import time

struct St {
    a int
}

fn f1_good(ch1 chan St, ch2 chan int, ch3 chan int) {
    mut a := 5
    select {
        a = <- ch3 {
            println(a)
        }
        b := <- ch1 {
            println(b.a)
        }
        ch1 <- a {
            a++
        }
        > 50 * time.millisecond {
            println('timeout')
        }
    }
    println('done')
}

fn f2_good(ch1 chan St) {
    select {
        b := <- ch1 {
            println(b)
        }
        else {
            println('no channel ready')
        }
    }
}

fn f3_bad(ch1 chan St) {
    select {
        b := 17 {
            println(b)
        }
    }
}

fn main() {}