macro_rules! parse_n_or_empty_unit_fn_signature { (0, true, $fn_name: ident) => { ... }; ($unit_count: tt, false, $fn_name: ident) => { ... }; ($unit_count: tt, true, $fn_name: ident) => { ... }; }
macro_rules! parse_n_or_empty_unit_fn_signature { (0, true, $fn_name: ident) => { ... }; ($unit_count: tt, false, $fn_name: ident) => { ... }; ($unit_count: tt, true, $fn_name: ident) => { ... }; }