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handle the case of empty input
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@ -91,6 +91,9 @@ impl<'a> FilterCondition<'a> {
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}
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pub fn parse<E: FPError<'a>>(input: &'a str) -> Result<Self, E> {
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if input.trim().is_empty() {
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return Ok(Self::Empty);
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}
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let span = Span::new(input);
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parse_expression::<'a, E>(span).finish().map(|(_rem, output)| output)
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}
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