case castString:
		s, err := stringCast(v)
		return FromString(s), err

	case castTimestamp:
		t, err := timestampCast(v)
		return FromTimestamp(t), err

	case castBool:
		b, err := boolCast(v)
		return FromBool(b), err

	case castDecimal, castNumeric:
		fallthrough

	default:
		return nil, errUnimplementedCast
	}
}

func intCast(v *Value) (int64, error) {

  unsigned char value;
  TF_OperationGetAttrBool(oper, "v", &value, s_);
  EXPECT_EQ(TF_OK, TF_GetCode(s_)) << TF_Message(s_);
  EXPECT_EQ(1, value);
}

TEST_F(CApiAttributesTest, BoolList) {
  const unsigned char list[] = {0, 1, 1, 0, 0, 1, 1};
  const size_t list_size = TF_ARRAYSIZE(list);

  auto desc = init("list(bool)");
  TF_SetAttrBoolList(desc, "v", list, list_size);