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#![allow(dead_code)]
pub mod parser;
use nom::error::Error;
use nom::error::ErrorKind;
use nom::error::ParseError;
use nom::Err;
use nom::IResult;
pub fn take_until_unbalanced(
opening_bracket: char,
closing_bracket: char,
) -> impl Fn(&str) -> IResult<&str, &str> {
move |i: &str| {
let mut index = 0;
let mut bracket_counter = 0;
while let Some(n) = &i[index..].find(&[opening_bracket, closing_bracket, '\\'][..]) {
index += n;
let mut it = i[index..].chars();
match it.next().unwrap_or_default() {
c if c == '\\' => {
index += '\\'.len_utf8();
let c = it.next().unwrap_or_default();
index += c.len_utf8();
}
c if c == opening_bracket => {
bracket_counter += 1;
index += opening_bracket.len_utf8();
}
c if c == closing_bracket => {
bracket_counter -= 1;
index += closing_bracket.len_utf8();
}
_ => unreachable!(),
};
if bracket_counter == -1 {
index -= closing_bracket.len_utf8();
return Ok((&i[index..], &i[0..index]));
};
}
if bracket_counter == 0 {
Ok(("", i))
} else {
Err(Err::Error(Error::from_error_kind(i, ErrorKind::TakeUntil)))
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use nom::error::ErrorKind;
#[test]
fn test_take_until_unmatched() {
assert_eq!(
take_until_unbalanced('(', ')')("url)abc"),
Ok((")abc", "url"))
);
assert_eq!(
take_until_unbalanced('(', ')')("u()rl)abc"),
Ok((")abc", "u()rl"))
);
assert_eq!(
take_until_unbalanced('(', ')')("u(())rl)abc"),
Ok((")abc", "u(())rl"))
);
assert_eq!(
take_until_unbalanced('(', ')')("u(())r()l)abc"),
Ok((")abc", "u(())r()l"))
);
assert_eq!(
take_until_unbalanced('(', ')')("u(())r()labc"),
Ok(("", "u(())r()labc"))
);
assert_eq!(
take_until_unbalanced('(', ')')(r#"u\((\))r()labc"#),
Ok(("", r#"u\((\))r()labc"#))
);
assert_eq!(
take_until_unbalanced('(', ')')("u(())r(labc"),
Err(nom::Err::Error(nom::error::Error::new(
"u(())r(labc",
ErrorKind::TakeUntil
)))
);
assert_eq!(
take_until_unbalanced('€', 'ü')("€uü€€üürlüabc"),
Ok(("üabc", "€uü€€üürl"))
);
}
}