从函数类型获取结构

Question

I currently have the following code

func (r *Router) Get(path string, controller interface{}) {
    ...
    t := reflect.TypeOf(controller)
    ...
}

That is called doing the following

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

The second argument is basically this

type Test struct {
    *Controller
    Name string
}

func (t Test) IsWorking() {

}

type Controller struct {
    Method   string
    Request  *http.Request
    Response http.ResponseWriter
    Data     map[interface{}]interface{}
}

I want to get the struct the function refers to. create a new struct of that type and call the function so for example

controllers.Test.IsWorking

Create a Test struct and call IsWorking()

Answer 1

To make a new pointer to a newly allocated struct of the type in the interface, all you need is

newController := reflect.New(reflect.TypeOf(controller)).Interface()

Or to set a value on the new instance first:

newController := reflect.New(reflect.TypeOf(controller))
newController.Elem().FieldbyName("Method").Set(reflect.ValueOf("GET"))

If you want to create a pointer to a struct and call the IsWorking method, it looks like

t := reflect.New(reflect.TypeOf(Test{}))
t.MethodByName("IsWorking").Call(nil)