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#[inline] slice::advance_by

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The8472
2021-08-03 21:32:36 +02:00
parent d5fd37f00f
commit e44d39a5b7
1 changed files with 3 additions and 2 deletions
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5
library/core/src/slice/iter/macros.rs
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@@ -185,8 +185,9 @@ macro_rules! iterator {
} }
} }
#[inline]
fn advance_by(&mut self, n: usize) -> Result<(), usize> { fn advance_by(&mut self, n: usize) -> Result<(), usize> {
let advance = cmp::min(n, len!(self)); let advance = cmp::min(len!(self), n);
// SAFETY: By construction, `advance` does not exceed `self.len()`. // SAFETY: By construction, `advance` does not exceed `self.len()`.
unsafe { self.post_inc_start(advance as isize) }; unsafe { self.post_inc_start(advance as isize) };
if advance == n { Ok(()) } else { Err(advance) } if advance == n { Ok(()) } else { Err(advance) }
@@ -381,7 +382,7 @@ macro_rules! iterator {
#[inline] #[inline]
fn advance_back_by(&mut self, n: usize) -> Result<(), usize> { fn advance_back_by(&mut self, n: usize) -> Result<(), usize> {
let advance = cmp::min(n, len!(self)); let advance = cmp::min(len!(self), n);
// SAFETY: By construction, `advance` does not exceed `self.len()`. // SAFETY: By construction, `advance` does not exceed `self.len()`.
unsafe { self.pre_dec_end(advance as isize) }; unsafe { self.pre_dec_end(advance as isize) };
if advance == n { Ok(()) } else { Err(advance) } if advance == n { Ok(()) } else { Err(advance) }