是否可以區分switch case[]interface{}和interface{}in switch case？嘗試創建一個解碼函數，您可以在其中傳遞不同的類型，然后 switch case 確定類型，然后繼續解碼該特定類型。雖然當傳遞的類型是[]interface{}.我一直在試驗這個reflect包，但到目前為止沒有運氣。請參閱下面的代碼片段和游樂場鏈接。package mainimport ( "fmt" "math/big")type Test struct { t interface{}}func main() { testVar1 := big.NewInt(0) testVar2 := int64(1) testVar3 := []byte("test") testVar4 := true testVar5 := []int{1, 2, 3, 4} var testVar6 Test Issue(testVar1) Issue(testVar2) Issue(testVar3) Issue(testVar4) Issue(testVar5) Issue(testVar6)}func Issue(t interface{}) { switch t.(type) { case *big.Int: fmt.Println("*big.Int") case int8, int16, int32, int64: fmt.Println("int8, int16, int32, int64") case []byte: fmt.Println("[]byte") case bool: fmt.Println("bool") case []interface{}: fmt.Println("how to get testVar5 to print here") fmt.Println("[]interface{}") case interface{}: fmt.Println("interface{}") default: fmt.Println("unsupported type") }}結果：*big.Intint8, int16, int32, int64[]byteboolinterface{}interface{}有什么辦法可以testVar5破案[]interface{}嗎？https://play.golang.org/p/U0dJF9CEbTX
2 回答
慕姐4208626
TA貢獻1852條經驗 獲得超7個贊
reflect你可以像這樣使用這個包：
package main
import (
"fmt"
"math/big"
"reflect"
)
type Test struct {
t interface{}
}
func main() {
testVar1 := big.NewInt(0)
testVar2 := int64(1)
testVar3 := []byte("test")
testVar4 := true
testVar5 := []int{1, 2, 3, 4}
var testVar6 Test
Issue(testVar1)
Issue(testVar2)
Issue(testVar3)
Issue(testVar4)
Issue(testVar5)
Issue(testVar6)
}
func Issue(t interface{}) {
switch t.(type) {
case *big.Int:
fmt.Println("*big.Int")
case int8, int16, int32, int64:
fmt.Println("int8, int16, int32, int64")
case []byte:
fmt.Println("[]byte")
case bool:
fmt.Println("bool")
case interface{}:
rt := reflect.TypeOf(t)
switch rt.Kind() {
case reflect.Slice:
fmt.Println("Slice")
case reflect.Array:
fmt.Println("Array")
default:
fmt.Println("interface{}")
}
default:
fmt.Println("unsupported type")
}
}
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