Trait PredicateEmittingRelation

pub trait PredicateEmittingRelation<Infcx, I = I>: TypeRelation<I>
where
    Infcx: InferCtxtLike<Interner = I>,
    I: Interner,
{
    // Required methods
    fn span(&self) -> I::Span;
    fn param_env(&self) -> I::ParamEnv;
    fn structurally_relate_aliases(&self) -> StructurallyRelateAliases;
    fn register_goals(
        &mut self,
        obligations: impl IntoIterator<Item = Goal<I, I::Predicate>>,
    );
    fn register_predicates(
        &mut self,
        obligations: impl IntoIterator<Item: Upcast<I, I::Predicate>>,
    );
    fn register_alias_relate_predicate(&mut self, a: I::Ty, b: I::Ty);
}

Required Methods

fn span(&self) -> I::Span

fn param_env(&self) -> I::ParamEnv

fn structurally_relate_aliases(&self) -> StructurallyRelateAliases

Whether aliases should be related structurally. This is pretty much always No unless you’re equating in some specific locations of the new solver. See the comments in these use-cases for more details.

fn register_goals( &mut self, obligations: impl IntoIterator<Item = Goal<I, I::Predicate>>, )

Register obligations that must hold in order for this relation to hold

fn register_predicates( &mut self, obligations: impl IntoIterator<Item: Upcast<I, I::Predicate>>, )

Register predicates that must hold in order for this relation to hold. This uses the default param_env of the obligation.

fn register_alias_relate_predicate(&mut self, a: I::Ty, b: I::Ty)

Register AliasRelate obligation(s) that both types must be related to each other.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<Infcx, I> PredicateEmittingRelation<Infcx> for SolverRelating<'_, Infcx, I>

where Infcx: InferCtxtLike<Interner = I>, I: Interner,