Macro gen_object_list

macro_rules! gen_object_list {
    ($fn:ident, $typ:tt, $count: ident) => { ... };
    ($fn:ident, $typ:tt, $count: ident, $param_1: ident, $param_2: ident) => { ... };
    ($fn:ident, $typ:tt, $count: ident, $param_1: ident, $param_2: ident, $param_3: ident) => { ... };
}