## Probe

# Struct Probe

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    pub struct Probe<I>where
        I: Interner,{
        pub steps: Vec<ProbeStep<I>>,
        pub kind: ProbeKind<I>,
        pub final_state: Canonical<I, State<I, ()>>,
    }

Expand description

A self-contained computation during trait solving. This either corresponds to a `EvalCtxt::probe(_X)` call or the root evaluation of a goal.

## Fields§

§`steps: Vec<ProbeStep<I>>`

What happened inside of this probe in chronological order.

§`kind: ProbeKind<I>`§`final_state: Canonical<I, State<I, ()>>`

## Trait Implementations§

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### impl<'tcx> ArenaAllocatable<'tcx> for Probe<TyCtxt<'tcx>>

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#### fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut Self

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#### fn allocate_from_iter( arena: &'tcx Arena<'tcx>, iter: impl IntoIterator<Item = Self>, ) -> &'tcx mut [Self]

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### impl<I> Debug for Probe<I>
where I: Interner,

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#### fn fmt(&self, __f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
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### impl<I> Hash for Probe<I>
where I: Interner,

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#### fn hash<__H>(&self, __state: &mut __H)
where __H: Hasher,

Feeds this value into the given `Hasher`. Read more
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#### fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given `Hasher`. Read more
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### impl<I> PartialEq for Probe<I>
where I: Interner,

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#### fn eq(&self, __other: &Probe<I>) -> bool

Tests for `self` and `other` values to be equal, and is used by `==`.
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#### fn ne(&self, other: &Rhs) -> bool

Tests for `!=`. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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### impl<I> Eq for Probe<I>
where I: Interner,

## Auto Trait Implementations§

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### impl<I> DynSend for Probe<I>
where <I as Interner>::CanonicalVarKinds: DynSend, <I as Interner>::ImplId: DynSend, <I as Interner>::GenericArgs: DynSend, <I as Interner>::ExternalConstraints: DynSend, <I as Interner>::ParamEnv: DynSend, <I as Interner>::Predicate: DynSend,

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### impl<I> DynSync for Probe<I>
where <I as Interner>::CanonicalVarKinds: DynSync, <I as Interner>::ImplId: DynSync, <I as Interner>::GenericArgs: DynSync, <I as Interner>::ExternalConstraints: DynSync, <I as Interner>::ParamEnv: DynSync, <I as Interner>::Predicate: DynSync,

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### impl<I> Freeze for Probe<I>
where <I as Interner>::CanonicalVarKinds: Freeze, <I as Interner>::ImplId: Freeze, <I as Interner>::GenericArgs: Freeze, <I as Interner>::ExternalConstraints: Freeze,

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### impl<I> RefUnwindSafe for Probe<I>
where <I as Interner>::CanonicalVarKinds: RefUnwindSafe, <I as Interner>::ImplId: RefUnwindSafe, <I as Interner>::GenericArgs: RefUnwindSafe, <I as Interner>::ExternalConstraints: RefUnwindSafe, <I as Interner>::ParamEnv: RefUnwindSafe, <I as Interner>::Predicate: RefUnwindSafe,

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### impl<I> Send for Probe<I>
where <I as Interner>::CanonicalVarKinds: Send, <I as Interner>::ImplId: Send, <I as Interner>::GenericArgs: Send, <I as Interner>::ExternalConstraints: Send, <I as Interner>::ParamEnv: Send, <I as Interner>::Predicate: Send,

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### impl<I> Sync for Probe<I>
where <I as Interner>::CanonicalVarKinds: Sync, <I as Interner>::ImplId: Sync, <I as Interner>::GenericArgs: Sync, <I as Interner>::ExternalConstraints: Sync, <I as Interner>::ParamEnv: Sync, <I as Interner>::Predicate: Sync,

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### impl<I> Unpin for Probe<I>
where <I as Interner>::CanonicalVarKinds: Unpin, <I as Interner>::ImplId: Unpin, <I as Interner>::GenericArgs: Unpin, <I as Interner>::ExternalConstraints: Unpin, <I as Interner>::ParamEnv: Unpin, <I as Interner>::Predicate: Unpin,

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### impl<I> UnwindSafe for Probe<I>
where <I as Interner>::CanonicalVarKinds: UnwindSafe, <I as Interner>::ImplId: UnwindSafe, <I as Interner>::GenericArgs: UnwindSafe, <I as Interner>::ExternalConstraints: UnwindSafe, <I as Interner>::ParamEnv: UnwindSafe, <I as Interner>::Predicate: UnwindSafe,

## 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> AnyEq for T
where T: Any + PartialEq,

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#### fn equals(&self, other: &(dyn Any + 'static)) -> bool

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#### fn as_any(&self) -> &(dyn Any + 'static)

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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<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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#### fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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### impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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#### fn equivalent(&self, key: &K) -> bool

Compare self to `key` and return `true` if they are equal.
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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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#### fn into_query_param(self) -> 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<T> ErasedDestructor for T
where T: 'static,

## Layout§

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.