macro_rules! macro {
    {
        f($x:expr, $y:expr, $z:expr);
        $($c:expr => {
            $($m:expr => {
               $($s:expr => $b:expr),+
            }),+
        }),+
    } => {{
            match ($x, $y, $z) {
                $(
                ($c, $m, $s => $b),
                )+
            }
          }};
}