Struct rustc_infer::infer::relate::glb::Glb

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pub struct Glb<'combine, 'infcx, 'tcx> {
    fields: &'combine mut CombineFields<'infcx, 'tcx>,
}
Expand description

“Greatest lower bound” (common subtype)

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§fields: &'combine mut CombineFields<'infcx, 'tcx>

Implementations§

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impl<'combine, 'infcx, 'tcx> Glb<'combine, 'infcx, 'tcx>

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pub fn new( fields: &'combine mut CombineFields<'infcx, 'tcx>, ) -> Glb<'combine, 'infcx, 'tcx>

Trait Implementations§

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impl<'combine, 'infcx, 'tcx> LatticeDir<'infcx, 'tcx> for Glb<'combine, 'infcx, 'tcx>

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fn infcx(&self) -> &'infcx InferCtxt<'tcx>

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fn cause(&self) -> &ObligationCause<'tcx>

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fn relate_bound( &mut self, v: Ty<'tcx>, a: Ty<'tcx>, b: Ty<'tcx>, ) -> RelateResult<'tcx, ()>

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fn define_opaque_types(&self) -> DefineOpaqueTypes

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impl<'tcx> PredicateEmittingRelation<InferCtxt<'tcx>> for Glb<'_, '_, 'tcx>

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fn span(&self) -> Span

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fn structurally_relate_aliases(&self) -> StructurallyRelateAliases

Whether aliases should be related structurally. This is pretty much always No unless you’re equating in some specific locations of the new solver. See the comments in these use-cases for more details.
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fn param_env(&self) -> ParamEnv<'tcx>

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fn register_predicates( &mut self, obligations: impl IntoIterator<Item: Upcast<TyCtxt<'tcx>, Predicate<'tcx>>>, )

Register predicates that must hold in order for this relation to hold. This uses the default param_env of the obligation.
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fn register_goals( &mut self, obligations: impl IntoIterator<Item = Goal<'tcx, Predicate<'tcx>>>, )

Register obligations that must hold in order for this relation to hold
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fn register_alias_relate_predicate(&mut self, a: Ty<'tcx>, b: Ty<'tcx>)

Register AliasRelate obligation(s) that both types must be related to each other.
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impl<'tcx> TypeRelation<TyCtxt<'tcx>> for Glb<'_, '_, 'tcx>

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fn tag(&self) -> &'static str

Returns a static string we can use for printouts.
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fn tcx(&self) -> TyCtxt<'tcx>

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fn relate_with_variance<T: Relate<TyCtxt<'tcx>>>( &mut self, variance: Variance, _info: VarianceDiagInfo<TyCtxt<'tcx>>, a: T, b: T, ) -> RelateResult<'tcx, T>

Switch variance for the purpose of relating a and b.
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fn tys(&mut self, a: Ty<'tcx>, b: Ty<'tcx>) -> RelateResult<'tcx, Ty<'tcx>>

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fn regions( &mut self, a: Region<'tcx>, b: Region<'tcx>, ) -> RelateResult<'tcx, Region<'tcx>>

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fn consts( &mut self, a: Const<'tcx>, b: Const<'tcx>, ) -> RelateResult<'tcx, Const<'tcx>>

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fn binders<T>( &mut self, a: Binder<'tcx, T>, b: Binder<'tcx, T>, ) -> RelateResult<'tcx, Binder<'tcx, T>>
where T: Relate<TyCtxt<'tcx>>,

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fn relate<T>(&mut self, a: T, b: T) -> Result<T, TypeError<I>>
where T: Relate<I>,

Generic relation routine suitable for most anything.
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fn relate_item_args( &mut self, item_def_id: <I as Interner>::DefId, a_arg: <I as Interner>::GenericArgs, b_arg: <I as Interner>::GenericArgs, ) -> Result<<I as Interner>::GenericArgs, TypeError<I>>

Relate the two args for the given item. The default is to look up the variance for the item and proceed accordingly.

Auto Trait Implementations§

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impl<'combine, 'infcx, 'tcx> !DynSend for Glb<'combine, 'infcx, 'tcx>

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impl<'combine, 'infcx, 'tcx> !DynSync for Glb<'combine, 'infcx, 'tcx>

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impl<'combine, 'infcx, 'tcx> Freeze for Glb<'combine, 'infcx, 'tcx>

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impl<'combine, 'infcx, 'tcx> !RefUnwindSafe for Glb<'combine, 'infcx, 'tcx>

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impl<'combine, 'infcx, 'tcx> !Send for Glb<'combine, 'infcx, 'tcx>

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impl<'combine, 'infcx, 'tcx> !Sync for Glb<'combine, 'infcx, 'tcx>

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impl<'combine, 'infcx, 'tcx> Unpin for Glb<'combine, 'infcx, 'tcx>

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impl<'combine, 'infcx, 'tcx> !UnwindSafe for Glb<'combine, 'infcx, '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<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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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, 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<I, T, U> Upcast<I, U> for T
where U: UpcastFrom<I, T>,

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fn upcast(self, interner: I) -> U

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impl<I, T> UpcastFrom<I, T> for T

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fn upcast_from(from: T, _tcx: I) -> T

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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,

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: 8 bytes