我们可以在Go中使用函数指针吗？

Question

I was learning about pointers in Go. And managed to write something like:

func hello(){

       fmt.Println("Hello World")
}

func main(){

       pfunc := hello     //pfunc is a pointer to the function "hello"
       pfunc()            //calling pfunc prints "Hello World" similar to hello function
}

Is there a way to declare the function pointer without defining it as done above? Can we write something like we do in C?

e.g. void (*pfunc)(void);

Answer 1

It works if you're using the signature. There's no pointer.

type HelloFunc func(string)

func SayHello(to string) {
    fmt.Printf("Hello, %s!
", to)
}

func main() {
    var hf HelloFunc

    hf = SayHello

    hf("world")
}

Alternatively you can use the function signature directly, without declaring a new type.