/// Unwraps `Option` and invokes `return` on `None`.
#[macro_export]
macro_rules! try_opt {
    ($task:expr) => {
        match $task {
            Some(v) => v,
            None => return,
        }
    };
}

/// Unwraps `Option` and invokes `return $ret` on `None`.
#[macro_export]
macro_rules! try_opt_or {
    ($task:expr, $ret:expr) => {
        match $task {
            Some(v) => v,
            None => return $ret,
        }
    };
}

/// Unwraps `Option` and invokes `return $ret` on `None` with a warning.
#[macro_export]
macro_rules! try_opt_warn_or {
    ($task:expr, $ret:expr, $msg:expr) => {
        match $task {
            Some(v) => v,
            None => {
                log::warn!($msg);
                return $ret;
            }
        }
    };
    ($task:expr, $ret:expr, $fmt:expr, $($arg:tt)*) => {
        match $task {
            Some(v) => v,
            None => {
                log::warn!($fmt, $($arg)*);
                return $ret;
            }
        }
    };
}