From 9918693037dce8aa4bb6f08741b6812923486c18 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 19 Jun 2024 11:26:03 +0200 Subject: Merging upstream version 1.76.0+dfsg1. Signed-off-by: Daniel Baumann --- vendor/itertools-0.11.0/src/concat_impl.rs | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 vendor/itertools-0.11.0/src/concat_impl.rs (limited to 'vendor/itertools-0.11.0/src/concat_impl.rs') diff --git a/vendor/itertools-0.11.0/src/concat_impl.rs b/vendor/itertools-0.11.0/src/concat_impl.rs new file mode 100644 index 000000000..f022ec90a --- /dev/null +++ b/vendor/itertools-0.11.0/src/concat_impl.rs @@ -0,0 +1,23 @@ +use crate::Itertools; + +/// Combine all an iterator's elements into one element by using [`Extend`]. +/// +/// [`IntoIterator`]-enabled version of [`Itertools::concat`]. +/// +/// This combinator will extend the first item with each of the rest of the +/// items of the iterator. If the iterator is empty, the default value of +/// `I::Item` is returned. +/// +/// ```rust +/// use itertools::concat; +/// +/// let input = vec![vec![1], vec![2, 3], vec![4, 5, 6]]; +/// assert_eq!(concat(input), vec![1, 2, 3, 4, 5, 6]); +/// ``` +pub fn concat(iterable: I) -> I::Item + where I: IntoIterator, + I::Item: Extend<<::Item as IntoIterator>::Item> + IntoIterator + Default +{ + #[allow(deprecated)] //TODO: once msrv hits 1.51. replace `fold1` with `reduce` + iterable.into_iter().fold1(|mut a, b| { a.extend(b); a }).unwrap_or_default() +} -- cgit v1.2.3