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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-19 09:26:03 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-19 09:26:03 +0000 |
commit | 9918693037dce8aa4bb6f08741b6812923486c18 (patch) | |
tree | 21d2b40bec7e6a7ea664acee056eb3d08e15a1cf /vendor/itertools-0.11.0/src/extrema_set.rs | |
parent | Releasing progress-linux version 1.75.0+dfsg1-5~progress7.99u1. (diff) | |
download | rustc-9918693037dce8aa4bb6f08741b6812923486c18.tar.xz rustc-9918693037dce8aa4bb6f08741b6812923486c18.zip |
Merging upstream version 1.76.0+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'vendor/itertools-0.11.0/src/extrema_set.rs')
-rw-r--r-- | vendor/itertools-0.11.0/src/extrema_set.rs | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/vendor/itertools-0.11.0/src/extrema_set.rs b/vendor/itertools-0.11.0/src/extrema_set.rs new file mode 100644 index 000000000..ae128364c --- /dev/null +++ b/vendor/itertools-0.11.0/src/extrema_set.rs @@ -0,0 +1,48 @@ +use std::cmp::Ordering; + +/// Implementation guts for `min_set`, `min_set_by`, and `min_set_by_key`. +pub fn min_set_impl<I, K, F, Compare>( + mut it: I, + mut key_for: F, + mut compare: Compare, +) -> Vec<I::Item> +where + I: Iterator, + F: FnMut(&I::Item) -> K, + Compare: FnMut(&I::Item, &I::Item, &K, &K) -> Ordering, +{ + match it.next() { + None => Vec::new(), + Some(element) => { + let mut current_key = key_for(&element); + let mut result = vec![element]; + it.for_each(|element| { + let key = key_for(&element); + match compare(&element, &result[0], &key, ¤t_key) { + Ordering::Less => { + result.clear(); + result.push(element); + current_key = key; + } + Ordering::Equal => { + result.push(element); + } + Ordering::Greater => {} + } + }); + result + } + } +} + +/// Implementation guts for `ax_set`, `max_set_by`, and `max_set_by_key`. +pub fn max_set_impl<I, K, F, Compare>(it: I, key_for: F, mut compare: Compare) -> Vec<I::Item> +where + I: Iterator, + F: FnMut(&I::Item) -> K, + Compare: FnMut(&I::Item, &I::Item, &K, &K) -> Ordering, +{ + min_set_impl(it, key_for, |it1, it2, key1, key2| { + compare(it2, it1, key2, key1) + }) +} |