Revert "account/abi: convert if-else-if chain to tagged switch (#27869)"

This reverts commit c8563890cb.

accounts/abi/method.go

@@ -127,12 +127,11 @@ func NewMethod(name string, rawName string, funType FunctionType, mutability str
 		state = state + " "
 	}
 	identity := fmt.Sprintf("function %v", rawName)
-	switch funType {
+	if funType == Fallback {
-	case Fallback:
 		identity = "fallback"
-	case Receive:
+	} else if funType == Receive {
 		identity = "receive"
-	case Constructor:
+	} else if funType == Constructor {
 		identity = "constructor"
 	}
 	str := fmt.Sprintf("%v(%v) %sreturns(%v)", identity, strings.Join(inputNames, ", "), state, strings.Join(outputNames, ", "))

accounts/abi/method_test.go

@@ -84,12 +84,11 @@ func TestMethodString(t *testing.T) {
 
 	for _, test := range table {
 		var got string
-		switch test.method {
+		if test.method == "fallback" {
-		case "fallback":
 			got = abi.Fallback.String()
-		case "receive":
+		} else if test.method == "receive" {
 			got = abi.Receive.String()
-		default:
+		} else {
 			got = abi.Methods[test.method].String()
 		}
 		if got != test.expectation {

accounts/abi/unpack.go

@@ -160,14 +160,13 @@ func forEachUnpack(t Type, output []byte, start, size int) (interface{}, error)
 	// this value will become our slice or our array, depending on the type
 	var refSlice reflect.Value
 
-	switch t.T {
+	if t.T == SliceTy {
-	case SliceTy:
 		// declare our slice
 		refSlice = reflect.MakeSlice(t.GetType(), size, size)
-	case ArrayTy:
+	} else if t.T == ArrayTy {
 		// declare our array
 		refSlice = reflect.New(t.GetType()).Elem()
-	default:
+	} else {
 		return nil, errors.New("abi: invalid type in array/slice unpacking stage")
 	}