有什么办法可以解决的问题，包括无法访问的return语句？

Question

I have the following function:

func fitrange(a, x, b int) int {
    if a > b {
        a, b = b, a
    }
    switch true {
    case x < a:
        return a
    case x > b:
        return b
    default:
        return x
    }
}

The go compiler complains that the "function ends without a return statement" even though every possible path through the switch statement returns a value. Is there any way to get around this other than adding a dummy return statement at the end of the function?

Answer 1

Instead of adding a return at the end, you can also pacify the compiler by adding a panic. It's not a bad idea because if your code contains a bug and that "unreachable" line is ever reached, your program will halt promptly rather than plow ahead with a potentially wrong answer.