Macro may::go_with

macro_rules! go_with {
    ($stack_size:expr, $func:expr) => { ... };
    ($name: expr, $stack_size:expr, $func:expr) => { ... };
}

macro used to spawn a coroutine with options such as name, stack_size.

this macro is just a convenient wrapper for spawn. However the supplied coroutine block is not wrapped in unsafe block