macro_rules! assert_scope { () => { ... }; ($num_constants:expr, $num_public:expr, $num_private:expr, $num_constraints:expr) => { ... }; (<=$num_constants:expr, $num_public:expr, $num_private:expr, $num_constraints:expr) => { ... }; (<=$num_constants:expr, <=$num_public:expr, <=$num_private:expr, <=$num_constraints:expr) => { ... }; ($case:expr, $num_constants:expr, $num_public:expr, $num_private:expr, $num_constraints:expr) => { ... }; }