use core::ops::{Range, RangeFrom, RangeFull, RangeTo};
pub trait IndexRange<T = usize> {
#[inline]
fn start(&self) -> Option<T> {
None
}
#[inline]
fn end(&self) -> Option<T> {
None
}
}
impl<T> IndexRange<T> for RangeFull {}
impl<T: Copy> IndexRange<T> for RangeFrom<T> {
#[inline]
fn start(&self) -> Option<T> {
Some(self.start)
}
}
impl<T: Copy> IndexRange<T> for RangeTo<T> {
#[inline]
fn end(&self) -> Option<T> {
Some(self.end)
}
}
impl<T: Copy> IndexRange<T> for Range<T> {
#[inline]
fn start(&self) -> Option<T> {
Some(self.start)
}
#[inline]
fn end(&self) -> Option<T> {
Some(self.end)
}
}