pub struct TraitRef<I: Interner> {
pub trait_id: TraitId<I>,
pub substitution: Substitution<I>,
}
Expand description
A trait reference describes the relationship between a type and a trait. This can be used in two forms:
P0: Trait<P1..Pn>
(e.g.i32: Copy
), which mentions that the type implements the trait.<P0 as Trait<P1..Pn>>
(e.g.i32 as Copy
), which casts the type to that specific trait.
Fields
trait_id: TraitId<I>
The trait id.
substitution: Substitution<I>
The substitution, containing both the Self
type and the parameters.
Implementations
sourceimpl<I: Interner> TraitRef<I>
impl<I: Interner> TraitRef<I>
sourcepub fn type_parameters(&self, interner: I) -> impl Iterator<Item = Ty<I>> + '_
pub fn type_parameters(&self, interner: I) -> impl Iterator<Item = Ty<I>> + '_
Gets all type parameters in this trait ref, including Self
.
sourcepub fn self_type_parameter(&self, interner: I) -> Ty<I>
pub fn self_type_parameter(&self, interner: I) -> Ty<I>
Gets the type parameters of the Self
type in this trait ref.
sourcepub fn well_formed(self) -> WellFormed<I>
pub fn well_formed(self) -> WellFormed<I>
Construct a WellFormed
using this trait ref.
Trait Implementations
sourceimpl<I: Interner> CastTo<WhereClause<I>> for TraitRef<I>
impl<I: Interner> CastTo<WhereClause<I>> for TraitRef<I>
sourcefn cast_to(self, _interner: I) -> WhereClause<I>
fn cast_to(self, _interner: I) -> WhereClause<I>
Cast a value to type T
.
sourceimpl<I: Interner> HasInterner for TraitRef<I>
impl<I: Interner> HasInterner for TraitRef<I>
type Interner = I
type Interner = I
The interner associated with the type.
sourceimpl<I: Interner> TypeFoldable<I> for TraitRef<I>
impl<I: Interner> TypeFoldable<I> for TraitRef<I>
sourcefn fold_with<E>(
self,
folder: &mut dyn TypeFolder<I, Error = E>,
outer_binder: DebruijnIndex
) -> Result<Self, E>
fn fold_with<E>(
self,
folder: &mut dyn TypeFolder<I, Error = E>,
outer_binder: DebruijnIndex
) -> Result<Self, E>
Apply the given folder folder
to self
; binders
is the
number of binders that are in scope when beginning the
folder. Typically binders
starts as 0, but is adjusted when
we encounter Binders<T>
in the IR or other similar
constructs. Read more
sourceimpl<I: Interner> TypeVisitable<I> for TraitRef<I>
impl<I: Interner> TypeVisitable<I> for TraitRef<I>
sourcefn visit_with<B>(
&self,
visitor: &mut dyn TypeVisitor<I, BreakTy = B>,
outer_binder: DebruijnIndex
) -> ControlFlow<B>
fn visit_with<B>(
&self,
visitor: &mut dyn TypeVisitor<I, BreakTy = B>,
outer_binder: DebruijnIndex
) -> ControlFlow<B>
Apply the given visitor visitor
to self
; binders
is the
number of binders that are in scope when beginning the
visitor. Typically binders
starts as 0, but is adjusted when
we encounter Binders<T>
in the IR or other similar
constructs. Read more
impl<I: Interner> Copy for TraitRef<I> where
I::InternedSubstitution: Copy,
impl<I: Eq + Interner> Eq for TraitRef<I>
impl<I: Interner> StructuralEq for TraitRef<I>
impl<I: Interner> StructuralPartialEq for TraitRef<I>
Auto Trait Implementations
impl<I> RefUnwindSafe for TraitRef<I> where
<I as Interner>::DefId: RefUnwindSafe,
<I as Interner>::InternedSubstitution: RefUnwindSafe,
impl<I> Send for TraitRef<I> where
<I as Interner>::DefId: Send,
<I as Interner>::InternedSubstitution: Send,
impl<I> Sync for TraitRef<I> where
<I as Interner>::DefId: Sync,
<I as Interner>::InternedSubstitution: Sync,
impl<I> Unpin for TraitRef<I> where
<I as Interner>::DefId: Unpin,
<I as Interner>::InternedSubstitution: Unpin,
impl<I> UnwindSafe for TraitRef<I> where
<I as Interner>::DefId: UnwindSafe,
<I as Interner>::InternedSubstitution: UnwindSafe,
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<T> Cast for T
impl<T> Cast for T
sourcefn cast<U>(self, interner: U::Interner) -> U where
Self: CastTo<U>,
U: HasInterner,
fn cast<U>(self, interner: U::Interner) -> U where
Self: CastTo<U>,
U: HasInterner,
Cast a value to type U
using CastTo
.
sourceimpl<T, I> CastTo<DomainGoal<I>> for T where
T: CastTo<WhereClause<I>>,
I: Interner,
impl<T, I> CastTo<DomainGoal<I>> for T where
T: CastTo<WhereClause<I>>,
I: Interner,
sourcefn cast_to(self, interner: I) -> DomainGoal<I>
fn cast_to(self, interner: I) -> DomainGoal<I>
Cast a value to type T
.
sourceimpl<T, I> CastTo<ProgramClause<I>> for T where
T: CastTo<DomainGoal<I>>,
I: Interner,
impl<T, I> CastTo<ProgramClause<I>> for T where
T: CastTo<DomainGoal<I>>,
I: Interner,
sourcefn cast_to(self, interner: I) -> ProgramClause<I>
fn cast_to(self, interner: I) -> ProgramClause<I>
Cast a value to type T
.
sourceimpl<T, I> CouldMatch<T> for T where
T: Zip<I> + HasInterner<Interner = I> + ?Sized,
I: Interner,
impl<T, I> CouldMatch<T> for T where
T: Zip<I> + HasInterner<Interner = I> + ?Sized,
I: Interner,
sourcefn could_match(
&self,
interner: I,
db: &dyn UnificationDatabase<I>,
other: &T
) -> bool
fn could_match(
&self,
interner: I,
db: &dyn UnificationDatabase<I>,
other: &T
) -> bool
Checks whether self
and other
could possibly match.
sourceimpl<T, I> Shift<I> for T where
T: TypeFoldable<I>,
I: Interner,
impl<T, I> Shift<I> for T where
T: TypeFoldable<I>,
I: Interner,
sourcefn shifted_in(self, interner: I) -> T
fn shifted_in(self, interner: I) -> T
Shifts this term in one level of binders.
sourcefn shifted_in_from(self, interner: I, source_binder: DebruijnIndex) -> T
fn shifted_in_from(self, interner: I, source_binder: DebruijnIndex) -> T
Shifts a term valid at outer_binder
so that it is
valid at the innermost binder. See DebruijnIndex::shifted_in_from
for a detailed explanation. Read more
sourcefn shifted_out_to(
self,
interner: I,
target_binder: DebruijnIndex
) -> Result<T, NoSolution>
fn shifted_out_to(
self,
interner: I,
target_binder: DebruijnIndex
) -> Result<T, NoSolution>
Shifts a term valid at the innermost binder so that it is
valid at outer_binder
. See DebruijnIndex::shifted_out_to
for a detailed explanation. Read more
sourcefn shifted_out(self, interner: I) -> Result<T, NoSolution>
fn shifted_out(self, interner: I) -> Result<T, NoSolution>
Shifts this term out one level of binders.
sourceimpl<T, I> VisitExt<I> for T where
I: Interner,
T: TypeVisitable<I>,
impl<T, I> VisitExt<I> for T where
I: Interner,
T: TypeVisitable<I>,
sourcefn has_free_vars(&self, interner: I) -> bool
fn has_free_vars(&self, interner: I) -> bool
Check whether there are free (non-bound) variables.