53 lines
2.1 KiB
Rust
53 lines
2.1 KiB
Rust
macro_rules! failable_sequence {
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($name:ident,$inp:ident,$context:ident,$begin_matcher:expr,$element_matcher:expr,$success_matcher:expr) => {
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pub fn $name<'b, F>(
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$context: &'b NomContext<F>,
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) -> impl for<'a> FnMut(
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&'a str,
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) -> nom::IResult<
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&'a str,
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crate::parser::text::Sequence<'a>,
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VerboseError<&'a str>,
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> + 'b
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where
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F: for<'a> nom::Parser<&'a str, &'a str, VerboseError<&'a str>>,
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{
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let fail_matcher = $context.fail_matcher.clone();
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let new_fail_matcher = alt((
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|i| fail_matcher.borrow_mut().parse(i),
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recognize($success_matcher),
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));
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move |$inp: &str| {
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let new_context = $context.with_no_bold();
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// let other_new_context = NomContext::with_additional_fail_matcher(
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// |i: &str| recognize($success_matcher)(i),
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// $context,
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// );
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let other_new_context = super::nom_context::NomContext::new(new_fail_matcher);
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let element_matcher = recognize($element_matcher(&new_context));
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let local_fail_matcher = $context.fail_matcher.clone();
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let ret = map(
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recognize(tuple((
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$begin_matcher,
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nom::multi::many_till(
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nom::sequence::preceded(
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not(|i| local_fail_matcher.borrow_mut().parse(i)),
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element_matcher,
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),
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nom::sequence::preceded(
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not(|i| local_fail_matcher.borrow_mut().parse(i)),
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$success_matcher,
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),
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),
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))),
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|s: &str| crate::parser::text::Sequence { contents: s },
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)($inp)?;
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Ok(ret)
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}
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}
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};
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}
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pub(crate) use failable_sequence;
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