Trait rustc_next_trait_solver::relate::combine::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.

Object Safety

This trait is not object safe.

Implementors