# Enum rustc_type_ir::lang_items::TraitSolverLangItem

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    pub enum TraitSolverLangItem {
    Show 41 variants    AsyncDestruct,
        AsyncFn,
        AsyncFnKindHelper,
        AsyncFnKindUpvars,
        AsyncFnMut,
        AsyncFnOnce,
        AsyncFnOnceOutput,
        AsyncIterator,
        CallOnceFuture,
        CallRefFuture,
        Clone,
        Copy,
        Coroutine,
        CoroutineReturn,
        CoroutineYield,
        Destruct,
        DiscriminantKind,
        DynMetadata,
        EffectsIntersection,
        EffectsIntersectionOutput,
        EffectsMaybe,
        EffectsNoRuntime,
        EffectsRuntime,
        Fn,
        FnMut,
        FnOnce,
        FnPtrTrait,
        FusedIterator,
        Future,
        FutureOutput,
        Iterator,
        Metadata,
        Option,
        PointeeTrait,
        PointerLike,
        Poll,
        Sized,
        TransmuteTrait,
        Tuple,
        Unpin,
        Unsize,
    }

Expand description

Lang items used by the new trait solver. This can be mapped to whatever internal representation of `LangItem`s used in the underlying compiler implementation.

## Variants§

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### AsyncDestruct

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### AsyncFn

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### AsyncFnKindHelper

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### AsyncFnKindUpvars

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### AsyncFnMut

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### AsyncFnOnce

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### AsyncFnOnceOutput

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### AsyncIterator

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### CallOnceFuture

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### CallRefFuture

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### Clone

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### Copy

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### Coroutine

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### CoroutineReturn

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### CoroutineYield

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### Destruct

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### DiscriminantKind

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### DynMetadata

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### EffectsIntersection

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### EffectsIntersectionOutput

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### EffectsMaybe

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### EffectsNoRuntime

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### EffectsRuntime

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### Fn

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### FnMut

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### FnOnce

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### FnPtrTrait

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### FusedIterator

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### Future

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### FutureOutput

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### Iterator

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### Metadata

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### Option

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### PointeeTrait

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### PointerLike

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### Poll

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### Sized

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### TransmuteTrait

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### Tuple

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### Unpin

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### Unsize

## Auto Trait Implementations§

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### impl DynSend for TraitSolverLangItem

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### impl DynSync for TraitSolverLangItem

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### impl Freeze for TraitSolverLangItem

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### impl RefUnwindSafe for TraitSolverLangItem

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### impl Send for TraitSolverLangItem

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### impl Sync for TraitSolverLangItem

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### impl Unpin for TraitSolverLangItem

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### impl UnwindSafe for TraitSolverLangItem

## 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> 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<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<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,

## 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: 1 byte

Size for each variant:

- `AsyncDestruct`: 0 bytes
- `AsyncFn`: 0 bytes
- `AsyncFnKindHelper`: 0 bytes
- `AsyncFnKindUpvars`: 0 bytes
- `AsyncFnMut`: 0 bytes
- `AsyncFnOnce`: 0 bytes
- `AsyncFnOnceOutput`: 0 bytes
- `AsyncIterator`: 0 bytes
- `CallOnceFuture`: 0 bytes
- `CallRefFuture`: 0 bytes
- `Clone`: 0 bytes
- `Copy`: 0 bytes
- `Coroutine`: 0 bytes
- `CoroutineReturn`: 0 bytes
- `CoroutineYield`: 0 bytes
- `Destruct`: 0 bytes
- `DiscriminantKind`: 0 bytes
- `DynMetadata`: 0 bytes
- `EffectsIntersection`: 0 bytes
- `EffectsIntersectionOutput`: 0 bytes
- `EffectsMaybe`: 0 bytes
- `EffectsNoRuntime`: 0 bytes
- `EffectsRuntime`: 0 bytes
- `Fn`: 0 bytes
- `FnMut`: 0 bytes
- `FnOnce`: 0 bytes
- `FnPtrTrait`: 0 bytes
- `FusedIterator`: 0 bytes
- `Future`: 0 bytes
- `FutureOutput`: 0 bytes
- `Iterator`: 0 bytes
- `Metadata`: 0 bytes
- `Option`: 0 bytes
- `PointeeTrait`: 0 bytes
- `PointerLike`: 0 bytes
- `Poll`: 0 bytes
- `Sized`: 0 bytes
- `TransmuteTrait`: 0 bytes
- `Tuple`: 0 bytes
- `Unpin`: 0 bytes
- `Unsize`: 0 bytes