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Use get_unchecked in str::[r]split_once

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This commit is contained in:
nickkuk 2021-09-24 16:06:50 +05:00
parent 197fc8591e
commit a35aaa2108
1 changed files with 4 additions and 2 deletions
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6
library/core/src/str/mod.rs
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@ -1524,7 +1524,8 @@ impl str {
#[inline]
pub fn split_once<'a, P: Pattern<'a>>(&'a self, delimiter: P) -> Option<(&'a str, &'a str)> {
let (start, end) = delimiter.into_searcher(self).next_match()?;
Some((&self[..start], &self[end..]))
// SAFETY: `Searcher` is known to return valid indices.
unsafe { Some((self.get_unchecked(..start), self.get_unchecked(end..))) }
}
/// Splits the string on the last occurrence of the specified delimiter and
@ -1544,7 +1545,8 @@ impl str {
P: Pattern<'a, Searcher: ReverseSearcher<'a>>,
{
let (start, end) = delimiter.into_searcher(self).next_match_back()?;
Some((&self[..start], &self[end..]))
// SAFETY: `Searcher` is known to return valid indices.
unsafe { Some((self.get_unchecked(..start), self.get_unchecked(end..))) }
}
/// An iterator over the disjoint matches of a pattern within the given string