27 lines
804 B
Rust
27 lines
804 B
Rust
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use nom::branch::alt;
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use nom::bytes::complete::tag;
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use nom::character::complete::line_ending;
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use nom::character::complete::space0;
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use nom::combinator::eof;
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use nom::combinator::recognize;
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use nom::combinator::verify;
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use nom::multi::many1_count;
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use nom::sequence::tuple;
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use super::Context;
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use crate::error::Res;
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use crate::parser::util::start_of_line;
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use crate::parser::Keyword;
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#[tracing::instrument(ret, level = "debug")]
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pub fn keyword<'r, 's>(context: Context<'r, 's>, input: &'s str) -> Res<&'s str, Keyword<'s>> {
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start_of_line(context, input)?;
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let (remaining, rule) = recognize(tuple((
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space0,
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verify(many1_count(tag("-")), |dashes| *dashes >= 5),
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space0,
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alt((line_ending, eof)),
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)))(input)?;
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Ok((remaining, Keyword { source: rule }))
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}
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