Go golang, syntax error: unexpected ++, expecting :

Question

  func test(args ...string) {
    var msg map[string] interface{}

    i := 0
    msg[\"product\"] = args[i++]
    msg[\"key\"] = args[i++]
    msg[\"signature\"] = args         


        

Answer 1

As other people have said i++ is a statement in go, not an expression as it is in C. Go has a different way of expressing the same intent using multiple assignment:

func test(args ...string) {
    msg := make(map[string]string)
    i := 0

    msg["product"], i = args[i], i+1
    msg["key"], i = args[i], i+1
    msg["signature"], i = args[i], i+1
    msg["string_to_sign"], i = args[i], i+1

    fmt.Printf("%v\n", msg)
}

Your definition of map would have failed at runtime too.