我希望下面的方法將傳入結(jié)構(gòu)的字段Set設(shè)置為按值傳入的值，即沒有指針間接尋址。APtrB為了通過 go 反射工作，我可能必須將該值復(fù)制到我有地址的新位置？不管怎樣，我怎樣才能讓它發(fā)揮作用？我擁有的是非指針值的工作版本。type A struct { AnInt int}type B struct { AnA A APtr *A}func Set(strukt interface{}, fieldName string, newFieldValue interface{}) { struktValueElem := reflect.ValueOf(strukt).Elem() field := struktValueElem.FieldByName(fieldName) newFieldValueValue := reflect.ValueOf(newFieldValue) if field.Kind() == reflect.Ptr { // ?? implement me } else { // not a pointer? more straightforward: field.Set(newFieldValueValue) }}func main() { aB := B{} anA := A{4} Set(&aB, "AnA", anA) // works Set(&aB, "APtr", anA) // implement me}游樂場：https://play.golang.org/p/6tcmbXxBcIm
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Smart貓小萌
TA貢獻(xiàn)1911條經(jīng)驗 獲得超7個贊
func Set(strukt interface{}, fieldName string, newFieldValue interface{}) {
struktValueElem := reflect.ValueOf(strukt).Elem()
field := struktValueElem.FieldByName(fieldName)
newFieldValueValue := reflect.ValueOf(newFieldValue)
if field.Kind() == reflect.Ptr {
rt := field.Type() // type *A
rt = rt.Elem() // type A
rv := reflect.New(rt) // value *A
el := rv.Elem() // value A (addressable)
el.Set(newFieldValueValue) // el is addressable and has the same type as newFieldValueValue (A), Set can be used
field.Set(rv) // field is addressable and has the same type as rv (*A), Set can be used
} else { // not a pointer? more straightforward:
field.Set(newFieldValueValue)
}
}
https://play.golang.org/p/jgEK_rKbgO9
https://play.golang.org/p/B6vOONQ-RXO（緊湊）
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