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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:20:39 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:20:39 +0000 |
commit | 1376c5a617be5c25655d0d7cb63e3beaa5a6e026 (patch) | |
tree | 3bb8d61aee02bc7a15eab3f36e3b921afc2075d0 /library/core/src/iter/sources/repeat_n.rs | |
parent | Releasing progress-linux version 1.69.0+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-1376c5a617be5c25655d0d7cb63e3beaa5a6e026.tar.xz rustc-1376c5a617be5c25655d0d7cb63e3beaa5a6e026.zip |
Merging upstream version 1.70.0+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'library/core/src/iter/sources/repeat_n.rs')
-rw-r--r-- | library/core/src/iter/sources/repeat_n.rs | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/library/core/src/iter/sources/repeat_n.rs b/library/core/src/iter/sources/repeat_n.rs index dc61d6065..0b0445850 100644 --- a/library/core/src/iter/sources/repeat_n.rs +++ b/library/core/src/iter/sources/repeat_n.rs @@ -1,5 +1,6 @@ use crate::iter::{FusedIterator, TrustedLen}; use crate::mem::ManuallyDrop; +use crate::num::NonZeroUsize; /// Creates a new iterator that repeats a single element a given number of times. /// @@ -137,7 +138,7 @@ impl<A: Clone> Iterator for RepeatN<A> { } #[inline] - fn advance_by(&mut self, skip: usize) -> Result<(), usize> { + fn advance_by(&mut self, skip: usize) -> Result<(), NonZeroUsize> { let len = self.count; if skip >= len { @@ -145,7 +146,8 @@ impl<A: Clone> Iterator for RepeatN<A> { } if skip > len { - Err(len) + // SAFETY: we just checked that the difference is positive + Err(unsafe { NonZeroUsize::new_unchecked(skip - len) }) } else { self.count = len - skip; Ok(()) @@ -178,7 +180,7 @@ impl<A: Clone> DoubleEndedIterator for RepeatN<A> { } #[inline] - fn advance_back_by(&mut self, n: usize) -> Result<(), usize> { + fn advance_back_by(&mut self, n: usize) -> Result<(), NonZeroUsize> { self.advance_by(n) } |