Enum TyKind

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#[repr(C, u8)]
pub enum TyKind<'hir, Unambig = ()> {
Show 17 variants InferDelegation(DefId, InferDelegationKind), Slice(&'hir Ty<'hir>), Array(&'hir Ty<'hir>, &'hir ConstArg<'hir>), Ptr(MutTy<'hir>), Ref(&'hir Lifetime, MutTy<'hir>), BareFn(&'hir BareFnTy<'hir>), UnsafeBinder(&'hir UnsafeBinderTy<'hir>), Never, Tup(&'hir [Ty<'hir>]), Path(QPath<'hir>), OpaqueDef(&'hir OpaqueTy<'hir>), TraitAscription(GenericBounds<'hir>), TraitObject(&'hir [PolyTraitRef<'hir>], TaggedRef<'hir, Lifetime, TraitObjectSyntax>), Typeof(&'hir AnonConst), Err(ErrorGuaranteed), Pat(&'hir Ty<'hir>, &'hir TyPat<'hir>), Infer(Unambig),
}
Expand description

The various kinds of types recognized by the compiler.

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InferDelegation(DefId, InferDelegationKind)

Actual type should be inherited from DefId signature

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Slice(&'hir Ty<'hir>)

A variable length slice (i.e., [T]).

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Array(&'hir Ty<'hir>, &'hir ConstArg<'hir>)

A fixed length array (i.e., [T; n]).

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Ptr(MutTy<'hir>)

A raw pointer (i.e., *const T or *mut T).

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Ref(&'hir Lifetime, MutTy<'hir>)

A reference (i.e., &'a T or &'a mut T).

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BareFn(&'hir BareFnTy<'hir>)

A bare function (e.g., fn(usize) -> bool).

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UnsafeBinder(&'hir UnsafeBinderTy<'hir>)

An unsafe binder type (e.g. unsafe<'a> Foo<'a>).

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Never

The never type (!).

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Tup(&'hir [Ty<'hir>])

A tuple ((A, B, C, D, ...)).

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Path(QPath<'hir>)

A path to a type definition (module::module::...::Type), or an associated type (e.g., <Vec<T> as Trait>::Type or <T>::Target).

Type parameters may be stored in each PathSegment.

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OpaqueDef(&'hir OpaqueTy<'hir>)

An opaque type definition itself. This is only used for impl Trait.

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TraitAscription(GenericBounds<'hir>)

A trait ascription type, which is impl Trait within a local binding.

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TraitObject(&'hir [PolyTraitRef<'hir>], TaggedRef<'hir, Lifetime, TraitObjectSyntax>)

A trait object type Bound1 + Bound2 + Bound3 where Bound is a trait or a lifetime.

We use pointer tagging to represent a &'hir Lifetime and TraitObjectSyntax pair as otherwise this type being repr(C) would result in TyKind increasing in size.

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Typeof(&'hir AnonConst)

Unused for now.

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Err(ErrorGuaranteed)

Placeholder for a type that has failed to be defined.

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Pat(&'hir Ty<'hir>, &'hir TyPat<'hir>)

Pattern types (pattern_type!(u32 is 1..))

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Infer(Unambig)

TyKind::Infer means the type should be inferred instead of it having been specified. This can appear anywhere in a type.

This variant is not always used to represent inference types, sometimes GenericArg::Infer is used instead.

Trait Implementations§

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impl<'hir, Unambig: Clone> Clone for TyKind<'hir, Unambig>

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fn clone(&self) -> TyKind<'hir, Unambig>

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<'hir, Unambig: Debug> Debug for TyKind<'hir, Unambig>

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

Formats the value using the given formatter. Read more
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impl<'hir, Unambig, __CTX> HashStable<__CTX> for TyKind<'hir, Unambig>
where __CTX: HashStableContext, Unambig: HashStable<__CTX>,

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fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)

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impl<'hir, Unambig: Copy> Copy for TyKind<'hir, Unambig>

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impl<'hir, Unambig> DynSend for TyKind<'hir, Unambig>
where Unambig: DynSend,

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impl<'hir, Unambig> DynSync for TyKind<'hir, Unambig>
where Unambig: DynSync,

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impl<'hir, Unambig> Freeze for TyKind<'hir, Unambig>
where Unambig: Freeze,

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impl<'hir, Unambig> RefUnwindSafe for TyKind<'hir, Unambig>
where Unambig: RefUnwindSafe,

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impl<'hir, Unambig> Send for TyKind<'hir, Unambig>
where Unambig: Send,

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impl<'hir, Unambig> Sync for TyKind<'hir, Unambig>
where Unambig: Sync,

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impl<'hir, Unambig> Unpin for TyKind<'hir, Unambig>
where Unambig: Unpin,

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impl<'hir, Unambig> UnwindSafe for TyKind<'hir, Unambig>
where Unambig: 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<'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, dst: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. 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<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<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<'a, T> Captures<'a> for T
where T: ?Sized,

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