Function rustc_middle::ty::relate::check_const_value_eq

fn check_const_value_eq<R: TypeRelation<'tcx>, 'tcx>(
    relation: &mut R, 
    a_val: ConstValue<'tcx>, 
    b_val: ConstValue<'tcx>, 
    a: &'tcx Const<'tcx>, 
    b: &'tcx Const<'tcx>
) -> RelateResult<'tcx, bool>