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>)

Tuple Fields of TypeVariables

0: UndoLog<'tcx>

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

Tuple Fields of ConstUnificationTable

0: UndoLog<Delegate<ConstVid<'tcx>>>

IntUnificationTable(UndoLog<Delegate<IntVid>>)

Tuple Fields of IntUnificationTable

0: UndoLog<Delegate<IntVid>>

FloatUnificationTable(UndoLog<Delegate<FloatVid>>)

Tuple Fields of FloatUnificationTable

0: UndoLog<Delegate<FloatVid>>

RegionConstraintCollector(UndoLog<'tcx>)

Tuple Fields of RegionConstraintCollector

0: UndoLog<'tcx>

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

Tuple Fields of RegionUnificationTable

0: UndoLog<Delegate<RegionVidKey<'tcx>>>

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

Tuple Fields of ProjectionCache

0: 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 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: 72 bytes

Size for each variant:

• TypeVariables: 48 bytes
• ConstUnificationTable: 64 bytes
• IntUnificationTable: 24 bytes
• FloatUnificationTable: 24 bytes
• RegionConstraintCollector: 32 bytes
• RegionUnificationTable: 32 bytes
• ProjectionCache: 64 bytes
• PushRegionObligation: 0 bytes