2022 鐵人賽文 搬回點部落
開始試煉
繼續寫operator
自訂物件 也可以定義 true 跟 false
這樣就可以用if(a)了
void Main()
{
var a = new Gil(10);
var b = new Gil(0);
if (a)
{
true.Dump("if(a)");
}
if (b)
{
}
else
{
false.Dump("if(b)");
}
}
public class Gil
{
public int Amount { get; set; }
public string CurrencyName { get; } = "GD";
public Gil(int amount)
{
Amount = amount;
}
public static bool operator true(Gil x) => x.Amount > 0;
public static bool operator false(Gil x) => x.Amount <= 0;
public override string ToString() => $"{Amount} {CurrencyName}";
}
處理轉換
實做explicit 明確轉換,implicit 隱含轉換
像是 Gil 的 Amount 是其實是int 所以int intGil = a;
Gil c = (Gil)50;
也是直接轉換是很方便的
void Main()
{
int intGil = a;
intGil.Dump("intGil");
Gil c = (Gil)50;
c.Dump("c");
}
public class Gil
{
public int Amount { get; set; }
public string CurrencyName { get; } = "GD";
public Gil(int amount)
{
Amount = amount;
}
public static bool operator true(Gil x) => x.Amount > 0;
public static bool operator false(Gil x) => x.Amount <= 0;
public static implicit operator int(Gil x) => x.Amount;
public static explicit operator Gil(int x) => new Gil(x);
public override string ToString() => $"{Amount} {CurrencyName}";
}
結束試煉
自訂 class 四部曲 結束啦
如果內容有誤請多鞭策謝謝