Struct chalk_solve::rust_ir::AssociatedTyValue

pub struct AssociatedTyValue<I: Interner> {
    pub impl_id: ImplId<I>,
    pub associated_ty_id: AssocTypeId<I>,
    pub value: Binders<AssociatedTyValueBound<I>>,
}

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

impl<I: Clone + Interner> Clone for AssociatedTyValue<I>

fn clone(&self) -> AssociatedTyValue<I>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<I: Debug + Interner> Debug for AssociatedTyValue<I>

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

Formats the value using the given formatter.

impl<I: Hash + Interner> Hash for AssociatedTyValue<I>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where
    H: Hasher,
    Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<I: PartialEq + Interner> PartialEq<AssociatedTyValue<I>> for AssociatedTyValue<I>

fn eq(&self, other: &AssociatedTyValue<I>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<I: Interner> ToProgramClauses<I> for AssociatedTyValue<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)
}

impl<I: Interner> TypeFoldable<I> for AssociatedTyValue<I>

fn try_fold_with<E>(
    self,
    folder: &mut dyn FallibleTypeFolder<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.

fn fold_with(
    self,
    folder: &mut dyn TypeFolder<I, Error = Infallible>,
    outer_binder: DebruijnIndex
) -> Self

A convenient alternative to try_fold_with for use with infallible folders. Do not override this method, to ensure coherence with try_fold_with.

impl<I: Interner> TypeVisitable<I> for AssociatedTyValue<I>

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.

impl<I: Eq + Interner> Eq for AssociatedTyValue<I>

impl<I: Interner> StructuralEq for AssociatedTyValue<I>

impl<I: Interner> StructuralPartialEq for AssociatedTyValue<I>