map的赋值问题

``` package main import ( "fmt" ) var person map[string]struct {name string} func main() { type nameStruct struct {name string} var person2 map[string]nameStruct person2 = person fmt.Println(person2) } ``` 这样编译的时候 person2 = person这一句出错： cannot use person (type map[string]struct { name string }) as type map[string]name in assignment 但是 **struct { name string }** 和 ** nameStruct ** 不是一样的吗？