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replace Option combinators with try block

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This commit is contained in:
The8472 2021-07-19 20:21:54 +02:00
parent 8dd903cc77
commit c3ac8d8b86
1 changed files with 2 additions and 6 deletions
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8
library/core/src/iter/adapters/flatten.rs
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@ -319,12 +319,8 @@ where
let (lower, upper) = self.iter.size_hint();
let lower = lower.saturating_mul(fixed_size).saturating_add(lo);
let upper = upper.and_then(|i| i.checked_mul(fixed_size));
let upper = fhi
.zip_with(bhi, usize::checked_add)
.flatten()
.zip_with(upper, usize::checked_add)
.flatten();
let upper =
try { fhi?.checked_add(bhi?)?.checked_add(fixed_size.checked_mul(upper?)?)? };
return (lower, upper);
}