Function bicoro::map

pub fn map<'a, I, O, A, B, F>(
    co: Coroutine<'a, I, O, A>,
    map: F
) -> Coroutine<'a, I, O, B>where
    F: FnOnce(A) -> B + 'a,

Map the inner type of the coroutine

This is sugar of bind and result

use bicoro::*;
let co :Coroutine<i32,(),String> = map(receive(), |a| a.to_string());