return std::result::Result::Err(std::convert::From::from($err));

        return std::result::Result::Err($crate::anyhow!($err));

#[cfg(test)]
mod test {
    use super::*;
    #[test]
    fn anyhow() {
        let error1 = anyhow!("This {}", "works");
        let error2 = anyhow!("This works");
        assert_eq!(error1.to_string(), error2.to_string());
    }
    #[test]
    fn bail() {
        let f = || -> Result<()> { bail!("This {}", "works") };
        let error1 = f().err().unwrap();
        let f = || -> Result<()> { bail!("This works") };
        let error2 = f().err().unwrap();
        assert_eq!(error1.to_string(), error2.to_string());
    }
}