如何在没有外部库的情况下直接将 Go Map 转换为结构体？

import "reflect"

type MyStruct struct {
    Name string
    Age  int64
}

// SetField sets the value of a struct field by name.
func SetField(obj interface{}, name string, value interface{}) error {
    structValue := reflect.ValueOf(obj).Elem()
    field := structValue.FieldByName(name)

    if !field.IsValid() {
        return fmt.Errorf("No such field: %s in obj", name)
    }

    if !field.CanSet() {
        return fmt.Errorf("Cannot set %s field value", name)
    }

    val := reflect.ValueOf(value)
    if field.Type() != val.Type() {
        return errors.New("Provided value type didn't match obj field type")
    }

    field.Set(val)
    return nil
}

// FillStruct fills the struct fields with values from the map.
func (s *MyStruct) FillStruct(m map[string]interface{}) error {
    for k, v := range m {
        err := SetField(s, k, v)
        if err != nil {
            return err
        }
    }
    return nil
}

func main() {
    data := make(map[string]interface{})
    data["Name"] = "Tony"
    data["Age"] = int64(23)

    result := &MyStruct{}
    err := result.FillStruct(data)
    if err != nil {
        fmt.Println(err)
    }

    fmt.Println(result)
}