Crappy CSV parser in Rust.

cparser.rs

/// Very, very, very, VERY bad CSV parser. If you're wondering, I wrote this because
/// rustc-serializer was not working at some point, and needed a simple parser.
pub fn parse_csv(s : String) -> Vec< Vec<String> > {
    let mut buff: String = String::new();
    let mut record: Vec<String>        = Vec::new();
    let mut ret:    Vec< Vec<String> > = Vec::new();

    for c in s.chars() {
        println!("{}.", c);
        match c {
            /* Field separator */
            ',' => {
                record.push(buff.clone());
                buff.clear()
            },

            /* Record separator */
            '\n' => {
                record.push(buff.clone());
                buff.clear();
                ret.push(record.clone());
                record.clear();
            },

            /* Aggregate data */
            _ => {
                buff.push(c);
            }
        }
    }

    if buff.len() > 0 {
        record.push(buff.clone());
    }

    if record.len() > 0 {
        ret.push(record.clone());
    }

    return ret;
}