package stub type ItemId int const ( // Coin 金币 Coin ItemId = 1000 // Diamonds 钻石 Diamonds ItemId = 1001 // ClubCoins 俱乐部币 ClubCoins ItemId = 1003 ) var itemName = map[ItemId]string{ Coin: "金币", Diamonds: "钻石", ClubCoins: "俱乐部币", } func (i ItemId) String() string { str, ok := itemName[i] if !ok { str = "unknown" } return str }