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Slight simplification of chars().count() #81409

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Merged
bors merged 4 commits into from
Jan 30, 2021
Merged

Slight simplification of chars().count() #81409

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328abfb
Slight simplification of chars().count()
gilescope Jan 26, 2021
425a70a
Removing if so it's more like the previous implementation.
gilescope Jan 26, 2021
c07e558
Let's try the most idiomatic way.
gilescope Jan 26, 2021
a623ea5
Same instructions, but simpler.
gilescope Jan 26, 2021
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Same instructions, but simpler.
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@gilescope
gilescope committed Jan 26, 2021
commit a623ea5301737507a8229c2ddae74b20f727bd1b
2 changes: 1 addition & 1 deletion library/core/src/str/iter.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -47,7 +47,7 @@ impl<'a> Iterator for Chars<'a> {
#[inline]
fn count(self) -> usize {
// length in `char` is equal to the number of non-continuation bytes
self.iter.map(|&byte| !utf8_is_cont_byte(byte) as usize).sum()
self.iter.filter(|&&byte| !utf8_is_cont_byte(byte)).count()
}

#[inline]
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