Go by Example: Channel Directions
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When using channels as function parameters, you can specify if a channel is meant to only send or receive values. This specificity increases the type-safety of the program. |
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package main
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import "fmt"
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This |
func ping(pings chan<- string, msg string) {
pings <- msg
}
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The |
func pong(pings <-chan string, pongs chan<- string) {
msg := <-pings
pongs <- msg
}
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func main() {
pings := make(chan string, 1)
pongs := make(chan string, 1)
ping(pings, "passed message")
pong(pings, pongs)
fmt.Println(<-pongs)
}
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$ go run channel-directions.go
passed message
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