range_set_blaze/
ranges_iter.rs

1use crate::Integer;
2use alloc::collections::btree_map;
3use core::{iter::FusedIterator, ops::RangeInclusive};
4
5/// This `struct` is created by the [`ranges`] method on [`RangeSetBlaze`]. See [`ranges`]'s
6/// documentation for more. Double-ended.
7///
8/// [`RangeSetBlaze`]: crate::RangeSetBlaze
9/// [`ranges`]: crate::RangeSetBlaze::ranges
10#[derive(Clone, Debug)]
11#[must_use = "iterators are lazy and do nothing unless consumed"]
12pub struct RangesIter<'a, T: Integer> {
13    pub(crate) iter: btree_map::Iter<'a, T, T>,
14}
15
16impl<T: Integer> ExactSizeIterator for RangesIter<'_, T> {
17    fn len(&self) -> usize {
18        self.iter.len()
19    }
20}
21
22impl<T: Integer> FusedIterator for RangesIter<'_, T> {}
23
24// Range's iterator is just the inside BTreeMap iterator as values
25impl<T: Integer> Iterator for RangesIter<'_, T> {
26    type Item = RangeInclusive<T>;
27
28    fn next(&mut self) -> Option<Self::Item> {
29        self.iter.next().map(|(start, end)| *start..=*end)
30    }
31
32    fn size_hint(&self) -> (usize, Option<usize>) {
33        self.iter.size_hint()
34    }
35}
36
37impl<T: Integer> DoubleEndedIterator for RangesIter<'_, T> {
38    fn next_back(&mut self) -> Option<Self::Item> {
39        self.iter.next_back().map(|(start, end)| *start..=*end)
40    }
41}
42
43/// This `struct` is created by the [`into_ranges`] method on [`RangeSetBlaze`]. See [`into_ranges`]'s
44/// documentation for more. Double-ended.
45///
46/// [`RangeSetBlaze`]: crate::RangeSetBlaze
47/// [`into_ranges`]: crate::RangeSetBlaze::into_ranges
48#[must_use = "iterators are lazy and do nothing unless consumed"]
49#[derive(Debug)]
50pub struct IntoRangesIter<T: Integer> {
51    pub(crate) iter: alloc::collections::btree_map::IntoIter<T, T>,
52}
53
54impl<T: Integer> ExactSizeIterator for IntoRangesIter<T> {
55    fn len(&self) -> usize {
56        self.iter.len()
57    }
58}
59
60impl<T: Integer> FusedIterator for IntoRangesIter<T> {}
61
62// Range's iterator is just the inside BTreeMap iterator as values
63impl<T: Integer> Iterator for IntoRangesIter<T> {
64    type Item = RangeInclusive<T>;
65
66    fn next(&mut self) -> Option<Self::Item> {
67        self.iter.next().map(|(start, end)| start..=end)
68    }
69
70    fn size_hint(&self) -> (usize, Option<usize>) {
71        self.iter.size_hint()
72    }
73}
74
75impl<T: Integer> DoubleEndedIterator for IntoRangesIter<T> {
76    fn next_back(&mut self) -> Option<Self::Item> {
77        self.iter.next_back().map(|(start, end)| start..=end)
78    }
79}
range_set_blaze/ranges_iter.rs

range_set_blaze/
ranges_iter.rs
