Go 中的通用编程。避免硬编码类型断言

Question

我正在编写一个通用缓存机制，我需要在结构中设置一些属性，只知道它们的reflect.Type、属性名称和reflect.Value 要在属性中设置，但我无法避免类型断言，这使得我的代码不通用...func main() {    addressNew := Address{"New Address description!"}    // In the real problem, i know the reflect.Type of value, but    // the struct came to me as a interface{}, just like this method    // Return many kinds of values from redis as interface{},     // (Customer, Order, Address, Product, SKU etc), in a generic way,    // but returns the reflect.Type of value also.    interfaceSomeValue := getMyValue()    fmt.Printf("%v", interfaceSomeValue)    fmt.Println("")    // This portion of code comes from my cache mechanism, that is a library     // used by other projects. My cache lib really can't know all others    // type structs to perform the type assertion, but the cache mechanism know     // the reflect.Type of the interface.     // If you try at this way, will cause a panic by try to access a FieldByName    // in a interface, because the Customer comes from getMyValue and     // becomes a interface{}, and now a type assertion is     // required -> http://play.golang.org/p/YA8U9_KzC9    newCustomerNewAttribute := SetAttribute(&interfaceSomeValue, "Local", interface{}(addressNew), reflect.TypeOf(Customer{}))    fmt.Printf("%v", newCustomerNewAttribute)    fmt.Println("")}func SetAttribute(object interface{}, attributeName string, attValue interface{}, objectType reflect.Type) interface{} {    if reflect.ValueOf(object).Kind() != reflect.Ptr {        panic("need a pointer")    }    value := reflect.ValueOf(object).Elem()    field := value.FieldByName(attributeName)    valueForAtt := reflect.ValueOf(attValue)    field.Set(valueForAtt)    return value.Interface()}