Enum rustc_infer::infer::type_variable::UndoLog

pub(crate) enum UndoLog<'tcx> {
    EqRelation(UndoLog<Delegate<TyVidEqKey<'tcx>>>),
    SubRelation(UndoLog<Delegate<TyVid>>),
    Values(UndoLog<Delegate>),
}

Represents a single undo-able action that affects a type inference variable.

Variants

EqRelation(UndoLog<Delegate<TyVidEqKey<'tcx>>>)

Tuple Fields of EqRelation

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

SubRelation(UndoLog<Delegate<TyVid>>)

Tuple Fields of SubRelation

0: UndoLog<Delegate<TyVid>>

Values(UndoLog<Delegate>)

Tuple Fields of Values

0: UndoLog<Delegate>

Trait Implementations

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

Convert from a specific kind of undo to the more general UndoLog

fn from(l: 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<Delegate>> for UndoLog<'tcx>

Convert from a specific kind of undo to the more general UndoLog

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

Performs the conversion.

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

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: 48 bytes

Size for each variant:

• EqRelation: 40 bytes
• SubRelation: 24 bytes
• Values: 32 bytes