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.

AddConstraint(Constraint<'tcx>)

We added the given constraint.

AddVerify(usize)

We added the given verify.

AddGiven(Region<'tcx>, RegionVid)

We added the given given.

AddCombination(CombineMapType, TwoRegions<'tcx>)

We added a GLB/LUB “combination variable”.

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

Converts to this type from the input type.

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: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

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