todo2 0.1.2

An enhanced todo macro inspired by todo_or_die
Documentation 
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use crate::Result;
use chrono::NaiveDate;

pub(crate) struct ChronoCalc {
    pub(crate) year: i32,
    pub(crate) month: Option<u32>,
    pub(super) day: Option<u32>,
}

impl ChronoCalc {
    #[inline(always)]
    pub(super) fn _calc(&self) -> Result<u64> {
        let date =
            NaiveDate::from_ymd_opt(self.year, self.month.unwrap_or(1), self.day.unwrap_or(1))
                .ok_or_else(|| "Invalid date".to_string())?;
        Ok(date
            .and_hms_opt(0, 0, 0)
            .expect("Internal error")
            .timestamp() as u64)
    }
}