I want to instantiate an object in Go using reflection and call a method on it. However, I have no idea how to do this. I have tried something, but it does not work.
type foo struct {
name string
}
func (f *foo) Bar() {
f.name = "baz"
fmt.Println("hi " f.name)
}
func main() {
t := reflect.TypeOf(&foo{})
fooElement := reflect.New(t).Elem()
fooElement.MethodByName("Bar").Call([]reflect.Value{})
}
CodePudding user response:
reflect.New
works exactly like the new
function, in that it returns an allocated pointer to the given type. This means you want pass the struct, not a pointer to the struct, to reflect.TypeOf
.
t := reflect.TypeOf(foo{})
fooV := reflect.New(t)
Since you now have a pointer value of the correct type, you can call the method directly:
fooV.MethodByName("Bar").Call(nil)