demo_chan.go

package trygo

import "fmt"

func dup3(in chan int) (chan int, chan int, chan int) {
	a, b, c := make(chan int, 2), make(chan int, 2), make(chan int, 2)
	go func() {
		for {
			x := <-in
			a <- x
			b <- x
			c <- x
		}
	}()
	return a, b, c
}

func fib() chan int {
	x := make(chan int, 2)
	a, b, out := dup3(x)
	go func() {
		x <- 0
		x <- 1
		<-a
		for {
			x <- <-a + <-b
		}
	}()
	return out
}

// DemoChan func
func DemoChan() {
	x := fib()
	for i := 0; i < 10; i++ {
		fmt.Println(<-x)
	}
}