反映：如何获取结构域的名称？

type User struct { Name string }

func test(o interface{}) {
    t := reflect.TypeOf(o)
    fmt.Println(t)
}

u := &User{"Bob"}
test(u.Name) // prints "string", but I need "Name"

Is this possible in Go? I want to have as few "magic strings" as possible, so instead of having

UpdateFields("Name", "Password")

I'd much rather use

UpdateFields(user.Name, user.Password)

You can't do that. The closest thing I can think of, but it's damn ugly so do not take it as the answer is something like this:

package main

import(
    "fmt"
    "reflect"
)

type Foo struct {
    Bar string
    Baz int
}

var Foo_Bar = reflect.TypeOf(Foo{}).Field(0).Name
var Foo_Baz = reflect.TypeOf(Foo{}).Field(1).Name

func main(){
    fmt.Println(Foo_Bar, Foo_Baz)
}

You can make this work by defining a new type that is based off of string, and use that as the type inside of your struct:

package main

import "fmt"
import "reflect"

type Name string
type User struct {
    Name Name
}

func test(o interface{}) {
    t := reflect.TypeOf(o)
    fmt.Println(t.Name())
}

func main() {
    u := &User{"Bob"}
    test(u.Name) // Prints "Name"
    test("Tim") // Prints "string"
}

Playground.