pub fn get_yield<A: Any>() -> Option<A>
please use scope version instead
scope
get the passed in para
4fn sum(a: u32) -> u32 { 5 let mut sum = a; 6 let mut recv: u32; 7 while sum < 200 { 8 recv = get_yield().unwrap(); 9 yield_with(sum); 10 sum += recv; 11 } 12 13 sum 14}