pub enum TyKind<I: Interner> {
Show 23 variants
Adt(AdtId<I>, Substitution<I>),
AssociatedType(AssocTypeId<I>, Substitution<I>),
Scalar(Scalar),
Tuple(usize, Substitution<I>),
Array(Ty<I>, Const<I>),
Slice(Ty<I>),
Raw(Mutability, Ty<I>),
Ref(Mutability, Lifetime<I>, Ty<I>),
OpaqueType(OpaqueTyId<I>, Substitution<I>),
FnDef(FnDefId<I>, Substitution<I>),
Str,
Never,
Closure(ClosureId<I>, Substitution<I>),
Coroutine(CoroutineId<I>, Substitution<I>),
CoroutineWitness(CoroutineId<I>, Substitution<I>),
Foreign(ForeignDefId<I>),
Error,
Placeholder(PlaceholderIndex),
Dyn(DynTy<I>),
Alias(AliasTy<I>),
Function(FnPointer<I>),
BoundVar(BoundVar),
InferenceVar(InferenceVar, TyVariableKind),
}
Expand description
Type data, which holds the actual type information.
Variants§
Adt(AdtId<I>, Substitution<I>)
Abstract data types, i.e., structs, unions, or enumerations.
For example, a type like Vec<T>
.
AssociatedType(AssocTypeId<I>, Substitution<I>)
an associated type like Iterator::Item
; see AssociatedType
for details
Scalar(Scalar)
a scalar type like bool
or u32
Tuple(usize, Substitution<I>)
a tuple of the given arity
Array(Ty<I>, Const<I>)
an array type like [T; N]
Slice(Ty<I>)
a slice type like [T]
Raw(Mutability, Ty<I>)
a raw pointer type like *const T
or *mut T
Ref(Mutability, Lifetime<I>, Ty<I>)
a reference type like &T
or &mut T
OpaqueType(OpaqueTyId<I>, Substitution<I>)
a placeholder for opaque types like impl Trait
FnDef(FnDefId<I>, Substitution<I>)
a function definition
Str
the string primitive type
Never
the never type !
Closure(ClosureId<I>, Substitution<I>)
A closure.
Coroutine(CoroutineId<I>, Substitution<I>)
A coroutine.
CoroutineWitness(CoroutineId<I>, Substitution<I>)
A coroutine witness.
Foreign(ForeignDefId<I>)
foreign types
Error
This can be used to represent an error, e.g. during name resolution of a type. Chalk itself will not produce this, just pass it through when given.
Placeholder(PlaceholderIndex)
instantiated from a universally quantified type, e.g., from
forall<T> { .. }
. Stands in as a representative of “some
unknown type”.
Dyn(DynTy<I>)
A “dyn” type is a trait object type created via the “dyn Trait” syntax. In the chalk parser, the traits that the object represents is parsed as a QuantifiedInlineBound, and is then changed to a list of where clauses during lowering.
See the Opaque
variant for a discussion about the use of
binders here.
Alias(AliasTy<I>)
An “alias” type represents some form of type alias, such as:
- An associated type projection like
<T as Iterator>::Item
impl Trait
types- Named type aliases like
type Foo<X> = Vec<X>
Function(FnPointer<I>)
A function type such as for<'a> fn(&'a u32)
.
Note that “higher-ranked” types (starting with for<>
) are either
function types or dyn types, and do not appear otherwise in Rust
surface syntax.
BoundVar(BoundVar)
References the binding at the given depth. The index is a [de Bruijn index], so it counts back through the in-scope binders.
InferenceVar(InferenceVar, TyVariableKind)
Inference variable defined in the current inference context.
Implementations§
Trait Implementations§
source§impl<I: Interner> HasInterner for TyKind<I>
impl<I: Interner> HasInterner for TyKind<I>
source§impl<I: PartialEq + Interner> PartialEq for TyKind<I>
impl<I: PartialEq + Interner> PartialEq for TyKind<I>
impl<I: Interner> Copy for TyKind<I>where
I::InternedLifetime: Copy,
I::InternedSubstitution: Copy,
I::InternedVariableKinds: Copy,
I::InternedQuantifiedWhereClauses: Copy,
I::InternedType: Copy,
I::InternedConst: Copy,
impl<I: Eq + Interner> Eq for TyKind<I>
impl<I: Interner> StructuralPartialEq for TyKind<I>
Auto Trait Implementations§
impl<I> Freeze for TyKind<I>where
<I as Interner>::InternedAdtId: Freeze,
<I as Interner>::InternedSubstitution: Freeze,
<I as Interner>::DefId: Freeze,
<I as Interner>::InternedType: Freeze,
<I as Interner>::InternedConst: Freeze,
<I as Interner>::InternedLifetime: Freeze,
<I as Interner>::FnAbi: Freeze,
<I as Interner>::InternedVariableKinds: Freeze,
<I as Interner>::InternedQuantifiedWhereClauses: Freeze,
impl<I> RefUnwindSafe for TyKind<I>where
<I as Interner>::InternedAdtId: RefUnwindSafe,
<I as Interner>::InternedSubstitution: RefUnwindSafe,
<I as Interner>::DefId: RefUnwindSafe,
<I as Interner>::InternedType: RefUnwindSafe,
<I as Interner>::InternedConst: RefUnwindSafe,
<I as Interner>::InternedLifetime: RefUnwindSafe,
<I as Interner>::FnAbi: RefUnwindSafe,
<I as Interner>::InternedVariableKinds: RefUnwindSafe,
<I as Interner>::InternedQuantifiedWhereClauses: RefUnwindSafe,
impl<I> Send for TyKind<I>where
<I as Interner>::InternedAdtId: Send,
<I as Interner>::InternedSubstitution: Send,
<I as Interner>::DefId: Send,
<I as Interner>::InternedType: Send,
<I as Interner>::InternedConst: Send,
<I as Interner>::InternedLifetime: Send,
<I as Interner>::FnAbi: Send,
<I as Interner>::InternedVariableKinds: Send,
<I as Interner>::InternedQuantifiedWhereClauses: Send,
impl<I> Sync for TyKind<I>where
<I as Interner>::InternedAdtId: Sync,
<I as Interner>::InternedSubstitution: Sync,
<I as Interner>::DefId: Sync,
<I as Interner>::InternedType: Sync,
<I as Interner>::InternedConst: Sync,
<I as Interner>::InternedLifetime: Sync,
<I as Interner>::FnAbi: Sync,
<I as Interner>::InternedVariableKinds: Sync,
<I as Interner>::InternedQuantifiedWhereClauses: Sync,
impl<I> Unpin for TyKind<I>where
<I as Interner>::InternedAdtId: Unpin,
<I as Interner>::InternedSubstitution: Unpin,
<I as Interner>::DefId: Unpin,
<I as Interner>::InternedType: Unpin,
<I as Interner>::InternedConst: Unpin,
<I as Interner>::InternedLifetime: Unpin,
<I as Interner>::FnAbi: Unpin,
<I as Interner>::InternedVariableKinds: Unpin,
<I as Interner>::InternedQuantifiedWhereClauses: Unpin,
impl<I> UnwindSafe for TyKind<I>where
<I as Interner>::InternedAdtId: UnwindSafe,
<I as Interner>::InternedSubstitution: UnwindSafe,
<I as Interner>::DefId: UnwindSafe,
<I as Interner>::InternedType: UnwindSafe,
<I as Interner>::InternedConst: UnwindSafe,
<I as Interner>::InternedLifetime: UnwindSafe,
<I as Interner>::FnAbi: UnwindSafe,
<I as Interner>::InternedVariableKinds: UnwindSafe,
<I as Interner>::InternedQuantifiedWhereClauses: UnwindSafe,
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<T> CloneToUninit for Twhere
T: Copy,
impl<T> CloneToUninit for Twhere
T: Copy,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
)source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§default unsafe fn clone_to_uninit(&self, dst: *mut T)
default unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
)