(PCC)::[How-to-Channel-Directions-to-specificity-increases-the-type-safety-of-the-program-in-go-language]::[go]
package main
import "fmt"
func ping(pings chan<- string, msg string) {
pings <- msg
}
func pong(pings <-chan string, pongs chan<- string) {
msg := <-pings
pongs <- msg
}
func main() {
pings := make(chan string, 1)
pongs := make(chan string, 1)
ping(pings, "passed message")
pong(pings, pongs)
fmt.Println(<-pongs)
} 