pointers - How to pass a struct's method as a parameter into another function using golang -

sorry, post question again.

i have been read solution before ask question. think can not me because question how pass function parameter? don't want call it.

i want pass function can't edit (or don't want edit), , want use string variable point function

funcname := "go"  m.set(t.funcname) 

i think different question call struct , method name in go?

for example

i have function like:

type context struct{} type myclass struct{} type handler func (c *context)  func (r *myclass) set(ch handler)  {  } 

i can use way:

type testclass struct {} func (t *testclass) go(c *context){     println("hello"); }  t := &testclass{} m := &myclass{} m.set(t.go) 

and question is

type testclass struct{} func (t *testclass) go(c *context){     println("hello"); }  t := &testclass{} m := &myclass{}  funcname := "go" m.set(t.funcname) 

any way can this?

reflect?or what?

if impossible, there other ways this?

thanks

you can method name using reflect package. here's function handler given name:

func handlerbyname(v interface{}, name string) (handler, error) {   m := reflect.valueof(v).methodbyname(name)   if !m.isvalid() {     return nil, errors.new("method not found")   }   h, ok := m.interface().(func(*context))   if !ok {     return nil, errors.new("method not handler")   }   return h, nil } 

here's how use function:

h, err := handlerbyname(t, "go") if err != nil {    // handle error } m.set(h) 

playground example

note function returned handlerbyname reflection wrapper around original function (thanks @oneofone pointing out). calling wrapper slow compared calling function directly.