>),
    IntUnificationTable(UndoLog<Delegate<IntVid>>),
    FloatUnificationTable(UndoLog<Delegate<FloatVid>>),
    RegionConstraintCollector(UndoLog<'tcx>),
    RegionUnificationTable(UndoLog<Delegate<RegionVidKey<'tcx>>>),
    ProjectionCache(UndoLog<ProjectionCacheKey<'tcx>, ProjectionCacheEntry<'tcx>>),
    PushRegionObligation,
}

Records the “undo” data for a single operation that affects some form of inference variable.

Variants

TypeVariables(UndoLog<'tcx>)

ConstUnificationTable(UndoLog<Delegate<ConstVid<'tcx>>>)

IntUnificationTable(UndoLog<Delegate<IntVid>>)

FloatUnificationTable(UndoLog<Delegate<FloatVid>>)

RegionConstraintCollector(UndoLog<'tcx>)

RegionUnificationTable(UndoLog<Delegate<RegionVidKey<'tcx>>>)

ProjectionCache(UndoLog<ProjectionCacheKey<'tcx>, ProjectionCacheEntry<'tcx>>)

PushRegionObligation

Trait Implementations

impl<'tcx> From<Instantiate> for UndoLog<'tcx>

fn from(x: Instantiate) -> Self

Performs the conversion.

impl<'tcx> From<UndoLog<'tcx>> for UndoLog<'tcx>

fn from(x: UndoLog<'tcx>) -> Self

Performs the conversion.

impl<'tcx> From<UndoLog<'tcx>> for UndoLog<'tcx>

fn from(x: UndoLog<'tcx>) -> Self

Performs the conversion.

impl<'tcx> From<UndoLog<Delegate>> for UndoLog<'tcx>

fn from(x: UndoLog<Delegate>) -> Self

Performs the conversion.

impl<'tcx> From<UndoLog<ProjectionCacheKey<'tcx>, ProjectionCacheEntry<'tcx>>> for UndoLog<'tcx>

fn from(
    x: UndoLog<ProjectionCacheKey<'tcx>, ProjectionCacheEntry<'tcx>>
) -> Self

Performs the conversion.

impl<'tcx> Rollback<UndoLog<'tcx>> for InferCtxtInner<'tcx>

The Rollback trait defines how to rollback a particular action.

fn reverse(&mut self, undo: UndoLog<'tcx>)

Layout

Note: Most layout information is completely unstable and may be different between compiler versions and platforms. 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: 72 bytes