pub(crate) enum UndoLog<'tcx> {
    OpaqueTypes(OpaqueTypeKey<'tcx>, Option<OpaqueHiddenType<'tcx>>),
    TypeVariables(UndoLog<Delegate<TyVidEqKey<'tcx>>>),
    ConstUnificationTable(UndoLog<Delegate<ConstVidKey<'tcx>>>),
    IntUnificationTable(UndoLog<Delegate<IntVid>>),
    FloatUnificationTable(UndoLog<Delegate<FloatVid>>),
    EffectUnificationTable(UndoLog<Delegate<EffectVidKey<'tcx>>>),
    RegionConstraintCollector(UndoLog<'tcx>),
    RegionUnificationTable(UndoLog<Delegate<RegionVidKey<'tcx>>>),
    ProjectionCache(UndoLog<ProjectionCacheKey<'tcx>, ProjectionCacheEntry<'tcx>>),
    PushRegionObligation,
}
Expand description

Records the “undo” data for a single operation that affects some form of inference variable.

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OpaqueTypes(OpaqueTypeKey<'tcx>, Option<OpaqueHiddenType<'tcx>>)

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

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

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IntUnificationTable(UndoLog<Delegate<IntVid>>)

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FloatUnificationTable(UndoLog<Delegate<FloatVid>>)

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EffectUnificationTable(UndoLog<Delegate<EffectVidKey<'tcx>>>)

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RegionConstraintCollector(UndoLog<'tcx>)

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

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

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PushRegionObligation

Trait Implementations§

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

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

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<'tcx> From<UndoLog<'tcx>> for UndoLog<'tcx>

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

Converts to this type from the input type.
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impl<'tcx> From<UndoLog<ProjectionCacheKey<'tcx>, ProjectionCacheEntry<'tcx>>> for UndoLog<'tcx>

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

Converts to this type from the input type.
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impl<'tcx> Rollback<UndoLog<'tcx>> for InferCtxtInner<'tcx>

The Rollback trait defines how to rollback a particular action.

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

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impl<'tcx> DynSend for UndoLog<'tcx>

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impl<'tcx> DynSync for UndoLog<'tcx>

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impl<'tcx> !RefUnwindSafe for UndoLog<'tcx>

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impl<'tcx> Send for UndoLog<'tcx>

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impl<'tcx> Sync for UndoLog<'tcx>

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impl<'tcx> Unpin for UndoLog<'tcx>

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impl<'tcx> !UnwindSafe for UndoLog<'tcx>

Blanket Implementations§

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T, R> CollectAndApply<T, R> for T

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fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to f(&iter.collect::<Vec<_>>()).

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type Output = R

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impl<T> Filterable for T

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fn filterable( self, filter_name: &'static str ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

Creates a filterable data provider with the given name for debugging. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<P> IntoQueryParam<P> for P

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impl<T> MaybeResult<T> for T

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type Error = !

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fn from(_: Result<T, <T as MaybeResult<T>>::Error>) -> T

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fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<'tcx, T> ToPredicate<'tcx, T> for T

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fn to_predicate(self, _tcx: TyCtxt<'tcx>) -> T

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<Tcx, T> Value<Tcx> for T
where Tcx: DepContext,

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default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed ) -> T

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<'a, T> Captures<'a> for T
where T: ?Sized,

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impl<T> ErasedDestructor for T
where T: 'static,

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impl<T> MaybeSendSync for T
where T: Send + Sync,

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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: 56 bytes

Size for each variant:

  • OpaqueTypes: 40 bytes
  • TypeVariables: 40 bytes
  • ConstUnificationTable: 48 bytes
  • IntUnificationTable: 32 bytes
  • FloatUnificationTable: 32 bytes
  • EffectUnificationTable: 32 bytes
  • RegionConstraintCollector: 32 bytes
  • RegionUnificationTable: 40 bytes
  • ProjectionCache: 56 bytes
  • PushRegionObligation: 0 bytes