pub fn left<'a, I, O, A, B>(
left: Coroutine<'a, I, O, A>,
right: Coroutine<'a, I, O, B>
) -> Coroutine<'a, I, O, A>
Expand description
Runs a routine before the second routine
Result of the first routine is returned, second is ignored if you need both results, use tuple