rustc_ast::ast

Enum TyKind

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pub enum TyKind {
Show 20 variants Slice(P<Ty>), Array(P<Ty>, AnonConst), Ptr(MutTy), Ref(Option<Lifetime>, MutTy), PinnedRef(Option<Lifetime>, MutTy), BareFn(P<BareFnTy>), Never, Tup(ThinVec<P<Ty>>), Path(Option<P<QSelf>>, Path), TraitObject(GenericBounds, TraitObjectSyntax), ImplTrait(NodeId, GenericBounds), Paren(P<Ty>), Typeof(AnonConst), Infer, ImplicitSelf, MacCall(P<MacCall>), CVarArgs, Pat(P<Ty>, P<Pat>), Dummy, Err(ErrorGuaranteed),
}
Expand description

The various kinds of type recognized by the compiler.

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Slice(P<Ty>)

A variable-length slice ([T]).

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Array(P<Ty>, AnonConst)

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

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Ptr(MutTy)

A raw pointer (*const T or *mut T).

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Ref(Option<Lifetime>, MutTy)

A reference (&'a T or &'a mut T).

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PinnedRef(Option<Lifetime>, MutTy)

A pinned reference (&'a pin const T or &'a pin mut T).

Desugars into Pin<&'a T> or Pin<&'a mut T>.

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BareFn(P<BareFnTy>)

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

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Never

The never type (!).

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Tup(ThinVec<P<Ty>>)

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

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Path(Option<P<QSelf>>, Path)

A path (module::module::...::Type), optionally “qualified”, e.g., <Vec<T> as SomeTrait>::SomeType.

Type parameters are stored in the Path itself.

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TraitObject(GenericBounds, TraitObjectSyntax)

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

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ImplTrait(NodeId, GenericBounds)

An impl Bound1 + Bound2 + Bound3 type where Bound is a trait or a lifetime.

The NodeId exists to prevent lowering from having to generate NodeIds on the fly, which would complicate the generation of opaque type Foo = impl Trait items significantly.

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Paren(P<Ty>)

No-op; kept solely so that we can pretty-print faithfully.

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Typeof(AnonConst)

Unused for now.

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Infer

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

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ImplicitSelf

Inferred type of a self or &self argument in a method.

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MacCall(P<MacCall>)

A macro in the type position.

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CVarArgs

Placeholder for a va_list.

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Pat(P<Ty>, P<Pat>)

Pattern types like pattern_type!(u32 is 1..=), which is the same as NonZero<u32>, just as part of the type system.

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Dummy

Sometimes we need a dummy value when no error has occurred.

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Err(ErrorGuaranteed)

Placeholder for a kind that has failed to be defined.

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impl TyKind

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pub fn is_implicit_self(&self) -> bool

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pub fn is_unit(&self) -> bool

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pub fn is_simple_path(&self) -> Option<Symbol>

Trait Implementations§

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impl Clone for TyKind

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fn clone(&self) -> TyKind

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 Debug for TyKind

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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<__D: SpanDecoder> Decodable<__D> for TyKind

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fn decode(__decoder: &mut __D) -> Self

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impl<__E: SpanEncoder> Encodable<__E> for TyKind

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fn encode(&self, __encoder: &mut __E)

Auto Trait Implementations§

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impl DynSend for TyKind

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impl DynSync for TyKind

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impl Freeze for TyKind

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impl !RefUnwindSafe for TyKind

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impl !Send for TyKind

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impl !Sync for TyKind

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impl Unpin for TyKind

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impl !UnwindSafe for TyKind

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> 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<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: 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: 40 bytes

Size for each variant:

  • Slice: 15 bytes
  • Array: 31 bytes
  • Ptr: 23 bytes
  • Ref: 39 bytes
  • PinnedRef: 39 bytes
  • BareFn: 15 bytes
  • Never: 0 bytes
  • Tup: 15 bytes
  • Path: 39 bytes
  • TraitObject: 31 bytes
  • ImplTrait: 31 bytes
  • Paren: 15 bytes
  • Typeof: 23 bytes
  • Infer: 0 bytes
  • ImplicitSelf: 0 bytes
  • MacCall: 15 bytes
  • CVarArgs: 0 bytes
  • Pat: 23 bytes
  • Dummy: 0 bytes
  • Err: 0 bytes