tokio/tokio-stream/src/macros.rs

macro_rules! cfg_time {
    ($($item:item)*) => {
        $(
            #[cfg(feature = "time")]
            #[cfg_attr(docsrs, doc(cfg(feature = "time")))]
            $item
        )*
    }
}

macro_rules! ready {
    ($e:expr $(,)?) => {
        match $e {
            std::task::Poll::Ready(t) => t,
            std::task::Poll::Pending => return std::task::Poll::Pending,
        }
    };
}