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Implement method for digit grouping suggestions

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This commit is contained in:
Jay Hardee 2017-07-30 18:37:11 -04:00
parent fbbd788799
commit 471b6811d8
1 changed files with 43 additions and 0 deletions
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43
clippy_lints/src/literal_digit_grouping.rs
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@ -140,6 +140,49 @@ impl<'a> DigitInfo<'a> {
float: float,
}
}
/// Returns digits grouped in a sensible way.
fn grouping_hint(&self) -> String {
let group_size = self.radix.suggest_grouping();
if self.digits.contains('.') {
let mut parts = self.digits.split(".");
let int_part_hint = parts
.next()
.unwrap()
.chars()
.rev()
.filter(|&c| c != '_')
.collect::<Vec<_>>()
.chunks(group_size)
.map(|chunk| chunk.into_iter().rev().collect())
.rev()
.collect::<Vec<String>>()
.join("_");
let frac_part_hint = parts
.next()
.unwrap()
.chars()
.filter(|&c| c != '_')
.collect::<Vec<_>>()
.chunks(group_size)
.map(|chunk| chunk.into_iter().collect())
.collect::<Vec<String>>()
.join("_");
format!("{}.{}{}", int_part_hint, frac_part_hint, self.suffix.unwrap_or(""))
} else {
let hint = self.digits
.chars()
.rev()
.filter(|&c| c != '_')
.collect::<Vec<_>>()
.chunks(group_size)
.map(|chunk| chunk.into_iter().rev().collect())
.rev()
.collect::<Vec<String>>()
.join("_");
format!("{}{}{}", self.prefix.unwrap_or(""), hint, self.suffix.unwrap_or(""))
}
}
}
enum WarningType {