Struct chalk_solve::rust_ir::AssociatedTyValue [−][src]
pub struct AssociatedTyValue<I: Interner> {
pub impl_id: ImplId<I>,
pub associated_ty_id: AssocTypeId<I>,
pub value: Binders<AssociatedTyValueBound<I>>,
}
Expand description
Represents the value of an associated type that is assigned from within some impl.
impl Iterator for Foo {
type Item = XXX; // <-- represents this line!
}
Fields
impl_id: ImplId<I>
Impl in which this associated type value is found. You might need to look at this to find the generic parameters defined on the impl, for example.
impl Iterator for Foo { // <-- refers to this impl
type Item = XXX; // <-- (where this is self)
}
associated_ty_id: AssocTypeId<I>
Associated type being defined.
impl Iterator for Foo {
type Item = XXX; // <-- (where this is self)
}
...
trait Iterator {
type Item; // <-- refers to this declaration here!
}
value: Binders<AssociatedTyValueBound<I>>
Additional binders declared on the associated type itself, beyond those from the impl. This would be empty for normal associated types, but non-empty for generic associated types.
impl<T> Iterable for Vec<T> {
type Iter<'a> = vec::Iter<'a, T>;
// ^^^^ refers to these generics here
}
Trait Implementations
type Result = AssociatedTyValue<I>
type Result = AssociatedTyValue<I>
The type of value that will be produced once folding is done.
Typically this is Self
, unless Self
contains borrowed
values, in which case owned values are produced (for example,
one can fold over a &T
value where T: Fold
, in which case
you get back a T
, not a &T
). Read more
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
This method tests for self
and other
values to be equal, and is used
by ==
. Read more
This method tests for !=
.
fn to_program_clauses(
&self,
builder: &mut ClauseBuilder<'_, I>,
_environment: &Environment<I>
)
fn to_program_clauses(
&self,
builder: &mut ClauseBuilder<'_, I>,
_environment: &Environment<I>
)
Given the following trait:
trait Iterable {
type IntoIter<'a>: 'a;
}
Then for the following impl:
impl<T> Iterable for Vec<T> where T: Clone {
type IntoIter<'a> = Iter<'a, T>;
}
we generate:
-- Rule Normalize-From-Impl
forall<'a, T> {
Normalize(<Vec<T> as Iterable>::IntoIter<'a> -> Iter<'a, T>>) :-
Implemented(T: Clone), // (1)
Implemented(Iter<'a, T>: 'a). // (2)
}
fn visit_with<'i, B>(
&self,
visitor: &mut dyn Visitor<'i, I, BreakTy = B>,
outer_binder: DebruijnIndex
) -> ControlFlow<B> where
I: 'i,
fn visit_with<'i, B>(
&self,
visitor: &mut dyn Visitor<'i, I, BreakTy = B>,
outer_binder: DebruijnIndex
) -> ControlFlow<B> where
I: 'i,
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
Auto Trait Implementations
impl<I> RefUnwindSafe for AssociatedTyValue<I> where
<I as Interner>::DefId: RefUnwindSafe,
<I as Interner>::InternedType: RefUnwindSafe,
<I as Interner>::InternedVariableKinds: RefUnwindSafe,
impl<I> Send for AssociatedTyValue<I> where
<I as Interner>::DefId: Send,
<I as Interner>::InternedType: Send,
<I as Interner>::InternedVariableKinds: Send,
impl<I> Sync for AssociatedTyValue<I> where
<I as Interner>::DefId: Sync,
<I as Interner>::InternedType: Sync,
<I as Interner>::InternedVariableKinds: Sync,
impl<I> Unpin for AssociatedTyValue<I> where
<I as Interner>::DefId: Unpin,
<I as Interner>::InternedType: Unpin,
<I as Interner>::InternedVariableKinds: Unpin,
impl<I> UnwindSafe for AssociatedTyValue<I> where
<I as Interner>::DefId: UnwindSafe,
<I as Interner>::InternedType: UnwindSafe,
<I as Interner>::InternedVariableKinds: UnwindSafe,
Blanket Implementations
Mutably borrows from an owned value. Read more
fn cast<U>(self, interner: &<U as HasInterner>::Interner) -> U where
Self: CastTo<U>,
U: HasInterner,
fn cast<U>(self, interner: &<U as HasInterner>::Interner) -> U where
Self: CastTo<U>,
U: HasInterner,
Cast a value to type U
using CastTo
.
Compare self to key
and return true
if they are equal.
Instruments this type with the provided Span
, returning an
Instrumented
wrapper. Read more
Shifts this term in one level of binders.
pub fn shifted_in_from(
self,
interner: &I,
source_binder: DebruijnIndex
) -> <T as Fold<I>>::Result
pub fn shifted_in_from(
self,
interner: &I,
source_binder: DebruijnIndex
) -> <T as Fold<I>>::Result
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
pub fn shifted_out_to(
self,
interner: &I,
target_binder: DebruijnIndex
) -> Result<<T as Fold<I>>::Result, NoSolution>
pub fn shifted_out_to(
self,
interner: &I,
target_binder: DebruijnIndex
) -> Result<<T as Fold<I>>::Result, 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
Shifts this term out one level of binders.