Struct chalk_ir::TraitRef

pub struct TraitRef<I: Interner> {
    pub trait_id: TraitId<I>,
    pub substitution: Substitution<I>,
}

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

impl<I: Interner> TraitRef<I>

pub fn with_as(&self) -> impl Debug + '_

Returns a “Debuggable” type that prints like P0 as Trait<P1..>.

pub fn with_colon(&self) -> impl Debug + '_

Returns a “Debuggable” type that prints like P0: Trait<P1..>.

impl<I: Interner> TraitRef<I>

pub fn type_parameters(&self, interner: I) -> impl Iterator<Item = Ty<I>> + '_

Gets all type parameters in this trait ref, including Self.

pub fn self_type_parameter(&self, interner: I) -> Ty<I>

Gets the type parameters of the Self type in this trait ref.

pub fn from_env(self) -> FromEnv<I>

Construct a FromEnv using this trait ref.

pub fn well_formed(self) -> WellFormed<I>

Construct a WellFormed using this trait ref.

Trait Implementations

impl<I: Interner> CastTo<TraitRef<I>> for TraitRef<I>

fn cast_to( self, _interner: <TraitRef<I> as HasInterner>::Interner ) -> TraitRef<I>

Cast a value to type T.

impl<I: Interner> CastTo<WhereClause<I>> for TraitRef<I>

fn cast_to(self, _interner: I) -> WhereClause<I>

Cast a value to type T.

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

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<I: Interner> Debug for TraitRef<I>

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

Formats the value using the given formatter.

impl<I: Interner> HasInterner for TraitRef<I>

type Interner = I

The interner associated with the type.

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

fn eq(&self, other: &TraitRef<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> TypeFoldable<I> for TraitRef<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>, 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 TraitRef<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: Interner> Zip<I> for TraitRef<I>

fn zip_with<Z: Zipper<I>>( zipper: &mut Z, variance: Variance, a: &Self, b: &Self ) -> Fallible<()>

Uses the zipper to walk through two values, ensuring that they match.

impl<I: Interner> Copy for TraitRef<I>

where I::InternedSubstitution: Copy,

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

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