Can Go Programmatically Retrieve a Function's Name?

Retrieving Function Names in Go

Question:

Is it possible to programmatically retrieve the name of a function in Go? For example, given the function foo(), can we determine its name using a method like GetFunctionName(foo)?

Answer:

Yes, it is possible to obtain the name of a function in Go using the runtime.FuncForPC function.

Solution:

Here's a solution using runtime.FuncForPC:

package main

import (
    "fmt"
    "reflect"
    "runtime"
)

func foo() {}

func GetFunctionName(i interface{}) string {
    return runtime.FuncForPC(reflect.ValueOf(i).Pointer()).Name()
}

func main() {
    fmt.Println("name:", GetFunctionName(foo))
}

Explanation:

• reflect.ValueOf(i).Pointer() retrieves the memory address of the function i.
• runtime.FuncForPC takes the pointer and returns a runtime.Func value.
• runtime.Func.Name() returns the name of the function associated with the runtime.Func value.

By calling GetFunctionName(foo), you'll get the string "foo" as the result.

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