为什么带有匿名结构字段的结构不满足在该类型的别名上定义的方法？

I have a struct defined outside my package that I would like to attach a method to. Due to the fact that the package is reflecting on the original type, I cannot use the alias within my struct, I have to use the original type. Below is essentially what I'm trying to do:

package main

import "fmt"

type Entity struct {
    loc_x int
    loc_y int
}

type Player struct {
    Entity
    name string
}

type Alias Entity

func (e Alias) PrintLocation() {
    fmt.Printf("(%v, %v)", e.loc_x, e.loc_y)
}

func main() {
    player := new(Player)
    player.PrintLocation()
}

Attempting to compile this results in type *Player has no field or method PrintLocation. If I define the PrintLocation() method on Entity, it works. If Alias and Entity are the same exact thing, why is the compiler complaining?

That is not an alias. byte and uint8 are aliases, but what you have created is a new type ,Alias, with the underlying type of Entity.

Different types have their own set of methods and doesn't inherit them from the underlying type.

So Entity has no methods at all, and Alias has the method of PrintLocation().

There're a few things that are wrong here:

1 - new(Player) returns a pointer to a newly allocated zero value of type Player http://golang.org/doc/effective_go.html#allocation_new

You should use Player{} instead.

2 - The receiver of your PrintLocation method is Alias, which has nothing to do with Entity or Player.