Enum rustc_infer::infer::region_constraints::UndoLog

pub(crate) enum UndoLog<'tcx> {
    AddVar(RegionVid),
    AddConstraint(Constraint<'tcx>),
    AddVerify(usize),
    AddGiven(Region<'tcx>, RegionVid),
    AddCombination(CombineMapType, TwoRegions<'tcx>),
}

Variants

AddVar(RegionVid)

We added RegionVid.

Tuple Fields of AddVar

0: RegionVid

AddConstraint(Constraint<'tcx>)

We added the given constraint.

Tuple Fields of AddConstraint

0: Constraint<'tcx>

AddVerify(usize)

We added the given verify.

Tuple Fields of AddVerify

0: usize

AddGiven(Region<'tcx>, RegionVid)

We added the given given.

Tuple Fields of AddGiven

0: Region<'tcx>1: RegionVid

AddCombination(CombineMapType, TwoRegions<'tcx>)

We added a GLB/LUB “combination variable”.

Tuple Fields of AddCombination

0: CombineMapType1: TwoRegions<'tcx>

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<UndoLog<'tcx>> for UndoLog<'tcx>

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

Performs the conversion.

impl<'tcx> PartialEq<UndoLog<'tcx>> for UndoLog<'tcx>

fn eq(&self, other: &UndoLog<'tcx>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &UndoLog<'tcx>) -> bool

This method tests for !=.

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

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

impl<'tcx> Copy for UndoLog<'tcx>

impl<'tcx> StructuralPartialEq for 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: 32 bytes

Size for each variant:

• AddVar: 7 bytes
• AddConstraint: 31 bytes
• AddVerify: 15 bytes
• AddGiven: 15 bytes
• AddCombination: 23 bytes