How do I compare two functions for pointer equality in the latest Go weekly?

Question

In Go, is there any way to compare two non-nil function pointers to test for equality? My standard of equality is pointer equality. If not, is there any particular reason why pointer equality is not allowed?

As of now, if I attempt to do this in the straight-forward way:

package main

import "fmt"

func SomeFun() {
}

func main() {
    fmt.Println(SomeFun == SomeFun)
}

I get

./func-pointers.go:12: invalid operation: SomeFun == SomeFun (func can only be compared to nil)

It is my understanding that this behavior was introduced recently.

---

I've found an answer using the reflect package; however Atom suggests below that this actually produces undefined behavior. See Atom's post for more info and a possible alternative solution.

package main

import "fmt"
import "reflect"

func SomeFun() { }

func AnotherFun() { }

func main() {
    sf1 := reflect.ValueOf(SomeFun)
    sf2 := reflect.ValueOf(SomeFun)
    fmt.Println(sf1.Pointer() == sf2.Pointer())

    af1 := reflect.ValueOf(AnotherFun)
    fmt.Println(sf1.Pointer() == af1.Pointer())
}

Outputs:

true
false

Answer 1

Waitting for answers