deadlock.go

package main

type end struct{}

// !int . ?string . end
func party1(intChannel chan int, stringChannel chan string, endChannel chan end) {
    //!int
    intChannel <- 42
    // ?string
    <-stringChannel
    // end
    endChannel <- end{}

}

// !string . ?int . end
func party2(intChannel chan int, stringChannel chan string, endChannel chan end) {
    //!string
    stringChannel <- "Hello World"
    // ?int
    <-intChannel
    //end
    endChannel <- end{}
}

func main() {
    intChannel := make(chan int)
    stringChannel := make(chan string)
    endChannel := make(chan end)
    go party1(intChannel, stringChannel, endChannel)
    go party2(intChannel, stringChannel, endChannel)
    <-endChannel
    <-endChannel
}