Trait rustc_infer::infer::lattice::LatticeDir

pub trait LatticeDir<'f, 'tcx>: TypeRelation<'tcx> {
    fn infcx(&self) -> &'f InferCtxt<'f, 'tcx>;
    fn cause(&self) -> &ObligationCause<'tcx>;
    fn add_obligations(&mut self, obligations: Vec<PredicateObligation<'tcx>>);
    fn define_opaque_types(&self) -> bool;
    fn relate_bound(
        &mut self,
        v: Ty<'tcx>,
        a: Ty<'tcx>,
        b: Ty<'tcx>
    ) -> RelateResult<'tcx, ()>;
}

Trait for returning data about a lattice, and for abstracting over the “direction” of the lattice operation (LUB/GLB).

GLB moves “down” the lattice (to smaller values); LUB moves “up” the lattice (to bigger values).

Required Methods

fn infcx(&self) -> &'f InferCtxt<'f, 'tcx>

fn cause(&self) -> &ObligationCause<'tcx>

fn add_obligations(&mut self, obligations: Vec<PredicateObligation<'tcx>>)

fn define_opaque_types(&self) -> bool

fn relate_bound(
    &mut self,
    v: Ty<'tcx>,
    a: Ty<'tcx>,
    b: Ty<'tcx>
) -> RelateResult<'tcx, ()>

Implementors

impl<'combine, 'infcx, 'tcx> LatticeDir<'infcx, 'tcx> for Glb<'combine, 'infcx, 'tcx>

impl<'combine, 'infcx, 'tcx> LatticeDir<'infcx, 'tcx> for Lub<'combine, 'infcx, 'tcx>