// core::ops

pub enum OneSidedRangeBound {
    StartInclusive,
    End,
    EndInclusive,
}

pub const trait OneSidedRange<T>: RangeBounds<T> {
    fn bound(self) -> (OneSidedRangeBound, T);
}

impl<T> OneSidedRange<T> for RangeTo<T>
where
    Self: RangeBounds<T>,
{
    fn bound(self) -> (OneSidedRangeBound, T);
}

impl<T> OneSidedRange<T> for RangeFrom<T>
where
    Self: RangeBounds<T>,
{
    fn bound(self) -> (OneSidedRangeBound, T);
}

impl<T> OneSidedRange<T> for RangeToInclusive<T>
where
    Self: RangeBounds<T>,
{
    fn bound(self) -> (OneSidedRangeBound, T);
}