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>>>)

SubRelation(UndoLog<Delegate<TyVid>>)

Values(UndoLog<Delegate>)

Trait Implementations

impl<'tcx> Clone for UndoLog<'tcx>

fn clone(&self) -> UndoLog<'tcx>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

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

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

fn from(l: Instantiate) -> Self

Converts to this type from the input type.

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

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

Converts to this type from the input type.

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

Converts to this type from the input type.

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