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<'a>(
    &'a self,
    interner: &'a I
) -> impl Iterator<Item = Ty<I>> + 'a

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> Copy for TraitRef<I> where
    I::InternedSubstitution: Copy, 

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

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

Formats the value using the given formatter.

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

impl<I: Interner, _TI> Fold<I, _TI> for TraitRef<I> where
    _TI: TargetInterner<I>, 

type Result = TraitRef<_TI>

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).

fn fold_with<'i>(
    &self,
    folder: &mut dyn Folder<'i, I, _TI>,
    outer_binder: DebruijnIndex
) -> Fallible<Self::Result> where
    I: 'i,
    _TI: 'i, 

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.

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, 

Feeds a slice of this type into the given Hasher.

impl<I: PartialEq + Interner> PartialEq<TraitRef<I>> 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: &TraitRef<I>) -> bool

This method tests for !=.

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

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

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

fn visit_with<'i, R: VisitResult>(
    &self,
    visitor: &mut dyn Visitor<'i, I, Result = R>,
    outer_binder: DebruijnIndex
) -> R 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.

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

fn zip_with<'i, Z: Zipper<'i, I>>(
    zipper: &mut Z,
    a: &Self,
    b: &Self
) -> Fallible<()> where
    I: 'i, 

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