我正在嘗試從 []byte 變量中讀取結(jié)構(gòu)。當(dāng)我嘗試讀取單個變量時，我可以使其工作，但是當(dāng)嘗試直接讀取結(jié)構(gòu)時，我收到以下錯誤： panic: reflect: reflect.Value.SetInt using value obtained using unexported field這是我嘗試過的：package mainimport ( "bytes" "encoding/binary" "fmt")type foo struct { a int8 b int8}func main() { var data1 int8 var data2 foo b := []byte{0x18, 0x2d, 0x44, 0x54, 0xfb, 0x21, 0x09, 0x40} buf := bytes.NewReader(b) // READ data1 (int8) fmt.Println("READ data1") err := binary.Read(buf, binary.LittleEndian, &data1) if err != nil { fmt.Println("binary.Read failed:", err) } fmt.Println(data1) // READ data2 (struct with two int8s) fmt.Println(data2) err = binary.Read(buf, binary.LittleEndian, &data2) if err != nil { fmt.Println("binary.Read failed:", err) } fmt.Print(data2)}這是完整的錯誤：READ data124{0 0}panic: reflect: reflect.Value.SetInt using value obtained using unexported fieldgoroutine 1 [running]:reflect.flag.mustBeAssignableSlow(0x1a3) /usr/local/go-faketime/src/reflect/value.go:257 +0x1b9reflect.flag.mustBeAssignable(...) /usr/local/go-faketime/src/reflect/value.go:247reflect.Value.SetInt(0x4a9760, 0xc00010000c, 0x1a3, 0x2d) /usr/local/go-faketime/src/reflect/value.go:1633 +0x3bencoding/binary.(*decoder).value(0xc00006ae50, 0x4a9760, 0xc00010000c, 0x1a3) /usr/local/go-faketime/src/encoding/binary/binary.go:574 +0x9a5encoding/binary.(*decoder).value(0xc00006ae50, 0x4b17e0, 0xc00010000c, 0x199) /usr/local/go-faketime/src/encoding/binary/binary.go:558 +0x3a8encoding/binary.Read(0x4e2460, 0xc00010c000, 0x4e2ea0, 0x58c588, 0x4a5d80, 0xc00010000c, 0x0, 0x0) /usr/local/go-faketime/src/encoding/binary/binary.go:259 +0x33amain.main() /tmp/sandbox052619529/prog.go:36 +0x358Program exited: status 2.可以在此處找到可重現(xiàn)的示例：https://play.golang.org/p/4UWy2OuDAsL
1 回答
蕭十郎
TA貢獻(xiàn)1815條經(jīng)驗 獲得超13個贊
問題是您的foo結(jié)構(gòu)字段未導(dǎo)出（第一個字母未大寫），因此反射包無法訪問那些進行寫入（它仍然可以讀取未導(dǎo)出的字段）。
將您的結(jié)構(gòu)更改為：
type foo struct {
A int8
B int8
}- 1 回答
- 0 關(guān)注
- 107 瀏覽
添加回答
舉報
0/150
提交
取消