pub trait OneSidedRange<T>: RangeBounds<T> where
    T: ?Sized, { }🔬 This is a nightly-only experimental API. (
one_sided_range)Expand description
OneSidedRange is implemented for built-in range types that are unbounded
on one side. For example, a.., ..b and ..=c implement OneSidedRange,
but .., d..e, and f..=g do not.
Types that implement OneSidedRange<T> must return Bound::Unbounded
from one of RangeBounds::start_bound or RangeBounds::end_bound.