Function rustc_trait_selection::infer::lattice::super_lattice_tys

pub fn super_lattice_tys<'a, 'tcx, L>(
    this: &mut L, 
    a: &TyS, 
    b: &TyS
) -> Result<&TyS, TypeError> where
    'tcx: 'a,
    L: LatticeDir<'a, 'tcx>,