ProbeKind in rustc_middle::traits::solve::inspect - Rust
Description: What kind of probe we’re in. In case the probe represents a candidate, or the final result of the current goal - via ProbeKind::Root - we also store the QueryResult.

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## ProbeKind

# Enum ProbeKind

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    pub enum ProbeKind<I>where
        I: Interner,{
        Root {
            result: Result<Canonical<I, Response<I>>, NoSolution>,
        },
        NormalizedSelfTyAssembly,
        TraitCandidate {
            source: CandidateSource<I>,
            result: Result<Canonical<I, Response<I>>, NoSolution>,
        },
        UnsizeAssembly,
        ProjectionCompatibility,
        ShadowedEnvProbing,
        OpaqueTypeStorageLookup {
            result: Result<Canonical<I, Response<I>>, NoSolution>,
        },
        RigidAlias {
            result: Result<Canonical<I, Response<I>>, NoSolution>,
        },
    }

Expand description

What kind of probe we’re in. In case the probe represents a candidate, or the final result of the current goal - via ProbeKind::Root - we also store the QueryResult.

## Variants§

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### Root

The root inference context while proving a goal.

#### Fields

§`result: Result<Canonical<I, Response<I>>, NoSolution>`
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### NormalizedSelfTyAssembly

Probe entered when normalizing the self ty during candidate assembly

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### TraitCandidate

A candidate for proving a trait or alias-relate goal.

#### Fields

§`source: CandidateSource<I>`
§`result: Result<Canonical<I, Response<I>>, NoSolution>`
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### UnsizeAssembly

Used in the probe that wraps normalizing the non-self type for the unsize trait, which is also structurally matched on.

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### ProjectionCompatibility

Used to do a probe to find out what projection type(s) match a given alias bound or projection predicate. For trait upcasting, this is used to prove that the source type upholds all of the target type’s object bounds. For object type bounds, this is used when eagerly replacing supertrait aliases.

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### ShadowedEnvProbing

Looking for param-env candidates that satisfy the trait ref for a projection.

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### OpaqueTypeStorageLookup

Try to unify an opaque type with an existing key in the storage.

#### Fields

§`result: Result<Canonical<I, Response<I>>, NoSolution>`
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### RigidAlias

Checking that a rigid alias is well-formed.

#### Fields

§`result: Result<Canonical<I, Response<I>>, NoSolution>`

## Trait Implementations§

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### impl<I> Clone for ProbeKind<I>
where I: Interner,

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#### fn clone(&self) -> ProbeKind<I>

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

#### fn clone_from(&mut self, source: &Self)

Performs copy-assignment from `source`. Read more
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### impl<I> Debug for ProbeKind<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 ProbeKind<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 ProbeKind<I>
where I: Interner,

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#### fn eq(&self, __other: &ProbeKind<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> TypeFoldable<I> for ProbeKind<I>
where I: Interner, Result<Canonical<I, Response<I>>, NoSolution>: TypeFoldable<I>, CandidateSource<I>: TypeFoldable<I>,

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#### fn try_fold_with<__F>( self, __folder: &mut __F, ) -> Result<ProbeKind<I>, <__F as FallibleTypeFolder<I>>::Error>
where __F: FallibleTypeFolder<I>,

The entry point for folding. To fold a value `t` with a folder `f` call: `t.try_fold_with(f)`. Read more
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#### fn fold_with<__F>(self, __folder: &mut __F) -> ProbeKind<I>
where __F: TypeFolder<I>,

The entry point for folding. To fold a value `t` with a folder `f` call: `t.fold_with(f)`. Read more
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### impl<I> TypeVisitable<I> for ProbeKind<I>
where I: Interner, Result<Canonical<I, Response<I>>, NoSolution>: TypeVisitable<I>, CandidateSource<I>: TypeVisitable<I>,

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#### fn visit_with<__V>( &self, __visitor: &mut __V, ) -> <__V as TypeVisitor<I>>::Result
where __V: TypeVisitor<I>,

The entry point for visiting. To visit a value `t` with a visitor `v` call: `t.visit_with(v)`. Read more
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### impl<I> Copy for ProbeKind<I>
where I: Interner,

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### impl<I> Eq for ProbeKind<I>
where I: Interner,

## Auto Trait Implementations§

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

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

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

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

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

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

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

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### impl<I> UnsafeUnpin for ProbeKind<I>
where <I as Interner>::ImplId: UnsafeUnpin, <I as Interner>::CanonicalVarKinds: UnsafeUnpin, <I as Interner>::ExternalConstraints: UnsafeUnpin, <I as Interner>::GenericArgs: UnsafeUnpin,

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### impl<I> UnwindSafe for ProbeKind<I>
where <I as Interner>::ImplId: UnwindSafe, <I as Interner>::CanonicalVarKinds: UnwindSafe, <I as Interner>::ExternalConstraints: UnwindSafe, <I as Interner>::GenericArgs: 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<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
where T: Copy,

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#### fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut T

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#### fn allocate_from_iter( arena: &'tcx Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'tcx mut [T]

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### impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for T
where T: Copy,

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#### fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut T

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#### fn allocate_from_iter( arena: &'tcx Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'tcx mut [T]

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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> CloneToUninit for T
where T: Clone,

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#### unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (`clone_to_uninit`)
Performs copy-assignment from `self` to `dest`. 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> DynClone for T
where T: Clone,

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#### fn __clone_box(&self, _: Private) -> *mut ()

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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

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<K> IntoQueryKey<K> for K

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#### fn into_query_key(self) -> K

Argument conversion from `Self` to `K`. This should always be a very cheap conversion, e.g. `LocalDefId::to_def_id`.
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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<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<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.