Enum chalk_ir::WhereClause

pub enum WhereClause<I: Interner> {
    Implemented(TraitRef<I>),
    AliasEq(AliasEq<I>),
    LifetimeOutlives(LifetimeOutlives<I>),
    TypeOutlives(TypeOutlives<I>),
}

Where clauses that can be written by a Rust programmer.

Variants

Implemented(TraitRef<I>)

Type implements a trait.

AliasEq(AliasEq<I>)

Type is equal to an alias.

LifetimeOutlives(LifetimeOutlives<I>)

One lifetime outlives another.

TypeOutlives(TypeOutlives<I>)

Type outlives a lifetime.

Implementations

impl<I: Interner> WhereClause<I>

pub fn into_well_formed_goal(self, interner: I) -> DomainGoal<I>

Turn a where clause into the WF version of it i.e.:

• Implemented(T: Trait) maps to WellFormed(T: Trait)
• ProjectionEq(<T as Trait>::Item = Foo) maps to WellFormed(<T as Trait>::Item = Foo)
• any other clause maps to itself

pub fn into_from_env_goal(self, interner: I) -> DomainGoal<I>

Same as into_well_formed_goal but with the FromEnv predicate instead of WellFormed.

pub fn trait_id(&self) -> Option<TraitId<I>>

If where clause is a TraitRef, returns its trait id.

Trait Implementations

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

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

Cast a value to type T.

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

fn cast_to(self, _interner: I) -> WhereClause<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: Interner> CastTo<WhereClause<I>> for TypeOutlives<I>

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

Cast a value to type T.

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

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

Cast a value to type T.

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

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

Returns a copy of the value.

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

Performs copy-assignment from source.

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

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

Formats the value using the given formatter.

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

type Interner = I

The interner associated with the type.

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

fn eq(&self, other: &WhereClause<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 WhereClause<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> TypeSuperVisitable<I> for WhereClause<I>

fn super_visit_with<B>( &self, visitor: &mut dyn TypeVisitor<I, BreakTy = B>, outer_binder: DebruijnIndex, ) -> ControlFlow<B>

Recursively visits the type contents.

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

where I::InternedSubstitution: Copy, I::InternedLifetime: Copy, I::InternedType: Copy,

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

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