How to get struct of function

[nakot...@gmail.com]

Lets say an example function like this

func (r *Router) Get(path string, controller interface{}) {}

And I am calling it this way

Route.Get("/", controllers.Test.IsWorking)

Refering to this function

type Test struct {
 Name string
}


func (t Test) IsWorking() {
 log.Println("hello")
}

How can I get what struct is the function using? I mean on this example the struct would be Test and the function IsWorking... I have no idea how to achieve this

Running a reflect TypeOf to controller returns this

func(controllers.Test)

But I am not sure how to create a reflect.New of the type of controller.Test (without knowing about it)

[Peter Waller]

Try this:

https://play.golang.org/p/zJa8N24nxi

--

package main

import (

"fmt"

"log"

"reflect"

)

func main() {

var controller interface{} = Test.IsWorking

funcTyp := reflect.TypeOf(controller)

structTyp := funcTyp.In(0)

newValue := reflect.New(structTyp).Interface()

fmt.Printf("%#+v", newValue)

[Bruno Luis Panuto Silva]

I suggest you also take a look at the Go spec that describes method values: https://golang.org/ref/spec#Method_values
It seems to click on what you want to do.
Also, take a look at this article from Alex Edwards: http://www.alexedwards.net/blog/organising-database-access more specifically, the "Dependency Injection" part. Look at how he takes the method booksIndex from a struct and is still able to reference to *Env in the handler.

Regards,
Bruno