Enum rustc_ast::ast::TyKind[][src]

pub enum TyKind {
Show 17 variants Slice(P<Ty>), Array(P<Ty>, AnonConst), Ptr(MutTy), Rptr(Option<Lifetime>, MutTy), BareFn(P<BareFnTy>), Never, Tup(Vec<P<Ty>>), Path(Option<QSelf>, Path), TraitObject(GenericBoundsTraitObjectSyntax), ImplTrait(NodeIdGenericBounds), Paren(P<Ty>), Typeof(AnonConst), Infer, ImplicitSelf, MacCall(MacCall), Err, CVarArgs,
Expand description

The various kinds of type recognized by the compiler.



A variable-length slice ([T]).

Tuple Fields of Slice

0: P<Ty>
Array(P<Ty>, AnonConst)

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

Tuple Fields of Array

0: P<Ty>1: AnonConst

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

Tuple Fields of Ptr

0: MutTy
Rptr(Option<Lifetime>, MutTy)

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

Tuple Fields of Rptr

0: Option<Lifetime>1: MutTy

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

Tuple Fields of BareFn

0: P<BareFnTy>

The never type (!).


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

Tuple Fields of Tup

0: Vec<P<Ty>>
Path(Option<QSelf>, Path)

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

Type parameters are stored in the Path itself.

Tuple Fields of Path

0: Option<QSelf>1: Path

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

Tuple Fields of TraitObject

0: GenericBounds1: TraitObjectSyntax

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.

Tuple Fields of ImplTrait

0: NodeId1: GenericBounds

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

Tuple Fields of Paren

0: P<Ty>

Unused for now.

Tuple Fields of Typeof

0: AnonConst

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


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


A macro in the type position.

Tuple Fields of MacCall

0: MacCall

Placeholder for a kind that has failed to be defined.


Placeholder for a va_list.


Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Performs the conversion.

Performs the conversion.

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.


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: 72 bytes

Size for each variant: