可用于类型声明中的结构的访问方法

Question

Is it possible to access methods that are declared in a type's underlying type? For example, I want a ResourceSet to be able to call my Set type's AddId method .

See: http://play.golang.org/p/Fcg6Ryzb67

package main

type Resource struct { 
  Id uint32
}

type Set map[uint32]struct{}

func (s Set) AddId(id uint32) {
  s[id] = struct{}{}
}

type ResourceSet Set

func (s ResourceSet) Add(resource Resource) {
  id := resource.Id
  s.AddId(id)
}

func main() {
  resource := Resource{Id: 1}

  s := ResourceSet{}
  s.Add(resource)
}

The error I'm getting is:

s.AddId undefined (type ResourceSet has no field or method AddId)

Answer 1

The whole point of a new named type is to have a fresh and empty method set.

Embedding is a different story and add some syntactical sugar to call methods of embedded types.