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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:03:36 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:03:36 +0000 |
commit | 17d40c6057c88f4c432b0d7bac88e1b84cb7e67f (patch) | |
tree | 3f66c4a5918660bb8a758ab6cda5ff8ee4f6cdcd /src/tools/clippy/src/docs/iter_with_drain.txt | |
parent | Adding upstream version 1.64.0+dfsg1. (diff) | |
download | rustc-upstream/1.65.0+dfsg1.tar.xz rustc-upstream/1.65.0+dfsg1.zip |
Adding upstream version 1.65.0+dfsg1.upstream/1.65.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/tools/clippy/src/docs/iter_with_drain.txt')
-rw-r--r-- | src/tools/clippy/src/docs/iter_with_drain.txt | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/tools/clippy/src/docs/iter_with_drain.txt b/src/tools/clippy/src/docs/iter_with_drain.txt new file mode 100644 index 000000000..2c52b99f7 --- /dev/null +++ b/src/tools/clippy/src/docs/iter_with_drain.txt @@ -0,0 +1,16 @@ +### What it does +Checks for use of `.drain(..)` on `Vec` and `VecDeque` for iteration. + +### Why is this bad? +`.into_iter()` is simpler with better performance. + +### Example +``` +let mut foo = vec![0, 1, 2, 3]; +let bar: HashSet<usize> = foo.drain(..).collect(); +``` +Use instead: +``` +let foo = vec![0, 1, 2, 3]; +let bar: HashSet<usize> = foo.into_iter().collect(); +```
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