Enum TyKind

pub enum TyKind<'hir> {
    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>], &'hir Lifetime, TraitObjectSyntax),
    Typeof(&'hir AnonConst),
    Infer,
    Err(ErrorGuaranteed),
    Pat(&'hir Ty<'hir>, &'hir Pat<'hir>),
}

The various kinds of types recognized by the compiler.

Variants

InferDelegation(DefId, InferDelegationKind)

Actual type should be inherited from DefId signature

Slice(&'hir Ty<'hir>)

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

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

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

Ptr(MutTy<'hir>)

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

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

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

BareFn(&'hir BareFnTy<'hir>)

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

UnsafeBinder(&'hir UnsafeBinderTy<'hir>)

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

Never

The never type (!).

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

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

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.

OpaqueDef(&'hir OpaqueTy<'hir>)

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

TraitAscription(GenericBounds<'hir>)

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

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

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

Typeof(&'hir AnonConst)

Unused for now.

Infer

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

Note: Not all inferred types are represented as TyKind::Infer. In cases where it is ambiguous whether a generic arg is a type or a const, inference variables are represented as GenericArg::Infer instead.

Err(ErrorGuaranteed)

Placeholder for a type that has failed to be defined.

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

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

Trait Implementations

impl<'hir> Clone for TyKind<'hir>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'hir> Debug for TyKind<'hir>

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

Formats the value using the given formatter.

impl<'hir, __CTX> HashStable<__CTX> for TyKind<'hir>

where __CTX: HashStableContext,

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

impl<'hir> Copy for TyKind<'hir>

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: 32 bytes

Size for each variant:

• InferDelegation: 31 bytes
• Slice: 15 bytes
• Array: 23 bytes
• Ptr: 23 bytes
• Ref: 31 bytes
• BareFn: 15 bytes
• UnsafeBinder: 15 bytes
• Never: 0 bytes
• Tup: 23 bytes
• Path: 31 bytes
• OpaqueDef: 15 bytes
• TraitAscription: 23 bytes
• TraitObject: 31 bytes
• Typeof: 15 bytes
• Infer: 0 bytes
• Err: 0 bytes
• Pat: 23 bytes