[−][src]Enum ra_ap_hir_ty::Ty
A type.
See also the TyKind
enum in rustc (librustc/ty/sty.rs), which represents
the same thing (but in a different way).
This should be cheap to clone.
Variants
Apply(ApplicationTy)
A nominal type with (maybe 0) type parameters. This might be a primitive
type like bool
, a struct, tuple, function pointer, reference or
several other things.
Projection(ProjectionTy)
A "projection" type corresponds to an (unnormalized)
projection like <P0 as Trait<P1..Pn>>::Foo
. Note that the
trait and all its parameters are fully known.
Opaque(OpaqueTy)
An opaque type (impl Trait
).
This is currently only used for return type impl trait; each instance of
impl Trait
in a return type gets its own ID.
Placeholder(TypeParamId)
A placeholder for a type parameter; for example, T
in fn f<T>(x: T) {}
when we're type-checking the body of that function. In this
situation, we know this stands for some type, but don't know the exact
type.
Bound(BoundVar)
A bound type variable. This is used in various places: when representing
some polymorphic type like the type of function fn f<T>
, the type
parameters get turned into variables; during trait resolution, inference
variables get turned into bound variables and back; and in Dyn
the
Self
type is represented with a bound variable as well.
Infer(InferTy)
A type variable used during type checking.
Dyn(Arc<[GenericPredicate]>)
A trait object (dyn Trait
or bare Trait
in pre-2018 Rust).
The predicates are quantified over the Self
type, i.e. Ty::Bound(0)
represents the Self
type inside the bounds. This is currently
implicit; Chalk has the Binders
struct to make it explicit, but it
didn't seem worth the overhead yet.
A placeholder for a type which could not be computed; this is propagated to avoid useless error messages. Doubles as a placeholder where type variables are inserted before type checking, since we want to try to infer a better type here anyway -- for the IDE use case, we want to try to infer as much as possible even in the presence of type errors.
Implementations
impl Ty
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pub fn def_crates(
&self,
db: &dyn HirDatabase,
cur_crate: CrateId
) -> Option<ArrayVec<[CrateId; 2]>>
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&self,
db: &dyn HirDatabase,
cur_crate: CrateId
) -> Option<ArrayVec<[CrateId; 2]>>
impl Ty
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pub fn from_hir(ctx: &TyLoweringContext<'_>, type_ref: &TypeRef) -> Self
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pub fn from_hir_ext(
ctx: &TyLoweringContext<'_>,
type_ref: &TypeRef
) -> (Self, Option<TypeNs>)
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ctx: &TyLoweringContext<'_>,
type_ref: &TypeRef
) -> (Self, Option<TypeNs>)
impl Ty
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pub fn simple(ctor: TypeCtor) -> Ty
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pub fn apply_one(ctor: TypeCtor, param: Ty) -> Ty
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pub fn apply(ctor: TypeCtor, parameters: Substs) -> Ty
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pub fn unit() -> Self
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pub fn fn_ptr(sig: FnSig) -> Self
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pub fn as_reference(&self) -> Option<(&Ty, Mutability)>
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pub fn as_reference_or_ptr(&self) -> Option<(&Ty, Rawness, Mutability)>
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pub fn strip_references(&self) -> &Ty
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pub fn as_adt(&self) -> Option<(AdtId, &Substs)>
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pub fn as_tuple(&self) -> Option<&Substs>
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pub fn is_never(&self) -> bool
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pub fn dyn_trait_ref(&self) -> Option<&TraitRef>
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If this is a dyn Trait
type, this returns the Trait
part.
pub fn dyn_trait(&self) -> Option<TraitId>
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If this is a dyn Trait
, returns that trait.
pub fn callable_sig(&self, db: &dyn HirDatabase) -> Option<FnSig>
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pub fn apply_substs(self, substs: Substs) -> Ty
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If this is a type with type parameters (an ADT or function), replaces
the Substs
for these type parameters with the given ones. (So e.g. if
self
is Option<_>
and the substs contain u32
, we'll have
Option<u32>
afterwards.)
pub fn substs(&self) -> Option<Substs>
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Returns the type parameters of this type if it has some (i.e. is an ADT
or function); so if self
is Option<u32>
, this returns the u32
.
pub fn impl_trait_bounds(
&self,
db: &dyn HirDatabase
) -> Option<Vec<GenericPredicate>>
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&self,
db: &dyn HirDatabase
) -> Option<Vec<GenericPredicate>>
pub fn associated_type_parent_trait(
&self,
db: &dyn HirDatabase
) -> Option<TraitId>
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&self,
db: &dyn HirDatabase
) -> Option<TraitId>
Trait Implementations
impl Clone for Ty
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impl Debug for Ty
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impl Eq for Ty
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impl Hash for Ty
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fn hash<__H: Hasher>(&self, state: &mut __H)
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fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
1.3.0[src]
H: Hasher,
impl<'_> HirDisplay for &'_ Ty
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fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError>
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fn display<'a>(&'a self, db: &'a dyn HirDatabase) -> HirDisplayWrapper<'a, Self> where
Self: Sized,
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Self: Sized,
fn display_truncated<'a>(
&'a self,
db: &'a dyn HirDatabase,
max_size: Option<usize>
) -> HirDisplayWrapper<'a, Self> where
Self: Sized,
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&'a self,
db: &'a dyn HirDatabase,
max_size: Option<usize>
) -> HirDisplayWrapper<'a, Self> where
Self: Sized,
fn display_source_code<'a>(
&'a self,
db: &'a dyn HirDatabase,
module_id: ModuleId
) -> Result<String, DisplaySourceCodeError>
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&'a self,
db: &'a dyn HirDatabase,
module_id: ModuleId
) -> Result<String, DisplaySourceCodeError>
impl HirDisplay for Ty
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fn hir_fmt(&self, f: &mut HirFormatter<'_>) -> Result<(), HirDisplayError>
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fn display<'a>(&'a self, db: &'a dyn HirDatabase) -> HirDisplayWrapper<'a, Self> where
Self: Sized,
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Self: Sized,
fn display_truncated<'a>(
&'a self,
db: &'a dyn HirDatabase,
max_size: Option<usize>
) -> HirDisplayWrapper<'a, Self> where
Self: Sized,
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&'a self,
db: &'a dyn HirDatabase,
max_size: Option<usize>
) -> HirDisplayWrapper<'a, Self> where
Self: Sized,
fn display_source_code<'a>(
&'a self,
db: &'a dyn HirDatabase,
module_id: ModuleId
) -> Result<String, DisplaySourceCodeError>
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&'a self,
db: &'a dyn HirDatabase,
module_id: ModuleId
) -> Result<String, DisplaySourceCodeError>
impl PartialEq<Ty> for Ty
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impl StructuralEq for Ty
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impl StructuralPartialEq for Ty
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impl TypeWalk for Ty
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fn walk(&self, f: &mut impl FnMut(&Ty))
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fn walk_mut_binders(
&mut self,
f: &mut impl FnMut(&mut Ty, DebruijnIndex),
binders: DebruijnIndex
)
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&mut self,
f: &mut impl FnMut(&mut Ty, DebruijnIndex),
binders: DebruijnIndex
)
fn walk_mut(&mut self, f: &mut impl FnMut(&mut Ty))
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fn fold_binders(
self,
f: &mut impl FnMut(Ty, DebruijnIndex) -> Ty,
binders: DebruijnIndex
) -> Self where
Self: Sized,
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self,
f: &mut impl FnMut(Ty, DebruijnIndex) -> Ty,
binders: DebruijnIndex
) -> Self where
Self: Sized,
fn fold(self, f: &mut impl FnMut(Ty) -> Ty) -> Self where
Self: Sized,
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Self: Sized,
fn subst_bound_vars(self, substs: &Substs) -> Self where
Self: Sized,
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Self: Sized,
fn subst_bound_vars_at_depth(
self,
substs: &Substs,
depth: DebruijnIndex
) -> Self where
Self: Sized,
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self,
substs: &Substs,
depth: DebruijnIndex
) -> Self where
Self: Sized,
fn shift_bound_vars(self, n: DebruijnIndex) -> Self where
Self: Sized,
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Self: Sized,
Auto Trait Implementations
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Any for T where
T: Any,
T: Any,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> Cast for T
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fn cast<U>(self, interner: &<U as HasInterner>::Interner) -> U where
Self: CastTo<U>,
U: HasInterner,
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Self: CastTo<U>,
U: HasInterner,
impl<T> CloneAny for T where
T: Clone + Any,
T: Clone + Any,
impl<Q, K> Equivalent<K> for Q where
K: Borrow<Q> + ?Sized,
Q: Eq + ?Sized,
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K: Borrow<Q> + ?Sized,
Q: Eq + ?Sized,
fn equivalent(&self, key: &K) -> bool
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,