flatiron 1.0.5

A parser and HTML renderer for the Textile markup language
Documentation 
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use crate::structs::InlineTag;
use nom::{
    branch::alt,
    bytes::complete::tag,
    combinator::{fail, value},
    multi::fold_many0,
    sequence::delimited,
    IResult,
};

pub fn no_textile(input: &str) -> IResult<&str, InlineTag> {
    let (rest, content) = delimited(
        tag("=="),
        fold_many0(
            alt((
                value("\\", tag("\\\\")),
                value("==", tag("\\==")),
                no_textile_content,
            )),
            String::new,
            |mut acc, s| {
                acc.push_str(s);
                acc
            },
        ),
        tag("=="),
    )(input)?;
    Ok((rest, InlineTag::NoTextile(content)))
}

fn no_textile_content(input: &str) -> IResult<&str, &str> {
    let res: IResult<&str, &str> = alt((tag("=="), tag("\\")))(input);
    if let Err(_) = res {
        if input != "" {
            return Ok((&input[1..], &input[0..1]));
        }
    }
    fail(input)
}

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

    #[test]
    fn no_textile_basic() {
        let input = "==hello *world!*==";
        let result = no_textile(input);
        assert_eq!(
            result,
            Ok(("", InlineTag::NoTextile(String::from("hello *world!*",))))
        );
    }

    #[test]
    fn no_textile_with_equals() {
        let input =
            "==This is two equals signs: \\== here are two more: \\====";
        let result = no_textile(input);
        assert_eq!(
            result,
            Ok((
                "",
                InlineTag::NoTextile(String::from(
                    "This is two equals signs: == here are two more: ==",
                ))
            ))
        );
    }
}