rrdbc 0.2.1

dbc parser
Documentation 
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use std::fmt;

use nom::bytes::complete::tag;
use nom::combinator::map;
use nom::sequence::preceded;
use nom::{IResult, Parser};

use super::char_string::{parser_char_string, CharString};
use super::common_parsers::spacey;
use super::error::DbcParseError;

/// Version identifier of the DBC file.
///
/// Format: `VERSION "<VersionIdentifier>"`
#[derive(PartialEq, Debug, Clone)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub struct Version(pub CharString);

impl fmt::Display for Version {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, r#"VERSION "{}""#, self.0)
    }
}

pub fn parser_version(input: &str) -> IResult<&str, Version, DbcParseError> {
    let res = map(preceded(spacey(tag("VERSION")), parser_char_string), |s| {
        Version(s)
    })
    .parse(input);
    match res {
        Ok((remain, version)) => {
            log::info!("parse version: {}", version.0);
            Ok((remain, version))
        }
        Err(e) => {
            log::trace!("parse version failed, e = {e:?}");
            Err(nom::Err::Error(DbcParseError::BadVersion))
        }
    }
}

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

    #[test]
    fn test_dbc_version_01() {
        assert_eq!(
            parser_version(r#"VERSION "1.0.0""#),
            Ok(("", Version(CharString("1.0.0".into()))))
        );
    }

    #[test]
    fn test_dbc_version_02() {
        assert_eq!(
            parser_version(r#"VERSION  "3.0.1""#),
            Ok(("", Version(CharString("3.0.1".into()))))
        );
    }

    #[test]
    fn test_dbc_version_03() {
        assert_eq!(
            parser_version(r#"VERSION        "9""#),
            Ok(("", Version(CharString("9".into()))))
        );
    }

    #[test]
    fn test_version_string_01() {
        let version = Version(CharString("9".into()));
        assert_eq!(version.to_string(), r#"VERSION "9""#);
    }

    #[test]
    fn test_version_string_02() {
        let version = Version(CharString("0.0.1".into()));
        assert_eq!(version.to_string(), r#"VERSION "0.0.1""#);
    }
}