Trait rustc_trait_selection::infer::relate::PredicateEmittingRelation

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

Required Methods

fn span(&self) -> <I as Interner>::Span

fn param_env(&self) -> <I as Interner>::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 as Interner>::Predicate>>, )

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

fn register_predicates( &mut self, obligations: impl IntoIterator>, )

where <impl IntoIterator as IntoIterator>::Item: Upcast<I, <I as Interner>::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 as Interner>::Ty, b: <I as Interner>::Ty, )

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

Object Safety

This trait is not object safe.

Implementors