parsers.rs

#[derive(Debug, PartialEq)]
pub struct TodoCmd {
    pub body: String,
    pub deadline: Option<String>,
    pub scheduled: Option<String>
}

named!(todo<&str, &str>, tag_no_case_s!("TODO "));
named!(todo_text<&str, &str>, alt_complete!(take_until_s!(" DEADLINE") | take_until_s!(" SCHEDULED") | rest_s));
named!(deadline<&str, &str>, do_parse!(
        t: tag_no_case_s!(" DEADLINE ") >>
        d: alt_complete!(take_until_s!(" SCHEDULED") | rest_s) >>
        (d)
        ));
named!(scheduled<&str, &str>, do_parse!(
        t: tag_no_case_s!(" SCHEDULED ") >>
        d: alt_complete!(take_until_s!(" DEADLINE") | rest_s) >>
        (d)
        ));

named!(pub command<&str, Command>, do_parse!(
        todo >>
        c: todo_text >>
        d: opt!(deadline) >>
        s: opt!(scheduled) >>
        (Command::Todo(TodoCmd {
            body: c.to_string(),
            deadline: match d {
                Some(deadline) => Some(deadline.to_string()),
                None => None
            },
            scheduled: match s {
                Some(scheduled) => Some(scheduled.to_string()),
                None => None
            },
        }))
        ));