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Simplify CharIndices.next #61070

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Simplify CharIndices.next #61070

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14 changes: 4 additions & 10 deletions src/libcore/str/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -663,16 +663,10 @@ impl<'a> Iterator for CharIndices<'a> {

#[inline]
fn next(&mut self) -> Option<(usize, char)> {
let pre_len = self.iter.iter.len();
match self.iter.next() {
None => None,
Some(ch) => {
let index = self.front_offset;
let len = self.iter.iter.len();
self.front_offset += pre_len - len;
Some((index, ch))
}
}
let ch = self.iter.next()?;
let index = self.front_offset;
self.front_offset += ch.len_utf8();
Some((index, ch))
}

#[inline]
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