Rust Nom 解析器无法消耗无效输入

我的测试parse_line_repeat在最后一行崩溃(这在这一点上是无效的)，而不是像测试本身所示将其作为余数返回.

我试着用tuple代替pair,many0代替many1，第一个用this blogpost on nom解，第二个再读documentation on choosing a combinator.

我想要做的可能被描述为错误恢复，但这article不是这样说的，因此我不知道为什么要搜索.

这是lib.rs美元

use nom::{
    branch::alt,
    bytes::complete::tag,
    character::complete::space0,
    multi::{many1, many_till},
    sequence::pair,
    IResult,
};

fn parse_token(input: &str) -> IResult<&str, bool> {
    let (remaining, token) = alt((tag("0"), tag("1")))(input)?;
    if token == "1" {
        return Ok((remaining, true));
    } else {
        return Ok((remaining, false));
    }
}

#[allow(dead_code)]
fn parse_line(input: &str) -> IResult<&str, Vec<bool>> {
    let (remaining, (tokens_raw, _)) = pair(
        many1(many_till(space0, parse_token)),
        many_till(space0, tag("\n")),
    )(input)?;

    let mut tokens = Vec::new();

    for (_, token) in tokens_raw {
        let token: bool = token;
        tokens.push(token);
    }

    Ok((remaining, tokens))
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn parse_token_test() {
        assert_eq!(parse_token("0"), Ok(("", false)));
        assert_eq!(parse_token("1"), Ok(("", true)));
    }

    #[test]
    fn parse_line_test() {
        assert_eq!(parse_line("1 \n"), Ok(("", vec![true])));
        assert_eq!(parse_line("0 \n"), Ok(("", vec![false])));
        assert_eq!(
            parse_line("1 1 1 1\n"),
            Ok(("", vec![true, true, true, true]))
        );
    }

    #[test]
    fn parse_line_repeat() {
        let rtn = parse_line("1 \n 1\n");
        assert_eq!(rtn, Ok((" 1\n", vec![true])));
        let rtn = parse_line(rtn.unwrap().0);
        assert_eq!(rtn, Ok(("", vec![true])));
        let rtn = parse_line("1\n 1\n\n");
        assert_eq!(rtn, Ok((" 1\n\n", vec![true])));
        let rtn = parse_line(rtn.unwrap().0);
        assert_eq!(rtn, Ok(("\n", vec![true])));
        let rtn = parse_line(rtn.unwrap().0);
        assert_eq!(rtn, Ok(("\n", vec![])));
    }    
}

这是Cargo.toml美元

[package]
name = "minimal"
version = "0.1.0"
edition = "2021"

[lib]
name = "minimal"
path = "src/lib.rs"

[dependencies]
nom = "7.1.3"

错误:

$ cargo test
    Finished test [unoptimized + debuginfo] target(s) in 0.94s
     Running unittests minimal/main.rs

running 3 tests
test tests::parse_line_test ... ok
test tests::parse_token_test ... ok
test tests::parse_line_repeat ... FAILED

failures:

---- tests::parse_line_repeat stdout ----
thread 'tests::parse_line_repeat' panicked at 'assertion failed: `(left == right)`
  left: `Err(Error(Error { input: "\n", code: ManyTill }))`,
 right: `Ok(("\n", []))`', minimal/main.rs:67:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace


failures:
    tests::parse_line_repeat

test result: FAILED. 2 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

error: test failed, to rerun pass `--lib`

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