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Code Issues Releases Wiki Activity

Prefer returning None instead of the Empty Filter state

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Clément Renault 2021-12-09 11:13:12 +01:00
parent 80dcfd5c3e
commit ef59762d8e
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GPG key ID: 92ADA4E935E71FA4
4 changed files with 47 additions and 43 deletions
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12
filter-parser/src/lib.rs
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@ -109,7 +109,6 @@ pub enum FilterCondition<'a> {
And(Box<Self>, Box<Self>),
GeoLowerThan { point: [Token<'a>; 2], radius: Token<'a> },
GeoGreaterThan { point: [Token<'a>; 2], radius: Token<'a> },
Empty,
}
impl<'a> FilterCondition<'a> {
@ -144,18 +143,17 @@ impl<'a> FilterCondition<'a> {
},
Or(a, b) => And(a.negate().into(), b.negate().into()),
And(a, b) => Or(a.negate().into(), b.negate().into()),
Empty => Empty,
GeoLowerThan { point, radius } => GeoGreaterThan { point, radius },
GeoGreaterThan { point, radius } => GeoLowerThan { point, radius },
}
}
pub fn parse(input: &'a str) -> Result<Self, Error> {
pub fn parse(input: &'a str) -> Result<Option<Self>, Error> {
if input.trim().is_empty() {
return Ok(Self::Empty);
return Ok(None);
}
let span = Span::new_extra(input, input);
parse_filter(span).finish().map(|(_rem, output)| output)
parse_filter(span).finish().map(|(_rem, output)| Some(output))
}
}
@ -560,7 +558,7 @@ pub mod tests {
result.unwrap_err()
);
let filter = result.unwrap();
assert_eq!(filter, expected, "Filter `{}` failed.", input);
assert_eq!(filter, Some(expected), "Filter `{}` failed.", input);
}
}
@ -605,7 +603,7 @@ pub mod tests {
#[test]
fn depth() {
let filter = FilterCondition::parse("account_ids=1 OR account_ids=2 OR account_ids=3 OR account_ids=4 OR account_ids=5 OR account_ids=6").unwrap();
let filter = FilterCondition::parse("account_ids=1 OR account_ids=2 OR account_ids=3 OR account_ids=4 OR account_ids=5 OR account_ids=6").unwrap().unwrap();
assert!(filter.token_at_depth(5).is_some());
}
}