英文:
How to get struct field from refect.Value
问题
给定的代码片段如下：
type Runnable interface {
Run()
}
type T struct {
Z struct {
A int
}
}
func (t T) Run() {
t.Z.A = 1
}
func main() {
t := reflect.TypeOf(T{})
var v reflect.Value
v = reflect.New(t).Elem()
runnable := v.Interface().(Runnable)
runnable.Run()
}
在最后，有没有办法获取由Run()方法设置的Z及其字段值？
我正在实现一个API命令模式，所以T可以是RegisterCommand、LoginCommand、LogoutCommand等。Z是“输出文档”，即API命令返回的JSON文档，我希望能够声明性地指定并在命令运行后将其写入网络。
英文:
Given
type Runnable interface {
Run()
}
type T struct {
Z struct {
A int
}
}
func (t T) Run() {
t.Z.A = 1
}
func main() {
t := reflect.TypeOf( T{} )
var v reflect.Value
v = reflect.New(t).Elem()
runnable := v.Interface().(Runnable)
runnable.Run()
Is there a way, at the end, to retrive Z and its field values as set by the Run() method?
I am implementing an API command pattern, so T could be RegisterCommand, LoginCommand, LogoutCommand etc. Z is the 'output doc' - a JSON doc returned by the API command - which I want to specify declaratively and have written to the network after the command is run.
答案1
得分: 1
明白了！感谢synful提供的“指针” 
z := v.Elem().FieldByName("Z").Interface()
英文:
Got it! Thank you to synful for the 'pointer'
z := v.Elem().FieldByName("Z").Interface()
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